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Analyzing the impact of COVID-19 induced lockdown on thermal stress and comfort level of 17 major cities of India (2019–2020)
Human and Ecological Risk Assessment ( IF 4.3 ) Pub Date : 2021-08-09 , DOI: 10.1080/10807039.2021.1962242
Rituraj Neog 1
Affiliation  

Abstract

The objective of the study is to evaluate the level of thermal stress/comfort experienced by 17 major cities of India during lockdown period (2020) and its comparison with the year 2019. The experiment incorporates daily air temperature and relative humidity data for a period of 6 months accessed from power.larc.nasa.gov. The thermal condition of the cities has been computed with thermo-hygrometric index (THI) and Relative Strain Index (RSI). Almost all cities portray decreasing air temperature with ascending relative humidity from the year 2019 to 2020. Changing air temperature with relative humidity modified the thermal condition of the cities. Most of the cities experienced increasing number of bio-climatic comfortable days in 2020 such as in Kolkata, Bangalore, Lucknow, Patna, Hyderabad, Delhi, Jodhpur, Bikaner, and Chandigarh. And on the contrary descending number of Torrid and Heat stroke risk days notably over Kolkata, Ahmadabad, Nagpur, Bhopal, Patna, and Lucknow. Overall, there is a sharp decline in the number of days with torrid climate in cities from 1386 to 1037 (based on THI) and risk of heat stroke from 200 to 103 (based on RSI) from the year 2019 to 2020. Further, the cities also experienced growing number of bio-climatic comfortable days (based on RSI) from 530 to 621. The decreasing trend of thermal stress over the cities has considerably reduced the vulnerable population to extreme urban climate.



中文翻译:

分析 COVID-19 导致的封锁对印度 17 个主要城市的热应力和舒适度的影响(2019-2020)

摘要

该研究的目的是评估印度 17 个主要城市在封锁期间(2020 年)所经历的热应激/舒适程度,并与 2019 年进行比较。该实验结合了一段时间内的每日气温和相对湿度数据。从 power.larc.nasa.gov 访问 6 个月。城市的热条件已经用温湿度指数(THI)和相对应变指数(RSI)计算出来。从 2019 年到 2020 年,几乎所有城市的气温都随着相对湿度的升高而降低。气温随相对湿度的变化改变了城市的热状况。大多数城市在 2020 年经历了越来越多的生物气候舒适天数,例如加尔各答、班加罗尔、勒克瑙、巴特那、海得拉巴、德里、焦特布尔、比卡内尔和昌迪加尔。相反,在加尔各答、艾哈迈达巴德、那格浦尔、博帕尔、巴特那和勒克瑙,高温和中暑风险天数呈下降趋势。总体而言,2019 年至 2020 年,城市气候炎热天数从 1386 天到 1037 天(基于 THI)和中暑风险从 200 天到 103 天(基于 RSI)急剧下降。城市也经历了越来越多的生物气候舒适天数(基于 RSI),从 530 天增加到 621 天。城市热应力的下降趋势大大减少了脆弱人群对极端城市气候的影响。

更新日期:2021-09-12
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