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Pandemic Before and After: Los Angeles 2015-2019 versus 2020

May 15 - On March 19, California was one of the first states to set mandatory stay-at-home restrictions in an attempt to slow the spread of COVID-19. Arizona and Nevada followed suit around April 1. The Ozone Monitoring Instrument (OMI) on board NASA’s Aura satellite provide data that indicate that these restrictions have led to about a 31% decrease in Nitrogen Dioxide levels in the Los Angeles basin relative to previous years.

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Air quality, observations from space

Aura is a large contributer to this NASA web site which show how satellite data of air pollution may be used for health, air quality, and agricultural/food security applications.

Ozone Watch

View the latest status of the ozone layer over the Antarctic, with a focus on the ozone hole.

Global Nitrogen Dioxide

NEW! For scientists: Global OMI Nitrogen Dioxide Monitoring from NASA's Atmospheric Chemistry and Dynamics Laboratory


Science Highlights

Abrupt decline in tropospheric nitrogen dioxide over China after the outbreak of COVID-19 Abrupt decline in tropospheric nitrogen dioxide over China after the outbreak of COVID-19
Reductions in Sulfur Dioxide & Nitrogen Dioxide Air Pollution over South Asia Associated with Efforts to Control the Spread of COVID-19 Reductions in Sulfur Dioxide & Nitrogen Dioxide Air Pollution over South Asia Associated with Efforts to Control the Spread of COVID-19
New Generation Nitrogen Dioxide Standard Product New Generation Nitrogen Dioxide Standard Product
Solar Cycle Modulation of Nighttime Ozone Near the Mesopause Solar Cycle Modulation of Nighttime Ozone Near the Mesopause
Energetic particle precipitation and the quasi-biennial oscillation modulate Antarctic springtime stratospheric column Nitrogen Dioxide Energetic particle precipitation and the quasi-biennial oscillation modulate Antarctic springtime stratospheric column Nitrogen Dioxide
Impact of convectively lofted ice on the seasonal cycle of water vapor in the tropical tropopause layerImpact of Convectively Lofted Ice on the Seasonal Cycle of Water Vapor in the Tropical Tropopause Layer
Aura MLS measures record-low levels of Arctic ozone Aura MLS measures record-low levels of Arctic ozone

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