U.S. GLOBEC: Georges Bank Phase II Circulation Modes on Georges Bank: Quantifying Water Sources using the O-18 Tracer

美国 GLOBEC：乔治银行第二阶段循环模式 乔治银行：使用 O-18 示踪剂量化水源

• 批准号: 9632784
• 负责人: Richard Fairbanks
• 金额: $ 23.5万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9632784&HistoricalAwards=false
• 关键词: U.S.; GLOBEC; Georges; Bank; Phase

9632784 FAIRBANKS Circulation of water over Georges Bank can be described by two modes: (1) the canonical mode, that is an anticyclonic gyre with source waters originating in the coastal Gulf of Maine; (2) the "shunt mode" that is characterized by direct injection of Scotian Shelf Water across the Northeast Channel onto the south flank of Georges Bank. The primary objective of this study is to assess the amount of biological variance explained by these two circulation modes. The project will use the oxygen isotope tracer oxygen-18 of the water to separate local and upstream freshwater sources and to quantitatively estimate the percent contribution of each to Georges Bank water. This project is a part of the U.S. GLOBEC Northwest Atlantic Field Studies, Phase 2 program. ***

9632784费尔班克斯乔治岸上空的水循环可以用两种模式来描述：（1）典型模式，即反气旋环流，其源沃茨源自缅因州沿海海湾;（2）“分流模式”，其特征是斯科舍陆架水穿过东北海峡直接注入乔治岸南侧。本研究的主要目的是评估这两种循环模式所解释的生物学差异量。该项目将使用水中的氧同位素示踪剂氧-18来区分当地和上游的淡水来源，并定量估计每种淡水来源对乔治银行水的贡献百分比。该项目是美国GLOBEC西北大西洋实地研究第二阶段计划的一部分。 ***