Variability of circulation and hydrodynamic connectivity over the eastern Canadian shelf

加拿大东部陆架环流和水动力连通性的变化

• 批准号: 217081-2007
• 负责人: Sheng, Jinyu
• 金额: $ 1.54万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=477889
• 关键词: Variability; circulation; hydrodynamic; connectivity; over

Physical and biological conditions in the eastern Canadian shelf have undertaken significant changes in the last 50 years. Better knowledge of circulation, hydrography, and associated variability will be very useful for an effective and sustainable management of marine resources in Atlantic Canada. Circulation and hydrography in the region are affected strongly by wind, tides, surface heat and freshwater fluxes, and the interaction of two large-scale current systems: the Labrador Current and the Gulf Stream. Significant progress has been made in the last three decades in determining the general mean circulation from various oceanographic observations and numerical model results in the region. Less progress was made, however, in quantifying the seasonal and inter-annual variability of circulation and hydrodynamic connectivity in the region. The long-term objectives of this proposal are to examine the seasonal and inter-annual variability of circulation and assess the effects of physical processes on the marine ecosystem dynamics on the eastern Canadian shelf. The short-term objectives of the proposal are (1) to study the variability in the last 50 years using three-dimensional ocean circulation models, (2) to calculate the retention/dispersion and hydrodynamic connectivity; and (3) to develop a coupled bio-physical numerical model for the study region.

在过去50年中，加拿大东部大陆架的自然和生物条件发生了重大变化。更好地了解环流、水文和相关的变化，对于有效和可持续地管理加拿大大西洋地区的海洋资源将非常有用。该地区的环流和水文受风、潮汐、地表热量和淡水通量以及两个大型洋流系统（拉布拉多洋流和墨西哥湾流）的相互作用的强烈影响。在过去三十年中，根据该区域的各种海洋学观测和数值模式结果，在确定一般平均环流方面取得了重大进展。然而，在量化该区域环流和水动力连通性的季节和年际变化方面进展较少。这项建议的长期目标是审查环流的季节性和年际变化，并评估物理过程对加拿大东部大陆架海洋生态系统动态的影响。该方案的短期目标是：(1)利用三维海洋环流模式研究近50年的变率；(2)计算保留/分散和水动力连通性；(3)建立研究区生物物理耦合数值模型。