北京师范大学学报（自然科学版）2017，Vol.53Issue(4)：443-450,8.DOI:10.16360/j.cnki.jbnuns.2017.04.012
北京地区城市化对辐射强迫的影响估算
Influence of urbanization on radiative forcing in Beijing
摘要
Abstract
Different forcing factors in urban areas contribute to the radiative forcing values.In the present work,GLASS albedo and CERES surface shortwave radiation data were used to calculate the surface radiative forcing due to changes in the surface albedo over the past 10 years in Beijing.Spatial distribution of radiative forcing and statistical characteristics were investigated.Urban fringe area was extracted from Globeland30 Land Use and Land Cover Change data.Combination with calculated radiative forcing of remote sensing data enabled extraction of radiative forcing values for urban district,inner zone and all levels in the outer edge region.Relationship between land cover change driving factors and climate-driving factors was explored.It has been found that over the past ten years,the radiative forcing in the whole of Beijing region was 2.52 W·m-2,leading to a temperature increase.The average value of radiative forcing in land cover-unchanged region was found to be 2.26 W·m-2,accounting for 89％ of all the radiative forcing in the whole region.Of such changes,cultivated land and woodland were the two major radiative forcing sources.The average value of radiative forcing in land-cover-changed region was found to be 0.26 W· m 2.The non-vegetation land cover change contributed 0.09 W·m-2,while vegetation-including-land-cover change generated radiative forcing of 0.18 W·m-2.In the city core area,radiation forcing was found to be-1.16 W·m-2,exhibiting as a cooling effect.The radiative forcing change was correlated to the distance away from urban district,first increasing and then decreasing from inside to outside.The present work provides a typical study of radiation forcing in urban areas,and data obtained would be helpful to understand differences in regional climate in Beijing.关键词
反照率/辐射强迫/土地覆被变化/城市化Key words
albedo/radiative forcing/land cover change/urbanization分类
信息技术与安全科学引用本文复制引用
唐荣云,赵祥,唐碧剑,魏红,陈嘉,彭义峰..北京地区城市化对辐射强迫的影响估算[J].北京师范大学学报（自然科学版）,2017,53(4):443-450,8.基金项目
测绘地理信息公益性行业科研专项经费资助项目(201512028) （201512028）
