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Seasonal variability and dynamics of coastal sea surface temperature fronts in the East China Sea

机译：东海沿海海面温度阵线的季节变异性和动态

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摘要

Fronts in coastal oceans are important mesoscale processes that relate to regional dynamics and can impact ecosystems. The daily distribution of a sea surface temperature (SST) front is obtained in the East China Sea (ECS) using 15 years of satellite observations. High frontal activities are mainly found near the coast. The spatial and temporal variability of the monthly frontal probability is subsequently investigated using an empirical orthogonal function (EOF). Seasonal variability in frontal activities is predominant for the majority of the ECS, with the highest and lowest values occurring during winter and summer, respectively. Some major fronts have been identified, such as coastal and shelf fronts. The coastal fronts can be further divided into three separate sections: near Hangzhou Bay and along the Jiangsu and Zhejiang coasts, respectively. The shelf fronts have two sections: north and south of the Changjiang River. All fronts are characterized by a prominent seasonal cycle, though their seasonalities differ. The underlying driving forces, e.g., alongshore wind, SST, and river discharge, are further analyzed for the individual fronts. River discharge is the driving factor of fronts to the south of the Hangzhou Bay along the Zhejiang coasts while wind is the main reason for the frontogenesis near and north of Hangzhou Bay. The SST largely influences the frontal dynamics for the shelf and coastal fronts to the north. This study comprehensively describes the frontal activities in the ECS and leads to a better understanding of frontogenesis in the coastal region. It is fundamentally helpful for fisheries management and has great potential for oceanic pollution control.
机译：沿海海洋的前沿是与区域动态相关的重要介质过程，并可能影响生态系统。使用15年的卫星观察，在东海（ECS）中获得海面温度（SST）前线的日常分布。海岸附近有高正面活动。随后使用经验正交函数（EOF）来研究月度正面概率的空间和时间可变性。正面活动中的季节性变异是大多数EC的主要原因，分别在冬季和夏季发生最高和最低值。已经确定了一些主要的前沿，例如沿海和架子架。沿海前沿可以进一步分为三个独立的部分：杭州湾和江苏和浙江海岸附近。货架前沿有两个部分：长江北部和南部。所有前锋都是一个突出的季节循环，但它们的呼气态度不同。潜在的驱动力，例如，沿岸风，SST和河流放电进一步分析了各个方向。河流排放是沿浙江海岸杭州海湾南部的驾驶系数，而风是杭州湾近端的主要原因。 SST很大程度上影响了货架和沿海前沿的正面动态。本研究全面描述了ECS中的正面活动，并更好地了解沿海地区的前源。它对渔业管理并具有很大的潜力，对海洋污染控制具有很大的兴趣。

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  • 来源
    《Ocean Dynamics》 |2021年第2期|237-249|共13页
  • 作者

    Lu Cao; Rui Tang; Wei Huang; Yuntao Wang;

  • 作者单位

    School of Port and Transportation Engineering Zhejiang Ocean University Zhoushan China;

    State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography Ministry of Natural Resources Hangzhou China;

    State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography Ministry of Natural Resources Hangzhou China Key Laboratory of Marine Ecosystem and Biogeochemistry Second Institute of Oceanography Ministry of Natural Resources Hangzhou China;

    State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography Ministry of Natural Resources Hangzhou China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Front; Sea surface temperature; Wind stress; River discharge; East China Sea; Seasonal variability;

    机译：正面;海表面温度;风压;河流放电;东海;季节变异性;

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