气候变化领域集成服务门户(CCPortal): Effectiveness of Urban Hydrological Processes in Mitigating Urban Heat Island and Human Thermal Stress During a Heat Wave Event in Nanjing, China

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DOI	10.1029/2020JD033275
	Effectiveness of Urban Hydrological Processes in Mitigating Urban Heat Island and Human Thermal Stress During a Heat Wave Event in Nanjing, China
	Wang X.; Liu H.; Miao S.; Wu Q.; Zhang N.; Qiao F.
发表日期	2020
ISSN	2169897X
卷号	125 期号:24
英文摘要	The effectiveness of urban hydrological processes in mitigating the urban heat island (UHI) effect and human thermal stress in the megacity of Nanjing during an extreme heat wave event (6th–10th August 2013) was assessed using Weather Research and Forecasting Single-Layer Urban Canopy Models. The inclusion of urban hydrological processes improved model performance, with more reasonable diurnal cycles and smaller mean errors, root mean square errors, and normalized root mean square errors for meteorological variables. Through evaporative cooling, urban hydrological processes can greatly increase specific and relative humidity, while reducing near-surface and surface temperatures, wind speed, and planetary boundary layer (PBL) height, and the cooling and wetting effects could affect the entire PBL, especially in low-intensity residential areas. Urban hydrological processes can effectively mitigate both the near-surface and surface UHI effect. The city-wide mitigation effectiveness of near-surface UHI ranged between 0.9°C and 1.1°C throughout the day, while the city-wide mitigation effectiveness of surface UHI at noon reached ∼5°C. The maximum reduction of near-surface and surface UHI in low-intensity residential areas reached 1.3°C and 10.0°C, respectively. Changes in heat stress indices indicate that the cooling effect improves human thermal comfort at night, while the increased humidity outweighs the cooling effect and exacerbates human thermal discomfort during daytime. The city-wide thermal stress increased by up to 0.4°C, 0.2°C, and 0.5°C during daytime and decreased by up to 0.4°C, 0.3°C, and 0.6°C at night for wet-bulb globe temperature, apparent temperature, and humidity index, respectively. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	heat waves; human thermal comfort; mitigation strategies; urban heat island; urban hydrological processes; WRF model
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185573
作者单位	School of Atmospheric Sciences, Nanjing University, Nanjing, China; Institute of Urban Meteorology, China Meteorological Administration, Beijing, China; Department of Atmospheric and Ocean Sciences, Fudan University, Shanghai, China; Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University, Shanghai, China; Institute of Eco-Chongming, Shanghai, China
推荐引用方式 GB/T 7714	Wang X.,Liu H.,Miao S.,et al. Effectiveness of Urban Hydrological Processes in Mitigating Urban Heat Island and Human Thermal Stress During a Heat Wave Event in Nanjing, China[J],2020,125(24).
APA	Wang X.,Liu H.,Miao S.,Wu Q.,Zhang N.,&Qiao F..(2020).Effectiveness of Urban Hydrological Processes in Mitigating Urban Heat Island and Human Thermal Stress During a Heat Wave Event in Nanjing, China.Journal of Geophysical Research: Atmospheres,125(24).
MLA	Wang X.,et al."Effectiveness of Urban Hydrological Processes in Mitigating Urban Heat Island and Human Thermal Stress During a Heat Wave Event in Nanjing, China".Journal of Geophysical Research: Atmospheres 125.24(2020).