Simulation of Water Age and Residence Time in New York Bight
Simulation of Water Age and Residence Time in New York Bight
复制标题
DOI：
10.1175/2009jpo4249.1
复制
发表时间：
2010-05
影响因子：
3.5
通讯作者：
W. Zhang;J. Wilkin;O. Schofield
中科院分区：
文献类型：
--
作者：
W. Zhang;J. Wilkin;O. Schofield
摘要河流入流在近海的时间尺度与许多地球化学和环境过程有关。这些时间尺度的哈德逊河羽在其进入纽约湾（NYB）的建模研究进行了检查。组分导向的年龄和停留时间理论应用于计算两个时间尺度：平均年龄，这是从两个模型示踪剂的比率计算，和停留时间，这是使用示踪剂守恒方程的伴随计算。空间和时间变化与河流流量和风的影响。河流的高流量降低了地表水的年龄，缩短了在NYB顶点的停留时间。东风增加了地表水的年龄，延长了沿着长岛海岸的沃茨保持在NYB顶点的持续时间。南风增加沿着新泽西海岸的年龄，但减少近海表层沃茨的年龄，并延长靠近新泽西海岸的表层沃茨停留的时间。
Abstract The time scales on which river inflows disperse in the coastal ocean are relevant to a host of biogeochemical and environmental processes. These time scales are examined in a modeling study of the Hudson River plume on its entry to the New York Bight (NYB). Constituent-oriented age and residence-time theory is applied to compute two time scales: mean age, which is calculated from the ratio of two model tracers, and residence time, which is calculated using the adjoint of the tracer conservation equation. Spatial and temporal variability associated with river discharge and wind is investigated. High river discharge lowers surface water age and shortens residence time in the apex of the NYB. Easterly winds increase surface water age and extend the duration waters along the Long Island coast remain in the NYB apex. Southerly winds increase age along the New Jersey coast but drive a decrease in age of offshore surface waters and prolong the time that surface waters close to the New Jersey coast stay ...