NAME =  Kooiti Masuda  
ORGANIZATION =  Frontier Research Center for Global Change, JAMSTEC  
ADDRESS =  3173-25 Showa, Kanazawa-ku, Yokohama 236-0001  
COUNTRY =  Japan  
PHONE =  +81-45-778-5538  
FAX =  +81-45-778-5706  
E-MAIL =  masuda@jamstec.go.jp  
POSTER_ONLY =  no  
THEME =  T5  
DATE =  05-Aug-04-15:20:47  
ABSID = T5KM05Aug04152047 
TITLE = A review of GAME data in the perspective of water and energy balance study 
AUTHOR_1 = Kooiti Masuda 
INSTITUTION_1 = FRCGC, JAMSTEC 
PRESENTER = AUTHOR_1 
ABSTRACT = To study global energy and water cycle we mainly use global data sets,
but we also need to evaluate and improve them by using more data from
regional and/or experimental observations such as GAME.  Here I review
several achievements of GAME relevant to global water and energy balance
study.


(1) GAME Reanalysis is produced by a collaboration based at Meteorological
Research Institute of Japan Meteorological Agency. It is global meteorological
data assimilation taking experimental observations of GAME, SCSMEX and others
as well as routine observations. It covers 7 months (April to October 1998).
Monthly mean precipitation of the product (model forecasts) is less biased in many regions of
the world than other reanalysis products.  The data set was successfully
used in an atmospheric energy budget study around Tibetan Plateau (Ueda et al.)
and a study of sources of water vapor in Southeast Asia (Yoshimura et al.)


(2) Daily precipitation data have been contributed to GAME from operational
agencies of many countries of Asia.  With the enhanced coverage, spatial
features of precipitation in Southeast Asia related to orography are
revealed much better than in currently available global data sets.
The difference of data has large impact on water balance in some areas
such as the upper Irrawaddy river basin (though station coverage seems to be not
yet sufficient there).


(3) AAN (Asian Automated weather station Network) has made continuous
observations of surface energy fluxes at various locations in Asia.
GAME-Radiation and later SKYNET have made precise observations of
radiative fluxes at the surface.
Comparison of these in-situ data with global data products
(either satellite retrievals or data assimilation products)
is useful for evaluation of global products.
The difference may also due to representativeness problems of in-situ
observations, however.
We need more case studies to have better understanding and
eventually improve the global data sets.