本文關(guān)鍵詞：黑潮末端與黑潮延伸體的流場異常模態(tài)分析　出處：《海洋科學(xué)進展》2016年01期 　論文類型：期刊論文

  更多相關(guān)文章： 流場異常 黑潮末端 黑潮延伸體 復(fù)EOF分析

【摘要】：對北太平洋黑潮末端及黑潮延伸體的流場異常采用復(fù)EOF分析,結(jié)果發(fā)現(xiàn):該海域流場明顯異常在全年四季都主要發(fā)生在黑潮末端和黑潮延伸體上,其異常的主要形式在前2個模態(tài)均表現(xiàn)為一條由中尺度渦旋組成的渦旋帶,帶上通常有兩兩旋轉(zhuǎn)方向相反的渦旋偶。各季第一模態(tài)方差貢獻表現(xiàn)的季節(jié)變化特征與日本以南的黑潮流量相一致,秋季最大,夏季次之。ENSO的機制是副熱帶太平洋經(jīng)圈環(huán)流與熱帶太平洋緯向環(huán)流系統(tǒng)之間的相互作用,其在各季第一模態(tài)的年際變化上均有所反映。冬季PDO在年代際變化上表現(xiàn)明顯,其他三季則NPGO表現(xiàn)明顯。該海域流場異常的性質(zhì)是海洋Rossby波的異常,而赤道太平洋流場異常的性質(zhì)是赤道俘獲波的異常,但兩者均與風(fēng)應(yīng)力異常強迫有關(guān)。
[Abstract]:At the end of the North Pacific Kuroshio and the Kuroshio extension flow anomaly using complex EOF analysis, the results show that the waters flow significantly abnormal in four seasons have occurred mainly in the Kuroshio and the Kuroshio extension end, the main form of the anomalies in the first 2 modes showed a vortex composed of mesoscale vortex zone. Usually there are 22 pairs of vortices with opposite rotating direction. The seasonal variation of each season the first mode performance variance contribution with Japan at the south of the Kuroshio transport is consistent, the biggest fall in summer, the mechanism of.ENSO is subtropical Pacific meridional circulation and zonal circulation in the tropical Pacific Ocean Interaction between systems, in its annual the first mode of the season changes are reflected in the winter. The PDO decadal variation is obvious, the other three quarter NPGO performance significantly. The nature of the sea flow anomaly is the different oceanic Rossby wave Often, the anomalous flow field in the equatorial Pacific is the anomaly of the equatorial capture wave, but both are related to the abnormal forcing of the wind stress.

【作者單位】： 中國人民解放軍61741部隊;解放軍理工大學(xué)氣象海洋學(xué)院大氣環(huán)流與短期氣候預(yù)測實驗室;北京市計量檢測科學(xué)研究院;
【基金】：國家重點基礎(chǔ)研究發(fā)展計劃項目——西北太平洋海洋多尺度變化過程、機理及可預(yù)報性(2013CB956203)
【分類號】：P731.27
【正文快照】： 3.北京市計量檢測科學(xué)研究院,北京100029)黑潮是位于北太平洋西側(cè)的一支西邊界流,具有高溫、高鹽、流幅窄、流速快、流量大等特征。日本列島以南的黑潮通常稱之為黑潮末端。黑潮延伸體是指太平洋西邊界流在140°E,35°N附近與日本海岸分離后進入北太平洋的水體,其呈現(xiàn)2個大彎，

本文編號：1421560