1NOTES FROM THE SIXTH FORMAL COORDINATED ENERGY AND WATER-CYCLE OBSERVATIONSPROJECT (CEOP) TELECONFERENCE ON EUROPE-NEESPI-AFRICA REGIONAL HYDROCLIMATEPROJECTS AND REFERENCE SITE ISSUES HELD ON
7 September 2010
Final DRAFT, 16 November 2010
1.

INTRODUCTION

The 6th Europe-NEESPI-Africa RHP and Reference Sites Teleconference related to the Coordinated Energy
and Water-Cycle Observations Project (CEOP) took place on Tuesday 7 September at 13:00 UTC.
The issues that were discussed on the subject conference call included:
(i)
(ii)
(iii)

The Pan-GEWEX Meeting in Seattle, USA, 23 – 28 August and its Outcomes
Overview of all site data at CEOP Reference Site Data Archive;
RHP/Reference Site data providers/managers reports;

Participants
The participants were:
Steve Williams
Hans-Joerg Isemer
Fred Bosveld
Frank Beyrich
Philippe Drobinski
Pasha Groisman
Gianni Tartari
Elisa Vuillermoz
Roberta ToffolonCharles Wrench
Sam Benedict
Petra Koudelova

Boulder, Colorado, USA; GHP, formerly CEOP Data Management
Representing BALTEX RHP and GHP, formerly CEOP Data Management
The Netherlands, BALTEX Cabauw site representative
Germany, BALTEX Lindenberg site representative
France, HyMeX Representative
USA, Representing NEESPI RHP
Italy, Representing CEOP_HE group and Italian reference sites
Italy, Representing CEOP_HE group and Italian reference sites
Italy, Representing CEOP_HE group and Italian reference sites
UK, Chilbolton site representative
USA; GHP, formerly CEOP International Coordination Function
Japan; GHP, formerly CEOP International Coordination Function

Drs. Dennis Lettenmaier (USA, GHP, formerly CEOP Co-Chair), Toshio Koike (Japan, Former CEOP CoChair and Data Integration Chair), Esko Kyrö (Finland; FMI representative), Timo Ryyppo (Sodankylä,
Finland ; Sodankylä site manager), and Thierry Lebel (Representing AMMA RHP) responded to theannouncements but were not available for the call. Nevertheless, Timo Ryyppo provided a written updateon the Sodankylä site in advance.
2.

NEXT CONFERENCE CALLth

The next, 7 CEOP Europe-NEESPI-Africa RHP and Reference Sites Teleconference is
proposed to take place on Tuesday 18 January 2011, at 13:00 UTC. Koudelova/Benedict have theaction (A1) to inform the group of the details of the next call nearer to the time of the call and to coordinate
the origination of the call (action A1a).

3.

CEOP AND CEOP DATA GROUP GENERAL ISSUES

3.1 WCRP and GEWEX related issues(3.1a) Benedict reported on the Pan-GEWEX meeting in Seattle, USA, on 23 – 28 August 2010 and its
outcomes (http://www.gewex.org/2010pangewex/home.html). That event included a Business Meeting of
CEOP and it was held in parallel with meetings of the other GEWEX Panels, namely, the GEWEX Modelingand Prediction Panel (GMPP) and the GEWEX Radiation Panel (GRP). Following the Plenary sessions andthe parallel Panel meetings the GEWEX Scientific Steering Group (SSG) also met.
The outcome of these events included a number of decisions, recommendations and actions
specifically associated with CEOP as well as a set of general (Pan-GEWEX) actions for all the Panels. A
still preliminary summary of key events that took place at both the PGM and the SSG Meeting as submitted
by the SSG Chairman Dr Kevin Trenberth is attached below (ATTACHMENT1). This document was
distributed to the broader CEOP community subsequently after the call together with a list of actions draftedat the end of the SSG Meeting.

2
The main changes that have taken place recently with respect to CEOP include:
1. The SSG accepted Prof Toshio Koike’s decision to step down as Co-Chair of CEOP effective at theclose of the PGM at Seattle. This action, followed Dr Ron Stewart’s resignation, which was taken at
the close of the SSG meeting at New Delhi India, 25-29 January 2010,
2. Dr Dennis Lettenmaier was named Co-Chair of CEOP to replace Dr Stewart, effective at the end of
the SSG meeting at India (25-29 January 2010),
3. There is a search team being organized to find a Co-Chair to work with Dr Lettenmaier.
4. The SSG agreed to change the name of CEOP to the GEWEX Hydroclimatology Panel (GHP),
effective immediately following the end of the PGM.
Also a new set of criteria for GEWEX RHPs was proposed at the meeting that were circulated prior to thecall and that should be reviewed by RHPs.
In addition, Benedict voiced that with regards to the changes resulting from the Pan-GEWEX meeting
discussions, the data collecting and reporting scheme may need some restructuring, however the urgent
need for a high quality data as a basis for scientific activities that are key for the GEWEX Imperatives was
confirmed at the meeting and the reference site data activities are supposed to continue in a certain manner.
The in-situ data from the CEOP reference sites were acknowledged and studies based on these data were
presented at the meeting.
From the viewpoint of the data providers, the use of their data – the publications based on these data –should be announced and advertized more effectively. It was felt, that the science within GHP (CEOP)
based on these data needed to be discussed more in detail at dedicated working sessions.
Also it was noted that scientific results produced by RHPs were not as much exploited and referred by
GEWEX as it could be. The feeling was that most of the effort was put in the data development though themain focus of GEWEX is the science.
These recommendations from the RHP representatives were appreciated and will be considered in further
planning of the GHP activities.
(3.1b) It was reiterated that a 10-Year Dataset project had been initiated in response to the climate
modeling community need of a high quality observation data of a sufficient length for evaluation ofclimate models under the CMIP5 project and quantification of model projections uncertainties. This activity
was proposed by the WCRP Observation and Assimilation Panel (WOAP) and is compliant with the CEOP
commitment taken at the 3rd Annual CEOP Meeting in Melbourne in August 2009 to develop the CEOP 10year
dataset
as
well
as
with
the
GEWEX
post
2013
Imperatives(http://www.gewex.org/2010pangewex/Draft_Imperatives.pdf). The WOAP suggested activity is envisioned
as a collaborative effort of a broader observation and climate modeling communities including
GEWEX/CEOP, LandFlux-EVAL, GSWP, AsiaFlux, from the observation side. The targeted dataset willconsists of in-situ as well as satellite observations from multiple providers including GHP (CEOP),FLUXNET, AsiaFlux, iLEAPS.
The 10-Year Dataset project was discussed with the LandFlux-EVAL, FLUXNET, AsiaFlux, and GSWP
representatives at the occasion of the HESSS2 Meeting in Tokyo in June and subsequently a White Paper
was developed and submitted for discussion at the Pan-GEWEX meeting in August (see ATTACHMENT 2).
The activity was accepted as one of the new GHPs efforts. The White Paper is now being discussed with
the CMIP group and the GHP (CEOP) community will be informed of the further development of the activity
in due course. Support from the European sites contributing to CEOP since 2001 is expected.
With regards to the 10-year period, the actual years have not been confirmed yet. In this context, Beyrich
and Bosveld mentioned that processing the data prior 2001 would mean a non-negligible additional effort,
which should be considered when deciding the actual 10-year period. Williams also added that thenomination of sites would be done by an advisory group that is to be formed and that the geographical andclimate aspect of the sites will also be considered together with the completeness of the data record for theselected 10-year period.
(3.1c) It was announced that the 2010 CEOP Special Issue of GEWEX News was published at the
beginning of September and was available for download at:
http://www.gewex.org/2010pangewex/home.html.

