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Science Features : OMI

 Ground-Level Ozone Smog Sensitive to Two Key Ingredients  Ground-Level Ozone Smog Sensitive to Two Key Ingredients
Satellite observations of Aura OMI formaldehyde and Nitrogen Dioxide to identify areas that would benefit more from reducing Nitrogen Oxide emissions versus reducing Volatile Organic Compound emissions.
A Decade of Changes in Nitrogen Oxides over U.S. Regions of Oil and Natural Gas  A Decade of Changes in Nitrogen Oxides over U.S. Regions of Oil and Natural Gas (ONG) Activity
This study shows the effect that shale oil and natural gas operations has had on tropospheric Nitrogen Dioxide levels in the Central Plains, and indicates the potential consequences for regional air quality.
Using Aura OMI data to map cancer risks from formaldehyde Using Aura OMI data to map cancer risks from formaldehyde
Formaldehyde is the top hazardous air pollutant of concern to EPA. It has a large natural atmospheric source from the oxidation of isoprene, a volatile organic compound emitted from trees, especially in the Southeast US.
The Nature of Ozone in Deep Convective Clouds  The Nature of Ozone in Deep Convective Clouds
Ozone within deep convective clouds is controlled by several factors involving photochemical reactions and transport. Gas-phase photochemical reactions and heterogeneous surface chemical reactions involving ice, water particles, and aerosols inside the clouds all contribute to the distribution and net production and loss of ozone.
 India Is Overtaking China as the World's Largest Emitter of Anthropogenic Sulfur Dioxide India Is Overtaking China as the World's Largest Emitter of Anthropogenic Sulfur Dioxide
Sulfate commonly makes up >10% of the fine particles in China and India, often much more during heavy pollution episodes. To predict and mitigate air pollution, air quality models require accurate information on the emissions of SO2 and other pollutants.
 Improvement in modeled tropospheric ozone Improvement in modeled tropospheric ozone
Tropospheric ozone is an important climate gas and an air pollutant. It plays a major role in tropospheric chemistry, such as serving as the main source for the hydroxyl radical, the atmosphere's primary oxidant.
science feature Decreasing Nitrogen Dioxide Levels
The Ozone Monitoring Instrument (OMI) animation of observations of decreasing nitrogen dioxide
science feature Long-Term Global Sulfur Dioxide Pollution Monitoring
From the Ozone Monitoring Instrument to the Ozone Mapping Profiler Suite : As Aura has entered the stage of extended mission and OMI has lost part of its spatial coverage due to instrument issues, it is critical to continue the global anthropogenic sulfur dioxide record with new instruments.
science feature New-generation OMI Volcanic Sulfur Dioxide Dataset and continuation with SNPP OMPS
As compared with the previous OMI data product, this new version significantly reduces retrieval bias for large volcanic eruptions and improves data quality for small degassing volcanoes.
science feature NASA Sulfur Dioxide Data Featured in New Volcanic Eruption Visualization
The Global Volcanism Program at the Smithsonian Institution National Museum of Natural History has created a new Eruptions, Earthquakes and Emissions web visualization using NASA volcanic sulfur dioxide data from multiple satellites.
science feature Study Estimates ~100,000 Premature Deaths from El Niño Fires in Equatorial Asia
GEOS-Chem adjoint study estimates ~100,000 premature deaths in Equatorial Asia due to severe, persistent smoke from the El Niño fires.
science feature Detection of missing sulfur dioxide sources
A new emission-source detection algorithm was applied to the measurements of sulfur dioxide from the Ozone Monitoring Instrument. It was used to compile the first global, satellite-based emissions inventory, and is completely independent of conventional information sources.
science feature Complex regional trends in two air pollutants
OMI instrument data shows nitrogen dioxide and sulfur dioxide changes over time.
science feature "Killer" Trees? Not Exactly
While some forests emit volatile organic compounds that are involved in ozone pollution, history shows attempts to control smog have a better chance of succeeding by focusing on vehicle emissions.

science featureOMI formaldehyde data product released
Formaldehyde (HCHO) in the atmosphere stems from pollution sources and biomass burning

science featureArctic Ozone in Spring
Though Earth's ozone layer has been depleted over the past four decades by chlorofluorocarbons (CFCs) and similar chemical compounds, the changes are expressed differently at the North and South Pole

science featureImages Highlight U.S. Air Quality Improvement
After ten years in orbit, the Ozone Monitoring Instrument (OMI) has been in orbit sufficiently long to show that people in major U.S. cities are breathing less nitrogen dioxide--a yellow-brown gas that can cause respiratory problems.

Ozone featureNew Algorithm Vastly Improves Measurements of SO2 Pollution from Space
Sulfur dioxide (SO2), emitted from both man-made and volcanic activities, significantly impact air quality and climate. Advanced sensors including the Ozone Monitoring Instrument (OMI) have been employed to measure SO2 pollution.

