GEWEX is a Core Project of WCRP on Global Energy and Water Exchanges

Vol. 27 No. 3, August 20172018 GEWEX Extremes and Water
Science Conference on the Edge

Canmore, Alberta, Canada
6-11 May 2018

Details on Page 2

Abstracts Due 18 December 2017www.gewexevents.org/events/2018conferenceContents
2018 GEWEX Conference Call for Abstracts

2

AGU Hydrology Section Student
Subcommittee (H3S) Plans for Fall Meeting

4

Former GEWEX SSG Co-Chair Receiving
AGU Medal

4

A New Vision for GEWEX Global Atmospheric
System Studies (GASS) Panel

4

Meeting/Workshop Reports- GLASS Panel Meeting6- 4th HESSS Conference on Climate Extremes
and Global Energy, Water and Carbon Cycles

9- 10th HyMeX Workshop

10

GEWEX/WCRP Calendar

12

2018 GEWEX SCIENCE CONFERENCE l Extremes and Water on the Edge						

Canmore, Alberta, Canada
6–11 May 2018

Call for Abstracts
The 2018 GEWEX Science Conference is structured around the challenges confronting our ability to understand and predict changes in climate
extremes and the availability of fresh water, considering the complex factors of natural variability, forced climate change due to human activities,
and management practices such as dams, reservoirs, land cover changes
and agricultural management. The Conference will reflect research activities that advance the main themes of the GEWEX Project and of the two
World Climate Research Programme Grand Challenges on “Weather andClimate Extremes” and “Water for the Food Baskets of the World.” Abstracts are welcomed on the following themes.

Conference Themes (and Associated Sessions)
1. Nexus of Water, Energy and Food
• Open session (1)• Regional hydroclimate projects (2)• Evapotranspiration determination (3)• Advances in irrigation hydrology and its impact on the water cycle (5)• Water cycle over breadbaskets: cities, agriculture and environment (11)• Human-climate water nexus, climate change and water security (13)• Droughts in present and future climate (20)
• Soils in water and climate models (22)• High-resolution modeling and resolved/permitted convection (25)

2. Climate Extremes• Open session (1)• Regional hydroclimate projects (2)• Understanding subdaily rainfall extremes and the diurnal cycle ofprecipitation (4)• Modeling for extremes (8)• Satellite observations for climate extremes, water cycle processes
and land-climate interactions (12)• Heatwaves in present and future climate (16)• Addressing the challenge of compound events (18)
• Detection and attribution of climate extremes (19)• Droughts in present and future climate (20)
• Climate extremes, ecosystems and society: impacts, feedbacks andemergent risks (21)• High-resolution modeling and resolved/permitted convection (25)• Documenting extremes (26)

3. Extreme Weather• Open session (1)• Understanding subdaily rainfall extremes and the diurnal cycle ofprecipitation (4)• Changes in rainfall intensity and distribution in time and space andtheir effect on surface water partitioning (6)• Modeling for extremes (8)• Heatwaves in present and future climate (16)
• Storms and high-impact weather (17)• Addressing the challenge of compound events (18)
• Land-atmosphere interactions and climate predictability, including
subseasonal to seasonal (23)• High-resolution modeling and resolved/permitted convection (25)• Documenting extremes (26)

4. Atmospheric Modeling and Observations• Open session (1)• Regional hydroclimate projects (2)2

4. Atmospheric Modeling and Observations (continued)• Evapotranspiration determination (3)• Understanding subdaily rainfall extremes and the diurnal cycle ofprecipitation (4)• Changes in rainfall intensity and distribution in time and space andtheir effect on surface water partitioning (6)• Global energy and water cycles, clouds and radiation (10)• Storms and high-impact weather (17)• Droughts in present and future climate (20)
• Land-atmosphere interactions and climate predictability, including
subseasonal to seasonal (23)• Benchmarking and metrics (24)• High-resolution modeling and resolved/permitted convection (25)

5. Land Modeling and Observations• Open session (1)• Regional hydroclimate projects (2)• Evapotranspiration determination (3)• Advances in irrigation hydrology and its impact on the water cycle (5)• Changes in rainfall intensity and distribution in time and space, andtheir effect on surface water partitioning (6)• Water cycle over breadbaskets: cities, agriculture and environment (11)• Satellite observations for climate extremes, water cycle processes,
and land-climate interactions (12)• Droughts in present and future climate (20)
• Climate extremes, ecosystems and society: impacts, feedbacks andemergent risks (21)
• Soils in water and climate models (22)
• Land-atmosphere interactions and climate predictability, including
subseasonal to seasonal (23)• Benchmarking and metrics (24)• High-resolution modeling and resolved/permitted convection (25)

6. Mountain and High-Latitude Hydrology• Open session (1)• Regional hydroclimate projects (2)• Understanding subdaily rainfall extremes and the diurnal cycle ofprecipitation (4)• Changes in rainfall intensity and distribution in time and space andtheir effect on surface water partitioning (6)• Cold regions Earth systems change, including precipitation occurring
near 0°C (7)• The mountain water cycle (14)• Land-atmosphere interactions and water cycle over the third poleregion (15)• Benchmarking and metrics (24)• High-resolution modeling and resolved/permitted convection (25)

7. Global Energy and Water Cycles• Open session (1)• Evapotranspiration determination (3)• Advances in irrigation hydrology and irrigation impact on water cycle (5)• Energy and water budget closure and advances in assessment
techniques (9)• Global energy and water cycles, clouds and radiation (10)• Water cycle over breadbaskets: cities, agriculture and environment (11)• Satellite observations for climate extremes, water cycle processes
and land-climate interactions (12)• Droughts in present and future climate (20)• High-resolution modeling and resolved/permitted convection (25)

August 2017

Conference Sessions
The following are the titles of the sessions. Detailed descriptions of eachsession are available on the Conference website.
1. Open Session on Water and Extremes Research

Conveners: Graeme Stephens, Sonia Seneviratne and Peter van Oevelen

2. Regional Hydroclimate Projects

Conveners: Philippe Drobinsky, Jason Evans, Brian Golding, Branka
Ivancan-Picek and Howard Wheater

3. Evapotranspiration Determination

Conveners: Helen Cleugh, Joan Cuxart, Pierre Gentine and Jan Polcher

4. Understanding Subdaily Rainfall Extremes and the Diurnal Cycleof Precipitation
Conveners: Andrea Flossmann, Hayley Fowler, Elizabeth Lewis andNathalie Schaller

