大气科学2025，Vol.49Issue(2)：447-459,13.DOI:10.3878/j.issn.1006-9895.2401.23127
东北冷涡暖季气候特征及其降水在黑龙江省的时空分布
Climatic Characteristics of the Northeast Cold Vortex and Its Spatiotemporal Distribution of Precipitation during the Warm Season in Heilongjiang Province
摘要
Abstract
Based on hourly precipitation data from 80 national stations in Heilongjiang Province and reanalysis data jointly produced by the National Center for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR),we analyzed the climatic characteristics of the Northeast cold vortex(NECV)and its precipitation during the warm season from May to September between 1981 and 2022.The study focused on the spatiotemporal distribution of NECV precipitation in the complex terrain of Heilongjiang Province.The key findings include:(1)In Heilongjiang Province,the average annual precipitation during the warm season and the precipitation of NECV processes and their proportion in the warm season demonstrated significant interannual and interdecadal variations.Before 1998,warm-season precipitation gradually decreased,followed by an obvious increase,while NECV precipitation showed an overall upward trend.(2)Precipitation and its frequency peaked from 1400 BJT to 1700 BJT.The daily variation in precipitation was more pronounced than that of its frequency,especially for higher intensity precipitation,which exhibited significant daily and yearly variations.(3)Heavy precipitation occurred more frequently during the daytime than at night.The greater the precipitation intensity,the greater the influence on total precipitation.The contribution of heavy precipitation in NECV processes has been increasing,with stronger precipitation showing a more pronounced upward trend,while the contribution of weak precipitation has been declining.(4)The spatial distribution of extreme values was strongly affected by local topography.The area transitioning from plain to mountainous areas recorded the highest extreme precipitation values,indicating a higher likelihood of heavy precipitation,while extreme values were lower in purely mountainous or plain areas.关键词
东北冷涡/日变化/空间分布/地形/短时强降水Key words
Northeast cold vortex(NECV)/Daily variation/Spatial distribution/Terrain/Short-time heavy precipitation分类
天文与地球科学引用本文复制引用
任丽,刘颖..东北冷涡暖季气候特征及其降水在黑龙江省的时空分布[J].大气科学,2025,49(2):447-459,13.基金项目
国家重点研发计划项目2018YFC1507303,中国气象局创新发展专项CXFZ2023J011,黑龙江省自然科学基金联合引导项目LH2019D016 Funded by National Key Research and Development Program of China(Grant 2018YFC1507303),Innovative Development Project of China Meteorological Administration(Grant CXFZ2023J011),Heilongjiang Natural Science Foundation Joint Guidance Project(Grant LH2019D016) （Grant 2018YFC1507303）
