Collaborative Research - Stratification on the Bering Shelf and its consequences for nutrients and the ecosystem: The effects of ice and costal water advection

合作研究 - 白令陆架分层及其对营养物和生态系统的影响：冰和沿海水平流的影响

• 批准号: 0732771
• 负责人: Thomas Weingartner
• 金额: $ 86.49万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2012-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0732771&HistoricalAwards=false
• 关键词: Collaborative; Research; Stratification; Bering; Shelf

Weingartner 0732771University of Alaska FairbanksFunds are provided to study the impact of physical variability on the processes and structure of the Bering shelf ecosystem, with special emphasis on how freshwater redistributed by the shelf circulation or introduced from sea ice melt modifies stratification and nutrient distributions. The principal investigators inquire how changes in sea ice affect advection and mixing; how variable fluxes of low-salinity, nutrient-deficient coastal waters may affect production; how cross-shelf fluxes are established and altered; how these fluxes might respond to climate change; how the seasonal stratification cycle is controlled; and how the buoyant coastal flow evolves.The 2008-2010 field effort will focus on the central Bering Sea shelf and will employ both hydrography, including extensive d18O sampling, and a nine-mooring array that spans most of the central shelf. The moorings variously will carry ADCPs, T/C recorders, fluorometers, and temperature chains. The measurements will be augmented by hydrographic and d18O sampling and drifter studies under other support. Analysis will also incorporate wind forcing, coastal discharges, surface buoyancy fluxes, and ice thickness and drift into the synthesized data set and its interpretation.These data, in conjunction with another mooring program funded elsewhere, will provide much of the background circulation and stratification information necessary to place the biological data from BEST in context.

Weingartner 0732771阿拉斯加大学费尔班克斯基金提供的过程和结构的白令大陆架生态系统的物理变化的影响进行研究，特别强调淡水重新分配的大陆架循环或从海冰融化引入修改分层和营养分布。主要调查人员询问海冰的变化如何影响平流和混合;低盐度、营养缺乏的沿海沃茨的可变通量如何影响生产;跨大陆架通量如何建立和改变;这些通量如何对气候变化作出反应;季节性分层循环如何控制; 2008-2010年的实地工作将侧重于白令海中部大陆架，并将采用水文学方法，包括广泛的d18 O采样，以及跨越大部分中央大陆架的九个系泊阵列。系泊设备将携带ADCP、T/C记录仪、荧光计和温度链。在其他支助下，水文和d18 O取样以及漂流物研究将加强测量。分析还将把风强迫、沿海排放、表面浮力通量、冰厚度和漂移纳入综合数据集及其解释中。这些数据，连同其他地方资助的另一个系泊计划，将提供大部分背景环流和分层信息，这些信息是将BEST的生物数据置于背景中所必需的。