| 摘要: |
| 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。同时发现,降水量异常年份6-8月南亚高压特征参数中强度指数较多年平均值差异较大,且长江中下游流域夏季降水量与前期5月份南亚高压脊线位置特征参数的相关性较大。 |
| 关键词: 长江中下游流域;降水异常;南亚高压;特征参数 |
| DOI： |
| 投稿时间：2018-01-31修订日期：2018-07-02 |
| 基金项目: |
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| Relationship between South Asian High and SummerSrainfallSanomaly in Middle and Lower reaches of the Yangtze River |
| Ma Duanliang |
| (Shandong Yantai Economic and Technological Development Zone Meteorological BureauShandong yantai,264006) |
| 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. |
| Key words: Middle and Lower reaches of the Yangtze River; rainfallSanomaly; SAH; characteristicSparameters |