3
4.

RHP and Reference Site Reports

4.1 Summary status of the reference site archive at NCAR/EOL(4.1a) Williams and Loehrer provided in advance prior to the call a written summary of the current statusof the CEOP reference site data archive for the Europe-NEESPI-Africa region:
BALTEX Cabauw BALTEX Lindenberg BALTEX Sodankyla -All data now complete through 2008. Awaiting documentation updates.
All data complete through 2008.
SFC/STM/Sonde completed through 2008.
FLX 2005-2008 data submitted, in queue for checking.
TWR awaiting corrected version of 2002-2004 data (dew point problem)

AMMA - no updates
NEESPI - submitted documentation for Fyodorovskoye reference site. Now included on web site:
http://www.eol.ucar.edu/projects/ceop/dm/insitu/sites/neespi/Fyodorovskoye/wetspruce/
At the call, Williams acknowledged that the European sites, in particular the BALTEX ones, had the mostcomplete and up to date datasets of all the CEOP (GHP) group. He also added that the other sites,
including Asian and American ones, had also been submitting the data but in some cases the data release
was delayed due to data quality issues. In addition, the Asian sites are submitting the data through theTokyo Data Center that assures quality standards prior to sending to the Central Data Archive at NCAR.
(4.1b) It was further reiterated that it would be desirable to update the metadata information of individualsites the site representatives were asked to review the information that is available through the DataManagement website at: http://www.eol.ucar.edu/projects/ceop/dm/insitu/sites/ and update it if necessary(action A2).
4.2 HyMeX RHP report by Philippe Drobinski(4.2a) Drobinski mentioned that HyMeX (http://www.hymex.org/) had been approved as an official
GEWEX/GHP RHP by the GEWEX SSG at the Pan-GEWEX Meeting in Seattle. Koudelova and Williams
have action A3 to update the CEOP (GHP) and Data Management website accordingly.
(4.2b) Drobinski reported that the HyMeX had been finalizing implementation plan and was entering
operational period with observational campaigns. HyMeX has also been recognized as the CORDEX
initiative in the Mediterranean region. It will be contributing to the Clivar as well as GEWEX goals, inparticular that of GHP (CEOP) and GLASS through its strong hydrological and land surface modelingactivity.
(4.2c) Regarding the HyMeX reference sites, Drobinski reiterated that the responsible persons hadprovided samples to the NCAR team and had been resolving the remaining data quality issues. They will
begin to deliver the data in the near future. It was proposed and agreed that the site representatives,
namely M. Borga, V. Ducrocq, G. Delrieu, and E. Morin, would be included on the mailing list and invited toparticipate in these calls in future. Koudelova has action A4 to assure the list is properly updated.
Drobinski also advised the group that the HyMeX sites have applied to GPM to become ground validationsites, which may bring installation of additional observation facilities.
(4.2d) Drobinski further reported that the 4th HyMeX Workshop took place in Bologna, Italy in June 2010,at the CRN facilities (http://www.hymex.org/index.php?lang=english&page=workshops) and organized adedicated CEOP session. More than 100 participants attended the workshop and Drobinski acknowledged
participation of the CEOP representatives including S. Williams, G. Tartari, and T. Tamura from UT. The
next, 5th HyMeX Workshop will be held on Menorca island, Spain, 17 – 19 May 2011.
4.3 BALTEX RHP by Hans-Joerg Isemer and Frank Beyrich(4.3a) Isemer advised the group that the Phase 2 of BALTEX would end in 2012 and the plans for theperiod beyond 2012 were under discussion. The project will most probably maintain the focus on energy
and water cycle in the climate system but other foci are still to be clarified – perhaps by the middle of 2011.
(4.3b) The 6th Scientific Conference on BALTEX was held in Poland, in June with the title: Changing
Water, Energy and Biogeochemical Cycles in the Baltic Sea Basin. The conference was organized jointly

