| REASONS FOR THE LATE ONSET AND ANOMALOUS SOUTHWARD PERSISTENCE OF THE SOUTH CHINA SEA SUMMER MONSOON IN 2005 |
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| 作者姓名： | 鲍媛媛 琚建华 金荣花 康志明 |
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| 作者单位： | BAO Yuan-yuan,JIN Rong-hua,KANG Zhi-ming(National Meteorological Center, Beijing 100081 China);JV Jian-hua(Yunnan Meteorological Bureau, Kunming 650034 China) |
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| 基金项目： | National Key Fundamental Research Development Project (2004CB418302) |
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| 摘 要： | Features of atmospheric circulation and thermal structures are discussed using the NCAR/NCEP
data to reveal the reasons for the late onset and anomalous southward persistence of the South China Sea
Summer Monsoon (SCSSM) in 2005. The results show that three factors are crucial. First, a strong
Arabian High overlaps with a high-latitude blocking high and channels strong cold air to southern Asia.
Second, the Tibetan Plateau has a bigger snow cover than usual in spring and the melting of snow cools
down the surface. Third, the Somali Jet breaks out at a much later date, being not conducive to convection
over Indochina. The former two factors restrict atmospheric sensible heating over the Tibetan Plateau and
nearby regions while the third one limits latent heating over Indochina. All of the factors slow down
atmospheric warming and postpone the onset of SCSSM. Long after the onset of SCSSM, strong cold air
over India advances the Southwest Monsoon northward slowly, resulting in weaker convection and latent
heating over the Tibetan Plateau and nearby areas. The negative feedback conversely inhibits further
northward movement of Southwest Monsoon.
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REASONS FOR THE LATE ONSET AND ANOMALOUS SOUTHWARD PERSISTENCE OF THE SOUTH CHINA SEA SUMMER MONSOON IN 2005 |
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| BAO Yuan-yuan,JV Jian-hu,JIN Rong-hua and KANG Zhi-ming.REASONS FOR THE LATE ONSET AND ANOMALOUS SOUTHWARD PERSISTENCE OF THE SOUTH CHINA SEA SUMMER MONSOON IN 2005[J].Journal of Tropical Meteorology,2010,16(1):27-34. |
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| Authors: | BAO Yuan-yuan JV Jian-hu JIN Rong-hua and KANG Zhi-ming |
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| Institution: | 1. National Meteorological Center, Beijing 100081 China
2. Yunnan Meteorological Bureau, Kunming 650034 China |
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| Abstract: | Features of atmospheric circulation and thermal structures are discussed using the NCAR/NCEP data to reveal the reasons for the late onset and anomalous southward persistence of the South China Sea Summer Monsoon(SCSSM) in 2005.The results show that three factors are crucial.First,a strong Arabian High overlaps with a high-latitude blocking high and channels strong cold air to southern Asia.Second,the Tibetan Plateau has a bigger snow cover than usual in spring and the melting of snow cools down the surface... |
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| Keywords: | South China Sea summer monsoon Arabian High Somali Jet snow cover |
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