局地气候区与昼夜城市热岛效应的耦合关系研究  

Coupling between local climate zones and diurnal urban heat island effect

作　　者：高鹏[1] 刘桂馨 陈吉科 徐志刚[1,3] GAO Peng;LIU Guixin;CHEN Jike;XU Zhigang(School of Resource Engineering,Longyan University,Longyan 364012;School of Remote Sensing&Geomatics Engineering,Nanjing University of Information Science&Technology,Nanjing 210044;Key Laboratory for Satellite Mapping Technology and Applications of State Administration of Surveying,Mapping,and Geoinformation of China,Nanjing University,Nanjing 210023)

机构地区：[1]龙岩学院资源工程学院,龙岩364012 [2]南京信息工程大学遥感与测绘工程学院,南京210044 [3]南京大学卫星测绘技术与应用国家测绘地理信息局重点实验室,南京210023

出　　处：《南京信息工程大学学报（自然科学版）》2022年第3期267-276,共10页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：福建省科技计划引导性项目(2018Y0065,2021Y0038);2020年国家级大学生创新创业训练计划(202011312011);新罗区奇迈科技创新基金(XLQM004);上杭县奇迈科技创新基金(2020SHQM14)。

摘　　要：针对局地气候区框架下城市地表热环境昼夜差异研究的不足,本文基于机载LiDAR、IKONOS-2等多源遥感数据实现了局地气候区分类,重点分析了局地气候区与城市地表温度之间的响应关系及其昼夜差异.研究结果表明局地气候区类型地表温度存在显著的昼夜差异.在白天,大型低层建筑区LCZ 8地表温度最高,水体LCZ G地表温度最低.在夜间,裸土/沙土LCZ F为最冷的局地气候区,而水体LCZ G呈现了最高的地表温度.随建筑高度的升高,紧凑建筑类型区和开敞建筑类型区白天地表温度呈现下降的趋势,而夜间则表现出相反的规律.局地气候区类型的热属性在夜间(85.8%)比白天(79.5%)更容易区分.不论白天与夜间,开敞高层建筑区LCZ 4和水体LCZ G分别为建筑类型区和土地覆盖类型区中与其他局地气候区地表温度区分更明显的类型.Given that there is very limited knowledge about how urban thermal environment varies diurnally,we first classified Local Climate Zones(LCZs)based on multi-source remote sensing data such as airborne LiDAR and IKONOS-2,and then investigated the responses of LCZs to diurnal Land Surface Temperature(LST).The results suggested that there was significant diurnal variability in LST among LCZs.During the daytime,the warmest and coolest zones were large low-rise buildings(LCZ 8)and water(LCZ G),respectively.At night,bare soil or sand(LCZ F)obtained the lowest LST,while the warmest zone was water(LCZ G).With the increasing of building height,daytime LST related to compact and open built-up types tended to decrease,and an opposite trend was observed at night.LCZs were differentiated better at night than during daytime.Moreover,regardless of day and night,open high-rise built-type(LCZ 4)and LCZ G were the most differentiated zones for built-up and land cover types,respectively.

关 键 词：局地气候区 城市热岛 激光雷达 耦合关系 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置] TP701[自动化与计算机技术—控制科学与工程]