Summary of Main Deliberations at the Sixth International Implementation Planning Meetingfor the Coordinated Enhanced Observing Period (CEOP) (12-14 March 2007 IN THE USA
National Academy OF Sciences (NAS) Building, Washington D.C., USA) (see:http://www.ceop.net).

BACKGROUND FirstThe initial successes of CEOP, up to the end of 2004, had led its Science Steering
Committee and Advisory and Oversight Committee to endorse plans for a second phase of CEOP
that would have extended to the end of 2010. CEOP Phase 2 was formulated and has been
guided by formal Science and Implementation Plans and involves a number of technical andscience driven working groups that were reviewed and received direction and oversight from a
Science Steering Committee and an Advisory and Oversight Committee. With the demonstrated
uniqueness of CEOP Phase 1 and advent of CEOP Phase 2, which was to extend the time periodof enhanced observations and enhance the science agenda, it was clear that CEOP would
contribute to the scientific objectives of GEWEX and integrated data management activities of
WCRP on a longer time period than initially anticipated.
The GEWEX Science Steering Committee (SSG) along with the WCRP Joint ScientificCommittee (JSC) had each noted that CEOP was heavily entrained into the activities that havebeen undertaken by the GEWEX Hydrometeorology Panel (GHP). CEOP has especially taken
advantage of the GEWEX Continental-Scale Experiments (CSEs), which have been assisting
GEWEX to demonstrate skill in predicting variability in water resources and soil moisture on timescales up to seasonal and annual as an element of WCRP's prediction goals for the climate
system.
As a result of this close collaboration and in order to preclude any perceived or real
overlap of efforts, GEWEX, in full agreement with the GHP, and with CEOP, has decided tomerge GHP and CEOP to form a new entity, designated the “Coordinated Energy and water cycle
Observations Project (CEOP)”. This formal merger is meant to enhance the efforts of both GHP
and CEOP and will not lose sight of any of the GHP strategic goals or any of the ongoing GHP
science work since the same scientists and more are already working on closely related projects
and goals in the former CEOP. It does mean, however, a refocusing of the former GEWEX CSE
and GHP agendas toward the new Coordinated Energy and water cycle Observations Project(CEOP). This decision has also been supported by the broader WCRP climate researchcommunity.
In this context, the main themes of the Sixth CEOP International Implementation Planning
Meeting were:
I. Assessment of the former CEOP Phase 1 accomplishments.
II. Introduction of the framework of the new GHP/CEOP merged activity, which will consist of thefollowing elements:
Science Initiatives including work based on- the Regional Hydroclimate Projects (RHPs), which were formerly designated the Continental
Scale Experiments (CSEs);- Cross RHP Studies such as Monsoons, Cold regions, Semi-arid regions, High-altitude, Tropics,etc.;- Global Projects associated with data climatologies;- Cross-cutting/enabling sciences such as Analyses and Budget studies, Modeling at all scales,
satellite and data assimilation, isotopes, aerosols, extremes, hydrologic applications, etc.; and1

Data Infrastructure including data at all scales including sites, river basin, RHP, regional (morethan one RHP), and global- In-situ: NCAR/EOL- Global Data Centers: GRDC, GPCC, IAEA, GRP, BSRN
- Modeling: MPI- Satellite and Integration: UT
III. Outline Task Plan for Update/Development of CEOP Implementation/Science Plan
IV. CEOP Contributions to WCRP/GEWEX Goals and Objectives i.e. GEWEX “Roadmap”
PART I - ASSESSMENT OF THE FORMER CEOP PHASE 1 ACCOMPLISHMENTS
Since the Fifth Implementation Planning Meeting (see body of this report), CEOP has madeprogress in further development of the two sets of unique functional components that have been
established during CEOP Phase 1. The presentations at the Sixth Implementation Planning
Meeting, therefore, included the status of progress toward further development and application of:••components to integrate observations based on coordination among field science groups,
space agencies, and numerical weather prediction centers in the local, regional and global
scales;components required to exchange and disseminate observational data and information
including data management that encompasses functions such as Quality
Assessment/Quality Control, access to data, and archiving of data, data integration andvisualization, and information fusion.

