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The Weddell Upper Ocean: Analysis, Synthesis, and Modeling of ISPOL and MaudNESS Results

威德尔上层海洋：ISPOL 和 MaudNESS 结果的分析、综合和建模

基本信息

批准号：
0739371
负责人：
Miles McPhee
金额：
$ 13.33万
依托单位：
McPhee Research Company
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2008
资助国家：
美国
起止时间：
2008-06-15 至 2011-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0739371&HistoricalAwards=false
关键词：
Weddell Upper Ocean Analysis Synthesis

项目摘要

In the Weddell Sea, the balance between sea ice production and the upward mixing of oceanic heat (along with other chemical constituents such as CO2 and nutrients) appears to be delicately poised. Better descriptions of these microturbulence characteristics and controls on the mixing of heat and salt in atmosphere-sea ice-ocean systems are sought to increase our understanding of how this balance is maintained, or may change in a warming climate. Extensive field data sets have been obtained from two recent research campaigns in the Weddell Sea sector of the Southern Ocean. The first of these, Ice Station Polarstern (ISPOL), organized by German researchers (AWI - Bremerhaven) investigated biological air-sea-ice interactions in a 50 day drift station in multiyear ice floes, east of the Antarctic Peninsula. The MaudNESS (Maud Rise Nonlinear Equation of State Study) project sought to better understand convective modes associated with the presence and absence of polyna in the Weddell Sea by investigating late-winter upper ocean mixing in regions of weak density stratification in the vicinity of the Maud Rise seamount. Further analysis of the physics of microstructure turbulence as determined from instrumented measurements of covariance-based heat and salt fluxes in Weddell Sea upper ocean sea ice zones are to be completed in this work.

在威德尔海，海冰的产生和海洋热量的向上混合(以及其他化学成分，如二氧化碳和营养物质)之间的平衡似乎微妙地保持着平衡。更好地描述这些微湍流特征和对大气-海冰-海洋系统中热和盐混合的控制，旨在增加我们对这种平衡是如何维持的，或者在气候变暖时可能发生变化的理解。从最近在南大洋韦德尔海区段开展的两次研究活动中获得了大量的实地数据集。其中第一个是由德国研究人员组织的极地冰站(ISPOL)，调查了南极半岛以东多年浮冰中一个50天漂流站的生物气-海-冰相互作用。Maud Rise非线性状态方程研究项目试图通过调查Maud Rise海山附近密度层结较弱区域的晚冬上层海洋混合，更好地了解与韦德尔海存在和不存在Polyna有关的对流模式。这项工作将完成对威德尔海上层海洋冰区基于协方差的热通量和盐通量的仪器测量所确定的微结构湍流物理的进一步分析。