west wind drift 中文意思是什麼
west wind drift
解釋
南極繞極流-
The reverse distributions pattern of ssta over the east pacific region and west wind drift region not only occurs in the summer of severe drought and flood years of north china, but also in the preceding spring
（ 3 ）赤道東太平洋和西風漂流區相反的海溫距平場配置不僅出現在華北夏季嚴重旱澇年同期，在前期春季也表現得十分清晰。 -
Various statistical research reveals that there is significant correlation between north hemisphere circulation and ssta in west wind drift region, as well as in tropical eastern pacific, which are the two key regions in pacific
中緯度西風漂流區以及熱帶中東太平洋ssta與北半球大氣環流存在顯著的相關，是太平洋最主要的兩個關鍵區。 -
The circulation of positive pna index pattern is prominent in the case of persistent forcing of negative ssta in west wind drift region or positive ssta in tropical eastern pacific, which is the typical ssta pattern during el nino peak - mature phase
西風漂流區持續負ssta時或者熱帶中東太平洋持續正ssta時，阿留申低壓均有所加強，正pna指數型的大氣環流特徵顯著。而當相反符號的ssta持續作用時，大氣中阿留申低壓減弱，對應pna指數為負。 -
Further, correlation analysis is used to the summer rainfall and four seasonal north pacific ssta, the results suggest north pacific ssta which notability cause the summer rainfall anomaly over eastern china are prophase winter ssta of kuroshio region of northwestern pacific, prophase spring ssta of middle and eastern equatorial pacific and summer ssta of west wind drift region
進一步對上述東部夏季降水異常區夏季降水與春夏秋冬太平洋海溫異常作相關分析，表明對中國東部夏季降水有顯著影響是：西北太平洋黑潮海區前期冬季海溫異常、赤道中東太平洋前期春季海溫異常、中高緯太平洋西風漂流區同期夏季海溫異常。 -
Data used in this work are north pacific ssta, 160 stations precipitation of china, and ncep reanalysis data. main results are as follow : ( 1 ) it is found that a apparent transition of north pacific ssta in later 1970 ' s : eastern and middle - equatorial pacific ssta turns from cold to warm with area extending, and mid - latitude pacific ( west wind drift zone ) turns from warm to cold. during this transition of ssta, different characters also appear in el nino and la nina : before 1976, la nina happens more frequently, and its duration is longer, el nino zone develops from negative ssta in the early stage ; after 1976, el nino happens a little bit frequent and longer with more intensity than before, el nino zone develops from positive ssta in the early stage ; the course of ssta variation has an enso cycle of 2 - 6 years, annual oscillation of 8 - 9 years, and decadal variation of about 22 years
本文採用1950 - 1999年北太平洋海表溫度（ sst ） 、中國160站夏季降水和ncep再分析的歐亞500hpa高度場等資料，利用eof 、 svd 、小波分析、合成分析和相關分析等方法，在分析北太平洋海溫時空分佈特徵的基礎上，著重探討了海溫異常及其年代際變化對我國東部降水的影響，並對降水、高度場和海溫三者之間的關系進行了分析，以試圖尋找三者異常之間可能的聯系，主要結論如下： （ 1 ） 1976年前後，北太平洋海溫經歷了一次明顯的轉變，赤道中、東太平洋厄爾尼諾海區由冷轉暖，暖水范圍增大，中緯度西風漂流區海溫由暖轉冷；在這樣的年代際背景下，厄爾尼諾、拉尼娜事件在不同的時期也有不同的特徵：在76年前，拉尼娜事件發生頻率高，持續時間長，事件起始於負海溫距平；而76年後，則是厄爾尼諾事件發生頻率略高，持續時間長，強度增大，事件起始於正海溫距平。 -
The sst anomaly of the equatorial eastern pacific and west wind drift region both have influence on the general circulation and summer rainfall in north china, and the influence is nonlinear, which is not only manifested through the intensity change of anomaly of general circulation and summer rainfall in north china, but also through the spatial distribution pattern of the anomaly
赤道東太平洋、西風漂流區海溫的異常都會對大氣環流和華北夏季降水產生影響，這種影響是非線性的，這種非線性關系不僅僅體現在大氣環流和華北夏季降水異常的強度變化上，也體現在異常的空間分佈形態上。 -
( 5 ) the spring greenland sea - ice extent is larger ( smaller ) : then during the following summer the high of the japanese sea is stronger ( weaker ), and the low of the asian land is stronger ( weaker ), which make the pattern of low west and high east easily ( uneasily ) form ; the ascending movement over north china is strengthened ( weakened ) ; the summer monsoon of east asia is stronger ( weaker ), then the southeastern, warm and damp airflow towards the north china is stronger ( weaker ), and the cold airflow of the high level over the north china is also stronger ( weaker ), which make the convergence of the cold and warm air over north china easily ( uneasily ) form ; the sst of the east pacific ocean is lower ( higher ), while the sst of west wind drift is higher ( lower )
（ 5 ）春季格陵蘭海冰面積偏大（小） ：後期夏季日本海高壓偏強（弱） ，而大陸上低壓也偏強（弱） ，易（不易）形成西低東阻的形勢；華北地區的上升運動增強（減弱） ；東亞夏季風偏強（弱） ，向華北地區輸送的西南暖濕氣流偏強（弱） ，而對應高空華北地區上空冷空氣活動偏強（弱） ，利於（不利於）華北上空冷暖空氣的交匯；夏季赤道東太平洋海溫偏低（高） ，西風漂流區海溫偏高（低） 。在以上的環流背景下，華北夏季降水偏多（少） ，易澇（旱） 。 -
On base of results above, composite model of ssta in pacific and circulation anomaly are constructed for analysis their evolution. during mature phase of el nino usually in winter, positive ssta dominates in tropical eastern ocean and negative ssta dominates in west wind drift district in mid - latitude ocean, correspondingly the pna index of 500 hpa geopotential height is positive which means the aleutian low gets strong, and the situation is somewhat inversely during la nina phase of ssta
合成位相反映了太平洋ssta演變特徵，以及相對應的大氣環流異常特徵：當西風漂流區處于暖態而熱帶中東太平洋海溫偏低時，合成大氣模型當中阿留申低壓減弱， 500hpapna指數為負異常；當西風漂流區處于冷態，熱帶中東太平洋處于暖態（ elnino峰值?成熟期ssta典型分佈） ，合成大氣模型中阿留申低壓加強， 500hpapna指數為正異常。 -
These make west - pacific subtropical height strengthen and extend westward and blocking form and develop in mid - high latitude, while its above west wind drift zone decreases. and around 1976, 500hpa anomaly field of winter and summer also changes
其中變化比較顯著的是貝加爾湖附近和副高，都是76年後增強，這有利於低緯副高的加強西伸和中高緯阻塞的形成和發展；並且在76年前後，厄爾尼諾和拉尼娜年冬、夏季500hpa距平場也有一定的差異。 -
Planetary west wind drift
行星午漂流
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