The key achievements reported included a substantial increase of the volume of data stored
in the respective CEOP archives for the Phase 1 Enhanced Observing Periods EOP-1, EOP-3,
EOP-4, i.e. in-situ archive at the National Center for Atmospheric Research (Colorado, USA;
http://www.eol.ucar.edu/projects/ceop/dm/); model output archive at the Max-Planck Institute(Hamburg, Germany; http://cera-www.dkrz.de/CERA/cera2browser_CEOP/index.html); and thesatellite data archive at University of Tokyo, Japan at: http://monsoon.t.u-tokyo.ac.jp/ceopdc/ceop-dc_top.htm). A major portion of the expected data for CEOP Phase 1 has already been
uploaded and is available through the on-line data archives and data integration systems. The
amount of data at each center is continually being up dated. Snap shots of the amounts of data
have already been presented in the body of this report, but more accurate up to date information
can befound at the Web pages referenced in this paragraph.
It was reported at the meeting that significant progress has been made in development of the
CEOP Data Integration Services, namely the Distributed Data Integration System(http://jaxa.ceos.org/wtf_ceop/) and the Centralized Data Integration System (http://monsoon.t.utokyo.ac.jp/ceop-dc/ceop-dc_top.htm). Both systems are being regularly updated to reflectprogress in data submission to CEOP. Moreover, new capabilities have been and are being
developed and included on the systems to provide users with a wide range of functions of data
retrieval, visualization and analysis and also to allow for compatibility with other relevant data
portals.
Significant advances within CEOP of satellite, and ground-based remote sensing and in-situ
observations data management and coordination with strong connections to the climate modelingcommunity provided an excellent opportunity for the development of national and a growing
number of international programs to assess the impact of aerosols on radiation, clouds and theirinteraction with the Asian summer monsoon at a CEOP Co-sponsored Workshop on that topic
held in Xining Qinghai Province, China from 31 July to 4 August 2006.
During the meeting it was also reported that besides following its normal schedule of regularinternational conference calls and Newsletter publications, CEOP has also begun a funded CEOP

2

Analyses Intercomparison Project and had a CEOP IPY proposal accepted in cooperation with
the CliC core Project.
PART II - INTRODUCTION OF THE FRAMEWORK OF THE NEW GHP/CEOP MERGEDACTIVITY
It was announced at the meeting that GEWEX, in full agreement with the GEWEXHydrometeorological Panel (GHP), and with the Coordinated Enhanced Observing Period ‘CEOP’,
had decided to merge GHP and ‘CEOP’ to form a new entity, designated the “CoordinatedEnergy and water cycle Observations Project (CEOP)”. This formal merger was described tobe accomplished inorder to enhance the efforts of both GHP and ‘CEOP’ and will not lose sight ofany of the GHP strategic goals or any of the ongoing GHP science work since the same scientists
and more are already working on closely related projects and goals in ‘CEOP’. It does mean,
however, a refocusing of the former GEWEX CSE and GHP agendas toward the new
Coordinated Energy and water cycle Observations Project (CEOP). The generalized
structure in an overview format is shown on Figure 1 of Appendix A. From the GEWEX
perspective the specific structure is as shown in the Figure C-1 below.

Figure C-1- New CEOP Framework within the GEWEX Panel/Project context
The tone for new directions in the new CEOP framework was established by further outliningof the current baseline and by a review of issues and recommendations that had been made atprevious meetings and taken up by the CEOP community. These included:(i) CEOP will take extra efforts to underwrite its current level of success in development of
its in situ model and satellite datasets. In particular it will articulate and implement a clear
strategy for finalizing collection of its Phase 1 in-situ and satellite datasets, each of which
continues to show numerous gaps. This strategy will also be made functional under the new3