4with the NEESPI RHP and several papers related to the CEOP work were presented including the keynote
talk on the BALTEX CEOP reference sites by Frank Beyrich.
(4.3b) Isemer reiterated that the BALTEX Assessment Report on Climate Change was published in 2008
and efforts to publish a revised version of the report had been initiated. The leading committee is now being
prepared that will involve scientists and should stay strictly apolitical. The new report is envisioned to be
published in 2012.
(4.3c) Beyrich also reiterated that the EMS (European Meteorological Society) conference would takeplace in Switzerland 13 – 17 September and would include a session on atmospheric measurement fromlocal to regional scale at which Steve Williams would provide a keynote talk on the CEOP data component.
4.4 BALTEX: Lindenberg by Frank Beyrich
Beyrich reiterated that the Lindenberg datasets through 2008 had been finalized and submitted to the
NCAR archive and were available on-line. The data for 2009 are underway and may be submitted by theend of 2010. Observation continues well and the 2010 data should also be available for the GHP (CEOP)
database.
4.5 BALTEX: Cabauw by Fred Bosveld
Bosveld reiterated that the Cabauw datasets through 2008 had been finalized and submitted to the NCAR
archive and were available on-line. The site documentation update is underway and the work on the 2009
data will begin soon.
Bosveld further voiced that a certain issue has been found in the radiosonde data format that would be
fixed soon. Also a new type of humidity sensors were installed that is supposed to improve the quality ofdata. In addition, efforts are being made to improve soil moisture observation.
4.6 BALTEX: Sodankylä by Esko Kyro – written input
The last dataset (flux data) was submitted on 7/7/2010. Now all the data sets covering years from 2005 to2008 are completed and uploaded. The tower data submitted as early as on 23rd February has not been
uploaded and the team is communicating this problem with the data management group.
There are some problems with earlier tower data (Oct 2002-Dec 2004):
It seems that dew point temperatures are miscalculated. Only 48 m height included. Therefore the Oct
2002-Dec 2004 tower data will be reprocessed with more heights included.
4.7 NEESPI by Pasha Groisman(4.7a) Groisman reported that the documentation for the Fyodorovskoye reference site within NEESPI
had been provided to the data management team and posted on the data management website.
(4.7b) Groisman reiterated that scientists from Belarus and Russia participated in the BALTEX scientificconference presenting roughly 35 papers and acknowledged financial support provided by Germany,
Poland, and Sweden without which the scientists from Belarus and Russia could not attend the event.
(4.7c) An international summer school in Tomsk, Siberia, was organized under the auspices of NEESPI
that would lead to a set of research papers.
4.8 Others: Italy and African sites of the CEOP-HE group by Gianni Tartari Roberta Toffolon(4.8a) Tartari stressed the importance of high quality observation data for any of the water and energy
cycle related scientific activities and acknowledged the CEOP efforts on data integration. He expressed thewillingness of the CEOP-HE associated sites to continue in this effort under the new GHP.
(4.8b) Toffolon reiterated that their reference Italian site included three observation stations located in
Italian mountains (Monte Cino, Monte Cimone, and a glacier station) and was included in the CEOP groupof “Ohters” sites that are not associated with any RHP. The documentation of the stations as well as thedata has been sent to the NCAR archive. The 2009 data of the Mt. Cino station were being finalized.

5(4.8c) Toffolon further voiced that they had received a draft of official letter for including their African site
to the GHP (CEOP) network. When the procedure is finalized, the data will begin to be sent to the GP(CEOP) archive.
4.9 Others: Chilbolton by Charles Wrench
Wrench reported that the Chilbolton site flux radiometer monitoring had been revised, which should
improve the flux measurement. The site description will be provided to the data management group by thetime of the next call. Also, the data format issues have been discussed with the data management group.
The Chilbolton site NetCDF format is not compatible with the CEOP one but possibilities of conversion havebeen investigated.
4.10 AMMA
Benedict informed the group that Dr. Thierry Lebel, AMMA representative for GHP (CEOP), had
responded to the announcements of the call but unfortunately could not participate due to a schedule
conflict.

ATTACHMENT 1 Outcome and prospects from the August 2010 pan-GEWEX and SSG meetings,
Seattle.
6 Sept 2010
Outcome and prospects from the August 2010 pan-GEWEX and SSG meetings, Seattle.
Kevin E Trenberth
GEWEX held a “pan-GEWEX” meeting in Seattle for a week in late August 2010. The “pan-GEWEX” connotationmeans that it was an opportunity for all of the working groups and panels within GEWEX to meet together andexchange views while interacting to formulate future plans. Accordingly, the Scientific Steering Group (SSG) attended
and participated fully, and we took the opportunity to have an SSG meeting after the full meeting closed. In addition, anumber of program managers from different nations attended, and we were fortunate to be able to involve a number ofyoung scientists in the process (see report elsewhere).
This pan-GEWEX meeting was especially eventful owing to a number of challenges before the community informulating plans for the new post-2013 phase of the WCRP, guided by the JSC. In particular, the guidance suggested
that core projects would be retained but with revised responsibilities to facilitate climate system research at the interfaceof the physical Earth system components. The suggested four new core projects should be: 1) Ocean-atmosphere(think CLIVAR); 2) Land-atmosphere (think GEWEX); 3) Cryosphere (think CliC); and 4) Stratosphere-troposphere(think SPARC). Then within each core project there should be a common set of basic “themes” including 1)
Observations and analysis; 2) Model development, evaluation and experiments; 3) Processes and understanding; 4)Applications and services; and 5) Capacity building. Coordination across projects on these themes would be via WCRP
Modeling and Observations Councils.
In preparation for the forthcoming changes, prior to the last JSC meeting, the GEWEX SSG met in January 2010 in
New Delhi and began formulating plans for the future via a new mission statement, a set of imperatives (things thatmust be done), and a set of frontier challenges for the future. The draft set of these was published in the May 2010
GEWEX newsletter as a basis for the pan-GEWEX discussions.
At the January meeting, I had challenged the SSG to say why the three GEWEX panels: Radiation (GRP), Modeling(GMPP), and CEOP should be together. The arguments were strong and convinced me that we should continue withsimilar components in any future GEWEX. Figure 1 illustrates the points from the standpoint of the hydrological cycle,
featuring radiation, atmospheric processes and land surface hydrology and processes. The original motivation for thesebeing together is that they correspond to the “fast” processes in the climate system, and this still applies. Following the
JSC meeting in February, key questions were “how much science falls under land-atmosphere” and “what about thosethat do not?” Accordingly, the approach taken in the pan-GEWEX meeting was that while the future GEWEX should
indeed be the place where land-atmosphere interactions were featured, it should be much more. In particular, it should
retain the global energy and water cycle as a core focus while adding regional aspects. It should indeed also featurehydrological and land surface processes and modeling, and interactions with the atmosphere. However, it should
further retain a strong atmospheric component related to the water and energy cycles, and hence scientific issues
related to radiation, clouds, convection, precipitation, boundary layers, surface fluxes, runoff, and human influences
which should also be included in terms of observations, process understanding and modeling.

