Upper ocean variability in west Antarctic Peninsula continental shelf waters as measured using instrumented seals
Upper ocean variability in west Antarctic Peninsula continental shelf waters as measured using instrumented seals
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DOI：
10.1016/j.dsr2.2007.11.003
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发表时间：
2008-01-01
影响因子：
3
通讯作者：
Burns, Jennifer M.
中科院分区：
文献类型：
--
作者：
Costa, Daniel P.;Klinck, John M.;Burns, Jennifer M.
来自自由活动的带仪器的海豹（食蟹海豹Lobodon carcinophagus和豹海豹Hydrurga leptonyx）所收集的南极半岛西部（WAP）大陆架水域的温度剖面数据，被用于证明这些平台可用于补充传统的海洋学采样方法，以研究上层水体的物理特性。来自海豹的剖面数据与从船载温盐深仪（CTD）测量以及为南极半岛西部开发的数值环流模型所获得的温度剖面相结合，用于描述南极半岛西部大陆架上层海洋水域的温度结构、热含量和热通量的变化。来自海豹的数据记录了南极半岛西部大陆架表层水从秋季到冬季的转变，以及在150 - 200米以下整个大陆架存在变性的绕极深层水（CDW）。根据来自海豹的温度剖面计算出的上层200米的热含量在1000到1500兆焦耳每平方米之间；从模拟的温度分布也得到了类似的估计值。来自海豹的温度测量提供了比目前任何其他可用的海洋学采样方法更广泛的空间和时间分辨率。因此，来自海豹的测量为评估从数值环流模型获得的温度场提供了一个有价值的数据集。（C）2008爱思唯尔有限公司。保留所有权利。
Temperature profile data for the west Antarctic Peninsula (WAP) continental shelf waters, collected from freely ranging instrumented seals (crabeater, Lobodon carcinophagus and leopard, Hydrurga leptonyx), were used to demonstrate that these platforms can be used to Supplement traditional oceanographic sampling methods to investigate the physical properties of the upper water column. The seal-derived profiles were combined with temperature profiles obtained from ship-based CTD measurements and from a numerical circulation model developed for the WAP to describe changes in temperature structure, heat content, and heat flux in the upper ocean waters of the WAP continental shelf. The seal-derived data documented the fall-to-winter transition of the surface waters and the shelf-wide presence of modified Circumpolar Deep Water (CDW) below 150-200 m on the WAP continental shelf. The heat content of the upper 200 m calculated from the seal-derived temperature profiles ranged between 1000 and 1500 MJ m(-2); similar estimates were obtained from simulated temperature distributions. The seal-derived temperature measurements provided broader space and time resolution than was possible using any other currently available oceanographic sampling method. As such, the seal-derived measurements provided a Valuable dataset for evaluation of temperature fields obtained from a numerical circulation model. (C) 2008 Elsevier Ltd. All rights reserved.