CEOP/GHP merged organizational structure, whereby CEOP will continue timely data collection
at all reference sites; production of model products at all contributing NWP centers; andexploitation of all relevant operational and experimental satellite instrument data in a coordinatedmanner.
(ii) In the context of its data collection process the newly constituted CEOP will continue its
relationship with data archive Centers at UCAR, MPI and JAXA/UT. CEOP will work to ensurethat Funding for these efforts will be maintained and that the centers will work together to ensure
the synergy of the three data types is maintained into the future.
(iii) In the future the new CEOP will remove any confusion about its unique contribution toclimate research. The questions and dialog about its unique nature has lead to a clearer
expression of it being science driven versus science enabling. It is important for scientists to be
involved in data related activities to ensure the value of the resultant products to the broader
community. CEOP does not, therefore, necessarily have to be about establishing an integrated
data system, even though that might be an outcome of the implementation of the uniquecoordinated data management scheme it has fostered.
(iv) CEOP in its new framework will work to further clarify it function/status in WCRP.
Connections with other core projects such as CliC and CLIVAR and oversight by groups such as
the JSC/WOAP will result in conclusions about its unique structure and range of interactions
among and between multi-disciplinary scientists/groups and various technical and data
management experts/centers. Such a new unifying configuration should result in CEOP
continuing to be a collaborating Project within WCRP.
(v) CEOP in its new framework will contine to evolve as a relevant aspect of the initialconfiguration of GEO/GEOSS. The new CEOP will relate to GEO in a positive manner but the
specific ways this will be accomplished needs to be fully explored and explicitly explained in the
future.
(vi) It is valid and appropriate for CEOP in its new configuration to expand its science scope
and from material incorporated into its Implementation/Science Plan the new work on
extremes/teleconnections; aerosols and water cycle; watershed hydrology as science issues andthe extension/enhancement of data collection and analyses into cold and semi-arid regions is tobe part of CEOP’s future vision.
(vii) In the context of a clarification of its unique contribution to climate research CEOP will
want to revisit its role and position in WCRP to the point of it being established as a special
coordinating Project in WCRP.
These concepts/recommendations for future action and direction of the new CEOP lead tofurther efforts to clarify CEOP within the context of GEWEX, WCRP and the broader IGOS, GEO
communities.
As noted CEOP is now led by two Co-Chairs. The CEOP Co-Chairs agreed that the main
issue to be addressed in the new CEOP framework is the connection between the science anddata components of the Coordinated Enhanced Observing Period and the GEWEX Continental
Scale Experiments (CSE’s), in the new Coordinated Energy and Water Cycle Observation Project.
It was announced at the meeting that the GEWEX SSG approved changing the name of GEWEXCSE to GEWEX Regional Hydroclimate Projects (RHPs) as had been recommened in themerger whitepaper provided in Appendix A of this report.
This development led the Co-Chairs to adjust the overall configuration of the new CEOP togive a clearer picture of the interaction between the work that had existed within the GHP CSEs
and the various elements of the Coordinated Enhanced Observing Period. The outcome of thesedeliberations are shown in the two figures C-2 and C-3below:

4GEOSS

HAP

S
CC

Space
Agencies

&

Mo
de
ls

NWP

RF
DM

QuickTime™ and adecompressor
are needed to see this picture.

Global Projects
Figure C-2: Overview of new CEOP Framework

cts
e
j
o

A

Pr

Pr
f
o
ct high-websejo

NWPCs/ACs
NCEP,JMA
ECPC,BoM
UKMO,CMC
ECMWF
CPTEC
NCMWF
EPSON METGMAO GLDAS

Global Model
Regional Modelcoldmonsoonelevation

H
A
P

crosscutting

semi-arid

aerosol

isotopeextremeLand Surface Model/LDAS
WDC-C
MPI-M

GlobalDatasetProjects

Societal
Benefits

Reference
Sites

NCAR/EOL

UT&JAXARiver basins

DATA INTEGRATION & ANALYSIS
Centralized System
U. Tokyo

Distributed System
WTF-CEOP

Satellite
data
CEOS
JAXA
NASA
ESA
NOAA
EUMETSAT
WGISS
WGCV

Figure C-3: Schematic Diagram of the New CEOP Framework
Part IIa Introduction/Configuration of Merged Science and Data Initiatives

5The work being undertaken as a precursor to CEOP Phase 2, as presented at the CEOP
2006 International Implementation Planning meeting, and the plan and schedule for the kick-off
and implementation of Phase 2 that was scheduled to begin in 2007 emphasized the extension ofexisting data and observation processes and greater stress on the research and analysis
components of the Coordinated Enhanced Observing Period, providing for CEOP to meet its
commitments to CEOS/IGOS-P Water Theme, WCRP and GEOSS. With the merger between
GHP and the Coordinated Enhanced Observing Period it was agreed at the meeting that it was
still necessary for each of the “Phase 2” initiatives to be maintained under the CoordinatedEnergy and Water Cycle Observation Project so that the Co-Chairs of the new CEOP and thelead persons of each Working Group needed to agree to accept the action to advanced that workin 2006-2007 including:(i) The emphasis on the diurnal cycle as a unifying scientific theme;(ii) Plans to continue with a watershed hydrology component;(iii) Contributions towards, examination of some inter-connectivity between land areas;(iv) To embark on a Worldwide Integrated Study of Extremes (WISE);(v) To undertake a joint initiative with the WCRP Climate and Cryoshpere CEOP/CliC project
and the International Polar Year (IPY);(vi) To exploit CEOP reference sites located in semi-arid regions;(vii) To augment and formalize the CEOP international coordination function
The results of the work in these areas up to the time of the meeting was presented by the
CEOP Co-Chair Prof Toshio Koike. The Table below updated to the time of the meetingsummarizes these accomplishments.
Criteria for measuring CEOP Progress
Data
Management