6

Fig. 1 depicts the hydrological cycle schematically and thus the driving by radiation and energy, the atmospheric
dynamics that move water and energy around and produce clouds which block the sun, the complex land surface
complete with human influences and the interactions with the atmosphere, and the surface and below surface
processes that complete the water cycle (adapted from Trenberth et al. 2007).
The meeting provided a venue for vigorous discussions of the draft imperatives and the future directions for GEWEX.
Following the meeting, the SSG has decided on the following. 1) While the old GEWEX name was liked by many for its
uniqueness (e.g., in a google search) and name recognition, no-one has come up with a viable alternative for the “EX”
part that is clearly obsolete. Accordingly, the new name post-2013 is suggested to be: “Global and Regional Energy
and Water” (GREW). This has many aspects in common with the old name and the two should be used together for aperiod of time. The revised mission statement is:
To measure and predict global and regional energy and water variations, trends, and extremes (such as heatwaves, floods and droughts), through improved observations and modeling of land, atmosphere and theirinteractions; thereby providing the scientific underpinnings of climate services.
There were strong sentiments for fewer more succinct imperatives, and the following seven have been approved by the
SSG:
Datasets: Foster development of climate data records of atmosphere, water, land, and energy-related
quantities, including metadata and uncertainty estimates.
Analysis: Describe and analyze observed variations, trends and extremes (such as heat waves, floods anddroughts) in water and energy-related quantities.
Processes: Develop approaches to improve process-level understanding of energy and water cycles in supportof improved land and atmosphere models.
Modeling: Improve global and regional simulations and predictions of precipitation, clouds, and landhydrology, and thus the entire climate system, through accelerated development of models of the land andatmosphere.
Applications: Attribute causes of variability, trends and extremes, and determine the predictability of energy
and water cycles on global and regional bases in collaboration with the wider WCRP community.
Technology transfer: Develop diagnostic tools and methods, new observations, models, data management, andother research products for multiple uses and transition to operational applications in partnership with climate
and hydro-meteorological service providers.
Capacity building: Promote and foster capacity building through training of scientists and outreach to the user
community.
The header in each case highlights the link between the imperative and the themes outlined by the JSC. There is stillmuch to be done to flesh out these imperatives with more details about what they mean in terms of the actions to betaken, the lead groups in GEWEX and interactions with other parts of WCRP, and the other organizations involved.
Modeling
Prior to the pan-GEWEX meeting, extensive discussions had been held by email that set the stage for the discussions
in Seattle. These arose in particular from a desire for the chair of GMPP (Christian Jakob) to step down and a proposal
to remove the layer of GMPP, as well as the need to address the future structure of GEWEX and GEWEX modelingpost-2013. The many questions and statements that arose were summarized as a series of questions, mostly related tomodeling, that were appended to the pan-GEWEX meeting agenda. Based on those discussions, I offered some
proposals for how this may move forward that turn out to be similar to those adopted.

7
The proposal of removing the GMPP layer between GCSS, GABLS and GLASS with the SSG met with strong approval.
Instead GCSS/GABLS will be combined and, along with GLASS, will report to and take advice from the SSG directly.
This proposal was subsequently approved by the SSG.
As a consequence of the removal of the GMPP layer there is a need for GCSS/GABLS to undergo somereorganization. This will also pave the way for the post-2013 transition. As a result of the discussions it was proposedthat GCSS abandons its current Working Group structure. Instead, the group will operate through projects. Those canbe initiated by any member of the community. A Science Steering Committee (SSC), which will form the GCSS/GABLS
Panel, will be responsible for the successful running of the program. This includes the approval of proposals as well as
engagement with the community to explore new opportunities. The GABLS activities will be fully integrated into thisstructure through GABLS-specific projects as well as GABLS membership on the SSC. The GCSS and GABLS brandnames will be maintained. This proposal was also subsequently approved by the SSG.
Most of the discussion in the group was about the extension of the current atmospheric model development activities in
the post-2013 structure. This resulted in the proposal for a Framework for Atmospheric Model Enhancement(FAME). The mission of FAME is proposed as: Improving the representation of physical and dynamical processes inthe troposphere in models for all purposes and especially weather and climate services. Its main focus would be theimprovement of the representation of clouds and precipitation in atmospheric models, which can only be achieved by
improving our understanding of the intricate coupling of physical and dynamical processes associated with clouds andprecipitation at various scales.
FAME was proposed in recognition of need expressed by the IPCC in several reports which highlighted the significant
shortcomings in models in the simulation of clouds and precipitation with consequences for the simulation of important
climate feedbacks and climate sensitivity. Other important factors included the recent revolution in the ability to observe
clouds and precipitation, especially from space, and improvements in ability to model the processes involved at theprocess-scale. The experience of more than 15 years of the GCSS program and almost 10 years of the GABLS
program makes the time right for a more concerted effort in atmospheric model improvement that builds on the existing
strengths and adds to them the important new research area of physics-dynamics coupling.
The envisaged ingredients of FAME would be programs on the PBL (GABLS), clouds, convection and precipitation(GCSS), radiation (currently residing in GRP and SPARC), coupling to dynamical processes (new) and potentially also
coupling to numerics (new). FAME will be built around the core approaches identified by the WCRP JSC, e.g.,observations, modeling, data analysis and model diagnosis, and process studies. Through the direct involvement ofoperational modeling centers in FAME as well as through the engagement of scientists throughout the world, theactivities in FAME will make major contributions to capacity building and services.
As FAME is tightly focused on providing a means for the improvement of the representation of core physical processes
in atmospheric models, it will partner with many other programs to contribute to the research on phenomena that go
beyond the physics-dynamics coupling in the atmosphere. Those include partnerships with the land (e.g., GLASS,
GHP), ocean (e.g., CLIVAR), aerosol (e.g., ACPC, iLEAPS), atmospheric chemistry (e.g., SPARC, IGAC), stratosphere(e.g., SPARC), and cryosphere (e.g., CliC) communities. Necessarily, these go well beyond GEWEX alone.
FAME could be seen as a natural extension to the existing GCSS/GABLS panel described above, if the post-2013
GEWEX structure still allows for such an activity. This would maintain continuity, provide close links to the land andlimited area modeling communities and ensure FAME’s natural focus on the energy and water cycles. These activities
were originally grouped together to provide a focus on relatively “fast processes” as compared with those involving theocean or cryosphere. FAME could also make a major contribution to a potential cross-WCRP effort on atmosphericmodel development.
This proposal was subsequently discussed by the SSG who strongly recommend keeping FAME within the post-2013
GEWEX structure. Questions include how FAME goes forward, whether as a panel or working group. Many of theother modeling activities in WCRP come under working groups. WGSIP is an example where the WG reports to the
CLIVAR SSG but acts on behalf of the WCRP to deal with seasonal to interannual prediction. A new group, integrating
FAME and possibly called WGAP, short for WG on Atmospheric Processes and modeling for climate, could operate
similarly within the new post-2013 GEWEX. However, as the activities relate to the established WGs, especially
WGNE, this aspect is yet to be decided after broad consultation with the community.
Land surface and hydrological science
Major changes were also underway in the realm of the regional hydrological projects at the pan-GEWEX meeting. In
part these came about naturally from the evolution of the program, and given extra nudge by the change in leadership.
Under the leadership of Toshio Koike, CEOP developed an impressive and extensive program, including the Regional
Hydrometeorological Programs (RHPs), associated modeling and data base development, and the Hydrologic
Applications Project (HAP). CEOP remains at the core of the GEWEX mission, includes more than a thousand
researchers, and provides important regional data, modeling and a valuable end-user interface.
The brief history is that the Continental Scale Experiment (CSE) concept was developed in the 1990s. Its purpose was
the development, diagnosis, and testing of coupled land-atmosphere models with a focus on water and energy budget
closure at near-continental scales. An example was the GEWEX Continental Scale International Project (GCIP) for theMississippi basin as a well instrumented and analyzed region. This led in turn to the development of RHPs to extend
this concept to other regions: MAGS, BALTEX, GAME, LBA, AMMA; and even more recent RHPs, see Figure 2. The

