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1996 Fiscal Year Final Research Report Summary

REGIONAL AND TEMPORAL VARIATIONS IN PRECIPITATION IN THE EASTERN PART OF THE HIMALAYAS

Research Project

Project/Area Number 07680187
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 自然地理学
Research InstitutionKOCHI UNIVERSITY

Principal Investigator

EGUCHI Takashi  KOCHI UNIVERSITY,FACULTY OF HUMANITIES AND ECONOMICS,ASSOCIATE PROFESSOR, 人文学部, 助教授 (30263966)

Project Period (FY) 1995 – 1996
KeywordsBhutan Himalaya / Monsoon / Intraseasonal variation / Mountain and valley circulation / Precipitation intensity / Heavy rain / Cyclone
Research Abstract

The purpose of this study is to clarify the regional characteristics of intraseasonal variation in precipitation in the eastern part of the Himalayas and its relationship with the Indian summer monsoon. The daily precipitation is analyzed mainly in the Bhutan Himalaya and the results are as follows ;
1.The difference in precipitation between the southern foothills and the intramontane basin in the Bhutan Himalaya depends mainly on the intensity of daily precipitation, and the difference in the intensity of precipitation is considered to be related to two air circulation systems with a different spatial scale. One is the monsoon circulation system on a synoptic scale and the other is the mountain and valley circulation system on a local scale.
2.The precipitation in the Bhutan and Nepal Himalayas is considered to increase (decrease) during the break (active) phase of the Indian summer monsoon in June and July. However, from mid August, the relationship between precipitation in the Bhutan and Nepal Himalayas and the activity of summer monsoon is not clear.
3.The cause of heavy rains in 1989 is the cyclones passing near the Bhutan Himalaya around 18th May and 15th June. The cyclone brings relatively widespread heavy rains in the Bhutan Himalaya and, in the intramontane basin, they have much precipitation.
Based on above results, it is shown that the relationship between the activity of Indian summer monsoon and the precipitation in the Himalayas changes from July to August. Moreover, it should be careful of the damages caused by the cyclone, especially in the intramontane basin of the Bhutan Himalaya.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Eguchi,T.: "Regional Classification of the western Part of the Indochina Peninsula based on annual variation in precipitation" Research Reports of Department of Humanities,Faculty of Humanities and Economics.Kochi University. 4. 1-9 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kawamura,K,Yanase,A.,Eguchi,T.,Mikami,T.,and Barrie,A.: "Enhanced at mospherio transport of soil derived organic matler in spring over the high Arctic." Geophysical Research Letter. 23. 3735-3738 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Eguchi,T.: "Regional Characteristics of the summer monsoon ons et in the Indochina Peninsula" Research Reports of Kochi University. 45(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Eguchi, T.: "Regional Classification of the western part of the Indochina Peninsula based on annual variation in precipitation" Research Reports of Department of Humanities, Faculty of Humanities and Economics, Kochi University. 4. 1-9 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kawamura, K.: "Yanase, A., Eguchi, T., Mikami, T., and Barrie A., Enhanced atmospheric transport of soil derived organic matter is spring over the high Arctic" Geophysical Research Letter. 23. 3735-3738 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Eguchi, T.: "Regional characteristics of the summer monsoon onset in the Indochina Peninsula" Research Reports of Kochi University, 45 (Humanities). (In Printing).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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