Marine Ecosystems Research Department - jamstec japan agency ...

Japan Marine Science and Technology Center
Frontier Observational Research System for Global Change
Fig.16 Time-height section of reflectivity observed by a Doppler
radar in 2002.
shipped back to Japan. Many precipitation systems
observed in showed different characteristics from
those observed in the last year (Fig.). Data from two
years' observations provided a good opportunity for
studying various processes of cloud and precipitation
systems in the downstream region of the Yangtze River.
For the observation in the western tropical Pacific
region, refer to the section of Air-Sea Interaction Group
of Climate Variations Observational Research Program.
Atmospheric Composition Research Task Team
The Atmospheric Composition Research Task Team
was set up in FY to execute a sub-sub theme of the
Category of MEXT RR Project for Sustainable
Coexistence of Human, Nature and the Earth.
In FY, an Implementing Arrangement was
concluded with the Institute of Atmospheric Physics,
Chinese Academy of Sciences in order to facilitate the
observation of the spatial distribution and temporal
variability of O
and CO in China, a major emission
area in East Asia. Three potential sites, Mt. Taishan,
Mt. Huashan and Mt. Huangshan, were selected as
observation sites and a visit to Mt. Taishan and Mt.
Huashan was made to investigate the feasibility of
observation. An instrument for continuous measurement
of O
based on UV absorption method and an
instrument for CO based on non-dispersive infrared
absorption were installed at Mt. Taishan and the
observation has been initiated. For the purpose of
obtaining the background data to East Asia, research
cooperation with Limnological Institute, Russian
Academy of Sciences, was made to facilitate the
observation of O
and CO at Mondy station in East
Siberia near lake Baikal.
Further development of the Laser Induced
Fluorescence (LIF) instrument for the OH/HO
measurement
was made, and sensitivity was improved to
obtain the same level of detection limit as the other
world top class instruments.
(a) Variability of tropospheric ozone in Asia and its
impact on global warming
This research aims at carrying out an atmospheric
chemistry observation related to tropospheric ozone in
Asia for the purpose of verification and development
of high precision global chemical transport model.
The research subject of this study includes:
( i ) Continuous measurements of tropospheric
ozone (O
) and carbon monoxide (CO) in
China, Siberia and Central Asia to obtain seasonal
variation of their concentration.
(ii) Intensive campaign including direct measurement
of HOx (OH and HO
) radicals to verify
tropospheric photochemistry theory.
(iii) Preparation of emission inventory data for
future emission of ozone precursors until .
Observation and research at International Arctic
Research Center
The International Arctic Research Center (IARC)
aims to understand natural and anthropogenic variations
occurring in the Arctic region and predict their
impacts. Its FY activities are described below.
(I) Coupled Ocean-Ice-Atmosphere System Group
The Coupled Ocean-Ice-Atmosphere System Group
aims to elucidate interaction among the ocean, sea ice
and atmosphere so as to shed light on the complex Arctic
Ocean climatic system. In FY , the following observations
were undertaken in parts of the Arctic region
with close relationship with the Pacific Ocean.
) Tracking of freshwater distribution by source through
the use of stable oxygen isotopes and barium (Ba)
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