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Current GEWEX Organization. Panel Activities. GHP GRP GMPP. GPCP ISCCP SRB. CEOP ISLSCP CSEs. GCSS GABLS GLASS. CEOP. Data Management. Water and Energy Budget Studies. Sources and Cycling of Water. Extremes. Transferability. Predictability.

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current gewex organization
Current GEWEX Organization

Panel Activities













Data Management

Water and Energy Budget Studies

Sources and Cycling of Water




Water Resource Applications Project





La Plata


ghp significant results
GHP: Significant Results
  • CSEs
    • Comprehensive regional land and atmosphere analyses (and reanalyses)
    • Improved regional model forecasts
    • Improved land water and energy process understanding
    • Comprehensive land based precipitation, runoff, and surface and isotope characteristics
    • ISLSCPII (1986-1995) about ready for dissemination
  • CEOP
    • Coordinated in situ data, global model output, and remote sensing data
  • WEBS
    • A growing number of published regional water and energy budget syntheses and sponsored scientific sessions

GRP Highlights

  • the data products (ISCCP, GPCP, GACP and SRB) are now available covering the period from the early 1980's to early this decade (slightly different dates for each but the common period is 1983-2001) and will be produced through 2003 by this summer;
  • a newlyrevised SeaFlux dataset is available covering 1989-2000;
  • GRP will now focus on preparing and releasing a combined data product, adding some datasets from others (GSWP and reanalyses);
  • This will result in a nearly "complete" description of the global energy and water cycle, resolving weather scale variations over a period of 10-15 years....
gmpp recent activities
GMPP recent activities
  • GCSS: study of a tropical convection case with a focus on the diurnal cycle ...
  • GLASS:
    • Global off-line evaluation(GSWP-2)
    • Comparison of the intensity of surface/atmosphere coupling in coupled models (GLACÉ)
    • Continuationof of the point/off-line evaluation (PILPS)
  • GABLS: A simple arctic case studied with LESs and PBL parameterizations.

nd Global Soil Wetness Project

Multi-model investigations into variability and predictability of the global surface water and energy cycles

GSWP-2 represents an evolution in multi-model large-scale land-surface modeling with the following features:

The ten year (1986-1995) length of the ISLSCP Initiative 2 allows for a better investigation of interannual land surface climate variability.

The ISLSCP Initiative 2 data set will contain more than one rendition of many global fields, produced by different methods and scientists. This gives us a straightforward means to investigate LSS sensitivity to the choice of forcing data sets.

Application and further development of the methods of calibration and validation of LSSs with in situ and remote sensing data.

This project will produce a model based estimate of the global continental water fluxes with estimates for the errors linked to the modelling and the forcing fields


Time-mean (fluxes)

    • General energy balance components
    • General water balance components
    • Evapotranspiration components
    • Streamflow
  • Instantaneous
    • Surface state variables
    • Sub-surface state variables
    • Variables for validation with remote sensed data
    • Cold season processes

Examples of data layers from the ISLSCP data project.

validation ii
Validation II

There will be three main modes of in situ validation of participating LSMs:

Streamflow – Runoff fluxes from LSSs will be routed with river models to compare with streamflow measurements across a large portion of the globe. This analysis can also uncover problems in the forcing data at basin scales. For large basins, comparison of water storage change with analysed moisture convergence are possible.

ceop results and milestones
CEOP Results and Milestones
  • CEOP Reference Site Data Management
    • EOP-1 (Seasonal) July-September 2001 dataset released in 2003
    • EOP-3 (annual) October 2002-September 2003 ready for release
    • Proposal to complete this data work funded by NOAA/GAPP
  • CEOP Model Output Data Product/Handling
    • Requests to NWP Centers for time series and global fields output have been responded to by NCEP, GMAO, ECMWF, BMRC, JMA, Uk Met Office, ECPC, NCMRWF, Environment Canada and CPTEC.
    • The Max Planck Institute for Meteorology is assisting CEOP with Model Output data handling and archiving
  • Water and Energy Simulation/Prediction
    • Major Activities Plan Published, EOP-1 Intercomparison Project completed, Published in CEOP Newsletter
    • Association with GEWEX WEBS Effort has been formalized between CEOP/GHP
    • CSE data being applied to CEOP Water Cycle analysis projects
ceop results and milestones1
CEOP Results and Milestones

Remote Sensing/Data Integration

In Situ




U. Tokyo



300 TB

0.1 TB

50 TB

10 TB

  • Data Integration
ceop ii 6 year implementation plan
CEOP-II 6-year Implementation Plan
  • Part-I(2005-2006)
    • CEOP-I Science Goal (WESO and CIMS) Accomplishment by Using CEOP-I Data Sets
    • Building a Integrated Observation System for the Global Water Cycle toward GEOSS
  • Part-II(2007-2010)
    • Implementation of the CEOP-II Integrated Observation System for the Global Water Cycle
    • CIMS Extension to WCRP Pan Monsoon Study
    • Cold Region Study in Cooperation with CliC
    • Down-scaling Study