最近21年厄加勒斯反曲的变化Changes of Agulhas Retroflection in Recent 21 Years
林霞,王召民
摘要(Abstract):
非洲南部厄加勒斯泄漏过程将印度洋的暖咸水输入大西洋,是大洋环流中联系印度洋和大西洋的关键过程,厄加勒斯反曲的位置和强度影响此泄漏过程。文章利用1993—2013年绝对海表高度数据来确定厄加勒斯环流反曲点、厄加勒斯流和回流的位置,发现厄加勒斯流和回流所在的位置年际变化较小,而厄加勒斯环流反曲点位置则年际变化显著;厄加勒斯环流反曲点位置的纬向变动范围为14°E~19°E,经向为38.5°S~40°S,东西向变化范围较大。反曲点位置与厄加勒斯流强度的相关分析表明,厄加勒斯流增强(减弱),反曲点位置偏西(东)。
关键词(KeyWords): 卫星高度计;绝对海表高度;厄加勒斯流;厄加勒斯回流;厄加勒斯反曲
基金项目(Foundation): 国家自然科学基金面上项目(41276200);; 江苏省创新创业团队计划项目资助~~
作者(Author): 林霞,王召民
DOI: 10.16441/j.cnki.hdxb.20150204
参考文献(References):
- [1]Lutjeharms J R E.The Agulhas Current[J].African Journal of Marine Science,2006,28:729-732.
- [2]Beal L M,De Ruijter W P M,Biastoch A,et al.On the role of the Agulhas system in ocean circulation and climate[J].Nature,2011,472:429-436.
- [3]Bard E,Rickaby R E.Migration of the subtropical front as a modulator of glacial climate[J].Nature,2009,460:380-383.
- [4]Peeters F J C,Acheson R,Brummer G J A,et al.Vigorous exchange between the Indian and Atlantic oceans at the end of the past five glacial periods[J].Nature,2004,430:661-665.
- [5]De Ruijter W P M,Biastoch A,Drijfhou S S,et al.Indian-Atlantic interocean exchange-Dynamics,estimation and impact[J].Journal of Geophysical Research,1999,104(C9):20885-20910.
- [6]Biastoch A,Bning C W,Lutjeharms J R E,et al.Increase in Agulhas leakage due to pole-ward shift of the Southern Hemisphere westerlies[J].Nature,2009,462:495-498.
- [7]Rouault M,Penven P,Pohl B.Warming in the Agulhas Current system since the 1980’s[J].Geophys Res Lett,2009,36:L12602.
- [8]Backeberg B C,Penven P,Rouault M.Impact of intensified Indian Ocean winds on mesoscale variability in the Agulhas system[J].Nature Clim Change,2012,2:608-612.
- [9]Dencausse G,Arhan M,Speich S.Spatio-temporal characteristics of the Agulhas Current retroflection[J].Deep-Sea Research,2010,57:1392-1405.
- [10]Van Sebille E,Biastoch A,Van L P J,et al.A weaker Agulhas Current leads to more Agulhas Leakage[J].Geophys Res Lett,2009,36:L03601.
- [11]Van Sebille E,Barron C N,Biastoch A,et al.Relating Agulhas leakage to the Agulhas Current retroflection location[J].Ocean Science,2009,5(4):511-521.
- [12]Biastoch A,Bning C W,Lutjeharms J R E.Agulhas leakage dynamics affects decadal variability in Atlantic overturning circulation[J].Nature,2008a,456:489-492.
- [13]Biastoch A,Lutjeharms J R E,Bning C W,et al.Mesoscale perturbations control inter-ocean exchange south of Africa[J].Geophys Res Lett,2008b,35:L20602.
- [14]Bars D L,Dijkstra H A,DeRuijter W P M.Impact of the indonesian through flow on Agulhas leakage[J].Ocean Sci,2013,9:773-785.
- [15]Bars D L,De Ruijter W P M,Dijkstra H A.New regime of the Agulhas Current retroflection:Turbulent choking of Indian-Atlantic leakage[J].Journal of Physical Oceanography,2012,42:1158-1172.
- [16]Bars D L,Durgadoo J V,Dijkstra H A,et al.An observed 20yr time-series of Agulhas leakage[J].Ocean Sci Discuss,2014,11:171-196.
- [17]Lutjeharms J R E,Van B R C.The retroflection of the Agulhas Current[J].Journal of Physical Oceanography,1988a,18:1570-1583.
文章评论(Comment):
|
||||||||||||||||||
|
||||||||||||||||||