本文關(guān)鍵詞：厄爾尼諾年西北太平洋異常反氣旋的年際變化特征及其影響　出處：《氣象學報》2017年04期 　論文類型：期刊論文

  更多相關(guān)文章： 厄爾尼諾 西北太平洋異常反氣旋 太平洋西部型 北極濤動 東亞-太平洋型

【摘要】：基于1901—2000年多種海-氣資料,分析了厄爾尼諾成熟年冬季—初夏西北太平洋異常反氣旋(WNPAC)的年際變化特征及其對東亞氣候的影響。結(jié)果表明,無論是厄爾尼諾事件成熟期的冬季還是次年的春季和初夏,WNPAC的年際變化主要存在兩個空間變化型,即反映其強度變化的經(jīng)驗正交函數(shù)分解第1模態(tài)和反映其位置變化的第2模態(tài)。厄爾尼諾成熟年冬季W(wǎng)NPAC強度不僅與赤道中東太平洋海溫異常有關(guān),而且與太平洋西部(WP)型遙相關(guān)的強度有關(guān),而其位置的變化則主要與西北太平洋局地海溫異常以及北極濤動(AO)有關(guān);次年春季,WNPAC的強度除了與赤道中東太平洋海溫異常和太平洋西部型遙相關(guān)存在顯著相關(guān)外,還與赤道大西洋海溫異常有關(guān),而其位置的變化則主要與西北太平洋局地海溫異常和太平洋西部型遙相關(guān)有關(guān);次年初夏,WNPAC強度主要與西北印度洋和西南印度洋的海溫異常以及東亞-太平洋(EAP)型遙相關(guān)的強度有關(guān)。進一步分析表明,成熟年冬季—初夏WNPAC的強度和位置的變化均可對東亞地區(qū)降水異常分布產(chǎn)生影響,這對預(yù)測厄爾尼諾事件發(fā)生后冬季及后期春、夏季節(jié)東亞地區(qū)降水異常分布具有一定的指示意義。此外,次年初夏,WNPAC強度變化與西北太平洋臺風發(fā)生頻數(shù)存在顯著負相關(guān),即WNPAC越強,臺風發(fā)生的頻數(shù)越少,反之亦然。
[Abstract]:Based on a variety of sea and air data from 1901-2000. The interannual variation characteristics of the anomalous anticyclone WNPAC in the Northwest Pacific Ocean in the winter and early summer of El Nino mature year and its influence on the climate of East Asia are analyzed. The interannual variation of WNPAC in spring and early summer of El Nino event in winter or in spring and early summer of next year mainly has two spatial variation patterns. That is, the empirical orthogonal function decomposes the first mode and the second mode reflects the change of its position. The WNPAC intensity in winter of El Nino mature year is not only related to the SST anomaly in the equatorial Middle East Pacific Ocean. Moreover, it is related to the intensity of the WP- type teleconnection in the western Pacific, and the change of its location is mainly related to the local SST anomalies in the Northwest Pacific Ocean and the Arctic Oscillation (AOA). The intensity of WNPAC in the next spring is related to the SST anomalies in the equatorial Middle East Pacific Ocean and the western Pacific Ocean, as well as to the SST anomalies in the equatorial Atlantic Ocean. The change of its location is mainly related to the local SST anomaly in the Northwest Pacific and the teleconnection of the western Pacific. The WNPAC intensity in early summer is mainly related to the SST anomalies in the Northwest Indian Ocean and the South-West Indian Ocean and the teleconnection of EAP-type in the East Asia Pacific Ocean. The intensity and location of WNPAC in winter and early summer of mature year can affect the anomalous distribution of precipitation in East Asia, which can predict the winter and late spring after El Nino event. In addition, the intensity change of WNPAC in early summer next year has a significant negative correlation with the frequency of typhoon occurrence in the Northwest Pacific Ocean, that is, the stronger the WNPAC. The fewer typhoons occur, and vice versa.
【作者單位】： 南京信息工程大學氣象災(zāi)害教育部重點實驗室和氣象災(zāi)害預(yù)報預(yù)警與評估協(xié)同創(chuàng)新中心;大氣科學與環(huán)境氣象國家級教學示范中心(南京信息工程大學);
【基金】：國家自然科學基金項目(41575077、41490643) 江蘇省333高層次人才培養(yǎng)工程(BRA2015290)
【分類號】：P732
【正文快照】： 1.南京信息工程大學氣象災(zāi)害教育部重點實驗室和氣象災(zāi)害預(yù)報預(yù)警與評估協(xié)同創(chuàng)新中心,南京,2100442.大氣科學與環(huán)境氣象國家級教學示范中心(南京信息工程大學),南京,2100441.Key Laboratory of Meteorological Disaster of Ministry of Education and Collaborative Innovatio

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