Aerosol Loading and Radiation Budget Perturbations in Densely Populated and Highly Polluted Indo-Gangetic Plain by COVID-19: Influences on Cloud Properties and Air Temperature
Aerosols emitted in densely populated and industrialized Indo-Gangetic Plain, one of the most polluted regions in the world, modulate regional climate, monsoon, and Himalayan glacier retreat. Thus, this region is important for understanding aerosol perturbations and their resulting impacts on atmosp...
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| Veröffentlicht in: | Geophysical research letters 2021-10, Vol.48 (20), p.e2021GL093796-n/a |
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| creator | Khatri, P Hayasaka, T Holben, B Tripathi, S N Misra, P Patra, P K Hayashida, S Dumka, U C |
| description | Aerosols emitted in densely populated and industrialized Indo-Gangetic Plain, one of the most polluted regions in the world, modulate regional climate, monsoon, and Himalayan glacier retreat. Thus, this region is important for understanding aerosol perturbations and their resulting impacts on atmospheric changes during COVID-19 lockdown period, a natural experimental condition created by the pandemic. By analyzing 5 years (2016–2020) data of aerosols and performing a radiative transfer calculation, we found that columnar and near-surface aerosol loadings decreased, leading to reductions in radiative cooling at the surface and top of the atmosphere and atmospheric warming during lockdown period. Further, satellite data analyses showed increases in cloud optical thickness and cloud-particle effective radius and decrease in lower tropospheric air temperature during lockdown period. These results indicate critical influences of COVID-19 lockdown on regional climate and water cycle over Indo-Gangetic Plain, emphasizing need for further studies from modeling perspectives. |
| doi_str_mv | 10.1029/2021GL093796 |
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Thus, this region is important for understanding aerosol perturbations and their resulting impacts on atmospheric changes during COVID-19 lockdown period, a natural experimental condition created by the pandemic. By analyzing 5 years (2016–2020) data of aerosols and performing a radiative transfer calculation, we found that columnar and near-surface aerosol loadings decreased, leading to reductions in radiative cooling at the surface and top of the atmosphere and atmospheric warming during lockdown period. Further, satellite data analyses showed increases in cloud optical thickness and cloud-particle effective radius and decrease in lower tropospheric air temperature during lockdown period. These results indicate critical influences of COVID-19 lockdown on regional climate and water cycle over Indo-Gangetic Plain, emphasizing need for further studies from modeling perspectives.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2021GL093796</identifier><identifier>PMID: 34924636</identifier><language>eng</language><publisher>Goddard Space Flight Center: Wiley</publisher><subject>aerosol ; Aerosols ; Aerosols and Particles ; air temperature ; Atmospheric Composition and Structure ; Atmospheric Science ; Biogeosciences ; cloud ; COVID‐19 ; Environment Pollution ; IGP ; Marine Pollution ; Megacities and Urban Environment ; Meteorology And Climatology ; Natural Hazards ; Oceanography: Biological and Chemical ; Oceanography: General ; Paleoceanography ; Pollution: Urban and Regional ; Pollution: Urban, Regional and Global ; radiation budget ; Radiation: Transmission and Scattering ; Research Letter ; The COVID‐19 pandemic: linking health, society and environment ; Urban Systems</subject><ispartof>Geophysical research letters, 2021-10, Vol.48 (20), p.e2021GL093796-n/a</ispartof><rights>Copyright Determination: MAY_INCLUDE_COPYRIGHT_MATERIAL</rights><rights>2021. 