基于气象站观测数据的京津冀城市扩展对气温变化的影响研究
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  • 英文篇名:Effects of Urban Expansion on Air Temperature Change based on Meteorological Stations Data in the Beijing-Tianjin-Hebei Region
  • 作者:徐新良 ; 张亚庆 ; 王世宽
  • 英文作者:XU Xinliang;ZHANG Yaqing;WANG Shikuan;State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences;University of Chinese Academy of Sciences;
  • 关键词:京津冀地区 ; 气象观测 ; 城市扩展 ; 城市扩展增温 ; 增温贡献率
  • 英文关键词:Beijing-Tianjin-Hebei region;;meteorological observation;;urban expansion;;urban expansion warming;;warming contribution rate
  • 中文刊名:DQXX
  • 英文刊名:Journal of Geo-information Science
  • 机构:中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室;中国科学院大学;
  • 出版日期:2019-07-25
  • 出版单位:地球信息科学学报
  • 年:2019
  • 期:v.21;No.143
  • 基金:中国科学院A类战略性先导科技专项(XDA20010302)~~
  • 语种:中文;
  • 页:DQXX201907011
  • 页数:11
  • CN:07
  • ISSN:11-5809/P
  • 分类号:108-118
摘要
城市扩展引起的区域增温效应一直都是城市热环境研究中的热门领域。本研究首先基于1980-2015年7期城市扩展遥感监测数据,通过熵值法构建了京津冀地区58个气象站周边2 km半径范围内城市扩展程度指数;然后使用四分位法对该指数进行分级,将站点划分为低度城市扩展(C1)、中度城市扩展(C2)和高度城市扩展站点(C3);最后通过3类站点年和季节平均气温变化趋势对比分析,揭示了城市扩展对气温变化的影响程度及其贡献率。结果表明:①1980-2015年京津冀地区几乎所有站点周边都有城市扩展现象,58个气象站周边城市扩展程度指数平均为0.377,C3类站点周边城市扩展程度指数为0.650;②3类站点年和季节平均气温增温速率均表现为C1         The warming effects caused by urban expansion have always been a hot topic in climate thermal research. Firstly, this study obtains the average proportion and expansion rate of urban-land area of 58 meteorological stations in Beijing-Tianjin-Hebei region within the radius of 2 km based on the 7 periods of remote sensing monitoring data of urban expansion from 1980 to 2015; builds expansion degree index of each meteorological station by entropy method. Then divide these meteorological stations into three types(these are lowly urban-expanded meteorological stations, moderately urban-expanded meteorological stations and highly urban-expanded meteorological stations) by quartering the expansion degree index of all stations. Finally, this study reveals the effects and its contributions of urban expansion through the comparative analysis of the annual and seasonal average temperature change trend of three types of meteorological stations. The results show that:(1) the surrounding of almost all meteorological stations has experienced urban expansion in Beijing-TianjinHebei region during 1980-2015, the average of urban expansion degree index of 58 meteorological stations is0.377, and the average of urban expansion degree index of C3 meteorological stations is 0.650;(2) the annual and seasonal average warming rates of three types of meteorological stations show as C1 < C2 < C3, and the annual average warming rate of C3 meteorological stations is 0.536℃/10 a; the seasonal average warming rate of C1, C2 and C3 meteorological stations are the highest in spring, and the seasonal average warming rate of C3 meteorological stations is 0.637 ℃/10 a, while the three types of meteorological stations have the lowest warming rate in summer or autumn;(3) The effects and its contribution rate of urban expansion on annual and seasonal mean warming rate of C3 meteorological stations are higher than that of C2 meteorological stations, the effects and its contribution rate of urban expansion on annual mean warming rate of C3 meteorological stations are0.342 ℃/10 a and 63.81% respectively; the effects of urban expansion on the seasonal average warming rate of C2 and C3 meteorological stations are the highest in winter, these are 0.229 ℃/10 a and 0.410 ℃/10 a respectively, while that of C2 and C3 meteorological stations are the lowest in spring or summer; the contribution rate of urban expansion on the seasonal average warming rate of C2 and C3 meteorological stations are the highest in autumn, these are 73.24% and 82.96% respectively, while that of C2 and C3 meteorological stations are the lowest in spring.
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