Abstract
Urbanization effect on the observed changes of surface air temperature in Northeast China
Highlights
The global mean temperatures increased about 0.74°C during the last century, and the increasing greenhouse gas concentrations is widely considered as the primary reason (e.g., Karl et al 1993; Li et al 2010; Wang and Dickinson 2013)
Because the temperature difference between urban and rural stations was lager for Tmin than Tmax, long-term average diurnal temperature range (DTR) was smaller in urban stations (11.47°C) than that in rural stations (11.77°C)
This study analyzed the changes of temperatures and the effects of urbanization on temperature change in Northeast China
Summary
The global mean temperatures increased about 0.74°C during the last century, and the increasing greenhouse gas concentrations is widely considered as the primary reason (e.g., Karl et al 1993; Li et al 2010; Wang and Dickinson 2013). Wang et al (2012) found that the impacts of urbanization on temperatures in China were different under the solar dimming and brightening. During the solar dimming period, they found that Tmax in both urban and rural stations of China showed a weak decreasing trend, and Tmin in all stations showed significant warming trends. Different from the dimming period, Tmax increased faster in rural stations, and the Tmin showed a comparable increasing rate in urban and rural stations during the solar brightening period. By using the data of sunshine duration (SD), a good proxy for analyzing solar irradiance change, Shen et al (2014) found that solar radiation in China changed from dimming to a stable level after 1990. In order to further understand the urbanization effects on temperature in China, the influences of urbanization on temperature change during the different periods of solar radiation changes should be further investigated
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