论文部分内容阅读
通过数值模拟和理论分析 ,文中指出在强东亚季风期间不仅在欧亚大陆和北印度洋出现强大的反气旋环流异常 ,而且通过海气相互作用在北太平洋西部和西北部形成异常气旋式流场 ;在其东南部产生异常反气旋式流场。在这种流场异常的驱动下赤道西太平洋西风加强 ,海面升高 ,海表温度上升 ,赤道中东印度洋和东太平洋东风加强 ,海面降低 ,海表温度下降。证明由于海表温度异常及海表温度变化趋势存在积分关系 ,因此持续的强东亚冬季风所强迫的沿赤道海表温度变化趋势的上述分布的强讯号可以在海洋中存在近一年之久 ,为尔后赤道太平洋 ENSO事件的可能发展提供初始条件 ,也为跨季度气候预测提供前期讯号
Through numerical simulation and theoretical analysis, it is pointed out that during the strong East Asian monsoon, strong anticyclone anomalies not only occur in Eurasia and the North Indian Ocean, but also form abnormal cyclonic flow fields in the western and northwestern North Pacific through sea-air interaction. Anomalous anticyclonic flow fields occur in the southeast. Driven by this anomalous flow field, the westerly winds of the western equatorial Pacific strengthened, the sea surface increased, and the sea surface temperature increased. The easterlies in the equatorial central and eastern Indian Ocean and the eastern Pacific strengthened, the sea surface decreased, and the sea surface temperature dropped. It is proved that due to the integral relationship between the sea surface temperature anomaly and the sea surface temperature change trend, the strong signal of the above distribution along the trend of equatorial sea surface temperature forced by the continuous strong East Asian winter monsoon can exist in the sea for nearly a year, Provide the initial conditions for the possible development of the ENSO event in the equatorial Pacific thereafter and also provide a preliminary signal for the cross-quarter climate prediction