1999年广东汛期降水的季节内振荡

唐天毅; 吴池胜; 王安宇; 侯尔滨; 罗会邦

1999年广东汛期降水的季节内振荡

1.
澳门地球物理暨气象局, 澳门, 大潭山
2.
中山大学大气科学系, 广东, 广州, 510275

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出版历程
- 收稿日期: 2006-07-14
- 修回日期: 2007-03-06

AN OBSERVATIONAL STUDY OF INTERASEASONAL VARIATIONS OVER GUANGDONG PROVINCE CHINA DURING THE RAINY SEASON OF 1999

1.
Macao Geophysical and Meteorological Bureau, Macao, China
2.
Department of Atmostpheric Sciences, Sun Yat-sen(Zhongshan) University, Guangzhou 510275, China

摘要

摘要: 根据广东6个代表站和澳门大潭山的降水资料以及NCEP的再分析资料,利用波谱分析法和Marakami的带通滤波技术,分析了1999年4~9月广东降水的季节内振荡(ISO)特征及其与大气环流的ISO之间的联系。结果表明:广东汛期降水的季节内变化的主模是10~20天振荡;850hPa层上影响广东地区的周期为10~20天的低频环流系统有两类传播模型,一类是由中纬度传到广东地区;另一类是来自热带地区,广东降水的10~20天振荡与它们的活动密切相关。
- 季节内变化 /
- 降水 /
- 广东
Abstract: In the present study,intraseasonal variations of precipitation in Guangdong Province of China during the rainy season of 1999 and the accompanying variations of the tropospheric circulation are analyzed with the use of rain data collected by the National Climate Center of China and the NCEP-NCAR reanalysis data.The harmonics analysis reveals that the main component of the intraseasonal variations of the 1999 precipitation is the 10~20-day oscillation.With the 10~20-day filtered 850-hPa wind data over the area of the South China Sea monsoon,it is found that the transient ridges and troughs associated with the 10~20-day oscillation over the Guangdong Province may come from the mid-latitudes or from the tropics and it is considerably responsible for the 10~20-day variations of the 1999 precipitation.
- intraseasonal variations /
- precipitation /
- Guangdong Province

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参考文献(16)

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