北京大学学报（自然科学版）2026，Vol.62Issue(4)：769-780,12.DOI:10.13209/j.0479-8023.2026.053
基于自组织映射方法的京津冀高温与臭氧污染复合过程的环流分型研究
Synoptic Classification of Compound Heat-Ozone Events in the Beijing-Tianjin-Hebei Region Using Self-Organizing Map
摘要
Abstract
Based on multi-source environmental and meteorological datasets,this study quantifies the spatiotem-poral characteristics of the heat index and surface ozone concentrations during the summers of 2022-2024 across the Beijing-Tianjin-Hebei(BTH)region and its surroundings.Results show that compound heat-O3 events frequently occur over the piedmont plains of southern Hebei.Using a self-organizing map(SOM)method to classify 850 hPa synoptic patterns,two typical circulation types are identified as being strongly associated with these compound events.These patterns induce warm advection near the top of the planetary boundary layer and suppress vertical mixing,while simultaneously directing warm and humid air from the south to accumulate within the semi-enclosed topography of the BTH region.This leads to enhanced heat risk and pollution levels.The study reveals key planetary boundary layer processes governed by the joint modulation of regional atmospheric circulation and terrain,offering valuable insights for improving early warning and risk mitigation of compound meteorological hazards.关键词
热指数/臭氧污染/复合事件/自组织映射/边界层结构Key words
heat index/ozone pollution/compound events/self-organizing map/boundary layer structure引用本文复制引用
梁倩,缪育聪,刘沛..基于自组织映射方法的京津冀高温与臭氧污染复合过程的环流分型研究[J].北京大学学报（自然科学版）,2026,62(4):769-780,12.基金项目
国家自然科学基金(42322504,42275198)和中国气象科学研究院科技发展基金(2025KJ002)资助 （42322504,42275198）