5. Advances in Irrigation Hydrology and Water Management:
Measurements, Modeling and Multi-Scale Impacts

Conveners: Hyungjun Kim, Patricia M. Lawston, Joseph Santanello and
Wim Thiery

6. Changes in Rainfall Intensity and Distribution in Time and Spaceand Their Effect on Surface Water Partitioning
Conveners: Gianpaolo Balsamo, Eleanor Blyth, Aaron Boone and Remko
Uijlenhoet

7. Cold Regions Earth Systems Change, Including Precipitation
Occurring Near 0°C
Conveners: Pavel Groisman, Gerhard Krinner, Ronald Stewart andHoward Wheater

8. Modeling for Extremes

18. Addressing the Challenge of Compound Events

Conveners: Amir AghaKouchak, Bart van den Hurk, Seth Westra andJakob Zscheischler

19. Detection and Attribution of Climate Extremes
Conveners: Friederike Otto, Michael Wehner and Xuebin Zhang

20. Droughts in Present and Future Climate

Conveners: Christel Prudhomme, Sonia Seneviratne, Jacob Schewe andJustin Sheffield

21. Climate Extremes, Ecosystems and Society: Impacts, Feedbacks
and Emergent Risks
Conveners: Markus Reichstein, Jana Sillmann and Dáithí Stone

22. Soils in Water and Climate Models

Conveners: Dani Or, Harry Vereecken and Anne Verhoef

23. Land-Atmosphere Interactions and Climate Predictability,
Including Subseasonal to Seasonal (S2S)
Conveners: Paul Dirmeyer, Michael Ek and Xubin Zeng

24. Benchmarking and Metrics

Conveners: Gab Abramovitz, David Lawrence and James Randerson

25. High-Resolution Modeling and Resolved/Permitted Convection
Conveners: Elizabeth Kendon, Daniel Klocke, Nicole van Lipzig andAndreas Prein

26. Documenting Extremes

Conveners: Lisa Alexander, Ali Behrangi, Lukas Gudmundsson and Albert
Klein Tank

Submission of Abstracts

Conveners: Gabi Hegeri, Andrew Pitman and Robert Vautard

9. Energy and Water Budget Closure and Advances in Assessment
Techniques

Submitted abstracts will be used to select presentations for poster andoral sessions. Poster sessions will be the main form of presentation during
the Conference and a limited number of oral presentations will be given.

10. Global Energy and Water Cycles, Clouds and Radiation

Only one abstract may be submitted per registrant. An abstract should
contain a minimum of 500 words, up to a maximum of 1000 words.

Conveners: Tristan L’Ecuyer, Karina von Schuckmann and Kevin Trenberth
Conveners: Rémy Roca, Graeme Stephens and Claudia Stubenrauch

11. Water Cycle over the Breadbaskets: Cities, Agriculture andEnvironment
Conveners: Richard Harding, Taikan Oki and Yoshihide Wada

12. Satellite Observations for Climate Extremes, Water Cycle
Processes and Land-Climate Interactions
Conveners: Nick Rayner, Matthew Rodell and Christopher Taylor

13. The Human-Climate Water Nexus, Climate Change and Water
Security
Conveners: Katja Frieler, Carole Dalin, Anil Mishra and Jan Polcher

14. The Mountain Water Cycle

Conveners: Chris DeBeer, John Pomeroy and Roy Rasmussen

15. Land-Atmosphere Interactions and Water Cycle over the Third
Pole Region

There is a nonrefundable fee of 80 Canadian dollars ($80 CAD) to submit an abstract. This is separate from the Conference registration fee.
Abstract fees are refundable only if your abstract is rejected. There is norefund for abstracts withdrawn after acceptance. To register for the Conference or submit an abstract, please see the conference website.

Important Dates
15 October 2017:18 December 2017:15 January 2018:22 January 2018:
1 February 2018:

Registration and abstract submission opens
Abstracts due
Abstract acceptance notification
Travel support notification
Early bird registration closes

All participants, including invited speakers and conveners, must register.

Conveners: Aili Ailikun, Xin Li, Bob Su, Yongkang Xue and Tandong Yao

16. Heatwaves in Present and Future Climate

Conference Website

17. Storms and High-Impact Weather

www.gewexevents.org/events/2018conference

Conveners: Frédérique Cheruy, Erich Fischer and Francis Zwiers

Conveners: Michael Kunz, Olivia Romppainen-Martius and Paolo Ruti

August 20173

AGU Hydrology Section Student
Subcommittee (H3S) Plans for Fall Meeting
With less than four months to go until the American Geophysical Union (AGU) Fall Meeting on 11–15 December
2017 in New Orleans, H3S is shifting into a higher gear toprepare several activities for the meeting.
For now, we have three workshops in the pipeline and one
Town Hall in collaboration with the Water Resources Research(WRR) Journal. Our workshops will focus on cultural differences, career track options after graduation and the connections between science, private industry and policy-making.
The Town Hall in collaboration with the WRR Journal will address the question of quality in reviewing and publishing andhow to get the word out about your own research. Throughout
the conference we will be organizing a scavenger hunt with
new questions or challenges every day and exciting prizes. This
year, we will have four pop-up sessions as alternative format
lightning–style talks:• 5th Annual Water Sciences Pop-Up• Productive Stupidity: Movement Towards a Growth
Mindset in Graduate Research• Cultural Responses to Global Change• A Scientist’s Place: Redefining the Role of Science in a
Dynamic WorldDue to some regulations, not all of these pop-ups will be listed
as official sessions in the meeting program. Some of them will
be held as a brown-bag or lunch meeting. Keep an eye on our
twitter account (@AGU_H3S) for updates and news!

Kevin Trenberth to Receive
AGU Roger Revelle Medal
Kevin E. Trenberth, former co-chair of the GEWEX Scientific Steering Group from 2010–2013, an honorary Fellow of
the Royal Society of New Zealand and a distinguished Senior
Scientist at the National Center for Atmospheric Research,
will receive the American Geophysical Union’s Roger Revelle
Medal at the AGU Fall meeting in New Orleans on 13 December 2017. This medal is given in recognition for outstanding contributions in atmospheric sciences, atmosphere-ocean
coupling, atmosphere-land coupling, biogeochemical cycles,
climate, or related aspects of the Earth system. Dr. Trenberth
was nominated for the award for his outstanding researchbreakthroughs in several areas and his leadership in the World
Climate Research Program, the Intergovernmental Panel on
Climate Change and U.S. national research programs. Of particular note is his research in climate event attribution, his leadership in understanding the Earth’s energy imbalance and theplanet’s energy and water cycles. He has served continuously on
many World Climate Research Programme committees since
the initiation of WCRP to the present, and we are grateful for
his tireless efforts and commitment to climate science.
4

