国产综合在线观看视频,国产精品原创视频,亚洲国产熟亚洲女视频,一级风流片a级国产

       

      氣候變化研究進(jìn)展 ?? 2008, Vol. 04 ?? Issue (001): 17-20.

      ? 研究短論 ? 上一篇    下一篇

      對中國東部夏季降水有重要影響的一種東亞遙相關(guān)型

      濮冰 王紹武1 朱錦紅1,2   

      1. 1 北京大學(xué)物理學(xué)院大氣科學(xué)系 北京大學(xué)物理學(xué)院大氣科學(xué)系; 2 Illinois State Water Survey, University of Illinois at Urbana-Champaign, Illinois, USA 
      • 收稿日期:2007-04-13 修回日期:2007-10-08 出版日期:2008-01-30 發(fā)布日期:2008-01-30
      • 通訊作者: 濮冰

      An East Asian Teleconnection Mode in Relation to Summer Precipitation in Eastern China

      • Received:2007-04-13 Revised:2007-10-08 Online:2008-01-30 Published:2008-01-30

      摘要: 利用重建的1880-1950年500 hPa高度場(chǎng)資料和1951-2004年的NCEP/NCAR再分析資料,分析了年際尺度上東亞地區夏季大氣環(huán)流變化特征。結果表明:夏季在東亞沿岸存在一個(gè)明顯的自北向南的正-負-正環(huán)流模態(tài),即鄂霍次克海阻塞高壓與副熱帶高壓存在一種同向變化、而它們之間區域的高度場(chǎng)為反向變化的遙相關(guān)關(guān)系;同時(shí)分析了這種大氣環(huán)流模態(tài)與1880-2004年中國東部地區夏季降水的關(guān)系。在年際尺度上,正-負-正的環(huán)流模態(tài)與長(cháng)江中下游地區和東北的降水有很好的正相關(guān),當夏季的環(huán)流處在阻塞高壓偏強,且副熱帶高壓偏南偏強、日本及其以東地區上空高度場(chǎng)偏低時(shí),中國長(cháng)江中下游地區和東北降水偏多。

      關(guān)鍵詞: 東亞大氣環(huán)流, 夏季降水, 年際變化

      Abstract: Using the reconstructed 500 hPa geopotential height data in 1880-1950 and the 500 hPa geopotential height reanalysis data from NCEP/NCAR in 1951-2004, the characteristics of the atmospheric circulation in East Asia on the interannual scale were analyzed. A prominent meridional teleconnection mode of 500 hPa positive-negative-positive height anomaly (P-N-P) from north to south was found along the east-coast of East Asia in summer. The mode reflects the in-phase variations in Okhotsk blocking high and west Pacific subtropical high. The relationship of the circulation mode with the summer precipitation in eastern China was also studied. The results show that the P-N-P anomaly circulation mode correlates well with the precipitation in the middle and lower reaches of the Yangtze River and Northeast China on the interannual scale. When the blocking high becomes stronger, and the subtropical high locates southward and is stronger than normal, the precipitation in the middle and lower reaches of the Yangtze River and Northeast China is above normal.

      Key words: Circulation in East Asia, summer preciation, interannual variation

      中圖分類(lèi)號: 

      京ICP備11008704號-4
      版權所有 © 《氣候變化研究進(jìn)展》編輯部
      地址:北京市海淀區中關(guān)村南大街46號 郵編:100081 電話(huà)/傳真:(010)58995171 E-mail:accr@cma.gov.cn
      本系統由北京瑪格泰克科技發(fā)展有限公司設計開(kāi)發(fā) 技術(shù)支持:support@magtech.com.cn