1996 Fiscal Year Final Research Report Summary
ANALYSIS OF PRECIPITATION SYSTEMS IN THE TROPICS AND SUB-TROPICS
| Project/Area Number |
06302026
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 総合 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | THE UNIVERSITY OF TOKYO |
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Principal Investigator |
NITTA Tsuyoshi CENTER FOR CLIMATE SYSTEM RESEARCH,PROFESSOR UNIV.OF TOKYO, 気候システム研究センター, 教授 (00014762)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Kuranoshin INSTITUTE FOR HYDROSPHERIC-ATMOSPHERIC SCIENCES,NAGAYA UNIV.RESEARCH ASSOCIATE, 大気・水圏科学研究所, 助手 (90191981)
KODAMA Yasumasa HIROSAKI UNIVERSITY ASSOCIATE PROFESSOR, 理学部, 助教授 (30205421)
SHINODA Masato DEP.OF GEOGRAPHY,TOKYO METROPOLITAN UNIV.ASSOCIATE PROFESSOR, 理学部, 助教授 (30211957)
MATSUMOTO Jun DEP.OF GEOGRAPHY,UNIV.OF TOKTO ASSOCIATE PROFESSOR, 大学院・理学系研究科, 助教授 (80165894)
SATO Kaoru DEP.OF GEOPHYSICS,KYOTO UNIV.RESEACH ASSOCIATE, 大学院・理学研究科, 助手 (90251496)
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| Project Period (FY) |
1994 – 1996
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| Keywords | PRECIPITATION IN THE TROPICS / SATELLITE MEASUREMENTS / PRECIPITATION RADAR / CLOUD CLUSTER / BAIU-FRONT |
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| Research Abstract |
(1) THERE EXIST DIURNAL VARIATIONS OF CONVECTIVE ACTIVITY IN THE TROPICS.CHARACTERISTIC FEATURES OF DIURNAL VARIATIONS ARE DIFFERENT BETWEEN OVER LANDS AND OCEANS.
(2) IT WAS REVEALED BY THE TOGA-COARE SPECIAL UPPER-AIR OBSERVATIONS THAT THERE EXIST SHORT-PERIOD DISTURBANCES IN THE TROPICAL LOWER STRATOSPHERE.
(3) ONSET AND RETREAT OF RAINY SEASON OVER INDOCHINA PENINSULA ARE ANALYZED BY USING SURFACE DAILY PRECIPITATION DATA AND SATELLITE OLR DATA.
(4) THE RECENT DECREASING TRENDS OF PRECIPITATION OVER SAHEL ARE NOT DUE TO NORTH-SOUTH MOVEMENT OF RAIN-BELTS,BUT DUE TO DECREASE OF TOTAL RAINFALL OVER THE RAIN-BELTS.
(5) FORMATION PROCESSES OF BAIU-FRONT OVER THE CHINA CONTINENT IN JUNE OF 1992 WERE ANARYZED.ATMOSPHERIC CIRCULATIONS AROUND THE TIBETAN PLATEAU PLAY AN IMPORTANT ROLE.
(6) IT WAS FOUND BY THE NUMERICAL EXPERIMENTS THAT HEAT SOURCES IN THE TROPICS PLAY AN IMPORTANT ROLE IN THE FORMATION OF THE PRECIPITATION BELTS IN THE SUBTROPICS.
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