Seasonal evolution of hydrographic fields in the central Middle Atlantic Bight from glider observations
Seasonal evolution of hydrographic fields in the central Middle Atlantic Bight from glider observations
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DOI：
10.1029/2007gl032335
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发表时间：
2008-02
影响因子：
5.2
通讯作者：
R. Castelao;S. Glenn;O. Schofield;R. Chant;J. Wilkin;J. Kohut
中科院分区：
文献类型：
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作者：
R. Castelao;S. Glenn;O. Schofield;R. Chant;J. Wilkin;J. Kohut
在大西洋中部海湾的第一次持续的滑翔机观测被用来描述新泽西州近海水文场的季节演变。近地表温度响应地表加热的季节性周期，而深水主要受春季/夏季冷池中来自北方的冷水平流和秋季混合而变暖的影响。温跃层厚度在近海方向增加。由于河流流量和风的变化，盐度呈现出季节性变化，从5月到9月，低盐度水域横跨大陆架∼100公里，表层∼厚10米。从4月/5月到夏末，层化加剧，特别是在距离海岸80公里以内。夏末水柱中的跃层加深，而秋季暴风雨的通过使层结迅速减弱。滑翔机的高分辨率观测使人们能够对可变性的空间尺度进行前所未有的详细描述。
The first sustained glider observations in the Middle Atlantic Bight are used to describe the seasonal evolution of hydrographic fields off New Jersey. Near‐surface temperatures respond to the seasonal cycle of surface heating, while waters at depth are primarily influenced by advection of cold waters from the north in the cold‐pool during spring/summer, and warming due to mixing during fall. The thermocline thickness increases in the offshore direction. Salinity presents seasonal variability due to river discharge and wind variations, with low‐salinity waters spanning ∼100 km across the shelf from May to September in a ∼10 m thick surface layer. Stratification intensifies from April/May to late summer, especially within 80 km from the coast. The pycnocline deepens in the water column during late summer, while the passage of storms during fall rapidly reduces the stratification. The glider high‐resolution observations allowed for unprecedented detailed characterization of the spatial scales of variability.