Assessing the spatiotemporal characteristics of anthropogenic heat in Beijing
WANG Ye-ning1,2, CHEN Ting-ting1,3, SUN Ran-hao1
1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. School of Life Sciences, University of Science and Technology of China, Hefei 230022, China
Anthropogenic heat (AH) emission in Beijing was investigated using the inventory approach. We assessed the total amount of heat emissions and their spatiotemporal characteristics. Results showed that: the total amount of AH emissions in the main zones was 1.11′1018J/a, accounting for 8.1% of the amount of solar radiation. Building sector contributed to 45.3% of heat emissions, followed by transportation and industrial sectors in the proportion of 30.1%, 20.2%, respectively. The largest amounts of AH emission were located in Chaoyang and Haidian district, accounting for 52.2% of the main zones. The least amount of AH emission was located in Dongcheng and Daxing district (7.7%). The average AH flux of the main zones was 14.55W/m2, a maximum (82.30W/m2) in Xicheng and only 2.61W/m2 in Daxing. High values of AH flux (60~100W/m2) were concentrated between the northern 4th ring-road and 2nd ring-road. The highest AH intensity (272~376W/m2) was located in CBD of Beijing. The positive correlation between the AH fluxes and land surface temperature was quantified to reveal the impact of AH in Beijing. We found that there had no significant variations in monthly transportation AH and the diurnal peaks of transportation AH were at 9:00 and 18:00. The AH of building sectors varied in different seasons and different times, exhibiting the ‘double peak' in a day.
王业宁, 陈婷婷, 孙然好. 北京主城区人为热排放的时空特征研究[J]. 中国环境科学, 2016, 36(7): 2178-2185.
WANG Ye-ning, CHEN Ting-ting, SUN Ran-hao. Assessing the spatiotemporal characteristics of anthropogenic heat in Beijing. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(7): 2178-2185.
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