WESP

CIMS

Satellite

Project
Management

Technical Requirements, P, I, F (Planned, Initiating, Functioning)
Scientific Requirements B, Pr, C (Beginning, Progressing, Completed)

Reference Site Composite Data ArchiveF

35 Reference Sites, EOP-1:completed, EOP-3/4:on-going
1 paper in Special Issue.

Model Output ArchiveF

11 centers, 6 papers in Special Issue.

Satellite Products ArchiveF

TMI,PR, SSM/I, GLI, AMSR, AMSR-E, GMS: completed
AVHRR, AMSU, AIRS, MODIS, ASAR, MERIS : on-going

Interoperability Arrangement

F

Workshop on SMeta Data Design and Implementation, GCMD portal,
1 paper in Special Issue.

Distributed Data Integration System

F

Open in June, 2005, 1 paper in Special Issue.

Centralized Data Integration System

F

Open in June, 2005, 2 papers in Special Issue.

Water and Energy BudgetPr

Model Output Validation by NWP CentersPr

10 papers in Special Issue.
1 Workshops (Irvine)
GLDAS Product: 1d, 1/4d, 1km

GLDAS

Pr

GHP/CEOP Model Transferability StudyPr

Model Inter-comparison StudyPr

Monsoon Intercomparison StudyPr

Diurnal, Intraseasonal and Seasonal Variability

Pr

Monsoon Process Study by Using Models

Pr

Impacts of Local & Remote Forcings on Monsoon

B

3 Workshops and 9 CEOP sessions of symposia and conferences
2 refereed papers
6 papers in Special Issue.

Algorithm Development and ValidationPr

Soil moisture, Snow, 2 papers Special Issue

Satellite Data Assimilation for Land Hydrology

Pr

Soil moisture, Snow, Surface fluxes, 2 papers in Special Issue

Establishment of Direct Links and Connections

F

Reference Sites, NWPCs, Space Agencies

CEOP Meetings

F

Implementation Planning Meeting 5(6), Workshops, Tele-Conf.

Scientific Conferences

F

AGU:3(4), AOGS:1(2), AMS:1

Levy Actions/Milestorne Documentation andTracking

F

Working Groups, ICB, Phase 2 IP submitted to SSG and JSC

NewsletterF

Twice a Year (1-10)

As the means for unifying these results and to address the need to perpetuate and push
this work forward within the merged GHP/CEOP framework breakout groups were convened to6explore the connections and assess the most efficient means for establishment of links between
the components of the Coordinated Enhanced Observing Period and the former CSEs.
The Chairs and Correspondents of the Breakout Sessions organized their groups torespond to the following topics:(i) Milestones/Results remaining in Phase 1(ii) Overall Objectives for new CEOP activities(iii) Milestones to be achieved within the following 2–3 years and proposed implementation steps(iv) Connections/Joint activities with other Projects, in particular GMPP, GRP and core projects of
WCRP
The four groups met in parallel sessions and addressed the above issues in the context
of the main components of the new CEOP framework. These elements were identified asfollows:
Regional Hydroclimate Projects (H-Y Isemer, C. Fu)
AMMA/BALTEX/CPPA/MAHASRI/MDB/NEESPI/LBA/LPB
COLD/MONSOON/SEMIARID/HIGH-ELEVATION
Crosscutting Studies (R. Stewart)
WEBS/WISE/SWING/AEROSOLS
Models (M. Bosilovich)
Global/Regional/Land/HAP
Data (S. Williams, F. Toussaint)
In situ, (Basins/Model/Satellite/Data Integration), Global Data Centers
Following their deliberations the conveners of the groups presented the outcome of their
discussions during a plenary session. The individual presentations are available upon requestfrom the Tokyo International CEOP Office (TICO) through email request to the Office Manager
Ms Akiko Goda at: goda@hydra.t.u-tokyo.ac.jp.
However, as a means for providing a level of consistancy that could lead to a concise
means of expanding the conclusions of the groups into elements for updating the CEOP
Implementation/Science Plan the CEOP Co-Chair Prof T. Koike developed an implementation
Matrix that he developed by noting each science topic and each data handling item that was
mentioned during the discussion sessions where action or interaction between or among theworking groups within the new CEOP framework was mentioned specifically in the context of“needs” or “requirements” of one group upon another.
This approach enables the subsequently crafted matrix to become a touchstone for
identifying where needs exist that are being met and where more work or definition ofrequirements and explanation of interactions must still be defined.
It was agreed, therefore, that the matrix would serve as the basis for an
expansion/updateoftheexisting
CoordinatedEnhanced
Observing
PeriodImplementation/Science Plan. Such and expansion or updated would, therefore, result in what
would be considered the Implemenation/Science Plan of the new CEOP “Project of Projects”.

