杭州市高温热浪时期大气CO2浓度变化特征及解析

杨钟昊; 肖薇; 朱梦晶; 胡诚; 胡凝; 杨樱; 黄文晶; 单萌; 李旭辉

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (7) : 3634-3643.

大气污染与控制

杭州市高温热浪时期大气CO₂浓度变化特征及解析

杨钟昊¹, 肖薇¹, 朱梦晶², 胡诚³, 胡凝⁴, 杨樱¹, 黄文晶¹, 单萌², 李旭辉⁵

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The variation characteristics and analysis of atmospheric CO₂ concentration during heatwave in Hangzhou.

YANG Zhong-hao¹, XIAO Wei¹, ZHU Meng-jing², HU Chen³, HU Ning⁴, YANG Ying¹, HUANG Wen-jing¹, SHAN Meng², LEE Xu-hui⁵

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摘要

为明晰高温热浪时期城市大气CO₂浓度的变化特征及原因,基于WRF-STILT大气传输模型、EDGAR人为源排放清单和高精度激光光谱分析仪的观测数据结合贝叶斯优化反演算法对长三角典型城市——杭州大气CO₂进行研究.结果表明,高温热浪对大气CO₂浓度产生显著影响:高温热浪期间的日间大气CO₂浓度低于非高温热浪时期,而夜间的CO₂浓度高于非高温热浪时期;观测站点的空间代表性和CO₂排放变化是影响杭州市大气CO₂浓度的主要原因;高温热浪使得大气CO₂浓度观测站点空间代表性产生显著差异:高温热浪使得局地排放占80.5%,而非高温热浪时期仅占51.6%,高温热浪时期空间代表范围较小;高温热浪时期不同人为源部门的CO₂排放表现出显著差异:制造业部门,能源部门和炼油转化部门CO₂排放水平在高温热浪时提高,运输部门在高温热浪期间的CO₂排放水平则有所降低.

Abstract

To clarify the variation characteristics and causes of urban atmospheric CO₂ concentrations during heatwave periods, this study investigates Hangzhou—a typical city in the Yangtze River Delta—using the WRF-STILT atmospheric transport model, the EDGAR anthropogenic emission inventory, high-precision laser spectrometer observations, and a Bayesian optimization inversion algorithm. Results show that heatwaves significantly affect atmospheric CO₂ concentrations: daytime concentrations are lower, while nighttimeconcentrations are higher compared to non-heatwave periods. The spatial representativeness of measurement sites and changes in CO₂ emissions are the main factors influencing atmospheric CO₂ levels in Hangzhou. Heatwaves also lead to notable changes in spatial representativeness: during heatwaves, local emissions account for 80.5% of the observed CO₂ compared to only 51.6% during non-heatwave periods, and representative spatial range is smaller. In addition, CO₂ emissions from various anthropogenic sectors respond differently to heatwaves: emission from the manufacturing, energy, and refining and conversion sectors increase, while emissions from transportation decreases.

导出引用

杨钟昊, 肖薇, 朱梦晶, 胡诚, 胡凝, 杨樱, 黄文晶, 单萌, 李旭辉. 杭州市高温热浪时期大气CO₂浓度变化特征及解析[J]. 中国环境科学. 2025, 45(7): 3634-3643

YANG Zhong-hao, XIAO Wei, ZHU Meng-jing, HU Chen, HU Ning, YANG Ying, HUANG Wen-jing, SHAN Meng, LEE Xu-hui. The variation characteristics and analysis of atmospheric CO₂ concentration during heatwave in Hangzhou.[J]. China Environmental Science. 2025, 45(7): 3634-3643

中图分类号： X511

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基金

江苏省杰出青年基金项目(BK20220055);江苏省“333人才”领军型人才团队(BRA2022023);国家自然科学基金项目(U24A20590,42005143);浙江临安大气成分本底国家野外科学观测研究站开放研究课题(LAZD202503);中国气象局生态系统碳源汇重点开放实验室(ECSS-CMA202302)