海洋气象学报2026，Vol.46Issue(4)：1-9,9.DOI:10.19513/j.cnki.hyqxxb.20260313002
2025年7月京津冀地区持续性高温成因:多因子协同作用
Synergistic effects of multiple factors driving the persistent heatwave in the Beijing-Tianjin-Hebei region in July 2025
摘要
Abstract
In July 2025,a rare prolonged and widespread high-temperature event occurred in the Beijing-Tianjin-Hebei region.This study systematically analyzes the spatiotemporal evolution characteristics of this persistent heatwave and reveals it's formation and maintenance mechanisms through the synergistic effects of large-scale atmospheric circulation,antecedent sea surface temperature(SST)anomaly forcing,and local radiative-convective conditions.The results are as follows.(1)During July 2025,the number of days with mean daily maximum temperature above the climatological mean in the Beijing-Tianjin-Hebei region reaches 27 d,with a maximum anomaly of the mean daily maximum temperature of up to 4.85℃.The spatial distributions of both high-temperature days and daily maximum temperature anomalies generally exhibit a pattern of"lower values in the northwest and higher values in the southeast".(2)This persistent heatwave is directly influenced by an anomalously northward and westward extension of the western North Pacific subtropical high.In the preceding month(June),the warm SST anomalies in key areas of western North Pacific provide a crucial external forcing condition for the anomalous maintenance of the western North Pacific subtropical high.Under the synergistic effects of oceanic and atmospheric conditions,the cloud cover over the Beijing-Tianjin-Hebei region is significantly reduced,and clear-sky radiation continuously intensifies,further strengthening the intensity and duration of the heatwave through a positive radiative-convective feedback mechanism.关键词
京津冀地区持续高温/大气环流系统/海温异常/辐射对流反馈/协同影响Key words
persistent heatwave in the Beijing-Tianjin-Hebei region/atmospheric circulation/sea surface temperature anomaly/radiative-convective feedback/synergistic effect分类
天文与地球科学引用本文复制引用
李莹,李焕连,王启光,林晓玉,郑月涵,冉欢欢..2025年7月京津冀地区持续性高温成因:多因子协同作用[J].海洋气象学报,2026,46(4):1-9,9.基金项目
国家自然科学基金气象联合基金项目(U2342211) （U2342211）
国家自然科学基金青年基金项目(42305018) （42305018）
中国气象局气象能力提升联合研究专项(22NLTSZ004) （22NLTSZ004）
中国气象局气象干部培训学院横向课题(SR-20250023) （SR-20250023）
