| On the relationship between convection intensity of South China Sea summer monsoon and air-sea temperature difference in the tropical oceans |
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| 作者姓名： | LIN Ailan LIANG Jianyin GU Dejun WANG Dongxiao |
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| 作者单位： | [1]GuangzhouInstituteofTropicalandMarineMeteorologyofChinaMeterologicalAdministration,Guangzhou,510080,China [2]KeyLaboratoryofTropicalMarineEnviromentaldynamics,SouthChinaSeaInstituteofOceanology,ChineseAcademyofSciences,Guangzhou510301,China |
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| 摘 要： | The annual, interannual and inter-decadal variability of convection intensity of South China Sea (SCS) summer monsoon and air-sea temperature difference in the tropical ocean is analyzed, and their relationship is discussed using two data sets of 48-a SODA (simple ocean data assimilation) and NCEP/NCAR. Analyses show that in wintertime Indian Ocean (WIO), springtime central tropical Pacific (SCTP) and summertime South China Sea-West Pacific (SSCSWP), air-sea temperature difference is significantly associated with the convection intensity of South China Sea summer monsoon. Correlation of the inter-decadal time scale (above 10 a) is higher and more stable. There is inter-decadal variability of correlation in scales less than 10 a and it is related with the air-sea temperature difference itself for corresponding waters. The inter-decadal variability of the convection intensity during the South China Sea summer monsoon is closely related to the inter-decadal variability of the general circulation of the atmosphere. Since the late period of the 1970s, in the lower troposphere, the cross-equatorial flow from the Southern Hemisphere has intensified. At the upper troposphere layer, the South Asian high and cross-equatorial flow from the Northern Hemisphere has intensified at the same time. Then the monsoon cell has also strengthened and resulted in the reinforcing of the convection of South China Sea summer monsoon.
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| 关 键 词： | 海空温差 热带海洋气候 季风 南海 |
| 收稿时间： | 2003/10/11 0:00:00 |
| 修稿时间： | 3/6/2004 12:00:00 AM |
On the relationship between convection intensity of South China Sea summer monsoon and air-sea temperature difference in the tropical oceans |
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| LIN Ailan,LIANG Jianyin,GU Dejun,WANG Dongxiao.On the relationship between convection intensity of South China Sea summer monsoon and air-sea temperature difference in the tropical oceans[J].Acta Oceanologica Sinica,2004,23(2):267-278. |
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| Authors: | LIN Ailan LIANG Jianyin GU Dejun and WANG Dongxiao |
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| Institution: | 1.Guangzhou Institute of Tropical and Marine Meteorology of China Meterological Administration, Guangzhou, 510080, China2.Key Laboratory of Tropical Marine Enviromental dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| Abstract: | The annual, interannual and inter-decadal variability of convection intensity of South China Sea (SCS) summer monsoon and air-sea temperature difference in the tropical ocean is analyzed, and their relationship is discussed using two data sets of 48-a SODA (simple ocean data assimilation) and NCEP/NCAR. Analyses show that in wintertime Indian Ocean (WIO), springtime central tropical Pacific (SCTP) and summertime South China Sea-West Pacific (SSCSWP), air-sea temperature difference is significantly associated with the convection intensity of South China Sea summer monsoon. Correlation of the inter-decadal time scale (above 10 a) is higher and more stable. There is inter-decadal variability of correlation in scales less than 10 a and it is related with the air-sea temperature difference itself for corresponding waters. The inter-decadal variability of the convection intensity during the South China Sea summer monsoon is closely related to the inter-decadal variability of the general circulation of the atmosphere. Since the late period of the 1970s, in the lower troposphere, the cross-equatorial flow from the Southern Hemisphere has intensified. At the upper troposphere layer, the South Asian high and cross-equatorial flow from the Northern Hemisphere has intensified at the same time. Then the monsoon cell has also strengthened and resulted in the reinforcing of the convection of South China Sea summer monsoon. |
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| Keywords: | tropical oceans air-sea temperature difference South China Sea summer monsoon convection Convec-tion intensity |
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