近年来厄尔尼诺期间北赤道流输运的年际变化
发布时间：2019-06-13 17:12
【摘要】：为了研究近年来厄尔尼诺期间北赤道流输运的年际变化,本文利用海洋客观分析数据MOAA GPV(Grid Point Value of the Monthly Objective Analysis)以及P-vector方法计算了北太平洋绝对地转流,探讨了2001~2013年期间厄尔尼诺与北赤道流输运之间的关系。在此期间发生的4次厄尔尼诺事件中,北赤道流输运在2002~2003、2006~2007、2009~2010年的厄尔尼诺成熟期都出现了明显的增强,但是在2004~2005年的厄尔尼诺成熟期并没有明显的增强。进一步分析发现,在2002~2003年、2006~2007年、2009~2010年的厄尔尼诺成熟期,10°N以南的热带西北太平洋区域出现了负的海面高度异常和气旋式环流异常,这主要是由热带环流区域出现的西风异常和正的Ekman抽吸通过Rossby波西传到热带西太平洋区域所致;但是在2004~2005年厄尔尼诺成熟期,海面温度异常的分布明显不同,西风异常和正的Ekman抽吸异常明显北移,导致负的海面高度异常和气旋式环流异常出现在了10°N以北的西北太平洋区域,使得北赤道流输运在2004~2005年的厄尔尼诺成熟期没有明显的增强。
[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 掳 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.
【作者单位】： 中国科学院海洋研究所海洋环流与波动重点实验室;中国科学院大学;中国石油大学(华东)理学院;中国海洋大学海洋环境学院;
【基金】：“全球变化与海气相互作用”任务专项(GASI-03-01-01-05) 国家基础研究项目(2012CB417401;2013CB956202)~~
【分类号】：P731.27;P732
，
本文编号：2498679
[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 掳 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.
【作者单位】： 中国科学院海洋研究所海洋环流与波动重点实验室;中国科学院大学;中国石油大学(华东)理学院;中国海洋大学海洋环境学院;
【基金】：“全球变化与海气相互作用”任务专项(GASI-03-01-01-05) 国家基础研究项目(2012CB417401;2013CB956202)~~
【分类号】：P731.27;P732
，
本文编号：2498679
本文链接：https://www.wllwen.com/kejilunwen/haiyang/2498679.html