8panel set up to provide coordination and oversight was the GEWEX Hydrometeorological Panel (GHP). Then to takeadvantage of many new satellite and other observations the Coordinated Enhanced Observing Period (CEOP) was
begun in 1995 and continued into the second phase of GEWEX for 2001-2006. This activity, which also developed
extensive data management activities, led by Toshio Koike in Japan, also led to some similar panels to those in GHP
and some duplication of effort. Accordingly, this first CEOP activity was combined with GHP and evolved to become
the Coordinated Energy and Water Cycle Observations Project with the same acronym, CEOP, in 2007-2008. The
initial observing period grew to become a move to produce a 10 year dataset and archive especially set up for theregional projects. However, other developments had already occurred in observations and data management, whichsuggested the activity should be wrapped up and refocused, even as it is utilized and hopefully becomes part of theheritage of GEWEX. In particular, the development of the many flux towers around the globe provide alternatives to the
CEOP reference sites for local studies of energy, water and biogeochemistry.
Accordingly, the community began what might be called a “back to basics” movement, with recognition of the need toreinvigorate the regional hydrological projects. In particular there was a call by the new co-chair, Dennis Lettenmaeir,for stronger hydrological activities which would foster the next generation of hydrologically realistic land surface
schemes and provide a home for projects like PILPS. The recommendation to the SSG was along these lines and thus
a new GEWEX Hydroclimatology Panel (GHP: note the change in the name from the first version) has been formed toreplace CEOP, effective immediately. The SSG also followed up on the recommendation from CEOP to approve a new
RHP called the HYdrological cycle in the Mediterranean Experiment (HyMeX), focused on the 20 countries around theMediterranean Sea and the fresh water and salinity of the Sea itself.
GHP is thus the home for hydrologic science and modeling within WCRP and there is considerable scope fordevelopments in this area, e.g. in seasonal forecasting, the detection and attribution of change, and the development
and analysis of climate projections. Challenges remain in dealing with monsoons and to help coordinate the multitude ofnational initiatives in this area. There are also opportunities for linkage with GLASS in bringing disciplines together inthe development of next generation Land Surface Models as well as increasing interactions with CORDEX. Changes in
the management structure are likely to accompany the new consolidation of efforts as GHP realizes its considerable
potential.

Fig. 2: The GEWEX RHPs as of 2008(??).
GEWEX Datasets
The original GEWEX datasets were developed under the auspices of the GEWEX Radiation Panel (GRP) which
continues, but is also looking for a name change as it does a lot more than radiation. It does deal with all of the global
satellite data related to energy and water and their synthesis into products, and is currently leading and promoting
reprocessing of the datasets with a goal of creating climate data records of sufficient quality to be useful for examining
trends. Some of the datasets, such as GPCP and ISCCP, are well known and already used extensively, but thescientists are confident that they can be made much better and more consistent with each other, and with better
estimates of uncertainties.
In general GRP is working well toward the new goals and has produced simulators, that take into account the sampling
and characteristics (such as thresholds) of the observations to enable intercomparisons of satellite products with model
data. Interactions with other parts of GEWEX were fostered by the pan-GEWEX meeting, and the GEWEX datasets

9
have potential for great use in evaluating and improving models on issues such as clouds and indirect effects ofaerosols, precipitation frequency, intensity and amount, and in providing the context for the RHPs.
Extremes
The recent summer record breaking flooding in Pakistan, India and China, and heat-waves and wildfires in Russia
highlight the extremes of the hydrological cycle of drought and floods that are changing from human activities. Dealing
with extremes in WCRP is a cross-cutting activity that involves all projects although GEWEX plays a leading role. Olga
Zolina, who is a member of the GEWEX SSG, led the WCRP extremes workshop involving some 150 people at
UNESCO in late September. Breakout groups were held on issues of 1) data requirements and availability (such as
the need for hourly precipitation data to properly characterize extremes); 2) representation of extremes in models,
including scaling and spatial issues (how station data relate to grid squares, comparing apples to apples); and 3)
methodologies for estimating extremes across areas and disciplines, including statistical methods. Continuing issues
are sorting out the human changes in extremes and how to best communicate with the general public on such technicalattribution issues.
For instance, it is likely that the southeast Asian floods and the Russian drought were linked by the monsoonal
circulation and teleconnections linked to the anomalous latent heating of the atmosphere associated with the heavy
rains. The pattern of the rains was related to the rapidly developing La Niña but the previous El Niño had left behind aresidue of abnormally high sea surface temperatures in the Indonesian-northern Indian Ocean region that provided anenhanced supply of moisture to the monsoon rains. No doubt those elevated temperatures have a global warming
component. The persistent “blocking high” over Russia led to drought that was no doubt more intense and longer
lasting owing to global warming, with increased risk of heat waves and wild fires. While these connections are very
likely, they are hard to prove as models do not reproduce monsoon rains very well, and blocking is poorly simulated.
These scientific challenges extend across the WCRP.
Closing remarks
The above is but a sample of the goings on and developments from the pan-GEWEX meeting. What I have tried to dois provide a sense that we are looking forward to the future with considerable excitement at the science we can achievethrough collaboration and friendly competition, with the help of coordination through GEWEX and, in the future, GREW.
I would like to thank all of those who attended and participated.

