基于Google Earth Engine的湖北省长序列及特型年降雨研究

Study on the long-term and special annual rainfall in Hubei Province based on Google Earth Engine

摘要: 湖北省地处北亚热带季风气候区，水旱灾害频发，为了更加全面地了解湖北省降雨量变化规律及时空分布特征，利用Google Earth Engine平台对1979—2019年湖北省逐日降雨量数据进行筛选、云端计算及时空变化分析。结果表明：近41年来，湖北省年降雨量呈下降趋势，2019年省内年降雨量达到历史第2低；湖北省北部地区降水严重不足，且中部、东南部、西南部地区出现了降雨减少的趋势。

Abstract: Hubei Province is located in the north subtropical monsoon climate zone, where floods and droughts occur frequently.In order to have a more comprehensive understanding of the variation rules and spatial and temporal distribution characteristics of rainfall in Hubei Province, the Google Earth Engine platform was used to screen, compute in the cloud and analyze the temporal and spatial variation of daily rainfall data of Hubei Province from 1979 to 2019.The results show that the annual rainfall in Hubei Province has been decreasing in the past 41 years, and the average rainfall in 2019 reached the second-lowest in history.The precipitation in the northern part of Hubei Province is seriously insufficient, and the rainfall in the central part, the southeastern part, and the southwestern part of Hubei Province shows a trend of decreasing.