A New Vision for
GEWEX Global Atmospheric System
Studies (GASS) Panel
Xubin Zeng1 and Daniel Klocke2, Co-Chairs of GASS
1
Department of Hydrology and Atmospheric Sciences, University of Arizona, USA; 2Hans Ertel Center for Weather Research, Deutscher Wetterdienst, Germany

The GASS Panel was formed in 2010 when the GEWEXCloud System Studies Project, the Atmospheric Boundary
Layer Study and other related GEWEX projects were merged
into the Panel. Since its formation, GASS and its projects haveidentified weaknesses in the representation of physical processes in atmospheric models for climate and weather (e.g.,based on idealized test cases with single column modelingand large-eddy simulations), thus improving the understanding and subsequently the representation of these processes in
global models. This now commonly accepted and used model
development strategy can largely be credited to the initiativesof GASS and the related GEWEX activities that preceded it.
GASS and the Global Land/Atmosphere System Study(GLASS) Panel, which is responsible for studies related to theland surface and its interaction with the atmosphere, oversee
all GEWEX modeling and prediction activities. These include the development and improvement of parameterization
schemes to ensure their successful integration into weather
and climate models.
The co-chairs of the GASS and GLASS Panels are members of
the Working Group on Numerical Experimentation (WGNE),
which is jointly sponsored by the World Climate Research Programme and the World Meteorological Organization Commission for Atmospheric Sciences. WGNE fosters the developmentof atmospheric circulation models for use in weather, climate,water and environmental prediction on all time scales, and the
diagnosis and resolution of their shortcomings. It also promotes
coordinated numerical experimentation for validating model
results, observed atmospheric properties, and exploration of thenatural and forced variability and predictability of the atmosphere, as well as studies aimed at refining numerical techniques
and the formulation of atmospheric physics processes.
In past years, GASS has organized projects related to the atmospheric boundary layer, Madden-Julian Oscillation, clouds,
microphysics, boundary layer clouds, large-eddy simulationand single-column model intercomparisons, polar clouds,
cirrus, the grey zone (cloud and convection parameterization
with a grid size of 1–10 km) and atmospheric radiation (see:http://www.gewex.org/panels/global-atmospheric-system-studiespanel/gass-projects/).
The role of the GASS was recently assessed by GEWEX, andrecognizing the paramount importance of this Panel in achieving GEWEX goals, the GEWEX Scientific Steering Group
recently appointed new co-chairs to continue the importantwork of GASS.
August 2017

Strategy for GASSThe goal of GASS, to understand the physical processes andthe coupling of those processes to atmospheric dynamics,
particularly those that define the atmospheric branch of thehydrological cycle, remains the same. GASS will continue tofacilitate and support the international community that carries out and uses observations, process studies, and numericalmodel experiments with the goal of developing and improving
the representation of the atmosphere in weather and climate
models. Primarily, GASS will continue coordinating scientificprojects around process-oriented science questions that bring
together experts to contribute to the development of atmospheric models.
The connection between GASS and World Weather Research
Programme (WWRP) activities is a natural fit as both initatives have similar challenges in terms of model development
and experience on short and long time-scale predictions (e.g.,using intraseasonal prediction to bridge weather and climate).
In addition, the relationship to the weather prediction community will be further strengthened in the future via the
WWRP connection.
GASS projects will have crosscutting activities with other
GEWEX Panels and also connect to global initiatives, suchas the Aerosols, Clouds, Precipitation and Climate (ACPC)
Initiative, the Global Atmospheric Watch (GAW) and the
GEWEX Aerosol Precipitation (GAP) Project. GASS will
also attempt to address the relevant WCRP Grand Challenges, particularly Clouds, Circulation and Climate Sensitivity;
Weather and Climate Extremes; and Water for the Food Baskets of the World. The figure below shows these connections.
As idealized configuration modeling has now matured, GASS
will focus more on the role of process interactions, which becomes especially relevant when integrating improved processes
in existing models. Through either joint projects or the entrainment of expertise within GASS, the Panel will focus on
several research priorities in weather and climate models:Connections between GASS, GEWEX Panels and other global initiatives.

August 2017

• Coupling dynamics with physics (e.g., surface-boundary
layer-convection coupling, Madden-Julian Oscillation)• Mechanisms for the diurnal cycle of precipitation overdifferent regions• Precipitation coupling with aerosols, clouds and environmental conditions• Radiative transfer in the atmosphere and its interaction
with clouds and circulation• Representation of convection in models with a horizontal
grid size of 1–10 km and its role in high impact weather• Role of land processes in sub-seasonal to seasonal (S2S)
prediction (e.g., supporting the S2S WCRP and WWRP
joint project)• Stable boundary layers and the impact of surface conditions
on momentum transport and the energy and water cycle
GASS Panel Membership
The GASS Panel consists of two co-chairs and Panel members.
Each member is expected to be an expert in a field relevant to
GASS and be involved in one or more GASS projects as leader,
participant or stakeholder.
The new co-chairs have opened a dialogue with their GASS
colleagues about continuing existing projects and organizing
future GASS projects. The GEWEX community is encouraged to email their ideas for potential GASS projects to the cochairs. Learning from prior experiences, the co-chairs believe it
is preferable that the proposed projects align with the interestsof the proposers and his/her group or institution. This would
not only increase the chance of success of the projects’ successas GASS activities but also ensure the institutional support forthe proposers’ travel for attending GASS meetings.
The 2nd Pan-GASS Conference: Understanding and Modeling Atmospheric Processes
Five years after the first Pan-GASS Conference was held in
Boulder, Colorado, USA, the second Pan-GASS Conferenceis being planned for 26 February–2 March 2018 in Lorne(near Melbourne), Australia (http://singh.sci.monash.edu/PanGASS/index.shtml). The conference will bring together scientists working on various aspects of the representation of atmospheric physics in climate and weather forecasting models.
The sessions will be organized around core GASS topics toreflect past and future projects in the area of process studies
and atmospheric model development. One of the goals of theconference is to plan and discuss future GASS initiatives andthe direction of research supporting atmospheric model development globally. The conference will also serve as a starting
point for the new GASS Panel and its initiated projects.
A wide-ranging program of presentations and posters covering
the key challenges of current and next generation atmospheric model development is planned, as well as working groupmeetings on specific topics and plenary discussions. Abstract
submission will open on 1 September 2017.
5

Meeting/Workshop Reports
GLASS Panel Meeting
Tokyo, Japan
15–16 May 2017
Michael Ek1 and Gab Abramowitz2
1
NCEP Environmental Modeling Center, College Park,
Maryland, USA; 2UNSW Sydney and ARC Centre of Excellence for Climate Extremes, NSW, Australia

