Marine Ecosystems Research Department - jamstec japan agency ...

Japan Marine Science and Technology Center
Frontier Research System for Global Change
Estimated Po temp (K) & Temp transport (PWT) at Equator
(Jan)
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Estimated Po temp (K) & Temp transport (PWT) at Equator
(Jul)
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Fig.35 State estimation of seasonally-varying heat balance in the
upper equatorial Pacific (upper: January; lower: July).
Arrows denote heat fluxes (unit in PWT).
adT at sigma 0.12
6JAN3-
11JAN3-
16JAN3-
21JAN3-
26JAN3-
0 60E 120E 180 120W 60W 0
-0.025 -0.015 -0.005 0.005 0.015 0.025
-0.02 -0.01 0.01 0.02
Fig.36 Sensitivity to a velocity fluctuation input in the upper equatorial
troposphere(information of specified fluctuations is
calculated backward in time).
of the velocity disturbance can be traced back to the
Asian continent, in good agreement with observations.
These aspects of our D-VAR DA system underline
Fig.37 Product server with LAS constructed in Theme (5).
its usefulness for state estimation and prediction of
climate change.
Regional nonhydrostatic models for atmosphere and
ocean in Theme have been constructed by Kyoto
University's group and showed good performance in
simulating cumulus convection processes in the tropical
atmosphere and eddy transport in the ocean, respectively.
The nesting method with global-scale GCMs is
currently underway.
The relevant prototype of distributed sheared-database
system in Theme has been constructed by the
joint group of AESTO and IPRC (PI is Dr. Waseda of
IPRC). In particular, the Live Access Server (LAS),
which is a highly configurable Web server designed to
provide flexible access to geo-referenced scientific
data, allows us to utilize distributed datasets as a unified
virtual data base through the DODS networking
(Figure ). This server system is anticipated to work
as a very useful basic tool in our DA system.
The results shown above indicate that the research
objectives planned in have been successfully
achieved, thereby suggesting good prospects for our
research development.
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