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首页> 外文期刊>International Journal of Geosciences >Hydrodynamics between Africa and Antarctica during Austral Summer of 2008 and 2009: Results of the IPY Project
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Hydrodynamics between Africa and Antarctica during Austral Summer of 2008 and 2009: Results of the IPY Project

机译：2008年和2009年夏季，非洲与南极洲之间的水动力：IPY项目的成果

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摘要

A hydrographic section between Cape Town,South AfricaandIndiaBay,Antarcticawas sampled by deploying expendable CTD probes during the austral summer of 2008 and 2009. In 2009, the Agulhas Retroflection (AR) Front was displaced southward by 1.5° latitude, while the northern and southern Polar Front meandered southward by 1° and 1.4° latitude, respectively, relative to their positions in 2008. Geostrophic transport, relative to1000 m, indicates that Antarctic Circumpolar Current (ACC) flow decreased by 2.5 Sv in 2009 compared to that in 2008. The anticyclones which are detached from the AR facilitates a transport to the southeast Atlantic Ocean ranging between 8 and 12 Sv. Nearly 50% of the ACC transport is confined to the 100 - 500 m layer. A comparison of water mass distribution for 2008 and 2009 suggests that Mode Water distribution was restricted to 42.5°S and 41.9°S, and the Antarctic Surface Water ex°tended to 57.6°S and 46.6°S, respectivel°. In 2009, the along track Heat Content (HC) and Salt Content (SC) for the upper750 mof the water column decreased each by 1% compared to those in 2008. In the ACC domain, the HC and SC dip by 36% and 40% in 2009, respectively. The HC and SC associated with Agulhas Retroflection Front increase in 2009 by 1% and 2%, respectively, due to an enhanced Agulhas transport of warm and saline water from the tropics by 2%.
机译：南非开普敦和南极洲印度湾之间的水文断面，在2008年和2009年的夏季，通过部署消耗性的CTD探针进行了采样。2009年，Agulhas Retroflection（AR）锋线向南移动了1.5°纬度，而北极和南极前锋相对于2008年的位置分别向南弯曲1°和1.4°。地转运动（相对于1000 m）表明，与2008年相比，2009年南极绕极流（ACC）流量降低了2.5 Sv。与AR分开的飞机便于运输到8至12 Sv之间的东南大西洋。将近50％的ACC传输被限制在100-500 m的层中。对2008年和2009年水质分布的比较表明，模式水分布分别限制在42.5°S和41.9°S，南极地表水分别扩展到57.6°S和46.6°S。 2009年，水柱上部750英尺的沿线热量含量（HC）和盐含量（SC）与2008年相比分别下降了1％。在ACC域中，HC和SC下降了36％和2009年的40％。与Agulhas Retroflection Front有关的HC和SC在2009年分别增加了1％和2％，这是由于来自热带地区的Agulhas从温暖的热水和盐水中的运输增加了2％。

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