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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

Aura's Ozone Monitoring Instrument (OMI) used in evaluating the reduction of nitrogen dioxide tropospheric vertical column densities before and after the Lunar New Year.

  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

As a consequence of the nationwide stay-at-home order, less fossil fuels are being consumed and, subsequently, less air pollution is being emitted in India and also in neighboring countries, including Pakistan, Nepal, Bangladesh, and Sri Lanka.

New Generation Nitrogen Dioxide Standard Product New Generation Nitrogen Dioxide Standard Product

The NASA standard nitrogen dioxide version 4.0 product for Aura's Ozone Monitoring Instrument (OMI) incorporates the most salient improvements and enhances the data quality.

Solar Cycle Modulation of Nighttime Ozone Near the Mesopause  Solar Cycle Modulation of Nighttime Ozone Near the Mesopause

What do long-term observations of ozone profiles from the Microwave Limb Sounder (MLS) aboard the Aura satellite tell us about the drivers of O3 variations near 90 km altitude (the secondary ozone maximum region), notably in relation to the 11-year solar cycle?

 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

Aura Microwave Limb Sounder (MLS) measurements have previously shown that the easterly phase of the QBO is associated with increases in nitrogen in the Antarctic stratosphere.

 Impact of convectively lofted ice on the seasonal cycle of water vapor in the tropical tropopause layer Impact of Convectively Lofted Ice on the Seasonal Cycle of Water Vapor in the Tropical Tropopause Layer

Aura's MLS observes patterns of stratospheric humidity in the “Tropical Tropopause Layer” .

Aura MLS measures record-low levels of Arctic ozone Aura MLS measures record-low levels of Arctic ozone

Aura's MLS observations of Arctic vortex-average chlorine monoxide improve the understanding of stratospheric ozone trends and their uncertainties

 New Nitrogen Dioxide Web-based Monitoring System to Facilitate Scientific ResearchNew Nitrogen Dioxide Web-based Monitoring System to Facilitate Scientific Research

To facilitate scientific research using Aura's OMI nitrogen dioxide data, the team at developed a web-based monitoring system that shows time series for over 200 world cities and animated maps for larger regions.

 Reductions in Nitrogen Dioxide Air Pollution Presumably Associated with Reductions in Fossil Fuel Use Reductions in Nitrogen Dioxide Air Pollution Presumably Associated with Reductions in Fossil Fuel Use

The Northeast US has seen significant reductions in air pollution over its major metropolitan areas as communities grapple with widespread lockdowns and shelter-in-place orders as a result of 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 Reductions in Sulfur Dioxide & Nitrogen Dioxide Air Pollution over South Asia Associated with Efforts to Control the Spread of COVID-19

Aura's OMI data over South Asia show the means of the period in previous years, while the comparing to the means for 2020, showing a vast improvement after the nationwide stay-at-home order for India’s 1.3 billion citizens.

 A Methodology To Constrain Carbon Dioxide Emissions From Coal-fired Power Plants Using Observations Of Co-emitted Nitrogen Dioxide A Methodology To Constrain Carbon Dioxide Emissions From Coal-fired Power Plants Using Observations Of Co-emitted Nitrogen Dioxide

Satellite-derived emission estimates are based on NO2 measurements from the Aura Ozone Monitoring Instrument (OMI).

The Efficiency of transport into the stratosphere via the Asian and North American summer monsoon circulationsThe Efficiency of transport into the stratosphere via the Asian and North American summer monsoon circulations

This study confirms the important role of monsoon regions in moistening the lower stratosphere in boreal summer using data collected from Aura's Microwave Limb Sounder (MLS) .

Ceramic industry at Morbi as a large source of sulfur dioxide pollution in India Ceramic industry at Morbi as a large source of sulfur dioxide pollution in India

Observations from the Ozone Monitoring Instrument (OMI), onboard the NASA’s Earth Observing System (EOS) Aura satellite, reveal a large Sulfur dioxide pollution

Vortex-wide detection of large polar stratospheric cloud particles in the Arctic winter stratosphereVortex-wide detection of large polar stratospheric cloud particles in the Arctic winter stratosphere

Depletion of gas-phase nitric acid observed by Aura's Microwave Limb Sounder (MLS)

In the News

Pandemic Before and After: Los Angeles 2015-2019 versus 2020
05.15.2020 - 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.

Pandemic Before and After: South Asia: 2017-2019 versus 2020
05.07.2020 - On March 24, 2020, Prime Minister Modi ordered a nationwide stay-at-home order for India’s 1.3 billion citizens in an attempt to slow the spread of COVID-19. As a consequence, less fossil fuels are being consumed and, subsequently, less air pollution is being emitted in India and also in neighboring countries, including Pakistan, Nepal, Bangladesh, and Sri Lanka.

Reductions in Nitrogen Dioxide Associated with Decreased Fossil Fuel Use Resulting from COVID-19 Mitigation
04.28.2020 - Over the past several weeks, the Northeast United States has seen significant reductions in air pollution over its major metropolitan areas. Similar reductions in air pollution have been observed in other regions of the world.

NASA Satellite Data Show 30 Percent Drop In Air Pollution Over Northeast U.S.
04.09.2020 - Over the past several weeks, NASA satellite measurements have revealed significant reductions in air pollution over the major metropolitan areas of the Northeast United States. Similar reductions have been observed in other regions of the world. These recent improvements in air quality have come at a high cost, as communities grapple with widespread lockdowns and shelter-in-place orders as a result of the spread of COVID-19.

Airborne Nitrogen Dioxide Plummets Over China
03.02.2020 - NO2 amounts have dropped with the coronavirus quarantine, Chinese New Year, and a related economic slowdown.