| 南亚高压与长江中下游夏季降水异常的关系 |
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| 作者姓名： | 马端良 |
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| 作者单位： | 山东省烟台经济技术开发区气象局 山东烟台 264006 |
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| 摘 要： | 该文利用1951—2013年夏季全国160站降水资料与NCEP/NCAR再分析月平均高度场资料(水平分辨率为2. 5°×2. 5°),选取17个站点代表长江中下游流域,采用合成分析及相关分析等方法,研究了夏季降水量异常与同期及前期5月南亚高压的关系。结果表明,降水量异常偏多年夏季南亚高压中心位势高度明显偏大,位置较为偏西,前期5月南亚高压东西跨度较大,面积偏大;降水量异常偏少年份南亚高压中心位势高度偏小,前期5月中心位于中南半岛上空,面积偏小。夏季南亚高压东伸指数和5月份南亚高压脊线位置与长江中下游流域夏季降水相关性较好,对长江中下游流域夏季降水具有一定的预测作用。
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| 关 键 词： | 长江中下游流域 降水异常 南亚高压 特征参数 |
| 收稿时间： | 2018/1/31 0:00:00 |
| 修稿时间： | 2018/7/2 0:00:00 |
Relationship between South Asian High and SummerSrainfallSanomaly in Middle and Lower reaches of the Yangtze River |
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| Authors: | Ma Duanliang |
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| Institution: | Shandong Yantai Economic and Technological Development Zone Meteorological BureauShandong yantai,264006 |
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| Abstract: | By using of the 1951-2013 summer monthly precipitation data in China and the NCEP/NCAR monthly mean meteorological reanalysis data(horizontal resolution 2.5°×2.5°),select 17 station as Middle and Lower reaches of the Yangtze River. Analyze the relationship between South Asian High(SAH) and SummerSrainfallSanomaly in Middle and Lower reaches of the Yangtze River by adopting the method of synthetic analysis and correlation analysis. Results indicate that in the rainfallSanomaly bullish years, central geopotential of SAH obviouslySon theShighSside, position by west. In May the east-west span is larger, area is larger. in the rainfallSanomaly lower years, central geopotential of SAH is smaller. In May, Center is located in Indochina Peninsula,area is smaller. It is found that in the rainfallSanomaly bullish years, characteristicSparameters of SAH is Quite different with annualSaverage. The precipitation of summer rainfallSanomaly years and Ridge index in May exist significant relation. |
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| Keywords: | Middle and Lower reaches of the Yangtze River rainfallSanomaly SAH characteristicSparameters |
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