长江中下游地区一次辐射雾的数值模拟

为了解中尺度数值模式对辐射雾的模拟能力及对辐射雾生消有明显影响的物理过程，利用MM5模式对2003年12月11、12日的1次辐射雾生消过程进行了数值模拟研究。并针对明显影响辐射雾生消的微物理过程和辐射传输过程，以及模式水平分辨率精度进行了3组敏感性对比模拟试验。结果表明，适当选取中尺度数值模式中的物理参数化方案和水平分辨率，可以有效地模拟出辐射雾的生消及分布，模拟雾的生成时间、高度和雾区范围与实况较为相近。

Numerical simulation of radiation fog event in Yangtze River

In order to study the simulation efficiency of the mesoscale model on radiation fog, the mesoscale model MM5 was used to simulate the heavy radiation fog of 11-12 December 2003. Furthermore, aiming at explicit moisture schemes, radiation schemes and horizontal resolutions, three sensitivity experiments were performed. The simulated results show that the mesoscale model MM5 can reproduce the circulation, main features of the weather pattern and the heavy radiation fog. Especially, the occurrence, location and height of the fog are in accordance with the observation.