Latest Science Features
Aura Ozone Monitoring Instrument Direct Observation of Changing Nitrogen oxide Lifetime in North American Cities
Inferred from Ozone Monitoring Instrument and World Wide Lightning Location Network (WWLLN) data
Over the last few years, a number of researchers have applied various techniques (e.g., land-use regression models) to create finer-scale Aura OMI NO2
data for use in research. Two recent studies are highlighted here.
Convective processes play a major role in controlling the abundances of cloud ice and water vapor in the tropical tropopause layer, which in turn strongly modulate climate.
Entrainment rate (λ) in convective parameterizations is one of the most sensitive, yet uncertain, parameters affecting climate sensitivity, clouds, precipitation, and trace gas distributions.
A recent study shows that the high humidity is due to both horizontal transport of air into colder regions, and slow ascent due to radiative heating, both of which lead to cloud formation.
Low temperatures in the 2015/16 winter lower stratosphere give rise to polar stratospheric cloud (PSC) formation, denitrification/dehydration, chlorine activation, and chemical ozone loss.
Climate studies rely on detailed knowledge of the total energy balance, in particular, on the spectral and temporal changes of solar flux. The Aura Ozone Monitoring Instrument is uniquely positioned to deliver the required long-term, stable, accurate ~daily solar data that span the entire solar cycle 24.
Using satellite observations of tropospheric Nitrogen Dioxide columns to infer long-term trends in US nitrogen oxide emissions.
Quantifying the natural sources variability in the troposphere and lower stratosphere is important for assessing and evaluating anthropogenic impacts on ozone, a trace gas that is important for climate, air quality, and atmospheric chemistry.
The conventional satellite-based remote sensing aerosol products provide distribution of aerosols in cloud-free regions leaving vast cloudy areas unmonitored in terms of the presence of aerosols.
The global meridional overturning of mass in the stratosphere, generally known as the Brewer-Dobson circulation (BDC), plays a crucial role in Earth’s climate system by controlling the distributions of atmospheric constituents.
Two major modes of climate variability that affect the stratospheric circulation, and consequently trace gas distributions, are the El Niño–Southern Oscillation (ENSO) and the Quasi-Biennial Oscillation (QBO).
Conclusive verification that stratospheric ozone destruction is lessening as expected in response to international controls on anthropogenic ozone-depleting substances (ODSs) enacted under the Montreal Protocol is one of today’s atmospheric science imperatives, but robust detection of such ozone “recovery” is complicated by large natural variability.
Changes in stratospheric ozone can induce, via atmospheric radiation balance, stratospheric circulation anomalies.
How well do a free-running and “nudged” chemistry climate model reproduce global timeseries of upper atmospheric composition (biases, variability, trends)?
This new product represents a novel application of existing satellite data and will help us better interpret contemporary trends in the budgets of methane (a potent greenhouse gas) and ozone (a major pollutant and oxidant source).
Gas flaring from Mexico’s offshore oil fields leads to economic loss and emissions of air pollutants and greenhouse gases, and there are global efforts to reduce gas flaring.
Introducing a new method using OMI observations to attribute decrease in acid deposition to SO2
OMI satellite measurements reveal for the first time many key features of ozone variability inside deep convective clouds
OMI satellite measurements identify increases in tropospheric ozone over Saudi Arabia/India/Southeast Asia and other global regions
A mosaic of satellite-derived and bottom-up emissions
The Ozone Monitoring Instrument (OMI) International Team, consisting of Dutch, Finnish and American scientists, was awarded the 2018 William T. Pecora Award by the USGS.
Satellites offer an unprecedented opportunity to evaluate patterns and trends in air pollution, especially in regions with few or no ground-based monitors.
In "Thriving on Our Changing Planet: A Decadal Strategy for Earth Observation from Space”, Aura data were presented as examples of satellite observations used as a global monitoring system for air quality & health and stratospheric ozone.
Next : 2018 Observations
Aura In the News
- Skin cancer is the most common form of cancer in the United States, taking thousands of lives every year. By the age of 70, one in five Americans will develop skin cancer. Now NASA is helping public health officials track the primary cause of the disease: overexposure to ultraviolet radiation.
- By measuring solar radiation reflected from Earth’s surface and scattered by its atmosphere, the OMI team derives important information about aerosols such as dust and smoke and pollutants like nitrogen and sulfur dioxide.
- The Ozone Monitoring Instrument (OMI) international team received the Pecora Award for its “sustained team innovation and international collaboration to produce daily global satellite data that revolutionized air quality, stratospheric chemistry, and climate research.”
- New Documentary Tells the Remarkable Story of How Scientists Discovered the Deadly Hole in the Ozone – and the Even More Remarkable Story of How the World’s Leaders Came Together to Fix It