The matrix is provided in the figure (C-4) below:

7

CEOP coordination assessment overview

Figure C-4: CEOP Coordination/Assessment Overview Matrix
PART III - OUTLINE TASK PLAN
IMPLEMENTATION/SCIENCE PLANFOR

UPDATE/DEVELOPMENT

OF

CEOP

It was decided at the meeting there was a need to specifiy the individuals currently
working within the framework of the new CEOP. As a result Dr John Roads, Co-Chair of CEOP
accepted the action to develop a CEOP “roster”. His preliminary listing is shown in Figure C-5:
Working
Group Leads
and* DraftingTeam
members

NAME
Toshiio Koike
John Roads
GEWEX RHPs
Jin HuangJose Marengo
Hugo Berbery
Hans-Jorg Isemer
Amandou Gaye
Jun Matsumoto
Helen CleughPasha Groisman
Global Data Centers
Thomas Maurer
Tobias Fuch
Regional Foci
Congbin Fu
T. Ohata
Jun Matsumoto,Tartare, Perotto
Cross Cutting Studies
Kun Yang
Ron Stewart?
Bill Lau
ModelsMike Bosilovich
Matt Rodell
Burkhardt Rockel
Ray Arrit
Hydrologic Applications
Eric Wood
Data Management
Steve Williams
Michael Lautenshager?
Ken McDonald
Toshihiro Nemoto

FUNCTIONCEOP co-chair (data integration)*
CEOP co-chair (hydroclimate science)*
Hans Jorg Isemer*
CPPA
LBA
LPB
BALTEXAMMA
MAHASRIMDBNEESPI
GRDC
GPCC
Congbin Fu*
SAS
CRS
Monsoons
High Elevation
Ron Stewart*
WEBS
Extremes
Isotopes
Aerosols
Mike Bosilovich*
Global
GLDAS
ICTS
SIEVE
Eric Wood
HAP
Steve Williams*
Reference Sites/Basins
Model Output
Satellite Data
CEOP Data Integration & Dissemination
Central Data Integration

Figure C-5: CEOP Preliminary “Roster” of Active Participants8It was decided that from the larger listing a smaller team of lead persons could be
identified (see names in Figure C-5 identified by an “*”) to undertake to organize the community
within their purview of responsibility and to obtain and unifiy inputs from that community that could
become components of the new CEOP Implementation/Science Plan.
This new team was subsequently identified as the CEOP Team for Tracking andIntegrating of Group Responsibilities (TIGR). An initial International conference call of the TIGR
was subsequently organized and it was agreed at that time that the TIGR members would begin
the process of updating the existing Coordinated Enhanced Observing Period
Implemenation/Science Plan and formatting the result into the new CEOP Implemenation/Science
Plan.
This work is to proceed through a five step process using the CEOP
Coordination/Assessment Overview Matrix shown in Figure C-4 above as the basis for this work.
A graphic representation of the steps to be taken are identified on the matrix itself in Figure C-5.

CEOP coordination assessment overview

A

ts
ec
j
o
Pr
f
to
c
e
oj
Pr

1. Review this table.
2. Identify possible cooperative
targets from YOUR side.
3. Share the up-dated table.
4. Seek and design possible higherlevel coordination.
5. Input the cooperative components
into the new CEOP
Implementation/Science plan.

Figure C-5: Five step process for applying the CEOP Coordination/Assessment Overview Matrix
toward the development of the new CEOP Implementatiion/Science Plan, by the CEOP TIGR.
It was subsequently decided that the CEOP TIGR would operate according to thefollowing schedule:(i) a reporting template would be agreed upon by the end of March 2007;(ii) all inputs from each component obtained and consistently formatted by 30 April 2007;(iii) Second International TIGR conference call to be held on 1 May 2007;(iv) Group sections reviewed and updated internally by 15 May 2007;(v) Groups interchange sections for cooperative/coordinated review to be completed by 15 June
2007;(vi) Final review and formatting to be accomplished by 1 July 2007.

