基于SRTM数字高程模型的WRF低空风场模拟研究  

WRF Simulation of Low-level Wind Field Based on SRTM Digital Elevation Model

作　　者：蒋立辉[1] 徐浩然[1] 庄子波[1] 郭炜[1] 

机构地区：[1]中国民航大学,天津300300

出　　处：《中国民航飞行学院学报》2015年第2期13-17,22,共6页Journal of Civil Aviation Flight University of China

摘　　要：针对复杂地形条件下的中小尺度的低空风场模拟受地形影响较大,特别是机场周围的低空风切变严重影响现代民航的飞行安全。文中提出利用WPSGeo Tiff、GRASS GIS等技术,将美国航空航天局和美国国防部国家测绘局联合提供的精度为90 m(30s)的SRTM(Shuttle Radar Topography Mission)高精度数字高程数据Digital Elevation Model(DEM)替换到中小尺度数值预报模式Weather Research and Forecasting Model(WRF)中。通过对北京2013年3月9日一次大风天气的模拟,检验SRTM DEM数据对WRF风场模拟精度的影响。模拟结果表明新引入的SRTM DEM数据更真实地反映了北京地区的地形高度特征,尤其是地形复杂区域的高度特征。同时由于高度信息误差的减小,增强了WRF模式在北京地区复杂地形条件下的风场模拟能力。In complex terrain conditions, small-scale low-level wind field may be influenced by the terrain, especially low level wind shear around the airport which seriously threatens the modern civil aviation flight safety. This paper puts forward the idea of using SRTM（with accuracy of 90m）provided by NASA and the U. S. Department of Defense National Mapping Agency（NIMA） to substitute the mesoscale numerical weather prediction model by applying the WPSGeo Tiff and GRASS GIS technology. A test is made on the influence for WRF wind simulation by DEM data through a windy weather happened on March 9, 2013 in Beijing. The simulation result shows that the new-introduction of the DEM data have a more realistic reflection of the terrain characteristics in Beijing area, especially under conditions of highly complex terrain features. It also shows that simulation capability of WRF model is enhanced with reducing height information errors.

关 键 词：WRF SRTM数字高程模型 低空风场 

分 类 号：V321.225[航空宇航科学与技术—人机与环境工程]