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Thus, this region is important for understanding aerosol perturbations and their resulting impacts on atmospheric changes during COVID-19 lockdown period, a natural experimental condition created by the pandemic. By analyzing 5 years (2016–2020) data of aerosols and performing a radiative transfer calculation, we found that columnar and near-surface aerosol loadings decreased, leading to reductions in radiative cooling at the surface and top of the atmosphere and atmospheric warming during lockdown period. Further, satellite data analyses showed increases in cloud optical thickness and cloud-particle effective radius and decrease in lower tropospheric air temperature during lockdown period. These results indicate critical influences of COVID-19 lockdown on regional climate and water cycle over Indo-Gangetic Plain, emphasizing need for further studies from modeling perspectives.</description><subject>aerosol</subject><subject>Aerosols</subject><subject>Aerosols and Particles</subject><subject>air temperature</subject><subject>Atmospheric Composition and Structure</subject><subject>Atmospheric Science</subject><subject>Biogeosciences</subject><subject>cloud</subject><subject>COVID‐19</subject><subject>Environment Pollution</subject><subject>IGP</subject><subject>Marine Pollution</subject><subject>Megacities and Urban Environment</subject><subject>Meteorology And Climatology</subject><subject>Natural Hazards</subject><subject>Oceanography: Biological and Chemical</subject><subject>Oceanography: General</subject><subject>Paleoceanography</subject><subject>Pollution: Urban and Regional</subject><subject>Pollution: Urban, Regional and Global</subject><subject>radiation budget</subject><subject>Radiation: Transmission and Scattering</subject><subject>Research Letter</subject><subject>The COVID‐19 pandemic: linking health, society and environment</subject><subject>Urban Systems</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>CYI</sourceid><recordid>eNp9Us1uEzEQthAVTQs3jgj5AVjqv_XGHJDSFNJIKzWqCteV1_amRo4drXdBeSpesZOEVu2Fk0fffD-jGSP0npLPlDB1wQiji5ooXin5Ck2oEqKYElK9RhNCFNSskqfoLOdfhBBOOH2DTrlQTEguJ-jvzPUpp4DrpK2Pa6yjxbdQ6sGniC9Hu3YDXrl-GPv2gGXsI75yMbuww6u0HYMenD3orv36_gCGMO6xZbSpWOgIFt7gVdCgbHd4fvNzeVVQ9QUIXRhdNC5jCJuHNFq86tMW4jxge8-Z7_Gd2wCkYQT3Fp10OmT37t97jn58_3Y3vy7qm8VyPqsLUwqmCkclpcaWXWW4EdQ4WnJRWsWZJK2iZko5Y1YYKakFCHbELVO2a1nJhGmn_Bx9Pfpux3bjrHFx6HVotr3f6H7XJO2bl53o75t1-t1MpaykYGDw6WhgYL-5d92TlpJmf7jm-eGA_vF53hP58VJAYEfCHx_c7r9mzeK2lpxKBaIPR1HUWTcwaN4TGXwEKTjnDy-rrJk</recordid><startdate>202110</startdate><enddate>202110</enddate><creator>Khatri, P</creator><creator>Hayasaka, T</creator><creator>Holben, B</creator><creator>Tripathi, S N</creator><creator>Misra, P</creator><creator>Patra, P K</creator><creator>Hayashida, S</creator><creator>Dumka, U C</creator><general>Wiley</general><general>John Wiley and Sons Inc</general><scope>CYE</scope><scope>CYI</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0002-9255-6377</orcidid><orcidid>https://orcid.org/0000-0001-7113-6480</orcidid><orcidid>https://orcid.org/0000-0002-6402-4680</orcidid><orcidid>https://orcid.org/0000-0001-5700-9389</orcidid><orcidid>https://orcid.org/0000-0002-0297-9801</orcidid><orcidid>https://orcid.org/0000-0003-0180-4900</orcidid></search><sort><creationdate>202110</creationdate><title>Aerosol Loading and Radiation Budget Perturbations in Densely Populated and Highly Polluted Indo-Gangetic Plain by COVID-19: Influences on Cloud Properties and Air Temperature</title><author>Khatri, P ; 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| subjects | aerosol Aerosols Aerosols and Particles air temperature Atmospheric Composition and Structure Atmospheric Science Biogeosciences cloud COVID‐19 Environment Pollution IGP Marine Pollution Megacities and Urban Environment Meteorology And Climatology Natural Hazards Oceanography: Biological and Chemical Oceanography: General Paleoceanography Pollution: Urban and Regional Pollution: Urban, Regional and Global radiation budget Radiation: Transmission and Scattering Research Letter The COVID‐19 pandemic: linking health, society and environment Urban Systems |
| title | Aerosol Loading and Radiation Budget Perturbations in Densely Populated and Highly Polluted Indo-Gangetic Plain by COVID-19: Influences on Cloud Properties and Air Temperature |
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