Relationship between the Onset of the South China Sea Summer Monsoon and Abnormal Variations of frontal Precipitation during the First Rainy Period in South China

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Relationship between the Onset of the South China Sea Summer Monsoon and Abnormal Variations of frontal Precipitation during the First Rainy Period in South China

更新时间：2023-12-11

- Relationship between the Onset of the South China Sea Summer Monsoon and Abnormal Variations of frontal Precipitation during the First Rainy Period in South China
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 49, Issue 5, Pages: 127-133(2010)
- 作者机构：
  
  中国气象局广州热带海洋气象研究所//热带季风重点开放实验室,广东,广州,510080
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010，
  
  Published Online：25 September 2010，
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Relationship between the Onset of the South China Sea Summer Monsoon and Abnormal Variations of frontal Precipitation during the First Rainy Period in South China. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 49(5):127-133(2010)
DOI：

Relationship between the Onset of the South China Sea Summer Monsoon and Abnormal Variations of frontal Precipitation during the First Rainy Period in South China. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 49(5):127-133(2010) DOI：

摘要

利用1958-2000年NCEP/ NCAR 再分析日平均资料、中国气象局气候中心常规地面观测日降水资料，分析南海夏季风爆发异常情况下大气结构的变化特征，讨论华南冷空气活动、前汛期锋面降水情况与南海夏季风爆发异常之间的关系。结果表明：① 南海夏季风爆发日期的异常变化主要取决于低层纬向风变化。② 200 hPa以下对流层温度经向梯度逆转较早（晚），并且有（无）从上往下逐渐传播的变化趋势，则南海夏季风爆发偏早（晚）。③ 华南春季冷空气活跃（不活跃），降水偏多（偏少），南海季风爆发偏早（晚）。④ 综合提出了一个关于华南冷空气活动、锋面降水与夏季风爆发之间关系的物理概念模型。

Abstract

The daily NCEP/NCAR reanalyzed data and daily rainfall data during 1958-2000 from the National Climate Center of China Meteorology Administrator are used to analyze dynamic and thermodynamic characteristics under the abnormal onset of South China Sea Summer Monsoon. Relationships among the cold air activity in South China

precipitation in the yearly first rainy period and abnormal onset of the South China Sea Summer Monsoon are explored. The results indicate: 1) the abnormal change of onset dates of the South China Sea Summer Monsoon is mostly decided by zonal wind. 2) The early (late) onset of the South China Sea Summer Monsoon is related to the early (late) reversal of the troposphere temperature meridional gradient under 200 hPa and the trend transmitting downwards. 3) The more active cold air is in spring and the more precipitation there is in South China

the earlier the onset of the South China Sea Summer Monsoon occurs. 4) A synthetic physical concept model about the relationships among South China cold air activity

precipitation in the yearly first rainy period and anomalous onset of the South China Sea Summer Monsoon is presented.

关键词

南海夏季风爆发异常结构变化冷空气前汛期锋面降水

Keywords

South China Sea Summer Monsoonanomalous onsetchange of dynamic and thermodynamic characteristicscold airfrontal precipitation in the yearly first rainy period

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Relationship between Onset of South China Sea Summer Monsoon and South China Frontal Precipitation in the First Raining Period on Climatological Mean

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Institute of Tropical and Marine Meteorology∥Key Open Laboratory for Tropical Monsoon, China Meteorological Administration

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