安徽农学通报2026，Vol.32Issue(9)：106-109,4.DOI:10.16377/j.cnki.issn1007-7731.2026.09.026
黔东北2021年9月异常高温成因分析
Analysis of the causes of abnormally high temperature in September 2021 in Northeast Guizhou
陈超 1蔡成瑶 1吴弘智 1桂永刚 1李习瑾 1胡萍1
作者信息
- 1. 贵州省铜仁市气象局,贵州 铜仁 554300
- 折叠
摘要
Abstract
Based on the monthly mean temperature observation data from national surface meteorological stations in Northeastern Guizhou from 1961 to September 2023,this study analyzed the climatic characteristics of September in this region.Furthermore,using NCEP reanalysis data from 1991 to 2021,the circulation characteristics such as geopotential height field,horizontal wind field and sea level pressure field under high temperature conditions in September were examined to explore the formation mechanisms of high temperatures.The results showed that the study region was dominated by low-temperature anomalies from the 1960s to the 1980s,while high temperature anomalies prevailed from the 1990 to 2023.Notably,the temperature in September 2021 was abnormally high by 3.1℃,with high temperatures mainly occurring in the early and late dekads of the month.Circulation analysis indicated that the abnormally high average temperature in northeastern Guizhou in September 2021 was mainly caused by the stronger intensity,larger extent,more westward extension ridge point and northward shifted ridge line of the Western Pacific Subtropical High,which exerted prolonged control over the region.The upper-level westerly jet core was located 5° north of the climatological mean,which inhibited the southward intrusion of westerly disturbances into low-latitude areas.In addition,the lower-level wind field exerted a significant influence on air mass activities,characterized by prominent southwesterly wind anomalies that facilitated the northward transport of warm air from the south.Moreover,A significant negative anomaly zone extends from the region of 60°-75° N,70°-130° E to the areas of 35°-55° N,110°-120° E and 20°-50° N,120°-150° E,accompanied by negative anomalies in Northeast China and Eastern Europe,which were unfavorable for the southward movement of cold air,thus providing favorable conditions for the occurrence and development of persistent anomalous high temperatures throughout the month.The results provide a reference for local high-temperature early warning and agricultural production decision-making.关键词
异常高温/环流特征/位势高度场/水平风场Key words
abnormally high temperature/circulation characteristics/geopotential height field/horizontal wind field分类
天文与地球科学引用本文复制引用
陈超,蔡成瑶,吴弘智,桂永刚,李习瑾,胡萍..黔东北2021年9月异常高温成因分析[J].安徽农学通报,2026,32(9):106-109,4.