The Global Land/Atmosphere System Study (GLASS) Panelmeeting was held at the University of Tokyo with 16 GLASS
Panel members and guests attending, five remotely. The meeting occurred prior to the 4th Hydrology Delivers Earth System
Science to Society (HESSS4) conference, which took place
17–19 May and included several GLASS-related presentations. At the GLASS meeting, community and associatedcrosscutting activities under the three panel elements were reviewed, including: (1) land model benchmarking to improveknowledge and representation of land-surface processes; (2)understanding land-atmosphere interaction and feedbacks;and (3) the role of the land surface in predictability.
Local Land-Atmosphere Coupling (LoCo) Project
Ahmed Tawfik presented the status of the LoCo Project—now
in its second decade. The project is composed of 17 mostly
young scientists from around the globe who have been very
active in publishing and promoting LoCo-related work. This
work includes the Coupling Metrics Toolkit (COMET),
LoCo metric “cheat sheets,” a book chapter on land-atmosphere interactions, and a core LoCo article for the Bulletinof the American Meteorological Society (in progress). Publications are available on the LoCo website at http://www.gewex.
org/loco/. A great deal of energy in recent years has gone into
supporting improved observations of land-atmosphere coupling, most notably in terms of the surface layer, soil moistureand the Atmospheric Boundary Layer (ABL). Numerous field
campaigns were conducted or planned over the U.S. Southern Great Plains (SGP) and other regions. Many initiatives
were proposed to promote improved ABL retrieval from space
via the Decadal Survey, Global Climate Observing System/
Essential Climate Variables (GCOS/ECVs) and the associated NASA-dedicated task group. There are plans to produce a
LoCo-DICE [Diurnal Coupling Experiment, a joint GLASS
and Global Atmospheric System Studies (GASS) Panel activity] analysis and paper, and focus on single-column model
benchmarking (i.e., vertical benchmarking) to compliment
the ongoing Protocol for the Analysis of Land Surface models(PALS)/PALS Land Surface Model Benchmarking Evaluation
Project (PLUMBER) efforts.
PALS/PLUMBER
Gab Abramowitz provided an update on PALS (http://
www.modelevaluation.org) and discussed the scope of a new
6

PLUMBER activity. Changes to PALS include: (1) analyses are no longer restricted to a particular package or language; (2) a distributed architecture will allow analyses tobe co-located with big data; (3) the potential for an Application Programming Interface (API) access to allow remotecontinuous integration testing of science in a model, not justcode; and (4) a more generic design that can be used withany model type or component, not just land-surface models (LSMs). Under PALS, model intercomparison projects(MIPs) are transparent (analysis scripts are viewable, and experiments can be replicated) and MIPS are ongoing (newmodel additions will automatically be analyzed, and new
analyses can be added retrospectively). This flexibility andgreater capability means, for example, that MIPs such as the
Global Soil Wetness Project (GSWP), PLUMBER and thelegacy Project for Intercomparison of Land-Surface Parameterization Schemes (PILPS) experiments could be availableand (re)analyzable quickly.
A future project, PLUMBER2, was discussed and a number of related issues were raised, including: (1) more sites areneeded (versus the original 20 PLUMBER sites) and better
quality-controlled and energy-balance-corrected FLUXNET
site data, which could include urban regions; (2) improvementin the hierarchy of empirical models is needed to benchmark
against (including energy and mass conservation by theseempirical models); (3) more variables are necessary so thatprocess-representation differences in models can be explored;(4) LSMs should be examined within a Budyko framework[i.e., investigating how the dryness index (potential evaporation/precipitation) affects a range of performance metrics]; (5)additional sites are needed that have boundary-layer data soland-atmosphere coupling effects can be investigated, e.g. for
LoCo as described above, and for joint GLASS-GASS studies, including future phases of DICE. In this regard, Michael
Ek expanded on the topic of future DICE efforts, including
possible leverage efforts by the joint National Oceanic and Atmospheric Administration/National Center for AtmosphericResearch “Global Model Testbed,” which advocates a comprehensive simple-to-more-complex process-level model development hierarchy, including component-level (e.g., land,
surface-layer) and single column model testing.
GSWP3 and LS3MIP
Hyungjun Kim gave an update on the status of the Global
Soil Wetness Project Phase 3 (GSWP3) and the Land Surface, Soil Moisture and Snow Model Intercomparison Project (LS3MIP). GSWP3 is a global offline land MIP with a
0.5-degree forcing data set that will also be used for LS3MIP,
the Land-Use Model Intercomparison Project (LUMIP) Coupled Model Intercomparison Project Phase 6 (CMIP6) and the
GEWEX SoilWAT Project (described below). LS3MIP also
includes an offline land component (“LMIP”) endorsed by
CMIP6, which will feature a long-term retrospective GSWP3
experiment starting in 1850 that uses prescribed land-use andland-cover changes derived from the Land Use Harmonization (LUH) data set. The 165-year data set has been frozen
and is available for CMIP6 land-related studies.
August 2017

LUMIP
Dave Lawrence provided an update on LUMIP, which is partof the CMIP6 suite of experiments whose experimental design has been published in Geoscientific Model Development(Lawrence et al., 2016). The historical LUH2 land use data set
has been provided to the community and beta versions of the
Shared Socioeconomic Pathway futures are also available withfinal versions expected in northern hemisphere (NH) summer
2017. Included in the LUMIP manuscript is a description of
the sub-grid land use tile request (a subset of variables are requested on primary and secondary land, cropland, pastureland and urban land use tiles). For additional information on
the LUMIP project, including links to access the LUH2 data,
sign up for the LUMIP Google group and updates to the experimental design (available at https://cmip.ucar.edu/lumip).
Simulations are expected to begin in NH summer 2017 asmodeling centers start working on CMIP6.

Colors indicate which of the three simulations performs best for a particular variable. Red colors indicate that a particular simulation performed
worst and green colors indicate that the simulation performed better. Eachvariable includes several metrics (e.g., RMSE, bias, interannual variability, spatial pattern correlation) and potentially several data sets (e.g., for
LH Global Bio-Atmosphere Flux gridded data and FLUXNET sites). Variables labeled in red are “forcing” variables, which in these land-only
simulations effectively represent an assessment of the forcing data sets.

