21 Jan 2013:
NASA Map Shows Air Pollution
Across Asia and the Middle East
New satellite data released by NASA provide dramatic visual evidence of the dangerous air quality reported from cities across Asia and the Middle East this month. Based on data collected from its
satellite-based Ozone Monitoring Instrument, a map released by NASA scientists
illustrates high levels of nitrogen dioxide (NO2) — shown in orange — over several major cities, including Istanbul, Tehran and New Delhi, during the first week of January. Satellite measurements of nitrogen dioxide concentrations are a good indicator of air quality since NO2 is produced by the same fossil fuel-burning processes that also send sulfur dioxide and aerosols into the atmosphere, such as from vehicles, industrial sites, and power plants. During the winter months, nitrogen dioxide often gets trapped near the earth's surface for long periods as a result of cold temperatures and strong high-pressure systems, contributing to small particle pollution. The high concentrations of NO2 illustrated in the NASA map, based on measurements from Jan. 1 to 8, coincided with reports
from several cities of yellow hazy skies, unhealthy air quality, and elevated cases of lung ailments.
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
e360 on Facebook
Donate to e360
View mobile site
Subscribe to our newsletter
Subscribe to our feed:
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.
is now available for mobile devices at e360.yale.edu/mobile
The Warriors of Qiugang
, a Yale Environment 360
video, chronicles a Chinese village’s fight against a polluting chemical plant. It was nominated for a 2011 Academy Award for Best Documentary Short.
Watch the video.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.
, winner of the Yale Environment 360 Video Contest, documents the work of African researchers monitoring wildlife in Uganda's remote Bwindi Impenetrable National Park. Watch the video.