ATTACHMENT 2
Whitepaper on 10-year dataset development(Draft ver. 0.2, 23 July 2010)
1. Background
Climate change poses a fundamental threat to the well-being of the people all over the world. This threat encompasses
security in water, food, energy and health. Climate change is not hypothetical, and its impacts are already evident, asboth scientific observations and the experiences of the region’s inhabitants confirm. And in confronting the risks andchallenges posed by changing climate, we must acknowledge the fundamental uncertainty in our projections of futureclimatic and water resources conditions, and work to improve our ability to identify effective responses while reducing
this uncertainty.
2. Mission
To reduce the uncertainty, a simple framework to identify, organize and disseminate comprehensive, quality and longterm observational datasets should be provided to modeling communities, e.g. Coupled Model Intercomparison Project
phase 5 (CMIP5), and analysis and impact study research groups.
In response to this need, the 10-year dataset project (Project) aims to develop a high-quality comprehensive dataset of
meteorological and hydrological variables for a selected 10-year period based on most advanced and complex land
reference sites distributed over the world and complemented with relevant satellite observations. The targeted dataset
will be “homogeneous” across data providers and individual sites, i.e. of a standardized format, fulfilling high quality
requirements in accordance with CEOP standards, and equipped with appropriate metadata assuring fullinteroperability and “easy” use.
In this way, the Project mission is in concert with the GEWEX Post 2013 Mission Statement and Imperatives. It
responds to the imperative to develop climate data records of atmospheric and land variables, complete with metadata
and error bars, in particular through development of appropriate calibration/validation/evaluation datasets to confront
models. The Project will build on the CEOP experience in data management, archival and access, while devising robust
ways of dealing with the more diverse, complex, higher spatial and temporal resolution, and much greater volumes ofdata.
The targeted dataset contribution

10
1. Climate studies
Evaluation of the climate model output applicability for climate change impact assessment (CMIP5).
2. Societal needs
Quantification of uncertainties of model predictions/projections and thus making the model output information useablefor decision and policy makers.
3. Scientific community
The dataset will also be usable for scientific community to further advance research into energy and water cycle
processes. It will contribute to several GEWEX imperatives focusing on analysis and model development andimprovement. These include:- Increase understanding of energy and water cycle processes, quantify their contribution to climate feedbacks, anddevelop improved hydrometeorological parameterizations.
- Accelerate developments in models of the land, atmosphere, and entire climate system:o Continue evaluation of developing earth system model products.
o Develop archives to support model development and intercomparison.
- Attribute causes of trends, and determine the predictability of energy and water cycles on a global and regional
basis in collaboration with the wider WCRP community.
o Coordinate data set generation, process studies, and modelling- Diagnose model errors and exploit GEWEX datasets and focused process studies.
3. Objectives(i) To develop dataset that will be directly usable for evaluation of climate model outputs, i.e. will cover various
regions/climate conditions over the world, will allow for deriving climatologically sensible mean diurnal cycles (sufficient
length of observations), and will be convenient for use (format, metadata, easy access, QC-ed).
(ii) Complement in-situ observations with satellite data to provide spatial coverage of observed variables consistent tothe scale of climate models.
(iii) Use the dataset for quantification of uncertainties of CMIP5 climate model projections and producing usable
information for decision and policy makers.
(iv) To assure an easy access to the data for a wide community through a user-friendly on-line system – Date
Integration and Analysis System (DIAS), that provides a set of data analysis, integration and visualization tools, free ofcharge.
(v) Through a timely accomplishment of the above – to contribute to the IPCC AR5.
4. Merit-

real observational datacomprehensiveness of the dataset in terms of:o Spatial coverage – contributing sites will be nominated considering also their location with intention tocover as many regions and climatic conditions as possible. 2D, 2.5D and 3D sites will be preferred(sites including more stations assuring spatial coverage of observations and also those containing
PBL towers as well as soil observations).
o Temporal coverage – sites covering the targeted 10-year period will be selectedo Variables – most advanced sites with complex observations will be preferredo Data sources – reference site data will be complemented with satellite observations for square areasof 250km x 250 km around the sites-

unified, standardized format
consistency in terms of observed parameters – also consistent with model outputs following NetCDF CF
conventions
interoperability – standardized metadata
accessibility – DIAS-

The targeted dataset has advantages over “reanalysis” datasets by providing (a) observational data and by (b) enablinga single commodity that includes all data in a standardized format and (c) the gap that exists between observed
parameters such as rainfall versus reanalysis values for example.
5. End Users(i) CMIP5 project – climate model output evaluation

