摘要
Abstract
Using global digital elevation model data with a spatial resolution of 30M,altitude,aspect,and slope data were extracted,and combined with routine observation data from automatic stations,the impact of topography in Putuo area on precipitation was explored.The following conclusions are drawn:①The terrain of Putuo District is a typical island with low mountains and hills.90%of the area is below 150 meters high.The overall terrain is gentle.The coastal areas are mainly flat and gentle slopes.Most of the mountainous areas in the central part of the island are steep slopes,and the proportion of sharp slopes and dangerous slopes is low.②Affected by terrain undulation,the northeast and south winds play a positive lifting role at most rainfall stations,and the north and southwest winds play a negative lifting role at most rainfall stations,which is related to the direction of the large mountain ranges in Putuo District.③The dynamic lifting effect of the terrain in Putuo District and the correlation between altitude and precipitation are poor.This is related to the low terrain of Putuo and the inability to transport water vapor to the lifting condensation height,the scattered islands in the region,the small total mountainous area,the large terrain range,the small scale weather system,the spatial discontinuity of data between islands,and the impact of the ocean on precipitation.关键词
普陀区/地形动力抬升/坡向坡度/降水分布/数字高程模型Key words
Putuo District/terrain dynamic lifting/aspect and slope/precipitation distribution/digital elevation model分类
天文与地球科学
