Impact of urbanization on changes in temperature extremes in Beijing during 1978-2008

被引:42
作者
Wang Jun [1 ]
Yan ZhongWei [1 ]
Li Zhen [1 ]
Liu WeiDong [2 ]
Wang YingChun [2 ]
机构
[1] Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm Temperate East Asia, Beijing 100029, Peoples R China
[2] Beijing Meteorol Bur, Beijing 100089, Peoples R China
来源
CHINESE SCIENCE BULLETIN | 2013年 / 58卷 / 36期
基金
中国国家自然科学基金;
关键词
urbanization; temperature extreme; cluster analysis; nighttime light; URBAN HEAT-ISLAND; SURFACE AIR-TEMPERATURE; TIME-SERIES; CHINA; TRENDS; LAND;
D O I
10.1007/s11434-013-5976-y
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
To quantify the impact of urbanization on changes in observed surface air temperature and extremes, a homogenized dataset of daily mean, maximum and minimum temperature (T (m), T (max) and T (min)) observations at 20 stations in Greater Beijing (GBJ) from 1978 to 2008 is analyzed. In contrast with previous studies, a cluster analysis is done to objectively classify observing stations into four categories (urbanized, suburban, rural and mountain), which is checked with remote-sensing night-light images since the 1990s. At urbanized sites, there is an added warming trend in annual mean T (m) representing an average of 10.9% (up to 18.4% or 0.12A degrees C/decade at the most strongly influenced site) of overall warming. Corresponding contributions for T (min) are 12.7% (up to 20.8% or 0.19A degrees C/decade) and 24% for diurnal temperature range DTR (up to 37.4% or 0.149A degrees C/decade) over the last three decades. Although it has not had a significant impact on daytime records (T (max)), urbanization has enhanced the increasing (decreasing) trend of extremely warm (cold) nights by an average of 12.7% or 2.07 d/decade (29.0% or 5.06 d/decade) at the urbanized sites since the 1970s.
引用
收藏
页码:4679 / 4686
页数:8
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