US-GLOBEC: NWA Georges Bank: :Impacts of Climate and Basin-Scale Variability on Seeding and Production of Calanus finmarchicus in the Gulf of Maine/Georges Bank Region

US-GLOBEC：NWA 乔治滩：：气候和流域尺度变异对缅因湾/乔治滩地区 Calanus finmarchicus 播种和生产的影响

• 批准号: 0535379
• 负责人: Avijit Gangopadhyay
• 金额: $ 21.31万
• 依托单位: University of Massachusetts, Dartmouth
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0535379&HistoricalAwards=false
• 关键词: US; GLOBEC; NWA; Georges; Bank

The processes linking the ecosystems of Georges Bank, Scotian Shelf, Slope Sea and Gulf of Main to climate variability-induced, basin-scale circulation changes caused by large-scale atmospheric effects such as the North Atlantic Oscillation (NAO) appear to occur over both multi-decadal and interannual time scales. This project aims to elucidate how these multi-year changes in circulation within the western North Atlantic basin affect C. finmarchicus, specifically its transport onto Georges Bank. This will be accomplished via a combination of numerical model simulations and observational data.Primary tasks include: (1) Setting up and running an individual based model (IBM) for the Northwest Atlantic, using physical fields corresponding to the high-NAO (1980-1993) and low-NAO (1962-1971) periods obtained from an ongoing eddy-resolving North Atlantic simulation to understand multidecadal variability of Calanus finmarchicus seeding and production in this region; (2) Performing eddy-resolving basin-scale model simulations during 1988-1999 starting from already existing high-NAO simulations (from an ongoing NASA project) and run the IBM to study the interannual variability of C. finmarchicus seeding and production in this region; (3) Analyzing long-term in-situ physical and biological datasets and satellite-derived sea surface temperature (SST) along with in-situ physical, biological, and chemical data collected during the GLOBEC core-measurement period (1995-1999) to validate the basin-scale physical and biological fields and develop a broader understanding of C. finmarchicus seeding and production; (4) Generating four-dimensional high-resolution (5-km) physical fields using basin-scale fields and available data during 1993-1999, and running a series of IBM simulations at higher resolution in order to address questions relating ecosystem variability in the study regions to the large-scale fluctuations of the NAO.Within the GLOBEC synthesis effort, this study will enhance the scientific understanding of large-scale climatic and basin-scale forcing on the regional ecosystem of the NWA/GB region. Two graduate students will be trained. Results will be disseminated in scientific publications and presentations at national conferences while model output and several value-added fields will be made available via a website linked to the GLOBEC Georges Bank website.

将乔治浅滩、斯科舍大陆架、坡海和美因湾的生态系统与北大西洋涛动（NAO）等大规模大气效应引起的气候变率引起的盆地规模环流变化联系起来的过程似乎发生在这两个地区多年代际和年际时间尺度。该项目旨在阐明北大西洋西部盆地内环流的多年变化如何影响 C. finmarchicus，特别是其向乔治浅滩的运输。这将通过数值模型模拟和观测数据的结合来完成。主要任务包括：（1）使用与高 NAO（1980- 1993）和低NAO（1962-1971）时期是从正在进行的北大西洋涡流解析模拟中获得的，以了解该地区Calanus finmarchicus播种和生产的数十年变化 地区; (2) 在 1988-1999 年期间，从现有的高 NAO 模拟（来自正在进行的 NASA 项目）开始进行涡流解析盆地规模模型模拟，并运行 IBM 来研究该地区 C. finmarchicus 播种和生产的年际变化; (3) 分析长期原位物理和生物数据集、卫星海面温度（SST）以及 GLOBEC 核心测量期间（1995-1999 年）收集的原位物理、生物和化学数据，以验证流域规模的物理和生物场，并加深对 C. finmarchicus 播种和生产的了解； (4) 利用 1993-1999 年期间的流域尺度场和现有数据生成四维高分辨率（5 公里）物理场，并以更高分辨率运行一系列 IBM 模拟，以解决与生态系统变异性相关的问题在 GLOBEC 综合工作中，这项研究将增强对 NWA/GB 地区区域生态系统的大规模气候和盆地尺度强迫的科学认识。将培养两名研究生。结果将在科学出版物和国家会议上的演示中传播，同时模型输出和几个增值领域将通过与 GLOBEC 乔治银行网站链接的网站提供。