水汽输送异常对中国西南地区的影响研究

摘要

在天气和气候诊断当中引入拉格朗日气流轨迹模式HYSPLITv4.9,通过对研究区域内气流三维轨迹的模拟,主要解决了两方面的问题:①比较精确地确定了气流的源区和汇区；②能够明确地反映气流在输送过程中空间位置和物理状态的变化.通过拉格朗日气流轨迹模式图,气团的高度随时间变化图,同一气团的比湿状况随高度的变化图,具体分析水汽输送对我国西南地区的影响.%Airflow Trajectory Model (HYSPLITv4. 9 ) based on Lagrange method is applied to weather and climate diagnose. By simulating three-dimensional airflow trajectory in the target area, 2 problems are solved mainly; ① Source region and sink area of airflow are determined precisely. ② Spatial location and physical state change of the airflow transportation is definitely reflected. Influences of moisture transport in Southwest China are analyzed concretely according to Airflow Trajectory Model ( HYSPLITv4. 9 ) based on Lagrange method, time-dependent curve of air mass and height dependent curve of specific humidity of the same air mass.