Assessing the Influence of COVID-19 on the Shortwave Radiative Fluxes Over the East Asian Marginal Seas

Yi Ming; Pu Lin; Vaishali Naik; Fabien Paulot; Larry W. Horowitz; Paul A. Ginoux; V. Ramaswamy; Norman G. Loeb; Zhaoyi Shen; Clare E. Singer; Ryan X. Ward; Zhibo Zhang; Nicolas Bellouin

doi:10.1029/2020GL091699

Assessing the Influence of COVID-19 on the Shortwave Radiative Fluxes Over the East Asian Marginal Seas

Yi Ming, Pu Lin, Vaishali Naik, Fabien Paulot, Larry W. Horowitz, Paul A. Ginoux, V. Ramaswamy, Norman G. Loeb, Zhaoyi Shen, Clare E. Singer, Ryan X. Ward, Zhibo Zhang, Nicolas Bellouin

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Abstract

The Coronavirus Disease 2019 (COVID-19) pandemic led to a widespread reduction in aerosol emissions. Using satellite observations and climate model simulations, we study the underlying mechanisms of the large decreases in solar clear-sky reflection (3.8 W m⁻² or 7%) and aerosol optical depth (0.16 W m⁻² or 32%) observed over the East Asian Marginal Seas in March 2020. By separating the impacts from meteorology and emissions in the model simulations, we find that about one-third of the clear-sky anomalies can be attributed to pandemic-related emission reductions, and the rest to weather variability and long-term emission trends. The model is skillful at reproducing the observed interannual variations in solar all-sky reflection, but no COVID-19 signal is discerned. The current observational and modeling capabilities will be critical for monitoring, understanding, and predicting the radiative forcing and climate impacts of the ongoing crisis.

Original language	English (US)
Article number	e2020GL091699
Journal	Geophysical Research Letters
Volume	48
Issue number	3
DOIs	https://doi.org/10.1029/2020GL091699
State	Published - Feb 16 2021
Externally published	Yes

All Science Journal Classification (ASJC) codes

Geophysics
General Earth and Planetary Sciences

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Ming, Y., Lin, P., Naik, V., Paulot, F., Horowitz, L. W., Ginoux, P. A., Ramaswamy, V., Loeb, N. G., Shen, Z., Singer, C. E., Ward, R. X., Zhang, Z., & Bellouin, N. (2021). Assessing the Influence of COVID-19 on the Shortwave Radiative Fluxes Over the East Asian Marginal Seas. Geophysical Research Letters, 48(3), Article e2020GL091699. https://doi.org/10.1029/2020GL091699

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title = "Assessing the Influence of COVID-19 on the Shortwave Radiative Fluxes Over the East Asian Marginal Seas",

abstract = "The Coronavirus Disease 2019 (COVID-19) pandemic led to a widespread reduction in aerosol emissions. Using satellite observations and climate model simulations, we study the underlying mechanisms of the large decreases in solar clear-sky reflection (3.8 W m−2 or 7%) and aerosol optical depth (0.16 W m−2 or 32%) observed over the East Asian Marginal Seas in March 2020. By separating the impacts from meteorology and emissions in the model simulations, we find that about one-third of the clear-sky anomalies can be attributed to pandemic-related emission reductions, and the rest to weather variability and long-term emission trends. The model is skillful at reproducing the observed interannual variations in solar all-sky reflection, but no COVID-19 signal is discerned. The current observational and modeling capabilities will be critical for monitoring, understanding, and predicting the radiative forcing and climate impacts of the ongoing crisis.",

author = "Yi Ming and Pu Lin and Vaishali Naik and Fabien Paulot and Horowitz, {Larry W.} and Ginoux, {Paul A.} and V. Ramaswamy and Loeb, {Norman G.} and Zhaoyi Shen and Singer, {Clare E.} and Ward, {Ryan X.} and Zhibo Zhang and Nicolas Bellouin",

note = "Publisher Copyright: {\textcopyright} 2020. The Authors. This article has been contributed to by US Government employees and their work is in the public domain in the USA.",

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doi = "10.1029/2020GL091699",

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AU - Ming, Yi

AU - Lin, Pu

AU - Naik, Vaishali

AU - Paulot, Fabien

AU - Horowitz, Larry W.

AU - Ginoux, Paul A.

AU - Ramaswamy, V.

AU - Loeb, Norman G.

AU - Shen, Zhaoyi

AU - Singer, Clare E.

AU - Ward, Ryan X.

AU - Zhang, Zhibo

AU - Bellouin, Nicolas

PY - 2021/2/16

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AB - The Coronavirus Disease 2019 (COVID-19) pandemic led to a widespread reduction in aerosol emissions. Using satellite observations and climate model simulations, we study the underlying mechanisms of the large decreases in solar clear-sky reflection (3.8 W m−2 or 7%) and aerosol optical depth (0.16 W m−2 or 32%) observed over the East Asian Marginal Seas in March 2020. By separating the impacts from meteorology and emissions in the model simulations, we find that about one-third of the clear-sky anomalies can be attributed to pandemic-related emission reductions, and the rest to weather variability and long-term emission trends. The model is skillful at reproducing the observed interannual variations in solar all-sky reflection, but no COVID-19 signal is discerned. The current observational and modeling capabilities will be critical for monitoring, understanding, and predicting the radiative forcing and climate impacts of the ongoing crisis.

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Assessing the Influence of COVID-19 on the Shortwave Radiative Fluxes Over the East Asian Marginal Seas

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