气象与环境学报2024，Vol.40Issue(4)：64-71,8.DOI:10.3969/j.issn.1673-503X.2024.04.008
1961-2020年松花江流域作物生长季降水主模态气候特征及其异常成因分析
Analysis of the precipitation patterns and causes of anomalies in crop growing season in the Songhua River Basin from 1961 to 2020
摘要
Abstract
Daily precipitation observational data from 95 stations in the Songhua River Basin from May to Septem-ber during 1961-2020,monthly JRA-55 reanalysis data,and sea surface temperature data were utilized to analyze the main precipitation patterns and causes of anomalies in crop growing season in this region,and to explore its mechanism and precursor signals.The results showed that there are primarily two spatial modes of precipitation during the crop growing season in the Songhua River Basin,i.e.the basin-wide mode and the east-west opposite mode.The basin-wide mode is dominant in the 1980s and 1990s,while the east-west opposite mode prevails in the first decade of the 21st century.In recent years,the basin-wide mode has been predominant.The basin-wide precip-itation mode is influenced by both mid-high latitude and low latitude systems,while the east-west opposite precipi-tation mode is mainly affected by the mid-high latitude circulation over Eurasia.The circulation systems influen-cing precipitation in the Songhua River Basin are primarily located in the Baikal Lake and Okhotsk Sea regions.For the basin-wide precipitation mode,the water vapor budget shows input from the western boundary and output from the eastern boundary.In the years of above-normal precipitation,both southern and northern boundaries expe-rience water vapor input,while during below-average periods,water vapor input is found from the northern bound-ary and output from the southern boundary.For the east-west opposite precipitation mode,the water vapor budget exhibits input from one boundary and output from the other for both the south-north and east-west boundaries.关键词
空间模态/水汽收支/降水/环流系统Key words
Spatial patterns/Water vapor budget/Precipitation/Circulation systems分类
天文与地球科学引用本文复制引用
王莹,王宇凡,徐永清,赵佳莹,班晋,李永生..1961-2020年松花江流域作物生长季降水主模态气候特征及其异常成因分析[J].气象与环境学报,2024,40(4):64-71,8.基金项目
中国气象局气象能力提升联合研究专项(22NLTSY001)、黑龙江省自然科学基金项目(LH2022D022)和中国气象局沈阳大气环境研究所联合开放基金(2021SYIAEKFMS10)共同资助. （22NLTSY001）