Ozone featureNASA Satellite Sees Increase of India's Sulfur Dioxide Emissions
The analysis of data captured by the Ozone Monitoring Instrument (OMI) found that emissions of sulfur dioxide from Indian power plants have increased by more than 60 percent between 2005 and 2012

Ozone featureHomogenizing Global Sulfur Dioxide Measurements from Multiple Satellite Sensors
Satellite mapping of sulfur dioxide (SO2) is useful to track volcanic and anthropogenic emissions in places where detailed SO2 emission information is not available.

OMI featureEnhancements in NO2 and SO2 over the Canadian oil sands
Data from the Ozone Monitoring Instrument (OMI) show distinct enhancements in nitrogen dioxide (NO2) and sulfur dioxide (SO2 ) over a region of surface mining in the Canadian oil sands.
OMI featureOMI sees BrO enhancements over the North Pole
OMI, with its wide swath, is the only instrument that can detect Bromine Monoxide (BrO) at the pole on every orbit. Here, stratospheric BrO has been carefully separated from the total column to produce estimates of the tropospheric BrO column.
 Direct observations of megacity emissions and lifetimes of nitrogen oxides using OMI
Emission inventories in megacities are uncertain, particularly in developing countries. Can we use OMI to better quantify these emissions without a model?
 Decrease in SO2 over the Eastern US
OMI data confirm a substantial reduction in sulfur dioxide (SO2 ) values around the largest US coal power plants as a result of the implementation of pollution control measures.
Global satellite analysis of the relation between aerosols and short-lived trace gasesGlobal satellite analysis of the relation between aerosols and short-lived trace gases
Information on the global composition of aerosol particles, their emission sources and relative regional pollution controls of combustion processes.
A-Train data for Merapi volcanic cloudA-Train data for Merapi volcanic cloud
Indonesia's Mount Merapi turned destructive, unleashing a series of eruptions.
Pollution episode over ChinaPollution episode over China
Aura observes a high-pressure weather system settled in over eastern China, in which air pollution began to accumulate locally for nearly a week.
OMI IcelandEyjafjallajskull volcano
Near-real-time OMI images of ash and sulfur dioxide from Icelandic eruption
reduction of Sulfur dioxide pollutionAura OMI observes reduction of Sulfur dioxide pollution over China
Chinese sulfur dioxide (SO2) emission controls were given a major strengthening in the 11th Five-Year-Plan.
Air Pollution ControlsAir Pollution Controls
Air Pollution Controls for Summer Surface Ozone as Deduced by OMI
OMI Fires Air Quality Changes Resulting from Emission Regulations
Regulations have resulted in reduced NOx emissions from major point sources over much of the Eastern US as shown by OMI's Continuous Emission Monitoring System data.
Aura and CALIPSOAura and CALIPSO
Combined use of A-train data for improved aerosol characterization
Aura and CloudSatAura and CloudSat
Combined use of A-train data for improved cloud study
South American biomass burningSouth American biomass burning
OMI observes large decrease of South American biomass burning in 2008
Nitrogen dioxide trendsNitrogen dioxide trends
OMI NO2 trends: 2007 - 2005 annual means
OMI Observes Impact from the Gulf HurricanesOMI Observes Impact from the Gulf Hurricanes
Hurricanes Katrina and Rita caused a significant reduction in nitrogen dioxide emissions.
Nitrogen dioxide in CaliforniaNitrogen Dioxide Observations in California
Aggressive air quality regulations of emission reductions show results in Aura's OMI imagery.
Sarychev Peak eruptionSarychev Peak Eruption
The eruption of Sarychev Peak (Kurile Islands) in mid-June 2009 produced a large stratospheric sulfur dioxide cloud that spread rapidly eastward in strong jet stream winds.
OMI FiresSmoke transported from the California station fire
Aerosol measurements from Aura's OMI instrument
OMI FiresSmoke transported from the California station fire
Aerosol measurements from Aura's OMI instrument
OMI NO2NO2 in the Troposphere
View collection of movies created from Aura's OMI instrument of NO2 in the troposphere.
Aura Science Result ImageFires In Southern California
NASA satellites continue to capture remarkable new images of the wildfires raging in Southern California. Aura's OMI images show the smoke aerosol layer generated by the fires in Southern California as it drifts over the Pacific Ocean.
OMI FiresSmoke transported from the California station fire
Aerosol measurements from Aura's OMI instrument
MODIS/OMI Fires in CaliforniaCalifornia fires as seen from MODIS and OMI
Smoke from the recent outbreak of fires in Southern California can clearly be seen via NASA satellites.
Aleutians Eruption
OMI captured the SO2 cloud in 2 consecutive orbits of the eruption in the Aleutians.
NO2 in mid AugAir Quality during the Olympics
Restrictions were put on traffic and power plants to improve air quality in Beijing during the Olympics. OMI makes daily measurements of the total column of SO2 and NO2.
Okmok eruption
Sulfur dioxide measurements from the Ozone Monitoring Instrument (OMI) on Aura permitted tracking of the eruption cloud in near real-time.
Springtime OMI Measurements of BrO
Despite its low atmospheric abundance, bromine monoxide (BrO) plays an important role in the chemistry of the atmosphere because it is a catalyst of the ozone destruction.

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Goddard Space Flight Center