郊区DTR与最大城市热岛强度的关系研究  

Study on the Relationship between Suburban DTR and the Maximum Urban Heat Island Intensity

作　　者：李楠[1] 陈光 贺敏杰 赵立华[3] 蔡云楠[1] LI Nan;CHEN Guang;HE Minjie;ZHAO Lihua;CAI Yunnan(Guangdong University of Technology,Guangzhou 510910,China;Guangdong University of Technology,State Key Laboratory of Subtropical Building Science,Guangzhou 510910;South China University of Technology,Guangzhou 510641,China)

机构地区：[1]广东工业大学,广州510910 [2]广东工业大学,亚热带建筑科学国家重点实验室,广州510910 [3]华南理工大学,亚热带建筑科学国家重点实验室,广州510641

出　　处：《建筑科学》2021年第8期110-115,138,共7页Building Science

基　　金：国家自然科学基金青年基金“城镇化背景下湿热地区城市热环境模拟与预测方法研究”(51708129);国家自然科学面上项目“基于风热环境优化的湿热地区城市设计体系与评价方法研究”(51978173);亚热带建筑科学国家重点实验室开放课题“气候变化背景下不同城市扩张情景的城市热环境模拟和预测方法研究”(2018B19)。

摘　　要：气象条件对城市热岛(UHI)的发展有重要影响,对UHI深入评估分析需要选择适当的观测和分析日。研究以广州地区近1 a的观测资料为基础,探讨郊区温度日较差(diurnal temperature range,DTR)与最大城市热岛强度(UHIImax)的关系,结果表明:1)在选取的160个样本气象日中,广州的两个城市区域的UHIImax的平均值分别为2.65℃和3.00℃,高频发生在夜间;秋、冬季节高于春、夏季节;2)郊区DTR的差异为1.67~13.89℃之间,郊区DTR与UHIImax有明显的相关性(r>0.60,P <0.001);3)通过郊区DTR和UHIImax分布分析,初步提出DTR≥9℃为识别适合广州UHI发展的气象条件的阈值。通过DTR和UHIImax关系的研究,为识别适合UHI发展的气象日筛选提供了初步的方法和条件。Meteorological conditions have an important influence on the development of urban heat islands (UHI)and the in-depth evaluation and analysis of UHI require the selection of proper days for observation and analysis.Based on the observation data of Guangzhou in the past year,this paper explored the relationship between the diurnal temperature range (DTR) in the suburban area and the daily maximum urban heat island intensity (UHIImax). The results show that: 1) Among the 160 sample meteorological days selected,the average value of UHIImaxin the two urban areas were 2.65 ℃ and 3.00 ℃ respectively,and mostly happened at night;the frequency in autumn and winter were higher than spring and summer. 2) The suburban DTR ranged from 1.67 to 13.89 ℃. The correlations between DTR and UHIImaxwere significant (r > 0.60,P < 0.001). 3) This paper initially proposed that DTR ≥9 ℃ should be the appropriate threshold for identifying meteorological conditions conducive to UHI development in Guangzhou based on the analysis of DTR and UHIImax. The study on the relationship between DTR and the daily UHIImaxprovides preliminary methods and conditions for identifying meteorological day screening suitable for UHI development.

关 键 词：最大城市热岛强度 郊区DTR 相关性 阈值 

分 类 号：TU119[建筑科学—建筑理论]