地球自转年际变化作用于全球海温异常的观测事实和数值试验

The Observational Study and Numerical Experiment on the Effect of the Variation of the Earth's Rotation on the Global

本文通过１２年１４４个月的全球海温距平格点资料分析得到ＥｌＮｉｎｏ和反ＥｌＮｉｎｏ事件只是全球海温异常变化的一个部分，全球各大洋海温变化具有一定的联系。通过一个简化的一层海洋模式对全球海温异常变化的模拟发现，地球自转速度变化首先引起纬向风的异常，再由异常的纬向风切应力作用于洋流和海温的异常，这一简化的海洋模式基本上模拟出了全球各大洋海温时空分布实况的变化特征。具体表现为：地球自转速度减慢（加快）时，大洋低纬度东部升温（降温），太平洋的西北部和西南部降温（升温），大西洋和印度洋中高纬海域降温（升温）。

Based on the global sea surface temperature anomalies (SSTA) of 144 months in 12 years, it is revealed that the El Nino or anti-El Nino is one part of the global SSTA and relatioinship exists between SSTAs for different oceans. Using a simple ocean model, it can be seen that the variation of the earth's rotation rate will cause the anomaly of zonal wind and then the abnormal stress force of zonal wind will cause anomaly of the current and the sea surface temperature. Most of the simulated features of temporal-spatial evolution in different oceans are in agreement with those observer: when the rate of the earth's rotation decelerated (accelerated), the SST in the east part of low-latitude oceans increased (decreased). while the SST in the northwest and southwest areas of the Pacific, mid-high latitude area of Atlantic and the Indian Ocean decreased (increased).