南极普里兹湾及其邻近海域的水文结构特征和底层水的来源
Characteristics of hydrographic structure and source of bottom water in the Prydz Bay and vicinity sea area
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摘要: 利用中国第九次南大洋考察中南极普里兹湾及其邻近海域的CTD资料,分析研究了调查海域的水文结构特征及其该区南极底层水(AABW)的来源.研究结果表明,在研究海域,深水洋区近表层流由西向东流,而在普里兹湾内存在一个气旋型涡.水文结构中最明显的海洋学特征是:(1)绕极深层水(CDW)的涌升现象明显,涌升最强的位置是麦克罗伯逊地以北海域,最明显的深度是50～200m层,暖水涌升将冬季冷水分隔成南北两部分,并在其中形成孤立的暖水块;(2)陆缘水边界明显,这是绕极深层水与南极冷水之间形成的锋面,一般处在次表层水中,大致位于64°～66°S之间;(3)存在着双跃层结构.观测期间,普里兹湾以北探水海域存在着南极底层水,其来源可能有二:一为当地形成,二为源于威德尔海和罗斯海.Abstract: Based on, the data of CTD in the Prydz Bay and the vicinity sea area by CHINARE-9, hydrographic structure and the source of Antarctic Bottom Water (AABW) is analysed in the paper.Results show that,near-surface current flows from west to east in the deep waters,there is a cyclonic eddy in the Prydz Bay.The main characteristics of oceanography hydrographic structure are that:(1) the upwelling phenomenon of Circumpolar Deep Water (CDW).The strongest location of upwelling is sea area north of Mcrobsion Land.The most obvious depth is in 50~200 m.The cold water in winter is divided in two parts by the CDW of upwelling.An isolated warm water is formed among them.(2)Boundary of continental margin water is obvious.This is the front between CDW and Antarctic cold water of subsurface,it is in 64°~66°S.(3) There is double thermocline structure.(4) During observation there is AABW north of the Prydz Bay.The source of AABW may have two: (1) it is formed in the locality, (2) it comes from the Ross Sea.
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Key words:
- The Prydz Bay /
- characteristics of hydrographic structure /
- AABW
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Zverev A A.Currents in the Indian Sector of the Antarctic.Trudy Sovetskoi Antarcticheskoi,Ekspdititsii.1963,17.144~155 Grigor'yev Y A.Circulation of the surface waters in Prydz Bay.Soviet Antarctic Expedition,1967,7,74~76 Smith N R et al.Water masses and circulation in the region of Prydz Bay,Antarctic.Deep-Sea Res.,1984,31(9):1 121~1 147 Liang Xiangsan et al.A condition for the formation of Antarctic bottom water in Prydz Bay,Antarctica.Antarctic Research,1994,5(1);62~74 Cordon A I.Antarctic polar front zone.In:Antarctic Oceanology I.Antarctic Kesearch Series(J I.Reid ed.),American Geophysical Union,1971,205~221 Cordon A L.Oceanography of Antarctic water.In:Antarctic Oceanology I.Antarctic Research Series CJ L Reid ed.),American Geophysical Union,1971,169~204 HU斯费德鲁普等著,毛汉礼译.海洋,第二卷,北京:科学出版社,1958,543 Kolla V et al.Spreading of Antarctic bottom water and its effect on the floor of the Indian Ocean inferre from bottom-water yotential temperature,turbidity,and sea-floor photography.Marine Geology,1976,21,139-171 Jacobs S S,Ueorgi D T.Observations on the Southwest Indian Antarctic Ocean.In:A Voyage of Discovery(M Angel ed.),Pergamon Press,Oxford,1977,43~84 Carmack E C.Water characteristics of the Southern Ocean south of the Polar Foranl.Deep-Sea Research,1977,24,Supplement,15~41 Gordon A L.Recent physical oceanography studies of Antarctic waters.In:Research in the Antarctic,L.OUAM(D C Washington ed.),American Association for the Advancement of Science,1971,609~629 Uordon A I.Oceanography of Antarctic Water.In:Antarctic Oceanography I:Antarctic Research Series(J I.Reid ed.),American Geophysical Union,1975,15,169~203 -
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