冬季菲律宾周围对流活动与北太平洋风暴轴联系的数值模拟

通过利用IAP 2-L AGCM进行的数值模拟，进一步揭示了冬季菲律宾周围对流活动异常对北太平洋风暴轴变化的影响及其二者联系的物理机制和物理过程。结果表明:当菲律宾周围对流活动增强时，在500 hPa等压面图上强迫产生一个自赤道西太平洋开始，经我国东部、堪察加半岛、白令海，到美国西海岸的异常波列；位于西太平洋的经向三圈环流增强，位置北移；在风暴轴的西半部和东端斜压性增强；从而导致了北太平洋风暴轴增强、北抬、东伸。

Simulation Study of the Connection between Convective Activities around the Philippines and the Storm Track in the North Pacific in Winter

The impacts of the convective activity anomaly around the Philippines in winter on the variation of the storm track in the North Pacific and its physical mechanism are further investigated by the numerical simulation of IAP 2-L AGCM in this paper It is shown that when the convective activities around the Philippines are active, a forced anomaly wave train, from the equator west Pacific to the west coast of USA via the eastern China, Kamchatka Peninsula, Bering Sea, is formed in the 500 hPa isobaric chart; the meridional circulation of the three cells over the west Pacific intensifies, its location moves northward; and baroclinity in the west half and the eastern end part of the storm track increases, as a result, the storm track in the North Pacific strengthens and moves northward and eastward