Abstracts for the 6th International GAME Conf.
3-5 December 2004
Kyoto Japan
Monsoon precipitation characteristics over Asia and Western Tropical Pacific Ocean
K. Krishna Reddy (1) , Baio Geng (1), Hiroyuki Yamada (1), Hiroshi Uyeda (2), Ryu
ichi Shirooka (1), Tomoki Ushiyama (1), Suginori Iwasaki (1), Hisayuki Kubota (
1), Takashi Chuda (1), Kensuke Takeuchi (1), Toshiaki Kozu (3), Yuichi Ohno (4)
, Kenji Nakamura (5), D.Naryana Rao (6)
(1) Institute of Observational Research for Global Change (IORGC), Japan Age
ncy for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan
(2) Hydropsheric and Atmospheric Research Center (HyARC), Nagoya University,
Nagoya, Japan/ IORGC, JAMSTEC, Japan
(3) Faculty of Sci. and Engineering, Shimane University, Shimane, Japan
(4) National Institute of Information & Communications Technology (NICT), To
kyo, Japan
(5) Hydropsheric and Atmospheric Research Center (HyARC), Nagoya University,
Nagoya, Japan
(6) National MST Radar Facility, Tirupati, India
The occurrence of deep convection in the Asian regions play an important role in the global circulation, since it transports heat, water vapor, and so on, from the atmospheric boundary layer to the upper troposphere. The vertical distribution of diabatic heating depends on the vertical structure of the convective system; hence it is important to study the vertical structure of the precipitating clouds occurring in the monsoon regions. For this purpose wind profilers operated at five different locations over Asia and Western Tropical Pacific Ocean [at India (Gadanki), China (Dongshan), Thailand (Bangkok) and Japan (Tokyo)] and Palau (Aimeliik) are utilized to understand three-dimensional wind field, convective boundary layer associated with mesoscale precipitating systems. In particular, these wind profilers directly measure the vertical wind component within a convective environment and reveal details about the vertical structure of precipitating cloud systems. In addition, data from Satellite (TRMM PR, GMS IR, and METEOSAT), radiosonde/ rawinsonde and surface meteorological measurements were used to analyze the thermodynamics, detailed precipitation systems. Results from a variety of precipitation systems observed at different locations related to the vertical draft structure and the microphysics. The Summer/winter monsoon precipitating cloud systems are associated with frontal systems, thunderstorms, cumulus convection, flow instability in the jet stream, and the interaction of airflow with topography will be discussed during presentation. Tropical wind profilers and JW disdrometers (Gadanki and Aimeliik) analysis/results show clear seasonal dependence raindrop size distribution characteristics in summer monsoon and winter monsoon. During the summer monsoon often the precipitating systems are associated with lightening and mesoscale convection activities and also short lived (~ 1 – 2 hours) with high intensity of rainfall. Whereas winter Monsoon cloud systems are cyclonic in nature and occurrence of stratifrom precipitation is dominant. Our study also focuses on understanding the key components of the South and East Asia monsoon system and their variability within the context of the evolving land surface-atmosphere-ocean within the boundary layer.
Submittal Information
| Name : | Date : |
Krishnareddigari Krishna Reddy | |
| Organization : | Theme : |
Institute of Observational Research for Global Change (IORGC)/Japan Agency for Marine-Earth Science and Technology (JAMSTEC) | |
| Address : | Presentation : |
3173-25 Showamachi, Kanazawa-ku, Yokohama City,Kanagawa 236-0001 | |
| Country : | Abstract ID : |
| |
| Phone : | Fax : |
| |
| E-mail : | |
| |