全球定位系统2024，Vol.49Issue(5)：65-72,8.DOI:10.12265/j.gnss.2024067
基于北斗三号和风云四号A星的大通"817"极端降雨特征分析
Analysis of extreme rainfall characteristics of Datong"817"based on BDS-3 and FY-4A
摘要
Abstract
Adequate water vapor and cloud phase changes are two necessary conditions for rainfall to occur.Based on the BeiDou-3 satellite navigation system,water vapor can be retrieved,which has the advantages of high time resolution and accuracy;FY-4A can provide cloud phase parameters with a resolution of 15 minutes.This article uses the BDS-3 and FY-4A data to analyze the spatiotemporal changes in atmospheric precipitation and cloud phase before and after the occurrence of all precipitation in August 2022.Through comparison,three characteristics of extreme rainfall in Datong"817"were obtained:firstly,the perceptible water vapor increased one hour before rainfall,reaching a rate of 3.17 mm/h,significantly exceeding the general rainfall level of the same period;before the second rainfall,there were multiple changes in cloud types between multi-layer clouds and opaque ice clouds,and eventually extreme rainfall occurred in the form of opaque ice clouds;the third reason is that the height of extreme rainfall cloud tops is usually greater than 10000 meters.关键词
北斗三号卫星导航系统(BDS-3)/极端降雨/可降雨量/云顶参数Key words
BDS-3/extreme rainfall/PWV/cloud top parameters分类
天文与地球科学引用本文复制引用
赵利江,赵健赟..基于北斗三号和风云四号A星的大通"817"极端降雨特征分析[J].全球定位系统,2024,49(5):65-72,8.基金项目
青海省重点研发与转化计划(2023-SF-122) （2023-SF-122）
