气象科学2026，Vol.46Issue(3)：221-232,12.DOI:10.12306/2025jms.0032
城市内部湿热的变化特征及其影响因子研究
Intra-city variations in humid heat and its influencing factors
摘要
Abstract
Because of high heterogeneous of cities,studying the intra-city thermal environment difference is of great importance for the deep understanding of urban residents' thermal comfort and making heat stress mitigation measures.This study conducted four-season microclimate mobile observation experiments in Lanzhou,a semi-arid city,to get wet-bulb temperature data and further analyzed the spatio-temporal distribution characteristics of humid heat and investigated the synergistic relationship between temperature and humidity and their contribution to wet-bulb temperature.It also explored the impact of underlying surface types,urban morphological characteristics,and human activities on humid heat using multi-source data.The main conclusions are as follows:(1)there are significant diurnal variations in the spatial distribution of humid heat in Lanzhou,but seasonal differences are not significant.(2)In the daytime,the wet-bulb temperature is more likely to be higher than that at night,mainly due to the synergistic effect of temperature and humidity during the daytime.(3)Shading by buildings effectively reduces urban humid heat in the daytime,while urban green spaces at night can significantly alleviate humid heat.(4)Given the notable diurnal variations in the ability of urban green spaces to mitigate humid heat under typical weather conditions,future studies should consider the potential effects of green spaces on wet-bulb temperature during heatwaves,especially when they are constrained by moisture stress and other adverse conditions.关键词
湿球温度/半干旱区/地表温度/城市指标/人为热Key words
wet-bulb temperature/semi-arid zone/land surface temperature/urban form/anthropogenic heat分类
天文与地球科学引用本文复制引用
夏伟,曹畅,冯腾琦,徐家平,陈燕..城市内部湿热的变化特征及其影响因子研究[J].气象科学,2026,46(3):221-232,12.基金项目
中国气象局生态系统碳源汇重点开放实验室重点资助项目(ECSS-CMA202302) （ECSS-CMA202302）
国家自然科学基金资助项目(42005143) （42005143）
金坛观象台数据平台资助项目 （）
