NASA's Aura satellite measures pollution 'butterfly' from fires in central Africa
Fires raging in central Africa are generating a high amount of pollution that is showing up in data from NASA's Aura Satellite, with the ominous shape of a dark red butterfly in the skies over southern part of the Democratic Republic of the Congo and northern Angola. An image of the pollution from agricultural fires in central Africa was created from data of nitrogen dioxide (NO2) levels over the period from July 7 to 12, 2011. It was created from Ozone Measuring Instrument (OMI) data using the NASA Giovanni system by Dr. James Acker at NASA's Goddard Space Flight Center in Greenbelt, Md.
Each year, people in the region burn croplands to clear fields after harvests. Burning is also used to create new growth in pastures and move grazing animals to new locations.
NO2 forms during fires when nitrogen reacts with oxygen. In fact, NO2 is formed in any combustion process where the oxygen is provided by Earth's atmosphere.
Detection of NO2 is important because it reacts with sunlight to create low-level ozone or smog and poor air quality. The OMI instrument that flies aboard NASA's Aura satellite is able to detect NO2. Low-level ozone (smog) is hazardous to the health of both plants and animals, and ozone in association with particulate matter causes respiratory problems in humans.
OMI measures NO2 by the number of molecules in a cubic centimeter. The highest concentrations appear in dark red and are coming from extreme northern Angola and south central part of the Democratic Republic of the Congo. The high concentration coming from the DRC appears to look like a butterfly.
OMI data is archived at the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC), and is provided by KNMI, the Koninklijk Nederlands Meteorologisch Instituut (Royal Netherlands Meteorological Institute). Dr. P.F. Levelt is the Principal Investigator of OMI, Dr. J. Tamminen is the Finnish Co-PI, and Dr. P.K. Bhartia leads the U.S. OMI science team. Dr. James Gleason (NASA) and Pepijn Veefkind (KNMI) are PIs of the OMI NO2 product.
Source: NASA/Goddard Space Flight Center
- NASA's Aura satellite measures pollution 'Butterfly' from fires in Central Africafrom Science DailyFri, 15 Jul 2011, 17:30:29 EDT
- NASA's Aura satellite measures pollution 'butterfly' from fires in central Africafrom PhysorgFri, 15 Jul 2011, 17:00:36 EDT
- Fires in central Africa cause pollution 'butterfly'from Science DailyFri, 15 Jul 2011, 16:30:46 EDT
Latest Science NewsletterGet the latest and most popular science news articles of the week in your Inbox! It's free!
Check out our next project, Biology.Net
From other science news sites
Popular science news articles
- Nitrogen fingerprint in biomolecules could be from early sun
- Climate detectives reveal handprint of human caused climate change in Australia
- Alcohol makes smiles more 'contagious,' but only for men
- Plants prepackage beneficial microbes in their seeds
- Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence
- Preference for built-up habitats could explain rapid spread of the tree bumblebee in UK
- Clear skies on exo-Neptune
- Earth's water is older than the sun
- Tooth buried in bone shows prehistoric predators tangled across land, sea
- Talk therapy -- not medication -- best for social anxiety disorder, large study finds
- Ancient mammal relatives were active at night 100 million years before origin of mammals
- Rosetta-Alice spectrograph obtains first far ultraviolet spectra of a cometary surface
- Giant garbage patches help redefine ocean boundaries
- Newly identified galactic supercluster is home to the Milky Way
- How much gravity is enough?