mid-latitude zone 中文意思是什麼
mid-latitude zone
解釋
中緯度地帶-
China lies east to pacific ocean and includes tropical zone, subtropical zone and mid - latitude zone. continent coastal dimate is variable
我國瀕臨太平洋，跨越熱帶、亞熱帶和溫帶三個氣候帶，大陸沿海及近海區域天氣和海洋現象復雜多變。 -
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。 -
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。
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