August 2017

International Land Model Benchmarking (ILAMB) Project
Dave Lawrence also gave an update on the ILAMB Project,
where two versions of the ILAMB package have been released
to the community. ILAMB Version 2 will be developed as
open-source software, written primarily in Python. The current version assesses approximately 25 carbon, hydrology, energy and climate variables using 60 global, regional and site
level data sets. Metrics for root-mean-square error (RMSE),
absolute error, interannual variability, spatial patterns, variable-to-variable comparisons and more are included. An example is shown in the figure below, illustrating the impact ofmodel structural improvements [Community Land Model
4 (CLM4) versus CLM4.5] compared against the impact offorcing data sets [Climatic Research Unit-National Centers forEnvironmental Prediction (CRUNCEPv4) versus GSWP3v0]
using the ILAMB package. The package currently generates
thousands of plots and is being utilized in model assessment
and development, and to support analysis of MIPs. Example
output from ILAMB, assessing output from simulations fromseveral generations of the CLM [forced with GSWP3 and
CRUNCEP data sets], is available at: http://ilamb.ornl.gov/
CLM/. Note that results at this location are subject to change
as both the ILAMB package and CLM are being finalized;
figures from this example of the package should not be used
for publication. Anyone interested in contributing data sets or
metrics is encouraged to contact ILAMB project leads (DaveLawrence, Forrest Hoffman, Jim Randerson, Bill Riley, Charlie Koven, Gretchen Keppel-Aleks or Nate Collier). The final
workshop report of the May 2016 ILAMB workshop (Hoffman et al., 2017) is available at https://www.ilamb.org/. Finally,
the ILAMB and PALS projects are exploring options to coordinate efforts for the mutual benefit of both projects.
Crosscuts and Joint Projects—GASSJohn Edwards reported on the links between projects in the
GLASS and GASS panels. Many of the projects within GASS
are heavily focused on cloud processes, but two have a particularly strong relationship to the land surface. The GEWEX
Atmospheric Boundary Layer Study (GABLS), led by Bert
Holtslag and Gunilla Svensson, has conducted several intercomparisons of stable boundary layers involving both singlecolumn studies using the physical schemes from numerical
weather prediction and climate models, and also large-eddy
simulation models. As the project has evolved, an increasingemphasis has been placed on more stable boundary layers andon coupling to the land surface (i.e., the GLASS-GASS joint
project on DICE with an initial focus on the U.S. SGP). The
current intercomparison, GABLS4, led by Eric Bazile, is concerned with simulation of the diurnal cycle of the boundary
layer at a site on the Antarctic Plateau (the so called “DICEover-ice” project). Recent progress was discussed at a workshop on stable boundary layers in March 2017 in Delft, The
Netherlands. The Clouds Above the United States and Errors
at the Surface (CAUSES) Project, led by Cyril Morcrette andHsi-Yen Ma, is concerned with understanding the origin ofcontinental warm biases in near-surface air temperature in
the summer in both weather and climate models, making
extensive use of data from the Atmospheric Radiation Mea7

surement site in the U.S. Great Plains in Oklahoma. Understanding the impact of clouds is a key part of this project, butcurrent results indicate that surface processes also play a role.
SoilWatVincent Humphrey and Aaron Boone, and Anne Verhoef (remotely) gave updates on the status of the joint GEWEX andInternational Soil Modeling Consortium (ISMC) GEWEX
Soil and Water (SoilWat) initiative. The goals of the project are
to conduct an in-depth survey on how key soil physical processes (water and heat flow) are represented in climate and hydrological models, to make a systematic assessment of the utility of resolved soil maps, and sensitivity of climate models in
improving the quality and resolution of soil maps and to survey
how groundwater is implemented in climate models (and how
this might lead to a global database of historical and current
groundwater levels). The first two of these are under way withactive surveys and a Soil Parameter MIP (SP-MIP) that closely
follows LS3MIP protocols (van den Hurk et al., 2016).
GLASS Panel Interactions with other Projects—GHP
Additional crosscutting projects in GEWEX and other groups
were discussed. In the GEWEX Hydroclimatology Panel(GHP), process level improvements in land are a shared interest with GLASS. Craig Ferguson, GLASS liaison with GHP,
reviewed GHP projects, including Regional Hydroclimate
Projects (RHPs) and crosscutting projects such as subdaily
precipitation (Intelligent use of climate models for adaptation
to non-Stationary hydrological Extremes, INTENSE), cold/
shoulder season precipitation near 0°C and mountain hydrology (International Network for Alpine Catchment Hydrology,
INARCH). In this regard, Gab Abramowitz summarized theissue of how water management and human influences (onboth water and energy cycles) are treated in large-scale models,
which is of interest to GLASS and GHP, and the subject of a2016 joint workshop. Future activities are being planned. Aaron
Boone updated the Panel on the status of “Land surface Interactions with the Atmosphere over the Iberian Semi-arid Environment” (LIAISE), a regional project with seasonally stressed
vegetation and often a high degree of heterogeneity, and theneed to better model the surface energy budget and properly
represent the seasonal dry-down period. The likely timing forthe measurement program in LIAISE is May 2019–May 2020,
with linkages between GLASS, GHP and other projects.
Hydrological Cycle in the Mediterranean Experiment
As the liaison between GHP and GLASS, Pere Quintana Seguí
gave an update on the work of the HyMeX Droughts and Water
Resources science team towards the improvement, understanding and quantification of drought in the Mediterranean. This
work is built around three themes: (1) defining drought, (2)understanding drought processes, and (3) predicting drought.
Drought description work has been done at the regional/country level, such as examination of drought trends in Italy andTunisia. As data sharing between countries is difficult, the aim
is to use a common methodology to harmonize results. Interesting work has been performed using hydrological models forcedby downscaled long-term reanalysis data in order to reconstruct8

