水土保持研究2024，Vol.31Issue(1)：224-231,8.DOI:10.13869/j.cnki.rswc.2024.01.018
基于REOF分析的山东省年降水区域特征及趋势分析
Regional Characteristics and Trend Analysis of Annual Precipitation in Shandong Province Based on REOF
摘要
Abstract
[Objective]Exploring the spatiotemporal characteristics of annual precipitation in different climate zones in Shandong Province is expected to provide a more regional reference basis for climate analysis,disas-ter prevention and reduction in the region.[Methods]According to the annual precipitation data of ground meteorological observatories in 95 countries of Shandong Province in the period from 1991 to 2020,the annual precipitation data in Shandong Province were divided into climate regions,and then the spatiotempo-ral variation characteristics of precipitation in each region were analyzed by using relevant statistical methods.[Results](1)In Shandong Province,there were more years with less precipitation modalities,and more precipitation intensity in years with more precipitation,and the interdecadal variation was obvious,but the distribution and intensity changes of years with more and less precipitation in each mode were different.(2)The annual precipitation in Shandong Province decreases from southeast to northwest.The annual precipitation data were divided into three regions:southeast coastal area(Zone Ⅰ),northwest plain area(Zone Ⅱ)and central hilly area(Zone Ⅲ).The annual precipitation in each precipitation region showed no significant increase trend,with different trend rates and no obvious mutation.(3)The annual precipitation of each precipitation subarea in Shandong Province had obvious periodic characteristics.There were two obvious energy centers in the annual precipitation data of the southeast coastal area,with the central scale of 2～3 years,and the future change has strong sustainability.There were three obvious energy centers in the annual precipitation data in the northwest plain,with the central scales of 5～7 years,3 a and 2～3 years,respec-tively.There were two obvious energy centers in the annual precipitation data in the central hilly region,with the central scales of 2～3 years and 6 years,respectively.The future changes are of strong sustainability.[Conclusion]Shandong Province has more years with less precipitation and more precipitation intensity,and the annual precipitation field can be roughly divided into three zones,and the annual precipitation in each region has obvious cyclical characteristics,and future changes are continuous.关键词
年降水/区域特征/旋转经验正交函数/重标极差分析法/山东省Key words
precipitation/regional characteristics/rotating empirical orthogonal function/rescaled range analysis/Shandong Province分类
天文与地球科学引用本文复制引用
任建成,谷山青,卢晓宁..基于REOF分析的山东省年降水区域特征及趋势分析[J].水土保持研究,2024,31(1):224-231,8.基金项目
国家自然科学基金项目(41401103) （41401103）
山东省气象局科学研究项目(SDYBY2020-11) （SDYBY2020-11）
