呂宋海峽黑潮脫落渦旋的特征分析
發(fā)布時間:2018-08-03 10:13
【摘要】:渦旋脫落在西太平洋和南海的海水屬性交換中起到重要作用。為研究呂宋海峽附近海域由黑潮脫落并進(jìn)入南海的渦旋特征,本文采用1993—2014年法國空間局(AVISO)多衛(wèi)星融合海面高度距平(SLA)和絕對動力地形(ADT)全球網(wǎng)格化延時數(shù)據(jù),美國國家海洋數(shù)據(jù)中心(NODC)的WOA13年平均溫鹽剖面氣候數(shù)據(jù),以及1993—2010年SODA2.2.4月平均海洋同化數(shù)據(jù)集,并分析了黑潮脫落渦旋與大尺度環(huán)流的關(guān)系。結(jié)果表明:(1)暖渦脫落數(shù)量遠(yuǎn)多于冷渦數(shù)量,且脫落的冷渦絕大部分在黑潮西側(cè)邊緣生成,而脫落的暖渦則大部分在黑潮控制區(qū)生成。(2)冷渦、暖渦脫落時的平均半徑、平均振幅相近,但是冷渦的平均生命、平均遷移距離約為暖渦的一半。(3)冷渦不是每年都有脫落,主要在冬季脫落;暖渦則每年均有脫落,主要發(fā)生在秋季。(4)脫落渦旋數(shù)量與脫落時的黑潮路徑類型相關(guān)。(5)脫落渦旋的平均西行速度為5.8cm/s,與斜壓第一模態(tài)長Rossby波波速及大尺度環(huán)流的西向平流流速之和相近。
[Abstract]:Vortex shedding plays an important role in ocean attribute exchange between the western Pacific and the South China Sea. In order to study the vortex characteristics of the sea area near the Luzon Strait from the Kuroshio to the South China Sea, the French Space Agency (AVISO) multisatellite fusion of the sea surface height anomaly (SLA) and the absolute dynamic terrain (ADT) global gridding delay data from 1993 to 2014 is used in this paper. The climate data of WOA13 annual mean temperature and salt profile of (NODC) and the monthly assimilation data set of SODA2.2.4 from 1993 to 2010 are analyzed. The relationship between the Kuroshio vortex and the large scale circulation is analyzed. The results show that: (1) the number of warm vortex shedding is much more than that of cold vortex, and most of the shedding cold vortex is formed on the western edge of the Kuroshio, while the shedding warm vortex is mostly formed in the Kuroshio control area. (2) the mean radius of the warm vortex shedding, The mean amplitude is similar, but the mean life of the cold vortex is about half of that of the warm vortex. (3) the cold vortex does not fall off every year, mainly in winter, and the warm vortex falls off every year. (4) the number of shedding vortices is related to the type of Kuroshio path. (5) the average westward velocity of the shedding vortex is 5.8 cm / s, which is close to the sum of the baroclinic first mode long Rossby wave velocity and the westward advection velocity of the large scale circulation.
【作者單位】: 國家海洋局第一海洋研究所海洋環(huán)境科學(xué)和數(shù)值模擬重點(diǎn)實(shí)驗(yàn)室;青島海洋科學(xué)與技術(shù)國家實(shí)驗(yàn)室區(qū)域海洋動力學(xué)與數(shù)值模擬功能實(shí)驗(yàn)室;河海大學(xué)海洋學(xué)院;
【基金】:國家自然科學(xué)基金委員會-山東省人民政府聯(lián)合資助海洋科學(xué)研究中心項(xiàng)目,U1606405號 國家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)項(xiàng)目,2013AA09A506號 中國科學(xué)院戰(zhàn)略性先導(dǎo)科技專項(xiàng),XDA11010304號,XDA11010301號
【分類號】:P731.2
本文編號:2161424
[Abstract]:Vortex shedding plays an important role in ocean attribute exchange between the western Pacific and the South China Sea. In order to study the vortex characteristics of the sea area near the Luzon Strait from the Kuroshio to the South China Sea, the French Space Agency (AVISO) multisatellite fusion of the sea surface height anomaly (SLA) and the absolute dynamic terrain (ADT) global gridding delay data from 1993 to 2014 is used in this paper. The climate data of WOA13 annual mean temperature and salt profile of (NODC) and the monthly assimilation data set of SODA2.2.4 from 1993 to 2010 are analyzed. The relationship between the Kuroshio vortex and the large scale circulation is analyzed. The results show that: (1) the number of warm vortex shedding is much more than that of cold vortex, and most of the shedding cold vortex is formed on the western edge of the Kuroshio, while the shedding warm vortex is mostly formed in the Kuroshio control area. (2) the mean radius of the warm vortex shedding, The mean amplitude is similar, but the mean life of the cold vortex is about half of that of the warm vortex. (3) the cold vortex does not fall off every year, mainly in winter, and the warm vortex falls off every year. (4) the number of shedding vortices is related to the type of Kuroshio path. (5) the average westward velocity of the shedding vortex is 5.8 cm / s, which is close to the sum of the baroclinic first mode long Rossby wave velocity and the westward advection velocity of the large scale circulation.
【作者單位】: 國家海洋局第一海洋研究所海洋環(huán)境科學(xué)和數(shù)值模擬重點(diǎn)實(shí)驗(yàn)室;青島海洋科學(xué)與技術(shù)國家實(shí)驗(yàn)室區(qū)域海洋動力學(xué)與數(shù)值模擬功能實(shí)驗(yàn)室;河海大學(xué)海洋學(xué)院;
【基金】:國家自然科學(xué)基金委員會-山東省人民政府聯(lián)合資助海洋科學(xué)研究中心項(xiàng)目,U1606405號 國家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)項(xiàng)目,2013AA09A506號 中國科學(xué)院戰(zhàn)略性先導(dǎo)科技專項(xiàng),XDA11010304號,XDA11010301號
【分類號】:P731.2
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