11 Jul 2012:
Technique ‘Sees Through’ Clouds
To Measure Atmospheric Pollution
U.S. scientists say they have developed a technique to measure atmospheric levels of pollution, including soot, with satellite technology even when skies are cloud-covered. While clouds typically impair a remote-sensing
Clouds over the coastline of Chile and Peru
satellite’s ability to detect pollution levels closer to the ground, University of Iowa scientists say their new technique enables them to calculate particle concentrations
by measuring the degree to which those pollutants affect the properties of the clouds above them. After calculating the number of droplets in the clouds using satellite data, they say, researchers assimilate those results with a numerical model that estimates particle concentrations by describing the interaction between the aerosols and the clouds. “This technique can directly improve predictions of near-surface, fine-mode aerosols — such as coal-fired electric generating plants and wood-fueled cooking stoves — responsible for human health impacts” and low-cloud solar heating, said Greg Carmichael, lead author of the study published in the journal Proceedings of the National Academy of Sciences
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
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
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
The 2015 Yale e360 Video Contest winner documents a Northeastern town's bitter battle over a wind farm. Watch the video.
A 2015 Yale e360 Video Contest winner captures stunning images of wild salmon runs in Alaska. Watch the video.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate. Watch the video.
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.