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Shelfbreak Jet Structure and Variability off New Jersey Using Ship of Opportunity Data From the CMV Oleander
Journal of Geophysical Research: Oceans ( IF 3.6 ) Pub Date : 2020-08-30 , DOI: 10.1029/2020jc016455
Jacob Forsyth 1, 2 , Magdalena Andres 1 , Glen Gawarkiewicz 1
Affiliation  

Repeat measurements of velocity and temperature profiles from the Container Motor Vessel (CMV) Oleander provide an unprecedented look into the variability on the New Jersey Shelf and upper continental slope. Here 1362 acoustic Doppler current profiler (ADCP) velocity sections collected between 1994 and 2018 are analyzed in both Eulerian and stream coordinate reference frames to characterize the mean structure of the Shelfbreak Jet, as well as its seasonal to decadal variability. The Eulerian mean Shelfbreak Jet has a maximum jet velocity of 0.12 m s−1. The maximum jet velocity peaks in April and May and reaches its minimum in July and August. In a stream coordinate framework, the jet is only identified in 61% of transects, and the mean stream coordinate Shelfbreak Jet has a maximum jet velocity of 0.32 m s−1. Evidence is found that Warm Core Rings, originating from the Gulf Stream arriving in the Slope Sea adjacent to the New Jersey Shelf, shift the Shelfbreak Jet onshore of its mean position or entirely shutdown the Shelfbreak Jet's flow. At interannual timescales, variability in the Shelfbreak Jet velocity is correlated with the temperature on the New Jersey Shelf 2 months later. When considered in a stream coordinate framework, Shelfbreak Jet have decreased over the time period considered in the study.

中文翻译:

使用来自CMV夹竹桃的机会数据船在新泽西州以外的搁架式喷气式飞机结构和可变性

重复测量集装箱机动船(CMV)夹竹桃的速度和温度分布,可以前所未有地了解新泽西架和大陆上坡的变化。在这里,在1994年至2018年之间收集的1362个声学多普勒电流剖面仪(ADCP)速度剖面在欧拉和水流坐标参考系中进行了分析,以表征Shelfbreak Jet的平均结构及其季节性到年代际变化的特征。欧拉平均棚架喷流的最大喷流速度为0.12 m s -1。最高射流速度在4月和5月达到峰值,并在7月和8月达到最小值。在流坐标框架中,仅在61%的断面中识别出射流,平均流坐标Shelfbreak Jet的最大射流速度为0.32 m s -1。有证据表明,源自墨西哥湾流的新泽西州陆架附近斜坡海的暖芯环使陆架喷气式飞机沿岸平移至其平均位置,或完全关闭了陆架喷气式飞机的流量。在每年的时间尺度上,两个月后,“棚架射流”速度的变化与新泽西架子上的温度相关。在河流坐标系中考虑时,Shelfbreak Jet在研究中所考虑的时间段内有所减少。
更新日期:2020-09-11
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