科研成果
  当前位置:首页 > 科研成果 > 论文
Surface Urban Heat Island Across 419 Global Big Cities
作者: S. S. Peng, S. L. Piao, P. Ciais, P. Friedlingstein, C. Ottle, F. M. Breon, H. J. Nan, L. M. Zhou and R. B. Myneni
期刊名称: Environmental Science & Technology
发表年度: 2012
卷: 46
期: 2
联系作者:
页码: 696-703
学科:
外单位作者单位 :
单位代码:
全文链接: http://dx.doi.org/10.1007/s11442-010-0109-x
论文全文:
第一作者所在部门:
论文出处:
论文类别:
参与作者:
其它备注:
摘要: Urban heat island is among the most evident aspects of human impacts on the earth system. Here we assess the diurnal and seasonal variation of surface urban heat island intensity (SUHII) defined as the surface temperature difference between urban area and suburban area measured from the MODIS. Differences in SUHII are analyzed across 419 global big cities, and we assess several potential biophysical and socio-economic driving factors. Across the big cities, we show that the average annual daytime SUHII (1.5 +/- 1.2 degrees C) is higher than the annual nighttime SUHII (1.1 +/- 0.5 degrees C) (P < 0.001). But no correlation is found between daytime and nighttime SUHII across big cities (P = 0.84), suggesting different driving mechanisms between day and night. The distribution of nighttime SUHII correlates positively with the difference in albedo and nighttime light between urban area and suburban area, while the distribution of daytime SUHII correlates negatively across cities with the difference of vegetation cover and activity between urban and suburban areas. Our results emphasize the key role of vegetation feedbacks in attenuating SUHII of big cities during the day, in particular during the growing season, further highlighting that increasing urban vegetation cover could be one effective way to mitigate the urban heat island effect.
论文链接                

版权所有:中国科学院青藏高原研究所 Copyright © 2003-
通讯地址:北京市朝阳区林萃路16号院3号楼 邮政编码:100101
京ICP备05002818-1号 京公网安备110402500031号