MAHASRI(Monsoon Asian Hydro-Atmosphere Scientific
Research and Prediction Initiative)
Jun Matsumoto
Dept. of Earth & Planetary Sci., Univ. Tokyo, JAMSTEC/ IORGCChairman of the Post-GAME Planning Working GroupDataManagement

MAHASRI

Water andEnergy Budget
Studies
Worldwide
Integrated Studyof Extremes
Stable Water
IsotopeIntercomparison
Group
Transferability
Water Resource
Applications
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CEOP

IAEA

Four Regional
Components ofMAHASRIMAHASRI Objective"To establish hydro-meteorologicalprediction system, particularly up toseasonal time-scale, through betterscientific understanding of Asian monsoon
variability".

Key Science Issues (1)• Atmosphere-ocean-land interactions in theAsian monsoon system• Role of orography on monsoon rainfall• Scale-interactions among diurnal, synoptic,intraseasonal and seasonal variability of Asianmonsoon• Interactions of surface and boundary layer
processes with convective cloud system• Comparisons of hydro-meteorologicalcharacteristics among regional monsoon subsystems

Key Science Issues (2)• Effect of human influences (i.e., aerosols, landuse change, and greenhouse-gas increase) on
hydro-meteorological variations in Asianmonsoon regions• Down-scaling and up-scaling for/with regionalhydro-meteorological modeling and forecast• Transferability of land-surface hydrologicalmodels and parameters for prediction ofungauged basins• Incorporation of new technologies forobservation and computation

International cooperation strategies• Facilitate and/or improve hydro-meteorologicalobservations in Asian monsoon countries in
conjunction with GEOSS• Cooperate with CEOP-II by observations, data andhydrometeorelogical studies in Asian monsoon• Contribute IPY by conducting intensive observations in
Asian monsoon region• Capacity building for observation, analysis, dataintegration and modeling• Data exchange to establish an integrated databaseDifferences from GAME？
• More concrete collaboration with Asianhydrometeorological agencies and research institutes→ Present proto-type model for thehydrometeorological prediction system• Expansion the target field not only air-land interaction
but also air-land-sea interaction, thus closer
collaboration with CLIVAR community• Expansion of the target area over the Maritime
Continent, Western Pacific, and India, while retreat
from Siberia• Targeting also winter monsoon• Main time-scale: weekly to seasonal for prediction,
year-to-year variability for research including longterm data rescueFramework
WCRP

THORPEXSPARC

CliCSTARTGWSPGEWEXCLIVAR

MAHASRI

PUBCEOP

MAHASRI International Science Committee (MISC)

National National National National National National National National
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MAHASRI and related Japanese Projects (JEPP)JEPP: Tibet
MAHASRI Japan EOS Promotion Program

JEPP: Indochina

JEPP: Indian
Ocean

JEPP: ThailandJEPP: Maritime
continentTime Schedule
Research phases:• September, 2005-September, 2006: Planningand preparation phase• September, 2006-March, 2010: Researchphase I (2006-07: Build-up new observationsystems)• 2008-09: IOP-year in conjunction with IPY (?)• 2011-2015: Research phase II