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      氣候變化研究進(jìn)展 ?? 2007, Vol. 03 ?? Issue (02): 74-079.

      ? 研究短論 ? 上一篇    下一篇

      中國(guó)南方春季大尺度大氣水汽匯時(shí)空變化特征

      簡(jiǎn)茂球 秦曉昊 喬云亭 溫之平   

      1. 中山大學(xué)環(huán)境科學(xué)與工程學(xué)院大氣科學(xué)系
      • 收稿日期:2006-09-04 修回日期:2006-12-22 出版日期:2007-03-30 發(fā)布日期:2007-03-30
      • 通訊作者: 簡(jiǎn)茂球

      Spatial and Temporal Variations of Large-scale Atmospheric Moisture Sinks over Southern China in Spring

        

      • Received:2006-09-04 Revised:2006-12-22 Online:2007-03-30 Published:2007-03-30

      摘要: 用1958-2004年NCEP/NCAR再分析資料分析了中國(guó)南方春季大尺度大氣水汽匯的時(shí)空變化特征。結(jié)果表明:華南中東部、廣西北部-湖南西部-貴州東部地區(qū)是中國(guó)南方春季水汽匯的兩個(gè)主要變異中心區(qū)。華南中東部春季水汽匯具有明顯的年際和年代際變化特征,并以年代際方差占優(yōu);廣西北部-湖南西部-貴州東部地區(qū)春季水汽匯以年際變化為主。華南中東部以及廣西北部-湖南西部-貴州東部地區(qū)水汽匯的強(qiáng)度異常與東亞上空水汽輸送異常導(dǎo)致上述地區(qū)垂直積分的水汽通量輻合的異常密切相關(guān),當(dāng)中國(guó)南方上空有西南(東北)風(fēng)水汽通量距平,即西南風(fēng)水汽輸送增強(qiáng)(減弱)時(shí),則上述地區(qū)上空的水汽匯偏強(qiáng)(偏弱)。

      關(guān)鍵詞: 中國(guó)南方, 大氣水汽匯, 時(shí)空變化, 春季

      Abstract: The spatial and temporal variations of large-scale atmospheric moisture sinks over southern China in spring during 1958-2004 are studied based on the NCEP/NCAR reanalysis data. The results reveal that the two main anomalous centers of moisture sinks lay in the central and eastern parts of South China, and the border region of Guangxi, Hunan and Guizhou Provinces, respectively. The first anomalous center showed both remarkably interannual and interdecadal variations with the interdecadal variance being dominant, while the second center mainly displayed interannual variation. When the southwesterly (northeasterly) moisture flux over southern China and its vicinity increased, then more (less) water vapor was transported from the low latitudes to the atmosphere over southern China, which resulted in strong (weak) atmospheric moisture sinks over the above-regions in southern China.

      Key words: southern China, atmospheric moisture sink, spatial and temporal variations, spring

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