past droughts for a period of 140 years in France. Remote sensing data (RSD) is also being used to describe drought (vegetation, precipitation, soil moisture), and to quantify the water levels behind smaller dams, since in many countries reservoir-level
data are not available. Additionally, RSD are being assimilated
in LSMs at different scales (single plot to an entire country). At
the larger scales, LSMs are used to estimate river flow and fresh
water inputs into the Mediterranean Sea. In terms of prediction,
there is an effort to study the applicability of seasonal forecasts
for water resource management in small Mediterranean basins,with interesting results. HyMeX research has been carried out
under several projects, and in this regard, the future LIAISE
campaign will examine the role of the land surface during thedry-down period in Iberia.
WCRP and Other Organizations
Michael Ek reported on liaison activities with the WCRP Modeling Advisory Council (WMAC) and the World MeteorologicalOrganization Working Group on Numerical Experimentation(WGNE). The broad goal of WGNE and WMAC is to improve global weather and climate models and coordinate highlevel aspects of modeling across WCRP. The GLASS presence inthese groups is focused on land-modeling and land-atmosphereinteraction. Paul Dirmeyer provided updates on the activities of
the Sub-seasonal to Seasonal (S2S) Prediction Project activities
and the joint GEWEX-Climate and Ocean: Variability, Predictability and Change (CLIVAR) Monsoon Panel efforts. Most
relevant to GLASS is the increasing interest in land initialization, which includes soil moisture and snow, and the impact
on S2S predictive skill, which is relevant for proper modelingof monsoon circulations. Rich Ellis reviewed the link between
GEWEX and the Integrated Land Ecosystem Atmosphere Processes Study (iLEAPS), where the focus of iLEAPS is on ecosystems and land-use changes and their effects on biogeochemical
cycles and land-atmosphere interaction, which involves a strong
overlap on a number of topics with the GEWEX focus on energy and water. This includes a future iLEAPS-GEWEX collaborative project on the Arctic (ArcticMIP), where the importanceof modeling high-latitude processes is being addressed, and will
be discussed at the Arctic Terrestrial Modeling Workshop in
Oxford in September 2017. Such a focus on the Arctic could
also involve and improve GEWEX-wide participation, i.e.,
land-model benchmarking (GLASS), land-atmosphere interaction studies (GLASS and GASS), regional hydrology (GHP)and remotely sensed data sets working with the GDAP, thereby
increasing GLASS-GDAP interaction.
References
Hoffman, F. M., et al., 2017. International Land Model Benchmarking(ILAMB) Workshop Report. Technical Report DOE/SC-0186, U.S. Department of Energy, Office of Science, Germantown, Maryland, USA,
doi:10.2172/1330803.
Lawrence, D. M., et al, 2016. The Land Use Model Intercomparison Project (LUMIP) contribution to CMIP6: Rationale and experimental design.
Geosci. Model Dev., 9, doi:10.5194/gmd-9-2973-2016.
van den Hurk, B., et al., 2016. LS3MIP (v1.0) contribution to CMIP6: theLand Surface, Snow and Soil moisture Model Intercomparison Project –Aims, setup and expected outcome. Geosci. Model Dev., 9(8), 2809–2832.

August 2017

4th HESSS International Conference on
Meeting/Workshop Reports
Climate Extremes andGlobal Energy, Water and Carbon Cycles
Tokyo, Japan
16–19 May 2017
2

3

Over past centuries, the land-atmosphere energy and water cycles and the terrestrial biosphere have been substantially affected by human-induced alterations of water flows and storages
through irrigation practices, damming rivers and groundwater
extraction, in addition to the significant impacts on global
warming by anthropogenic greenhouse gas emissions. Bothclimatic and land-surface changes are projected to continue
into the future, and the interactions between the two necessitate consideration of all the human drivers when trying tounderstand changes in the global water and energy cycles andthe implications of projected climate change and mitigation
options. The global change research agenda is thus inherently
cross-disciplinary, compeling scientific communities to engage
with each other across traditional science boundaries.
Since 2007, the Hydrology delivers Earth System Sciences
to Society (HESSS) conferences have provided forums forstrengthening synergies between climate modeling and monitoring research communities. The “4th HESSS International
Conference (HESSS4) on Climate Extremes and Global Energy, Water and Carbon Cycles: Improving and Integrating
Knowledge Across Disciplines” was hosted at the Institute ofIndustrial Science at the University of Tokyo. Over 100 participants from 16 countries attended the conference, whichfeatured 47 oral and 34 poster presentations. The scientificfocus of HESSS4 was on climate extremes and their impacts,
and the importance of these events in a changing climate andto society. Also discussed were recent model intercomparison
projects (MIPs) spanning multiple disciplines.
HESSS4 had five sessions covering the following topics:• Changes of Climate Forcing and Terrestrial Feedback• Changing Climate and the Natural Human System
August 2017

• Uncertainties in Model Simulations and• Delivering Science to Society.
In addition, four sessions dealt with the following topics:

Hyungjun Kim , Jacob Schewe , Gab Abramowitz ,Michael Ek4, Aaron Boone5, Sonia I. Seneviratne6,
Forrest M. Hoffman7, James S. Famiglietti8, Toshiyuki
Nakaegawa9, Yukihiko Onuma1, Tomoko Nitta1, Dai
Yamazaki1, Takao Yoshikane1, Masashi Kiguchi1, Kei
Yoshimura1, Yukiko Hirabayashi1 and Taikan Oki1
1
Institute of Industrial Science, the University of Tokyo,
Tokyo, Japan; 2Potsdam Institute for Climate Impact Research, Potsdam, Germany; 3University of New South
Wales, NSW, Australia; 4NCEP Environmental ModelingCenter, College Park, Maryland, USA; 5CNRM MétéoFrance/CNRS, Toulouse, France; 6Institute for Atmosphericand Climate Science, ETH Zürich, Switzerland; 7Oak Ridge
National Laboratory, Oak Ridge, Tennessee, USA; 8Jet Propulsion Laboratory, Pasadena, California, USA; 9Meteorological Research Institute, Japan Meteorological Agency,
Tsukuba, Japan
1• Satellite Remote Sensing and Model Integration• Climate Extremes: Atmospheric Forcing, Land Feedback
and Propagation;• Interactions between Nature and Society: Modeling andPolicies;• Short-/Mid-Range Hydrologic Forecast and Data Assimilation; and• Satellite Remote Sensing for Extreme Monitoring.
The GEWEX Global Land Atmosphere System Study(GLASS) Panel and the Inter-Sectoral Impact Model Intercomparison Project (ISIMIP) each held an open science session, and two tutorial sessions related to the International
Land Model Benchmarking (ILAMB) Project were also convened. The program and presentations are available at: http://
www.gewexevents.org/events/hesss4/.
As proposed at the HESSS2 Conference in 2010, the GEWEXGlobal Soil Wetness Project Phase 3 (GSWP3) serves as liaison
among the various projects and MIPs. The protocol and theatmospheric boundary conditions have been shared with the
GEWEX Global Land Atmosphere System Study (GLASS)
Panel and projects across disciplines, including ISIMIP, theEarth System Model-Snow Model Intercomparison Project (ESM-SnowMIP)—linking WCRP and its Climate andCryosphere (CliC) Project—and the satellite MIPs of the 6th
Phase of the Coupled Model Intercomparison Project Phase(CMIP6) such as Land Surface, Snow, Soil-moisture Model
Intercomparison Project (LS3MIP) and the Land Use Model
Intercomparison Project (LUMIP). During HESSS4, it was
confirmed that these efforts efficiently reduced redundancy
across the initiatives and built capacity among communities.
Discussions were held on facilitating better communication
between science communities and society and it was suggested
that HESSS reach out to social scientists. Reducing knowledge and information asymmetry would be one of the keys
to linking hydrology and society and proposing solutions tobring the different disciplines together. It was recommended
to maintain, mine and rescue data on socio-hydrology, which
will be of key importance as satellite and other global data
drive the development of macroscale land surface and hydrologic models. HESSS5 would be an opportune checkpoint tomeasure the changes in gaps and progress toward a better interdisciplinary structure.
A conference special issue will be published in Water Resources
Research in the American Geophysical Union Journal (Organizers: H. Kim, J. Schewe, F. M. Hoffman and Y. Wada). During
the submission window of 15 June–31 October 2017, papers
from the HESSS4 conference and its associated communities
are invited (contact Hyungjun Kim via e-mail at hjkim@iis.utokyo.ac.jp).
9

