北京大学学报（自然科学版） ›› 2026, Vol. 62 ›› Issue (4): 769-780.DOI: 10.13209/j.0479-8023.2026.053

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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

梁倩1,2,3, 缪育聪1,2,†, 刘沛1,2   

  1. 1. 中国气象科学研究院 灾害天气科学与技术全国重点实验室, 北京 100081 2. 中国气象局大气化学重点开放实验室, 北京 100081 3. 中国能源建设集团广东火电工程有限公司, 广州 510735
  • 收稿日期:2025-05-21 修回日期:2026-03-02 出版日期:2026-07-20 发布日期:2026-07-20
  • 基金资助:
    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

Synoptic Classification of Compound Heat-Ozone Events in the Beijing-Tianjin-Hebei Region Using Self-Organizing Map

LIANG Qian1,2,3, MIAO Yucong1,2,†, LIU Pei1,2   

  1. 1. State Key Laboratory of Severe Weather Meteorological Science and Technology (LaSW), Chinese Academy of Meteorological Sciences, Beijing 100081 2. Key Laboratory of Atmospheric Chemistry of China Meteorological Administration, Beijing 100081 3. China Energy Engineering Group Guangdong Power Engineering Co., Ltd, Guangzhou 510735
  • Received:2025-05-21 Revised:2026-03-02 Online:2026-07-20 Published:2026-07-20

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摘要：

基于多源环境气象资料, 量化2022—2024年夏季京津冀及其周边地区的热指数以及地面臭氧浓度的时空特征, 发现高温与臭氧污染的复合事件频繁发生于河北南部山前平原。采用自组织映射方法, 对850 hPa天气形势场进行环流分型, 识别出两类典型环流形势与复合事件的高发显著相关。这些环流会在边界层顶部引发暖平流并抑制垂直混合, 同时引导南部暖湿气流在京津冀地区的半包围地形中积聚, 造成高热风险与污染的共同增强。研究结果揭示了区域大气环流与地形协同调控下高温与污染复合过程的边界层物理机制, 对加强复合气象灾害的预警与风险防控具有重要参考价值。

关键词: 热指数, 臭氧污染, 复合事件, 自组织映射, 边界层结构

Abstract:

Based on multi-source environmental and meteorological datasets, this study quantifies the spatiotemporal 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.

Key words: heat index, ozone pollution, compound events, self-organizing map, boundary layer structure

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