东中国海海温在增暖停滞期的变化特征及成因分析-海洋预报

东中国海海温在增暖停滞期的变化特征及成因分析

单位：1. 国家海洋局天津海洋环境监测中心站, 天津市海洋环境监测预报中心, 天津 300457;
2. 广东海洋大学海洋与气象学院/南海海洋气象研究院, 广东湛江 524088

分类号：P731.11

出版年·卷·期（页码）：2021·38·第一期（78-82）

摘要：

通过HadSST3原始观测数据和HadISST1重组数据，分析了东中国海海温在增暖停滞期（1998—2014年）的变化特征。研究表明：两组数据的海温变化特征和程度相似。在增暖停滞期，渤海、黄海和东海海温线性趋势主要表现为负，降温最多的集中在长江口附近，约-1℃。渤海、黄海及东海部分区域的净热通量对海温降低起正作用，而在东海黑潮区海洋的净热通量对海温降低起负作用，黑潮入侵的减弱可能是东海海表温度下降的主要原因。在增暖停滞期，海温变化趋势具有较显著的区域性季节特征。春季海温几乎呈现全海盆的下降趋势，尤以长江口附近下降最多，可达-1.4℃；夏季海温下降趋势较春季减弱，下降最多的地区主要集中在渤海；秋季渤海海温下降较明显；冬季海温变化主要在长江口沿岸，渤黄海海温的变化并不明显。

In this study, the trends of SST over the eastern China seas in the warming hiatus period (1998-2014) are analyzed using the un-interpolated dataset HadSST3 and the reconstructed dataset HadISST1. The results show that the SST in the Bohai Sea, Yellow Sea and East China Sea mainly reveals a decreasing trend during the warming hiatus period with the maximum value of about -1℃ near the Yangtze River estuary. The net heat flux plays a positive role in the decrease of SST in the Bohai Sea, Yellow Sea and part of the East China Sea. However, it plays a negative role in the Kuroshio area of the East China Sea, where the weakening of Kuroshio intrusion may be the main reason for the decrease of SST. The trend of SST variation reveals significant regional and seasonal characteristics during the warming hiatus period. In spring, the SST shows a decreasing trend over almost the whole eastern China seas, especially for the area near Yangtze River estuary where the SST decreases by about -1.4℃. The decreasing trend of SST in summer is weaker than that in spring, and the most decreasing area is mainly in the Bohai Sea. In autumn, the SST in the Bohai Sea decreases significantly. In winter, the SST variation is mainly along the Yangtze River Estuary, while it is not significant in the Bohai Sea and Yellow Sea.

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