10th HyMeX Workshop
Barcelona, Spain
3–7 July 2017
Philippe Drobinski1, Véronique Ducrocq2, Maria Carmen
Llasat3, Pere Quintana-Seguí4, Joan Bech3 and Javier
Martin-Vide3
1
IPSL/LMD, France; 2CNRM/GAME, France; 3Universitat deBarcelona, Spain; 4Observatori de l’Ebre, Spain

The Hydrological Cycle in the Mediterranean Experiment(HyMeX) is a 10-year (2010–2020) GEWEX Hydroclimatology Panel Regional Hydroclimate Project to improve theunderstanding of the water cycle, with emphasis on extreme
events by monitoring and modeling the Mediterranean
atmosphere-land-ocean coupled system and its variability.
Building upon the 5-year review of HyMeX achievements
conducted in 2015 (see report on page 20 of the November
2015 issue of GEWEX News), more than 160 scientists fromover 10 countries participated in the 10th HyMeX Workshop
to present first results related to the new science plan developed at the last workshop. Emphases included more integrated transdisciplinary studies, including water resources,
droughts and their impacts, the water cycle and renewableenergy resources, flash floods and social vulnerabilities andan attempt to integrate forecasting of heavy precipitation,
flash floods and their impacts. The workshop also aimed at
preparing the second Mediterranean Coordinated Regional
climate Downscaling Experiment (MED-CORDEX-2) andupcoming field campaigns.
Continuum Scale and Integrated Analysis
One hundred talks and 69 posters presented scientific resultson the main HyMeX topics in plenary and parallel sessions.
The session themes included heavy precipitation, ocean circulation processes, cyclones and strong winds, flash floods andvulnerability, flash-flood prediction, water budgets, drought
and water resources and integrated prediction. Seventeen parallel working sessions of the different HyMeX science teams
enabled transdisciplinary discussions and promoted dialogue
on the three future field campaigns, and on the preparationof the second MED-CORDEX exercise. The workshop program, presentations and more information about HyMeX areavailable at: http://www.hymex.org.
Preparation of MED-CORDEX2
The workshop was also an opportunity to confer over the implementation of the MED-CORDEX flagship pilot studies,
which can be seen as the follow-up of the first MED-CORDEX
exercise (Ruti et al., 2016). This discussion was carried out in
one full day, held before the official start of the HyMeX workshop, and in several parallel working sessions during the workshop. These sessions aimed to identify the participants of each
MED-CORDEX flagship pilot study and the models, and to
define the numerical protocol and the agenda. There are three
MED-CORDEX flagship pilot studies.
10

One flagship pilot study is dedicated to convection and is shared
between MED-CORDEX and EURO-CORDEX. Its objective is to investigate convective-scale events, their processes andtheir changes in a few key regions of Europe and the Mediterranean using convection-permitting regional climate models(RCMs), statistical models and available observations. It also
strives to provide a collective assessment of modeling capacity
at the convection-permitting scale and to shape a coherent andcollective assessment of the consequences of climate change on
convective event impacts at local to regional scales.
The second MED-CORDEX flagship pilot study focuses on
air-sea interactions, with special emphasis on the role of small
scale ocean processes and waves. The selected region is the areasurrounding the Mediterranean Sea, which is often referred toas an ocean in miniature, due to the variety of processes occurring therein. These include strong air-sea interactions, active
mesoscale and submesoscale dynamics and a permanent thermohaline overturning circulation. A detailed analysis of how
air-sea coupling at high resolution can modify the regional
climate, and consequently the global climate is still missing in
the literature. There are some indications that it could provide
an added value to RCMs in both the present climate and future scenarios, but the mechanisms underlying such impacts
are not completely understood.
The third MED-CORDEX flagship pilot study is dedicatedto the role of natural and anthropogenic aerosols in the Mediterranean region. Aerosols strongly affect the Mediterranean
Basin, which is located at the crossroads of air masses carrying
both natural and anthropogenic particles, making it an ideal
testbed for aerosol effects on climate. They are currently nottaken into account well in RCMs. The use of RCMs with explicit aerosol representation will help us understand the role ofMediterranean aerosols on past regional climate variability. It
will also help to determine the role of regionally born aerosolsin the future climate sensitivity of the Mediterranean region
and to address the role of aerosols in shaping extreme events(continental heat waves, heavy precipitation events, ocean heatwaves, strong regional winds, droughts) in the Mediterranean.
These flagship pilot studies will contribute to several WCRP
Grand Challenges, especially on climate extremes and water availability. They also contribute to one of the identified
CORDEX Challenges on coupled regional climate models.
Future Field Campaigns
Three campaigns are also planned in the frame of HyMeX tocomplement the completed field experiments from the Enhanced Observation Period (Braud et al., 2014) and Special
Observation Periods (SOP1, Ducrocq et al., 2014; Ferretti etal., 2014; and SOP2, Estournel et al., 2016) (see Drobinski etal., 2014 for a full overview). The field experiments in preparation (shown in the figure on the next page) are:• EXploiting new Atmospheric Electricity Data for Researchand the Environment (EXAEDRE)—an experimentplanned for September 2018 on atmospheric electricity,
complementing activities from SOP1 (Defer et al., 2015)
August 2017

Location of the future field campaigns planned within the frame of HyMeX.

• The Pelagic Ecosystem Response to dense water formationin the Levant Experiment (PERLE)—an oceanic experiment planned for October 2018, February 2019 and June–
July 2020, supplementing SOP2 (Estournel et al., 2016),
but in the Levantine region in the eastern Mediterranean.
• Land surface Interactions with the Atmosphere over the
Iberian Semi-arid Environment (LIAISE)—an experiment planned from April 2020 to March 2021, focusing on land surface interactions over the Iberian semi-arid
environment.
The workshop provided an opportunity for in-depth discussions on implementing the field campaigns, including funding issues, instrumental set-up, deployment strategies andmore.
The EXAEDRE field campaign aims to improve knowledge
by combining observation and modeling, not only for thevarious physical phenomena that accompany lightning, butalso to study the contribution of “flash” information for applications to monitor extreme phenomena and to quantify the
improvement of weather forecasts by introducing the “flash”
data into an assimilation chain. This approach anticipates theuse of powerful “all-weather” lightning detectors placed ingeostationary orbit as part of the Meteosat Third Generation
program. EXAEDRE revolves around the following observation components:
1. observations already collected in SOP1 (Defer et al., 2015)
and permanent measurements of electrical activity by thethree-dimensional light detection Suivi de l’Activité ElecAugust 2017

