Variability of fronts, fresh water input and chlorophyll in the Indian Ocean sector of the Southern Ocean
Variability of fronts, fresh water input and chlorophyll in the Indian Ocean sector of the Southern Ocean
复制标题
南大洋印度洋区锋面、淡水输入和叶绿素的变化
DOI：
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复制
发表时间：
2015
期刊：
影响因子：
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通讯作者：
P. Sabu
中科院分区：
文献类型：
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作者：
N. Anilkumar;J. George;R. Chacko;N. Nuncio;P. Sabu
这项研究的目的是利用在南半球夏季(2010年2月和2011年)收集的水文数据，了解锋面和水团的变化，以及融化水对南大洋印度洋部分叶绿素(Chla)浓度的影响。南副热带锋(SSTF)和北亚南极锋(SAF1)在57°30‘E的位置比在47-48°E的位置偏南，这与南极绕极洋流(ACC)核心从西段向东段向南弯曲(c.2°)是一致的，这可能是由海底地形引起的。由于ACC岩芯的曲折，研究区东西部断面的水团侵入程度也不同。与2010年相比，2011年淡水层厚度相对于冬季水的厚度有所增加。这可能是因为2010年冬季存在较多的海冰，随后海冰融化，导致研究区域南部和西部的融化水平流。现场观测和卫星数据发现，2011年北极锋(Pf1)以南的Chla浓度很高(约0.38mgm−3)，这是由融化水造成的。
The aim of this study was to understand the variability in the fronts and water masses, and the effect of melt water on the concentration of chlorophyll (Chl a) in the Indian Ocean sector of the Southern Ocean using hydrographic data collected during the austral summer (February 2010 and 2011). The Southern Subtropical Front (SSTF) and Northern Sub Antarctic Front (SAF1) were found to be further south at 57°30′E than at 47–48°E. This southward shift of the fronts was consistent with the southward meandering (c. 2°) of the Antarctic Circumpolar Current (ACC) core from the western section to the eastern section, which could have been caused by the bottom topography. The intrusion of water masses also differed between the western and eastern transects of the study region as a result of the meandering of the ACC core. Fresh water layer thickness relative to the winter water in 2011 was more compared to that during 2010. This could have been due to the larger amount of sea ice that was present in the winter of 2010, which subsequently melted, resulting in the advection of melt water from the south and west of the study region. In situ observations and satellite data detected a high Chl a concentration (c. 0.38 mg m−3) south of the Northern Polar Front (PF1) in 2011, which was caused by this melt water.
德雷克海峡南极绕极流的近地表涡热和动量通量
影响因子：
3.5
作者：
Lenn Y
通讯作者：
Lenn Y
影响因子：
5.2
作者：
Couldrey, Matthew P.;Jullion, Loic;Speer, Kevin L.
通讯作者：
Speer, Kevin L.