11
CMIP5 promotes a standard set of model simulations (Taylor et al., 2009) in order to:
1. evaluate how realistic the models are in simulating the recent past,
2. provide projections of future climate change on two time scales, near term (out to about 2035) and long term(out to 2100 and beyond), and
3. understand some of the factors responsible for differences in model projections, including quantifying somekey feedbacks such as those involving clouds and the carbon cycle
Under the CMIP5 strategy there are two distinct foci of the model experiments: 1) near-term simulations (10- to 30years) and 2) long-term (century time-scale) simulations initialized from the end of freely evolving simulations of thehistorical period. In addition, CMIP5 also admit so-called “time-slice” experiments that involve simulations with unusuallyhigh resolution atmospheric models or models with more complete treatments of atmospheric chemistry.
There are two core near-term CMIP5 experiments, one a set of 10 year hindcasts or predictions initialized from climate
states in the years 1960, 1965, 1970, and every five years to 2005, with this last simulation representing the sole actual
prediction beyond the present (i.e., beyond 2009). In these 10-year simulations, it will be possible to assess model skill
in forecasting climate change on time-scales when the initial climate state may exert some influence. The other coreexperiment extends the 10-year simulations initialized in 1960, 1980, and 2005 by an additional 20 years. It is at thissomewhat longer timescale that the external forcing from increasing GHGs should become more important. “Time-slice”
experiments fall into the CMIP5 near-term “Tier 1” group of experiments including both the present-day (AMIP period:
1979 - at least 2008) and the future (specifically, the decade 2026-2035) simulations and offer opportunities to (forexample) to:•
explore the implications of running climate models at high resolution,•
examine the regional effects of climate change at small scales where impacts are felt,•
study the air quality implications of climate change with models that include sophisticated treatments ofatmospheric chemistry, and•obtain more robust statistics characterizing changes in climate, in particular the likelihood of rare or extreme
events.
The temporal resolution of the model output is 3 hours and the spatial resolution is 60 km in almost all models
participating in the near-term experiments and as fine as 20 km in some models in the time-slice experiments.
The targeted 10-year dataset will be applicable for evaluation of the CMIP5 near-term and time-slice experiment
simulations. The 10-year period dataset is sufficient to derive climatologically sensible mean diurnal cycles, it is alsouseable for analyzing intra-seasonal variability or extreme events under the current climate. On the other hand, it is not
sufficient for analyzing inter-seasonal variability and evaluation of the CMIP5 long-term simulations.
It is proposed that evaluation and intercomparison studies are done in a collaborative manner between the modelinggroup (CMIP5) and relevant science groups who have experiences in carrying out similar studies in specific fields. For
example, the LandFlux-EVAL group will focus on the evapotranspiration fluxes assessment, the GSWP groups will
focus on soil moisture, etc.
(ii) IPCC AR5 – climate model output uncertainties quantification
To be specified(iii) Wider modeling community for model validations, developing improved parameterizations
To be specified(iv) Wider science community - local to regional to global energy and water cycle research
To be specified

6. Technical details
Data to be included- Data providers: FLUXNET, CEOP, GCOS, satellite data
- Number of sites to contribute – CEOP, FLUXNET groups will nominate the best candidates: FLUXNET “Golden
sites”, CEOP sites contributing since the beginning of CEOP Phase 1. Suitability of a site will be assessed based on
its compliance with prioritized characteristics. The value/priority of consistency of data versus full decade availability,
versus geographic distribution versus other related characteristics is to be discussed and confirmed.
- Comprehensive dataset covering energy and water budgets is targeted that will be useable for multiple purposes andthus the providers will be asked to provide as many parameters as possible. Basic requirements for CMIP5 are givenin the CMIP5 simulation protocol (Taylor et al. 2008).
- Data period is to be discussed and decided. There are two views: (i) some reference sites may have difficulties toprovide/process most recent data and may prefer earlier period, e.g.: 1998 – 2007, while (ii) other reference sites
data and satellite data may not be available for that period yet (MODIS data from 2000).

12Data processing, submission, and archiving
Each data provider will provide data in the required format and quality and will equip them with appropriate metadata.
The data and metadata formats will be based on/adopted from CEOP.
Data will be archived at the Data Integration and Analysis System at the University of Tokyo, Japan (DIAS), the data
integration, analysis, and dissemination system that was launched in 2006 as part of the Earth Observation and ocean
Exploration System and that is based on the CEOP scheme. CMIP5 Gateway function in cooperation with PCMDI(CMIP5 Leader)
Data Policy
Data use policy is adopted from the CEOP Reference Site and Satellite Data Release and Use Guidelines and adjusted
to the specifics of the 10-YDP project. The full text of the 10-YDP Data Release and Use Guidelines is provided inAppendix A.
7. Implementation
The Project is a collaborative effort among observing and modeling communities primarily involving GEWEX (CEOP,
GRP, GMPP), FLUXNET, CMIP5, CEOS, WOAP, GCOS,… others?
Coordination will be lead by the CEOP International Coordination Function, regular teleconferences and workshops will
be held.
Implementation Steps
1. Whitepaper and implementation plan drafting – Project mission, objectives, plan…definition; discussion at the PanGEWEX meeting.
2. Data format, data policy and processing details agreement
3. Nomination of the “First Track” sites, roughly 30 sites (15 FLUXNET, 15 CEOP).
4. Test datasets submission, check for consistency with agreed-to format led by CEOP reference site data archiving
function, NCAR EOL.
5. Full submission of data from the First Track Sites to DIAS -> QC, Metadata -> using the data in preliminary studies– showing possibilities/advantages of such dataset
6. GCOS sites nomination followed by data submission, further CEOP, FLUXNET sites (Second Track Sites) -> QC,
Metadata
7. Generation of satellite products for the selected reference sites.
8. Dataset fully opened

8. Schedule2010
10 July:
14 July:
22 July:
28 July:
31 July:
20 August:
23 – 27 August:
4 September:
30 September:
30 December:
2011
30 March:
May-June:
20 June:30 September:
November-December

Whitepaper preliminary draft
First conf. call
2nd draft of WP
2nd conf. call
3rd draft of WP -> provide to wider community
Wide communities input -> Pan-GEWEX meeting
discussion at Pan-GEWEX meeting
3rd conf. call -> final draft
Tentative Implementation PlanFirst Track Data (FTD) Loading Due
QC, Format, Meta Data
FTDS Open
1st Workshop
Second Track Data Loading Due
QC, Format, Meta Data
STDS Open
2nd Workshop

9. References
Taylor, Karl E., Ronald J. Stouffer, and Gerald A. Meehl: A Summary of the CMIP5 Experiment Design, 2009.
(http://cmip-pcmdi.llnl.gov/cmip5/docs/Taylor_CMIP5_design.pdf)