9

PART IV - CEOP CONTRIBUTIONS TO WCRP/GEWEX GOALS AND OBJECTIVES: THE
GEWEX “ROADMAP”
As a separate exercise the participants and group leaders were asked to discuss andreport, through a second round of breakout sessions, what the specific issues were that wereassociated with their concrete implementation strategies and related contributions that would beconsistent with future WCRP/GEWEX plans as especially contained in the GEWEX “Roadmap”,
that had been developed and distributed to all participants before the meeting.
The groups were again organized into the same four topic areas, namely, Regional
Hydroclimate Projects; Crosscutting Studies; Models; and Data.
The Chairs andCorrespondents organized their groups to respond to what they will contribute for each year
(2007–2012) to:
GEWEX Objective 1:
Produce consistent research quality data sets complete with error descriptions of the Earth's
energy budget and water cycle and their variability and trends on interannual to decadal timescales, for use in climate system analysis and model development and evaluation.
GEWEX Objective 2:
Enhance the understanding of and quantify how energy and water cycle processes contribute toclimate feedbacks.
GEWEX Objective 3:
Improve the predictive capability for key water and energy cycle variables and feedbacks throughimproved parameterizations to better represent hydrometeorological processes, and determine
the geographical and seasonal characteristics of their predictability over land areas
GEWEX Objective 4:
Undertake joint activities with operational hydrometeorological services, related ESSP projects
like the GWSP, and hydrological research programs to demonstrate the value of GEWEX
research, data sets and tools for assessing the consequences of climate predictions and globalchange for water resources.
Regional Hydroclimate Projects Contributions to GEWEX Roadmap Breakout Session
This group was chaired by Drs Berbery and Huang. The outcome of their deliberations
were distilled from inputs made by each of GEWEX RHP’s. The results are summarized here:
GEWEX Objective 1:“Produce consistent research quality data sets complete with error descriptions of the Earth's
energy budget and water cycle and their variability and trends on interannual to decadal timescales, for use in climate system analysis and model development and evaluation.”
2007-2009:
Complete first regional analysis of the water and energy cycle with existing products
Diagnosis of causes of variations and trends of regional energy and water cycles (fromweather to decadal scales)
2008-2010:
Promote regional observations as part of GCOS for the regional energy and water cycle
studies
GEWEX Objective 2:“Enhance the understanding of and quantify how energy and water cycle processes
contribute to climate feedbacks.”

10

2008-2009:
Conduct field experiments to understand regional hydrometeorological processes (e.g., LPB,
MAHASRI, CPPA)
2008-2010:
Develop information on floods and droughts for the specific RHPs and assessment of the roleof land-atmosphere interactions.
2007-2010
Carry diagnostic and modeling studies of land surface-atmosphere interactions feedbacks
GEWEX Objective 3:“Improve the predictive capability for key water and energy cycle variables and feedbacks
through improved parameterizations to better represent hydrometeorological processes, anddetermine the geographical and seasonal characteristics of their predictability over land
areas”
2008-2011:
Improvement of the applicability of the prediction models for key water energy and water
cycle variables and feedbacks
Develop land surface datasets to be employed for validation and assimilation into regionaland global models to improve their predictive skill.
GEWEX Objective 4:“Undertake joint activities with operational hydrometeorological services, related ESSP
projects like the GWSP, and hydrological research programs to demonstrate the value of
GEWEX research, data sets and tools for assessing the consequences of climate predictions
and global change for water resources.”
2010-2012:
Launch pilot projects in RHPs that will utilize hydrological ensemble prediction
Downscale and evaluate seasonal hindcasts over the RHPs
Assist the role of remote sensing to improve regional hydrological modelingContribute to assessing past, present and future hydroclimate variability and change andcontribute to detection, attribution and vulnerability studies at the regional scales.
Establish collaborations with GWSP to develop assessments of availability of water
resources based on climate projections for the 21st century
Evaluate the role of land cover/land use changes on the regional system’s climate andhydrology
Crosscutting Studies Contributions to GEWEX Roadmap Breakout Session
This group was chaired by Dr Berbery. The outcome of the group’s deliberations weredistilled from inputs made by each of the CEOP Crosscut initiatives including: WEBS/WISE;
Semi-arid region/Cold region/High elevation, but not SWING or Aerosols studies, which were notrepresented at the meeting. The results of these discussions are summarized here:

11

GEWEX Objective 1:
•
•
•
•
•
•

Convergence of observation and data integration in cold regions (cold region)
Derive long-term SWE and soil moisture by satellite (SSM/I) and/or ground based
measurement (cold region).
Develop long-term measurements of water, energy, aerosols in mountainous areas (highelevation)
Develop high resolution datasets to create state-of-the-art precipitation forecasting (highelevation)
Evaluate satellite products of precipitation and surface radiation and energy budget withreference data (WEBS)
2008: develop an inventory of floods and droughts and the role of land-atmosphere
feedbacks in causing those events (WISE)

Mountain/High Altitude Initiative (MHAI)GEWEX Objective 2:
•

•

•
•

•
•

Evaluate global water cycle using model intercomparison and parameterization sensitivity
experiments (WEBS)– Land-surface, convective, and boundary layer schemes– Diurnal ◊ Interannual variability
Identify and focus on regions where water cycle simulation has trouble (WEBS)– Overlap with semi-arid and cold region studies– Identify remotely-sensed datasets that will be useful
Examine the vertical profiles of water cycle exchanges throughout column and theirtemporal variability (WEBS);
2008-2010: Regional hydroclimate hotspot studies in Tibet, including surface andatmospheric water and energy budget, its relation with extreme events in East Asia
(WEBS)
2010: Provide an assessment of the role of land –atmosphere interactions during
extremely wet and dry (drought) period (WISE);
Understanding the water and energy cycles of semi-arid regions and their role in climate
system by globally integrated analysis of CEOP reference sites data, satellite
observations and model outputs (semi-arid);

12

•
•
•

Impacts of dust aerosols on hydrological cycle and climate at regional and global scales(semi-arid; aerosols);
Inter-comparison of cold region large rivers (Lena, Obi, Yenisey, Mackenzie), theirtemporal changes, and possible relation with regional warming (cold region);
Glacial process studies (cold region; high elevation).

GEWEX Objective 3:
•

•
•

•

•
•

2007-2008: Apply CEOP-based inter-comparison study and identify model deficiencies insimulating diurnal, seasonal, and annual precipitation pattern and water and energy
budget using CEOP phase 1 (WEBS);
Evaluate LSMs’ ability in semi-arid and cold regions and improve their performances(semi-arid; cold region);
Improvement of parameterization of land surface process for semi-arid region to becoupled in climate models, with particularly a new scheme of eco-hydrological process(semi-arid);
Apply current existed RCMs for semi-arid region simulation and identify their problems.
Assist in better prediction of climate and water resources and their management in semiarid regions where the shortage of water supply is crucial (semi-arid);
High mountain hydrology including glaciers, interactions between vegetation and frozen
ground and snow process (cold region);High resolution precipitation modelling in complex topography (high elevation).

GEWEX Objective 4:• Assess the ability of models to simulate the impacts of heavy rain events and droughts onwater resources (WISE)• Provide high-resolution precipitation forecast for hydrological extreme studies (Highelevation).
• Based on data inter-comparisons, recommend model and satellite data for hydrometeorological applications (WEBS)
Models Contributions to GEWEX Roadmap Breakout Session
This group was chaired by Dr Bosilovich The outcome of the group’s deliberations weredistilled from inputs made by each of the CEOP Modeling Groups including: Global, Regional,
Land and Hydrological Applications (HAP). The results of these discussions are summarized
here:
GEWEX Objective 1:•

2007: Complete the quality control, production and distribution of the CEOP Phase I data
sets. (CEOP)

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Documentation and verification of model data sets at the CEOP model data archive for
global data (atmosphere and land)
cut-off date for delivering phase 1 model data to model archive
Documentation and verification of model data sets at the CEOP model data archive forregional model data from ICTS

2007: 1980-2010 dataset: Request CEOP gather from NWP centers what their global
reanalysis, land only global reanalysis, and re-forecast/hindcast plans are.
2008: Ensemble of CEOP Phase 1 monthly means and standard deviation (cross cutting toe.g. GRP radiation products)
Common Data Format

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GEWEX Objective 2:•

2008: Develop an inventory of floods and droughts and the role of land-atmosphere
feedbacks in causing those events. (CEOP, GRP)••

Inventory how regional models simulate flood and drought characteristics using
CEOP observations and ICTS simulations

2010: Provide an assessment of the role of land-atmosphere interactions during
extremely wet and extremely dry (drought) periods. (CEOP)•

Importance of specification and parameterization of vegetation in simulating wet
and dry periods using CEOP observations and ICTS simulations.

