Spatio-temporal changes ofanthropogenic heat release and its impact on land surface energy balanceover China
JIN Kai1, WANG Fei1,2,3, LIU Huan-huan4, GOU Jiao-jiao5, DING Wen-bin1
1. Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China; 2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China; 4. SuideNo.1 middle school, Suide 718099, China; 5. State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
Abstract:The spatio-temporal changes of anthropogenic heat flux (Qa) in 1980~2015 over China were investigated based on the statistical and gridded population data and the statistics of energy consumption. The surface net solar radiation (Rn) was used to describe the impact of Qa on land surface energy balance. The results showed that the national average Qa increased from 0.07W/m2 in 1980 to 0.45W/m2 in 2015, with an increasing trend of 0.11W/m2/10a(P<0.001). The national average Qa in 2015 accounted for 27% of the global radiative forcing resulting from anthropogenic CO2 emissions since the beginning of the industrial revolution. The sites with aQa more than 1.00W/m2 extended from spotted distribution to continuous areasfrom1990 to 2015, and its area accountedfor 10% of China's total area in 2015. Moreover, the changeof Rn was slightlyfaster than that of Qa, but not significantly (P=0.381). The mean Qa in urban areas of the 31provincial capital cities ranged from 1 to 32W/m2 and the mean intensity was up to17W/m2 in 2015. The ratio of mean Qa to mean Rn(149W/m2) of the 31capital cities on average was approximately12%. Except for Lhasa, the maximum pixel (0.5min×0.5min) value of Qa exceeded120W/m2 ineach city that implying the local energy balancehas already been changed substantially. We strongly suggested that anthropogenic heat release should be considered in the study of urban climate simulation, regional climate simulation and assessment, and making coping strategy about climate change for better strategy to slow down the warming trend.
金凯, 王飞, 刘欢欢, 苟娇娇, 丁文斌. 中国人为热变化及其对地表能量平衡的影响[J]. 中国环境科学, 2019, 39(3): 980-987.
JIN Kai, WANG Fei, LIU Huan-huan, GOU Jiao-jiao, DING Wen-bin. Spatio-temporal changes ofanthropogenic heat release and its impact on land surface energy balanceover China. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 980-987.
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