2004 Fiscal Year Final Research Report Summary
Observational Study for Precipitation Characteristic and its interaction with local circulation over Indonesian Maritime Continent
| Project/Area Number |
14595007
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
水循環システム
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| Research Institution | Independent Administrative Institution, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) |
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Principal Investigator |
MORI Shuichi JAMSTEC, IORGC, Sub-Leader, 地球環境観測研究センター, サブリーダー (00344309)
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| Co-Investigator(Kenkyū-buntansha) |
HAMADA Jun-ichi JAMSTEC, IORGC, Research Scientist, 地球環境観測研究センター, 研究員 (50359212)
YAMANAKA Manabu Kobe University, GSST, Professor, 大学院・自然科学研究科, 教授 (30183982)
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| Project Period (FY) |
2002 – 2004
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| Keywords | Tropical Meteorology / Indonesian Maritime Continent / Convective Diurnal Cycle / Tropical rainfall Measuring Mission (TRMM) / Radar Observation / Rawinsonde Observation / Meso-scale Convective System (MCS) / Local Circulation |
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| Research Abstract |
The objective of this research is to clarity the distribution and variability of precipitating activity which is one of the basic elements of the water and energy circulation over Indonesian maritime continent. In particular, we carried out the following four studies : 1)Analyze the rainfall diurnal cycle by using Tropical Rainfall Measuring Mission(TRMM) satellite data, 2)Examine local circulations based on intensive multi-points rawinsonde observations over Sumatera Island, 3)Observe maritime convections with R/V Mirai over the eastern Indian Ocean, and 4)Discuss the interaction between variations of convective activity and local circulations.
In the first fiscal year (FY2002), we established the research environment as follows : 1)A computer with huge data storages was set up required for TRMM data analysis, 2)Observational equipment were installed at small island which is located 100km off Sumatera Island, and 3)Intensive rawinsonde observation data in the last fiscal year (FY2001)
… More
were archived for analysis.
In the second fiscal year (FY2003), we found 1)diurnal land-sea rainfall peak migrations which advance towards inland (offshore) region in the daytime (nighttime) staring from the southwestern coastline of Sumatera Island, 2)convections are generated along the coastline triggered by an interaction between local and large-scale (southwesterly monsoon) circulations, and 3)diurnal wind variations in the lower to middle troposphere is modified significantly by the rainfall peak migrations, too.
In the final fiscal year (FY2004), we concluded the research as follows : 1)Characteristics of convective activity over the eastern Indian Ocean were clarified for intraseasonal variation (ISV) active and inactive phases, 2)Seasonal variation of the rainfall peak migrations in relation to Inter Tropical Convergence Zone (ITCZ) were discussed, and 3)We have just started further study for mechanism of traveling convections modulated over ocean, islands, and land by using a regional climate model. Less
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[Journal Article] Diurnal land-sea rainfall peak migration over Sumatera Island, Indonesian maritime continent observed by TRMM satellite and intensive rawinsonde soundings.2004
Author(s)
Mori, S., Hamada J.-I., Y.I.Tauhid, M.D.Yamanaka, N.Okamoto, F.Murata, N.Sakurai, H.Hashiguchi, T.Sribimawati
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Journal Title
Mon.Wea.Rev. 132
Pages: 2021-2039
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Vertical moisture transport above the mixed layer around the mountains in western Sumatra.2004
Author(s)
Sasaki, T., P.Wu, S.Mori, J.-I.Hamada, Y.I.Tauhid, M.D.Yamanaka, T.Sribimawati, T.Yoshikane, F.Kimura
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Journal Title
Geophys.Res.Lett. 31, L08106
Pages: doi:10.1029/2004GL019730
Description
「研究成果報告書概要(欧文)」より
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