GEWEX Objective 3:•

2007: Start development of ground water parameterizations for regional to global
scale models•

2009: Promote the use of remotely-sensed data and develop related products tostudy the role of soil moisture in land atmosphere interactions. (GMPP, CEOP)••

Implement data assimilation algorithms for soil moisture in uncoupled andcoupled data assimilations systems

2012: Demonstrate the contribution of improved prediction systems for forecasting
the onset and intensity of droughts and the recovery from drought. (CEOP)•

NWPs in CEOP will execute re-forecast experiments to demonstrate whether
physical parameterization improvements that emerged from CEOP
intercomparisons of GCMs with reference sites and satellite observations
yielded improved predictions of hydrological significants events like doughts andfloods and monsoons. (needs re-wording)

GEWEX Objective 4:•

2007: Launch at least two pilot projects in GEWEX CSEs that will utilize hydrologicalensemble prediction techniques as a HAP and HEPEX initiative. (CEOP)••

2007: Downscale and evaluate seasonal hindcasts over the CSEs using NOAA andDEMETER seasonal forecasts that can be assessed by CSE scientists (CEOP)••

Launch downscaling studies in CPPA seasonal hindcast experiment2008: Develop links with THORPEX to undertake predictions on daily to monthly time scales
to look at intra-seasonal prediction capabilities. (CEOP)••

CPPA launching a pilot project to demonstrate multi-model ensemble hydrologicalprediction (streamflow, snow pack, soil moisture) on medium range (1-2 weeks) andseasonal time scales.

In CPPA pilot project launched in 2007 links are going to be created between CPPA and
THORPEX for the inter-seasonal prediction range

2009: Evaluate seasonal hydrological forecasts from hindcast studies for the initial two pilot
studies; and launch additional HAP and HEPEX pilot studies. (CEOP)•

from the CPPA pilot project launched in 2007 (see above)

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Data Contributions to GEWEX Roadmap Breakout Session
This group was chaired by Drs Williams and Toussaint. The outcome of the group’s
deliberations were distilled from inputs made by each of the CEOP Data Handling\ Groups
including: NCAR, MPIM and UT. This group used a format which was based on milestones over
the requested periods covered by the GEWEX objectives, namely 2007 and 2008 and beyond.
This was considered to fit better with the plans for this activity within CEOP as a contribution to
the GEWEX roadmap. The results of these discussions are summarized here in the group’s
selected format:
CEOP Milestones for 2007
1. Finalize reference sites, additional parameters (e.g. aerosol, clouds,…)– >> Do you satisfy Phase-1 data archive ? If no, please provide us your requests.
2. Finalize MOLTS points and formats
3. Finalize Model Output Data structures
4. Guidance on how to quantify and present error and uncertainty– >> “uncertainty” in GEWEX objectives means such as data accuracy.
5. Finalize phase1 archive
Milestones for 2008 and beyond
1. Establish linkages to other projects (e.g. BSRN, flux net) .
2. Investigate common data access or data converters to integrate data.
SUMMARY
It was concluded at the meeting that CEOP is making important progress towards therealization of its long-term guiding scientific goal: "To understand and model the influence ofcontinental hydroclimate processes on the predictability of global atmospheric circulation andchanges in water resources, with a particular focus on the heat source and sink regions that driveand modify the climate system and anomalies." By making progress toward this goal CEOP is
responding to the challenges and priorities that relate to variations in the earth’s water and energy
budgets and the cycling rate of the hydrological cycle as posed by the International Panel on
Climate Change (IPCC) and will contribute to the development of WCRP COPES and the GEO,GEOSS.
The Co-Chairs of CEOP with the CEOP Working Group Leaders and members andespecially with the support of the CEOP Team for Integrating Group Responsibilities (TIGR);
have the action to take the results and recommendations stemming from the deliberations by all
the participants at the Sixth International CEOP Implementation Planning Meeting and integratethem into a coherent strategy for the Project to meet its goals and to formulate that strategy into aconsistent format for publication as the CEOP Implementation/Science Plan by the time of thenext CEOP meeting due to take place during the period 5-7 September 2007, at Bali, Indonesia.

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