An Element of the World Climate Research Programme (WCRP),
initiated by the Global Energy and Water Cycle Experiment (GEWEX)

Schedule of C EOP
2001
The CEOP Preliminarary Data Period

2002

1 JulyThe CEOP Buildup phase

2003

2004

30 September
1 October

30 September

The First CEOP Annual Cyc Period

1 October

The Second CEOP Annual Cye Period

30 September
1 October

30 September

Contact Address of International Coordination Body
International Coordinator
Sam Benedict
742 "H" Avenue, Coronado, CA, 92118, USA; Phone: +1-619-437-7904, Fax: +1-619-437-6814
E-mail: seb@www.wmo.chInternational Coordination OfficeSecretary general: Dawen Yang
Secretary: Akiko Goda
Technical support: Katsunori Tamagawa
Department of Civil Engineering, University of Tokyo
Core Research for Evolutional Science and Tecnology (CREST)
7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Phone: +81-3-5841-6132 Fax: +81-3-5841-6130
E-mail: ceop@monsoon.t.u-tokyo.ac.jp
Home Page: http://monsoon.t.u-tokyo.ac.jp/ceop/index.html

March 2002

CEOP Science Objectives:

CEOP Comprehensive Data Set:

F

Integrated Data Setsl Data Assim
ionailastioenmniomteeRDSense(4tilrling
DDteuaoSAdelModel)
CoupReference Site

Regional & Global
Water Cycle
Variation

CEOP Reference S ites

Data Management Strategy:1612923971718

485312061921221011123233

131425261524 23

282730CEOP Under the Framework of IGOS-P
CEOP is Endorsed as theFirst Element of the IGOS-P Water Cycle ThemeCEOP was confirmed as the firstelement of the Integrated Global
WaterCycle
Observations(IGWCO) theme at the the 8thsession of the Integrated Global
Observing System Partners (IGOSP) held in Kyoto Japan inNovember 2001.
The goal ofIGOS-P
istoproduce
comprehensive global, regional andnational data and information tosatisfy
theenvironmental
information needs of policymakers
and to support scientific andoperational
environmental
programmes. IGOS-P is comprisedof representation from recognized
Global Observing Systems, theinternational
agencieswhichsponsorthesesystems,
theCommittee on Earth Observation
Satellites (CEOS), the International

Group of Funding Agencies for
Global Change Research (IGFA),
and international global change
research programmes, such as theWorldClimateResearchProgramme (WCRP).
Briefly, the IGWCO objectives are
to provide a framework for guiding
decisionsonpriorities
andstrategies regarding water cycle
observations for- monitoring climate variability andchange- effective water management
through the provision of better
information- sustainable development of theworld's water resources- specification of initial conditions
for weather and climate forecasts.

Structure of C EOPCEOP - A Contribution to Improving thePredictability of the Global Water Cycle andResultant Water Resources
AQUA

TERRA
Baltic Sea Experiment(BALTEX)

Mackenzie GEWEXStudy (MAGS)GEWEX AmericasPrediction Project(GAPP)
North America
Monsoon Experiment(NAME)
Large Scale
Biosphere-Atmosphere
Experiment in Amazonia (LBA)
Monsoon Expriment inSouth America (MESA)GEWEX Asian
Monsoon Experiment(GAME)

Couplingof theTropical Atmosphereand Hydrological Cycle(CATCH)

Murray-Darling Basin
Water Budget Project(MDB)

ADEOS IIENVISATTRMM

CEOP - initiated mid-2001 and focusing on two annual
cycles (2003-2004) - is designed to take advantage of thenew E arth observing satellites, the existing suite ofoperational satellites, and the progress of the GE WEX
continental scale experiments and other W CRP activities
including
CLIVAR(i.e.
NAME,MESA)
andC li C.
The overall objective of the CoordinatedEnhanced Observing Period (CEOP) is toachieve a more accurate determination of thewater cycle in association with climate variability.
The timing of CEOP is coupled to the new seriesof Earth observing satellites and the GEWEXContinental Scale Experiments (CSEs). The
timing is also coupled to other international
activities, such as those planned for the Climate
VariabilityandPredictability(CLIVAR)
Programme, the Working Group on NumericalExperimentation,andtheClimate
andCryosphere (CliC) Project. CEOP objectives aresupported by the Integrated Global Observing
Strategy Partners (IGOS-P), which includes
space agencies and other agencies dealing with
global environmental issues.
CEOP will provide a unique database ofcommon measurements for the coordinatedobservation period. Data from selected
Reference Sites closely linked with the GEWEX
CSEs, and matching Model Output Location
Time Series (MOLTS) and 4DDA analyses fromcooperating Numerical Weather Prediction(NWP) centers will be combined with subsets ofrelevant satellite data into a comprehensive data
set. The CEOP global hydroclimatological data
set will be used to validate satellite hydrology
products and evaluate, develop and eventually
predict water and energy cycle processes
through global and regional models. Based on
the collective data set, studies will be conductedon the regional water and energy budget andboth inter-comparison and inter-connectivity
studies of the monsoon systems around theworld. CEOP will also address defining a path todownscale from global climate to local water
resource application as a next step.

CEOP brings together in-situ, satellite, and model data (withglobal coverage over the same time period) to support key scienceobjectives in climate prediction and monsoon system studies.