【摘要】：為了研究近年來厄爾尼諾期間北赤道流輸運(yùn)的年際變化,本文利用海洋客觀分析數(shù)據(jù)MOAA GPV(Grid Point Value of the Monthly Objective Analysis)以及P-vector方法計(jì)算了北太平洋絕對地轉(zhuǎn)流,探討了2001~2013年期間厄爾尼諾與北赤道流輸運(yùn)之間的關(guān)系。在此期間發(fā)生的4次厄爾尼諾事件中,北赤道流輸運(yùn)在2002~2003、2006~2007、2009~2010年的厄爾尼諾成熟期都出現(xiàn)了明顯的增強(qiáng),但是在2004~2005年的厄爾尼諾成熟期并沒有明顯的增強(qiáng)。進(jìn)一步分析發(fā)現(xiàn),在2002~2003年、2006~2007年、2009~2010年的厄爾尼諾成熟期,10°N以南的熱帶西北太平洋區(qū)域出現(xiàn)了負(fù)的海面高度異常和氣旋式環(huán)流異常,這主要是由熱帶環(huán)流區(qū)域出現(xiàn)的西風(fēng)異常和正的Ekman抽吸通過Rossby波西傳到熱帶西太平洋區(qū)域所致;但是在2004~2005年厄爾尼諾成熟期,海面溫度異常的分布明顯不同,西風(fēng)異常和正的Ekman抽吸異常明顯北移,導(dǎo)致負(fù)的海面高度異常和氣旋式環(huán)流異常出現(xiàn)在了10°N以北的西北太平洋區(qū)域,使得北赤道流輸運(yùn)在2004~2005年的厄爾尼諾成熟期沒有明顯的增強(qiáng)。
[Abstract]:In order to study the interannual variation of the transport of North Equatorial currents during the El Nio period in recent years, the relationship between the El Nino and the north equatorial flow transport during the period from 2001 to 2013 is studied by using the MoAA GPV (Grid Point Value of the Monthly Objective Analysis) and the P-vector method. In the four El Nino events in this period, the north equatorial flow transport has been significantly enhanced in the period from 2002 to 2003,2006 to 2007 and 2009 to 2010, but the El Nino period in 2004 to 2005 was not significantly enhanced. Further analysis found that during the period from 2002 to 2003, from 2006 to 2007, from 2009 to 2010, during the El Nino period of 2009 to 2010, there was a negative sea level anomaly and a cyclone-type circulation anomaly in the tropical Northwest Pacific region of the south of 10 擄 N. The abnormal and positive Ekman suction of the westerly wind and the positive Ekman in the circulation area of the tropical circulation is caused by the Western Pacific region. However, during the period from 2004 to 2005, the abnormal distribution of the sea surface temperature is obviously different, and the abnormal and positive Ekman suction of the west wind is obviously in the north. Resulting in a negative sea level anomaly and a cyclonic circulation anomaly occurring in the north-west Pacific region north of 10 & deg; N, so that the north equatorial flow transport is not significantly enhanced during the El Nino period from 2004 to 2005.
【作者單位】： 中國科學(xué)院海洋研究所海洋環(huán)流與波動重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院大學(xué);中國石油大學(xué)(華東)理學(xué)院;中國海洋大學(xué)海洋環(huán)境學(xué)院;
【基金】：“全球變化與海氣相互作用”任務(wù)專項(xiàng)(GASI-03-01-01-05) 國家基礎(chǔ)研究項(xiàng)目(2012CB417401;2013CB956202)~~
【分類號】：P731.27;P732
，

本文編號：2498679