trique Tridimensionnelle Totale de l’Atmosphère (SAETTA)
Network and the Météorage Operational Network,
2. the development of a new lightning detector based on theprinciple of very high frequency interferometry, and
3. a field campaign in Corsica, associating the SAETTA Network with the French Service of Instrumented Aircraft forEnvironmental Research (SAFIRE) Falcon20, carrying the
RASTA radar, primary marine aerosol microphysics probes
and the AMPERA platform for measuring the electric fieldalong three axes.
All this is accompanied by ground instrumentation sensitive to the phenomenon of electrification of clouds and to theproperties of natural electric discharges, and by ground andspatial remote sensing to monitor environmental conditions.
The PERLE action, shared between HyMeX and the Marine
Ecosystems Response in the Mediterranean Experiment(MerMeX), aims at describing the formation and spread of
Levantine Intermediate Water and determining its role on the
distribution of nutrients and on the structuring of planktonic
ecosystems in the eastern Mediterranean. It is a complement
to the SOP2 experiments conducted in the northwestern
Mediterranean with similar objectives. The Levantine Intermediate Water is one of the most crucial water masses of theMediterranean—it contributes to most of the subsurface water and salt transport between the eastern and western basinsof the Mediterranean, it plays a key role in the deep convection both in the northwestern Mediterranean and in theSouth Adriatic and it fills nearly all the intermediate layers of11

the eastern basin, where it is prone to vertical exchanges withthe surface layer that supplies nutrients to the photic layer andsupports a significant fraction of the primary production. The
PERLE strategy is based on intensive field work concentrating all of the observation methods (cruises, moorings, gliders,profilers and satellites) of key physical and biogeochemicalparameters in an experiment lasting one full annual cycle,
and on the use of longer-term observations from existing andfuture observation systems. It is complemented by a massivemodeling effort, which includes the implementation, validation and improvement of physical-biogeochemical coupledmodels to simulate recent trends on the basis of observations
and future scenarios.
Finally, the LIAISE field campaign will explore the surface/atmosphere interactions over the Iberian Peninsula. Specifically, it aims to create a better understanding of the dry-downof soils after the winter rainfall has ended, as this is a criticalseason for the Mediterranean climate. It determines the water
resources that will be available for the crop growing period,
the state of the natural vegetation and it probably holds predictive value for atmospheric conditions for the summer. In achanging climate, the period of an annual cycle will be criticalfor managing water resources and adapting our societies to awarmer world. Fundamental knowledge also needs to be built
on the impact of water and environmental management on
local climatic processes. Field campaigns are planned, combining ground-based in-situ and remote sensing measurements at different sites (among those the Ebro Basin) as wellas airborne measurements.
References

Braud, I., et al., 2014. Multi-scale hydrometeorological observation andmodelling for flash-flood understanding. Hydrol. Earth Syst. Sci., 18,3733–3761.
Defer, E., et al., 2015. An overview of the lightning and atmospheric electricity observations collected in Southern France during the HYdrologicalcycle in Mediterranean EXperiment (HyMeX), Special Observation Period 1. Atmos. Meas. Tech., 8, 649–669.

GEWEX/WCRP Calendar
For the complete Calendar, see: http://www.gewex.org/events/
18–20 September 2017—4th Satellite Soil Moisture Validation and Application Workshop and CCI Soil Moisture User Workshop—Vienna, Austria
18–22 September 2017—COSPAR 2017—Jeju, Republic of Korea
25–28 September 2017—CFMIP Meeting on Clouds, Precipitation, Circulation, and Climate Sensitivity—Tokyo, Japan
9–12 October 2017—Annual GEWEX Data and Assessment Panel(GDAP)Meeting—Boulder, Colorado, USA
9–13 October 2017—32th Session of WGNE and Pan-WCRP ModelingGroups Meeting—Exeter, United Kingdom
16–18 October 2017—25th SPARC Scientific Steering Group Meeting—Seoul, Republic of Korea
17–19 October 2017—GEWEX Hydrometeorology Panel (GHP) and
Third Pole Experiment (TPE) Workshop—Kathmandu, Nepal
25–26 October 2017—7th GEWEX Global Water Vapor (GVAP) Assessment Workshop—Leicester, United Kingdom
13–17 November 2017—5th International Conference on Reanalysis(ICR5)—Rome, Italy
27–30 November 2017—23rd Session of CLIVAR SSG—Rome, Italy
7–11 January 2018—98th AMS Annual Meeting—Austin, Texas, USA
6–8 February 2018—HEPEX Workshop on Breaking the Barriers—Melbourne, Victoria, Australia
8–9 February 2018—3rd International Network for Alpine Research Catchment Hydrology (INARCH) Workshop—Zugspitze, Germany
26 February–2 March 2018—2nd Pan-GASS Conference—Lorne, VIC,
Australia
6–11 May 2018—2018 GEWEX Science Conference—Canmore, Alberta,
Canada
11–15 June 2018—2nd Baltic Earth Conference—Helsingoer, Denmark

Drobinski, P., et al., 2014. HyMeX, a 10-year multidisciplinary programon the Mediterranean water cycle. Bull. Amer. Meteor. Soc., 95, 1063–
1082.

11–15 July 2018—COSPAR 2018: 42nd Scientific Assembly of COSPAR—
Pasadena, CA, USA

Ducrocq, V., et al., 2014. HyMeX-SOP1, the field campaign dedicatedto heavy precipitation and flash-flooding in northwestern Mediterranean.
Bull. Amer. Meteor. Soc., 95, 1083–1100.

GEWEX NEWS

Estournel, C., et al., 2016. HyMeX-SOP2, the field campaign dedicated todense water formation in the northwestern Mediterranean. Oceanography,
29, 196–206.
Ferretti, R., et al., 2014. Overview of the first HyMeX Special Observation
Period over Italy: Observations and model results. Hydrol. Earth Syst. Sci.,
18, 1953–1977.
Ruti, P. M., et al., 2016. MED-CORDEX initiative for Mediterranean
climate studies. Bull. Amer. Meteor. Soc., 97, 1187–1208.

12

Published by the International GEWEX Project OfficePeter J. van Oevelen, Director
Dawn P. Erlich, Editor
Shannon F. Macken, Assistant Editor
International GEWEX Project Officec/o USRA
425 3rd Street SW, Suite 605
Washington, DC 20024 USA
Tel: 1-202-527-1827
E-mail: gewex@gewex.org
Website: http://www.gewex.org

August 2017