Surprising Changes in Aerosol Loading over India amid COVID-19 Lockdown

نویسندگان

چکیده

Using ground-based and satellite observation along with aerosol reanalysis products, we show a widespread reduction in loading over the Indian subcontinent during COVID-19 (COronaVIrus Disease 2019) lockdown. The pre-lockdown lockdown period considered present study is 20th February–20th March 2020 24th March–22nd April 2020. In terms of optical depth (AOD), has reduced up to 40% most populated region India. However, central part India shows an unexpected increase (~+20%) AOD. A simultaneous (decrease) mid-tropospheric relative humidity (wind speed (WS) at 850 hPa) by +85 ± 6.0% (–12 3.9%) occurred It found that on daily scale, mean AOD positively (negatively) correlated RH statistically significant linear correlation coefficient 0.53 (−0.43). An 20% (1 m s–1) was observed 0.10 (0.04). Thus, hypothesize lockdown, increased due atmospheric moisture coupled stagnant circulation condition.

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ژورنال

عنوان ژورنال: Aerosol and Air Quality Research

سال: 2021

ISSN: ['2071-1409', '1680-8584']

DOI: https://doi.org/10.4209/aaqr.2020.07.0466