| 南海夏季风暴发过程的低频特征 |
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| 引用本文： | 宋焱云,谢安,毛江玉,叶谦.南海夏季风暴发过程的低频特征[J].海洋学报,2000,22(2):35-40. |
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| 作者姓名： | 宋焱云 谢安 毛江玉 叶谦 |
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| 作者单位： | 1.北京大学地球物理系, 暴雨监测和预测国家实验室, 北京100871 |
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| 基金项目： | 本文得到国家科技部攀登A“南海季风试验研究”项目和国家自然科学基金(编号：49875016)联合资助． |
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| 摘 要： | 应用1979～1996年共18a的NOAA卫星OLR资料及NCEP/NCAR再分析850hPa风场资料,分析了夏季南海地区及南海季风暴发过程的某些低频特征。认为北半球夏季南海地区的低频活动较活跃,并且具有明显的年际变化,这种年际变化同南海季风的暴发时间有联系。南海地区的低频振荡在南海季风暴发后增强。通过对18a 及K*的时段叠加合成图的分析,发现南海夏季风的暴发同赤道印度洋低频振荡的东传及西太平洋低频扰动西传有密切联系,南海夏季风暴发期间南海地区将印度洋与西太平洋之间的低频活动联系在一起。
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| 关 键 词： | 南海地区 南海季风暴发 低频振荡 |
| 收稿时间： | 1998/4/26 0:00:00 |
| 修稿时间： | 1998-04-26 |
Characteristics of low-frequency oscillations during summer monsoon onset over the South China Sea |
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| Song Yanyun,Xie An,Mao Jiangyu and Ye Qian.Characteristics of low-frequency oscillations during summer monsoon onset over the South China Sea[J].Acta Oceanologica Sinica (in Chinese),2000,22(2):35-40. |
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| Authors: | Song Yanyun Xie An Mao Jiangyu and Ye Qian |
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| Institution: | 1.Department of Geophysics, Peking University, Laboratory for Severe Storm Research, Beijing 1008712.Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | The NOAA OLR data and NCEP/NCAN reanalysis wind data at 850 hPa from1979 to 1996 were used to analyze the characteristics of low-frequency oscillations (LFO) over the South China Sea (SCS) during the summer monsoon onset. It was demonstrated that the LFO over SCS was active in summer and had obvious interannual variability that was related with the monsoon onset over SCS. The LFO over SCS intensified after the monsoon onset. From 18 a composite analysis of OLR and K *, we found that the monsoon onset over SCS was closely related with the eastward LFO propagation over the Indian Ocean and westward LFO propagation over the Pacific Ocean, and the LFOs over Indian Ocean and Pacific Ocean were linked together in SCS region during the monsoon onset over SCS. |
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| Keywords: | Summer monsoon onset SCS low-frequency oscillations |
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