基于HYSPLIT模式的济南机场一次暴雨过程的水汽输送特征分析

利用NCEP再分析资料，结合HYSPLIT轨迹模式对 2018年6月25日发生在济南遥墙国际机场的一次大暴雨过程的水汽条件及输送过程进行分析。结果表明：此次大暴雨的水汽输送通道主要有3支，一支是源自对流层中层的西北气流输送，另一支是西太平洋上副热带高压边缘东南气流输送，第三支是南海上空向北的气流输送，三支通道中，西太平洋通道和南海通道对暴雨的水汽贡献最大，分别为46%和42%，来自西北通道的水汽输送相对较少，它对暴雨的水汽贡献仅为12%；进一步的分析表明，在850 hPa以下的对流层底部，来自西太平洋通道的水汽输送占据主导地位，而在700 hPa以上的对流层中层，则是来自南海通道的水汽输送占据主导地位。

Analysis of water vapor transport characteristics during a torrential rain at Jinan Airport based on the HYSPLIT model

Using NCEP reanalysis data and the HYSPLIT model, the water vapor transport characteristics during a torrential rain on 25 June 2018 at Jinan Yaoqiang International Airport are analyzed. The results show that there are three major water vapor channels for this torrential rain. One is the northwestern air flow in the middle troposphere, another is the southeastern air flow near the western Pacific subtropical high, and the other is the northward air flow from the South China Sea. The water vapor mainly comes from the western Pacific and the South China Sea, and the contribution rate to the torrential rain is 46% and 42%, respectively. The water vapor from the northwestern channel is less, and its contribution rate is only 12%. Further analysis indicates that the water vapor transport by the western Pacific channel dominates at the bottom of the troposphere below 850 hPa, while the water vapor transport by the South China Sea channel dominates in the middle troposphere above 700 hPa.