LAND-SURFACE TEMPERATURE
; COOL PAVEMENT MATERIAL
; SYNOPTIC CONDITIONS
; ENERGY SAVINGS
; TROPICAL CITY
; SENSED DATA
; HUMID CITY
; ENVI-MET
; COMFORT
; CLIMATE
WOS学科分类:
Environmental Sciences
WOS研究方向:
Environmental Sciences & Ecology
英文摘要:
Tropical cities are more susceptible to the suggested fall outs from projected global warming scenarios as they are located in the Torrid Zone and growing at rapid rates. Therefore, research on the mitigation of urban heat island (UHI) effects in tropical cities has attained much significance and increased immensely over recent years. The UHI mitigation strategies commonly used for temperate cities need to be examined in the tropical context since the mechanism of attaining a surface energy balance in the tropics is quite different from that in the mid-latitudes. The present paper evaluates the performance of four different mitigation strategies to counterbalance the impact of UHI phenomena for climate resilient adaptation in the Kolkata Metropolitan Area (KMA), India. This has been achieved by reproducing the study sites, selected from three different urban morphologies of open low-rise, compact low-rise and mid-rise residential areas, using ENVI-met V 4.0 and simulating the effects of different mitigation strategies-cool pavement, cool roof, added urban vegetation and cool city (a combination of the three former strategies), in reducing the UHI intensity. Simulation results show that at a diurnal scale during summer, the green city model performed best at neighborhood level to reduce air temperature (T-a) by 0.7 degrees C, 0.8 degrees C and 1.1 degrees C, whereas the cool city model was the most effective strategy to reduce physiologically equivalent temperature (PET) by 2.8 degrees -3.1 degrees C, 2.2 degrees -2.8 degrees C and 2.8 degrees - 2.9 degrees C in the mid-rise, compact low-rise and open low-rise residential areas, respectively. It was observed that (for all the built environment types) vegetation played the most significant role in determining surface energy balance in the study area, compared to cool roofs and cool pavements. This study also finds that irrespective of building environments, tropical cities are less sensitive to the selected strategies of UHI mitigation than their temperate counter parts, which can be attributed to the difference in magnitude of urbanness. (C) 2019 Elsevier B.V. All rights reserved.
1.Presidency Univ, Dept Geog, Kolkata, India 2.Lalbaba Coll, Dept Geog, Howrah, India 3.Vidyasagar Univ, Dept Geog & Environm Management, Midnapore, India 4.Haldia Govt Coll, Dept Geog, Haldia, India 5.Jadavpur Univ, Sch Oceanog Studies, Kolkata, India 6.Concordia Univ, Heat Isl Grp, Bldg Civil & Environm Engn, Montreal, PQ, Canada 7.Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki, Japan 8.Auburn Univ, Dept Geosci, Auburn, AL 36849 USA 9.Univ Liverpool, Dept Geog & Planning, Sch Environm Sci, Liverpool, Merseyside, England 10.Ctr Climate Res Singapore, Kim Chuan, Singapore 11.Xi An Jiao Tong Univ, Dept Architecture, Xian, Shaanxi, Peoples R China
Recommended Citation:
Chatterjee, Soumendu,Khan, Ansar,Dinda, Apurba,et al. Simulating micro-scale thermal interactions in different building environments for mitigating urban heat islands[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019-01-01,663:610-631