| INTERDECADAL VARIATIONS OF INTERACTION BETWEEN NORTH PACIFIC SSTA AND EAST ASIAN SUMMER MONSOON |
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| 作者姓名： | 李峰 何金海 |
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| 作者单位： | Nanjing Institute of Meteorology |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金 |
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| 摘 要： | Identification of key SST zones is essential in predicting the weather / climate systems in East
Asia. With the SST data by the U.K. Meteorological Office and 40-year geopotential height and wind fields by
NCAR / NCEP, the relationship between the East Asian summer monsoon and north Pacific SSTA is studied,
which reveals their interactions are of interdecadal variation. Before mid-1970's, the north Pacific SSTA acts
upon the summer monsoon in East Asia through a great circle wavetrain and results in more rainfall in the
summer of the northern part of China. After 1976, the SSTA weakens the wavetrain and no longer influences
the precipitation in North China due to loosened links with the East Asian summer monsoon. It can be drawn
that the key SST zones having potential effects on the weather / climate systems in East Asia do not stay in one
particular area of the ocean but rather shift elsewhere as governed by the interdecadal variations of the air-sea
interactions. It is hoped that the study would help shed light on the prediction of drought / flood spans in China.
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| 关 键 词： | northern Pacific SST East Asian summer monsoon East Asian summer land-sea temperature difference (LSTD) general circle wavetrain |
INTERDECADAL VARIATIONS OF INTERACTION BETWEEN NORTH PACIFIC SSTA AND EAST ASIAN SUMMER MONSOON |
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| LI Feng and HE Jin-hai.INTERDECADAL VARIATIONS OF INTERACTION BETWEEN NORTH PACIFIC SSTA AND EAST ASIAN SUMMER MONSOON[J].Journal of Tropical Meteorology,2001,7(1):41-52. |
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| Authors: | LI Feng and HE Jin-hai |
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| Institution: | Nanjing Institute of Meteorology, |
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| Abstract: | Identification of key SST zones is essential in predicting the weather / climate systems in East Asia. With the SST data by the U.K. Meteorological Office and 40-year geopotential height and wind fields by NCAR / NCEP, the relationship between the East Asian summer monsoon and north Pacific SSTA is studied, which reveals their interactions are of interdecadal variation. Before mid-1970's, the north Pacific SSTA acts upon the summer monsoon in East Asia through a great circle wavetrain and results in more rainfall in the summer of the northern part of China. After 1976, the SSTA weakens the wavetrain and no longer influences the precipitation in North China due to loosened links with the East Asian summer monsoon. It can be drawn that the key SST zones having potential effects on the weather / climate systems in East Asia do not stay in one particular area of the ocean but rather shift elsewhere as governed by the interdecadal variations of the air-sea interactions. It is hoped that the study would help shed light on the prediction of drought / flood spans in China. |
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| Keywords: | northern Pacific SST East Asian summer monsoon East Asian summer land-sea temperature difference
(LSTD) general circle wavetrain |
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