Appendix A
Executive Summary

Data Release and Use Guidelines13
All data users are strongly requested to follow these data release guidelines that are adopted from the CoordinatedEnergy and Water Cycle Observation Project (CEOP) Reference Site Data Release Guidelines(http://www.eol.ucar.edu/projects/ceop/dm/documents/ceop_policy.html) and the CEOP Satellite Data Release
Guidelines (http://monsoon.t.u-tokyo.ac.jp/ceop2/satellite/guideline-info.html). The following six "golden rules" for asmooth and successful use of 10-YDP Data should particularly be noted and followed by any data user.
1. No financial implications are involved for the 10 Year Dataset Project (10-YDP) data exchange.
2. Commercial use and exploitation of 10-YDP data is prohibited.
3. Any re-export or transfer of the original data received from the 10-YDP archive to a third party is prohibited.
4. The origin of 10-YDP data being used for publication of scientific results must be acknowledged and referenced in
the publication.
5. 10-YDP data users are strongly encouraged to establish direct contact with data providers for complete interpretation
and analysis of data for publication purposes.
6. Co-authorship of data users and 10-YDP Principle Investigators on papers making extensive use of 10-YDP data isjustifiable and highly recommended.
1. INTRODUCTION
The 10 Year Dataset Project was initiated as an international effort in 2010 by the World Climate Research Programme(WCRP) Observation and Assimilation Panel (WOAP) and the WCRP Global Energy and Water Cycle Experiment(GEWEX) and involves several projects, initiatives, organizations and agencies who committed to provide theirobservation reference sites and/or satellite data per agreed to rules defined in this Whitepaper above. 10-YDP satellite
data providers also comply to the CEOS satellite data exchange principles for research (http://monsoon.t.utokyo.ac.jp/ceop/policy1.html) and the CEOS data principles for operational environmental data (http://monsoon.t.utokyo.ac.jp/ceop/policy2.html).
The time periods for which data will be archived will cover the (to be decided).
Archiving all 10-YDP data into one central archive, namely DIAS at the University of Tokyo, and creating harmonizeddata formats is an essential element of the 10-YDP data policy in order to provide easy access to the data for thetargeted communities. The latter will be referred to as data users in the following data release guidelines.
10-YDP contributing reference sites have been established and are being maintained by a variety of institutions,organizations, national services, international and national research groups, and research individuals. Henceforth, theseand the national and international space agencies providing satellite data will be referred to as data providers.
Maintaining continuous, high-quality measurements, performing quality and error checking procedures, and submitting
data and related documentation to DIAS requires substantial financial and logistical efforts of the data providers. The
necessary support for these activities originate from a variety of international, national and institutional sources.
2. 10-YDP DATA RELEASE AND DISSEMINATION GUIDELINES
2.1 Free and unrestricted Release of Data
The no-restriction principle shall in particular mean that no financial implications are involved for the 10-YDP dataexchange. 10-YDP data providers shall transfer their measured data to the DIAS free of charge. Also, 10-YDP data files
established at the DIAS shall be offered free of charge to 10-YDP data users.
2.2 No Commercial Use or Exploitation
It is understood that all 10-YDP data shall be delivered to data users only for research and scientific purposes compliant
with the objectives described in the 10-YDP Whitepaper. Commercial use and exploitation by neither the data users nor
the DIAS is prohibited, unless specific permission has been obtained from the data providers concerned in writing.
2.3 No Data Transfer to Third Parties
One restriction which will be imposed on all data users concerns the re-export or transfer of the original data (asreceived from the DIAS archive) to a third party. Such restriction shall apply to all categories of 10-YDP data, and is in
the best interests of both the data providers and the potential users. Unrestricted copying of the original data by
multiple, independent users may lead to errors in the data and loss of identity of its data provider-DIAS origin and isstrictly prohibited.
DIAS will offer 10-YDP data files to potential data users through electronic means, (e.g. the internet). The DIAS shallinstall technical means to keep protocol on all data transfers to data users thus maintaining a catalogue of all data
users, and the data files they have obtained.
2.4 Acknowledgement and Citation
Whenever 10-YDP data distributed by DIAS are being used for publication of scientific results, the data's origin must be
acknowledged and referenced. A minimum requirement is to reference 10-YDP (or particular project/database (CEOP,FLUXNET/AsiaFlux…)?) and DIAS. If only data from one data provider/source/project? or a limited number of reference

14sites has been used, additional acknowledgement to the data provider/source/project? or reference site(s) and its (their)
maintaining institutions or organizations shall be given.
Maintaining continuous, high-quality measurements, performing quality and error checking procedures, and submitting
data and related documentation to the DIAS will require substantial financial and logistical efforts of the data providers.
The necessary support for these activities originate from a variety of international, national and institutional sources.
The DIAS shall make proper reference to all 10-YDP data providers and, if required, to their funding sources.
2.5 Co-operation between 10-YDP Data Users and Principal Investigators (PIs) at the 10-YDP Data Providers
Data users of 10-YDP data are encouraged to establish direct contact with PIs at data providers for the purpose ofcomplete interpretation and analysis of data for publication purposes.
2.6 Co-Authorship for 10-YDP Principal Investigators (PIs)
Co-authorship of 10-YDP PIs on papers making extensive use of 10-YDP data is justifiable and highly recommended, inparticular, if a PI has responded to questions raised about the data's quality and/or suitability for the specific study inquestion, or has been involved in directly contributing to the paper in other ways. It is highly recommended that any
data user should contact the responsible PI and ask him/her if he/she wants to become co-author, or if an
acknowledgement (see section 2.4) would be sufficient. If co-authorship is requested, the PI and the data user should
establish a basis for collaboration. A PI in this context means the responsible site or instrument scientist or any person(student, collaborator) that he/she may suggest.
2.7 CEOP Publication Library
Whenever 10-YDP data distributed by DIAS are being used for publication of scientific results, the author(s) shall sent a
copy of the respective publication, preferably in electronic form, to the DIAS (or 10-YDP point of contact?) in order tobuild up a 10-YDP publication library. DIAS (or 10-YDP?) will maintain this library and will make it public, for example
via DIAS (or 10-YDP?) web site, for a continuous monitoring of the 10-YDP data applications and 10-YDP's
achievements in general.