2003年度冬季东海暖流状态分析

由黑潮派生的各种暖流在冬季对东海而言是重要的热能来源,它们的态势会极大地影响东海的温度分布,从而影响到生态系统的变化和发展。通过对2003年度冬东海暖流主干温度、暖舌前锋位置进行空间分析,并与历史状况比较显示今冬的黑潮、台湾暖流和对马暖流都接近历史最强水平,而黄海暖流也比多年平均略强一些。同时期沿岸水体的表面温度与历史的比较结果显示出与多年平均差不多的状况,且在整个冬季表现出明显地随沿岸气候变化的波动状态。所以,2003年度冬暖流的强势对暖流附近海域有一定的影响但并未波及沿岸海域。而对黑潮与其他暖流、沿岸水体以及中西太平洋热带表面水温的相关分析表明,黑潮对对马暖流、台湾暖流有很强的影响作用,但对黄海暖流、沿岸水体的影响不明显,此外,黑潮的水温变化则与中西太平洋热带海域水温的变化有关。

Analysis on the winter warm currents in the East China Sea in the winter of 2003

Deriving from Kuroshio, the warm currents are important sources of heat energy for the East China Sea, especially in winter. Their strengths will greatly influence the structure of temperature of the sea and affect further the variation and development of the ecosystem. By analyzing temperatures and fronts of the warm currents in the East China Sea in the winter of 2003, and comparing them with the situations in different years, it can be seen that the strengths of Kuroshio, Taiwan warm current and Tsujima warm current are nearly their highest in history, while the Yellow-sea warm current is only slightly stronger than the average. And the comparison of the temperature of the Jiangsu offshore waters in this winter with its temperatures in different years shows little difference from average, and it fluctuated with the climate severely. Therefore, the stronger warm currents only affected the surrounding areas and did not spread to offshore waters. The cross-correlation analyses indicate that Kuroshio impacts Tsushima warm current and Taiwan warm current acutely, but touches little on Yellow-sea warm current and offshore waters. And the temperature of Kuroshio varies with the temperature in the tropical Western and Central Pacific Ocean.