The impact of COVID-19 induced lockdown on the changes of air quality and land surface temperature in Kolkata city, India

Sahani, Nemai; Goswami, Sudipto Kumar; Saha, Arghya

doi:10.1007/s41324-020-00372-4

Cited by 20 publications

(10 citation statements)

References 45 publications

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“…Similar results were found in ground-based air temperature measurements which were also largely negative with the exception Mumbai. Similar reductions in LST during the pandemic have been found in Kolkata ( Bera et al, 2020 ; Sahani et al, 2020 ) and the Dwarka river basin (West Bengal province, Mandal and Pal et al, 2020 ) where average Landsat-derived LST decreases of between 0.2 and 5 °C have been reported and which attributed to reduction in atmospheric pollutants and aerosols. In their analysis of Landsat LST over a number of large cities in India during the pandemic, Nanda et al (2021) also found most exhibited a decreases in LST except Kolkata which saw in increase in surface temperature.…”

Section: Discussionsupporting

confidence: 75%

Improvement in air quality and its impact on land surface temperature in major urban areas across India during the first lockdown of the pandemic

Parida

Bar

Roberts

et al. 2021

Environmental Research

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Section: Discussionsupporting

confidence: 75%

Improvement in air quality and its impact on land surface temperature in major urban areas across India during the first lockdown of the pandemic

Parida

Bar

Roberts

et al. 2021

Environmental Research

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“…The negative nighttime LST anomalies during the lockdown weakened the UHI effect ( Founda et al, 2015 ; Gaffin et al, 2008 ; Sahani et al, 2020 ). This is justified by the larger reduction in LST (by about 1–2°C) that was found in the urban areas ( Fig.…”

Section: Discussionmentioning

confidence: 99%

Impact of COVID-19 induced lockdown on land surface temperature, aerosol, and urban heat in Europe and North America

Parida

Bar

Kaskaoutis

et al. 2021

Sustainable Cities and Society

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The outbreak of SARS CoV-2 (COVID-19) has posed a serious threat to human beings, society, and economic activities all over the world. Worldwide rigorous containment measures for limiting the spread of the virus have several beneficial environmental implications due to decreased anthropogenic emissions and air pollutants, which provide a unique opportunity to understand and quantify the human impact on atmospheric environment. In the present study, the associated changes in Land Surface Temperature (LST), aerosol, and atmospheric water vapor content were investigated over highly COVID-19 impacted areas, namely, Europe and North America. The key findings revealed a large-scale negative standardized LST anomaly during nighttime across Europe (–0.11°C to –2.6°C), USA (–0.70°C) and Canada (–0.27°C) in March–May of the pandemic year 2020 compared to the mean of 2015–2019, which can be partly ascribed to the lockdown effect. The reduced LST was corroborated with the negative anomaly of air temperature measured at meteorological stations (i.e. –0.46°C to –0.96°C). A larger decrease in nighttime LST was also seen in urban areas (by ∼1–2°C) compared to rural landscapes, which suggests a weakness of the urban heat island effect during the lockdown period due to large decrease in absorbing aerosols and air pollutants. On the contrary, daytime LST increased over most parts of Europe due to less attenuation of solar radiation by atmospheric aerosols. Synoptic meteorological variability and several surface-related factors may mask these changes and significantly affect the variations in LST, aerosols and water vapour content. The changes in LST may be a temporary phenomenon during the lockdown but provides an excellent opportunity to investigate the effects of various forcing controlling factors in urban microclimate and a strong evidence base for potential environmental benefits through urban planning and policy implementation.

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“…There are signi cant impacts that has been observed in the major megacity of the world. For example, the lockdown due to COVID-19 pandemic in the cities caused the pollution level of the city signi cantly improved (Sahani et al, 2020). As shown in Table 4, 17.8% of the participants stated that they have full lockdown.…”

Section: Descriptive Analysis Of Climate Change Impacts On Cities Liveabilitymentioning

confidence: 98%

Climate Change and Liveability of Cities: an Assessment of Possible Health Threats Associated With Increased Temperatures in Cities

Filho¹,

Tuladhar²,

Li³

et al. 2021

Preprint

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Climate change is associated with extreme weather events such as heat waves, droughts, floods, hurricanes, storms, and wildfires globally. Within cities, the impacts of climate change are quite conspicuous as the percentage of urban dwellers is expected to reach about 70% by 2050. As the planet warms up, temperatures in cities are likely to increase more than in rural areas. These dual challenges severely impact urban residents. This paper reports on a study on the impacts of climate change on the health and liveability of a set of 15 cities, in industrialised and developing countries from around the world. The assessment, based on the literature, examined the average temperature, maximum temperature and relative humidity of each city, and this data has been correlated with their liveability. It was complemented by a survey focused on residents of 109 cities from Africa, Asia, Europe, Latin America, North America Oceania. The findings show that developing countries seem to be especially struggling to adapt to the threats caused by increasing temperatures. Moreover, cities in industrialised countries are not immune to climate change impacts. The paper also outlines some mitigation and adaptation measures, which can be implemented to improve the liveability in cities and the well-being of their populations, and to make them more sustainable.

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The impact of COVID-19 induced lockdown on the changes of air quality and land surface temperature in Kolkata city, India

Cited by 20 publications

References 45 publications

Improvement in air quality and its impact on land surface temperature in major urban areas across India during the first lockdown of the pandemic

Improvement in air quality and its impact on land surface temperature in major urban areas across India during the first lockdown of the pandemic

Impact of COVID-19 induced lockdown on land surface temperature, aerosol, and urban heat in Europe and North America

Climate Change and Liveability of Cities: an Assessment of Possible Health Threats Associated With Increased Temperatures in Cities

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