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

基金用于研究物理变率对白令海峡陆架生态系统过程和结构的影响，特别强调陆架环流重新分配的淡水或海冰融化引入的淡水如何改变分层和营养分布。主要研究人员询问海冰的变化如何影响平流和混合；低盐度、缺乏营养的沿海水域的变化通量如何影响生产；大陆架间通量是如何建立和改变的；这些通量如何对气候变化作出反应；如何控制季节分层周期；以及沿海浮力流是如何演变的。2008-2010年的实地工作将集中在白令海中部大陆架，并将采用包括广泛的d18O采样在内的水文测量和横跨大部分中部大陆架的九个系泊阵列。系泊将不同地携带adcp，温湿度记录仪，荧光计和温度链。在其他支助下，水文测量和d18O取样以及漂流研究将扩大这些测量。分析还将把风强迫、沿海排放、表面浮力通量、冰厚和漂移纳入综合数据集及其解释。这些数据与其他地方资助的另一个系泊项目一起，将提供许多必要的背景循环和分层信息，以将BEST的生物数据置于背景中。

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.