Collaborative Research: Reconstruction of the eastern Bering ice-ocean system by variational assimilation of the BEST-BSIERP data

提供资金是为了实现三个主要目标。1. 通过建模和数据同化，综合来自BEST-BSIERP在白令海的协调项目和其他来源的数据，这些数据是在同一时期（2007-2010年）收集的。采用两个联合资料同化系统重建了东白令海冰海系统的物理海洋学场。第一个系统将用于重建白令海东部大尺度环流，并精确描述白令海东南部陆架的大尺度过程。第二个将配置为东白令海陆架，并将明确解析涡旋和潮汐动力学，从而更好地理解东白令海陆架区域与深盆之间的非线性相互作用过程。分析重建的场并确定引起观测到的变率的重要过程。3. 确定同化不同来源的数据对估算近地表体积、动量、热量和物质输运的影响。这将通过伴随灵敏度分析来完成。研究结果将有助于在未来的研究中优化白令海系泊观测。白令海是美国最大的商业渔场和自给渔场。面对持续的气候变化，这种渔业的管理需要了解影响渔业的所有过程。其中包括不断变化的水温，它会影响鱼类的生长速度，以及将鱼卵和幼虫从产卵区带到苗圃的水流场。该项目将有助于了解这些场如何响应其他外部强迫而变化。

Funds are provided to achieve three major goals. 1. To synthesize data from the BEST-BSIERP coordinated programs in the Bering Sea and data from other sources, collected during the same time period (2007-2010), via modeling and data assimilation. Two joint data assimilation systems will be applied to reconstruct the physical oceanographic fields of the eastern Bering ice-ocean system. The first system will be configured to reconstruct the large-scale circulation in the eastern Bering Sea and to accurately describe the large-scale processes in the South Eastern Bering Sea Shelf. The second will be configured for the eastern Bering Sea Shelf and will explicitly resolve eddy and tidal dynamics, thus leading to a better understanding of the nonlinear interaction processes between the deep basin and the shelf region of the eastern Bering Sea. 2. To analyze the reconstructed fields and identify processes important for causing observed variability. 3. To determine the impact of assimilating data with different origins on the estimation of near-surface transports of volume, momentum, heat, and material. This will be accomplished through adjoint sensitivity analysis. Results will help optimize Bering Sea mooring observations in future studies. The Bering Sea is the largest commercial and subsistence fishery of the United States. Management of this fishery in the face of ongoing climate variability requires an understanding of all the processes impacting the fishery. Amongst these are the changing water temperature, which influences the growth rate of fish, and the current field, which carries fish eggs and larvae from their spawning regions to their nursery grounds. This project will contribute to an understanding of how these fields change in response to other external forcing.