Image from TERRA
Thu, 07 Oct 2021 13:00 EDT

The U.S. Forest Service now has a powerful way to view near-real time fire detection from NASA satellite data that they can include in their hourly air quality forecasts.

Image from TERRA
Thu, 23 Sep 2021 14:53 EDT

New NASA research shows that by releasing heat and moisture through a large hole in sea ice known as a polynya, the exposed ocean fuels the formation of more clouds that trap heat in the atmosphere and hinder the refreezing of new sea ice.

Image from TERRA
Tue, 24 Aug 2021 13:05 EDT

Smoke from several large wildfires burning in Northern California can be seen traveling miles into the atmosphere.

Winter Fog Becoming Rare in California

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From time to time, in the wake of winter rain, dense fog fills the wide valley between California’s Sierra Nevada and Coastal Range. Called Tule fog, the phenomenon is as much a part of winter in the Central Valley as snow is in the mountain. In recent years, however, the fog has come less often. In fact, since 1981 the number of fog days between November and February has decreased by 46 percent, according to a recent study. The decrease is bad news for California’s fruit and nut farmers.

This image, acquired on January 17, 2011, by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite, shows one of the more recent valley fog events. (Drought has limited the number of fog events since 2012.) University of California–Berkeley researchers Dennis Baldocchi and Eric Waller used images from MODIS and from NOAA’s advanced very high resolution radiometer (AVHRR) to count the number of fog days since 1981. They found a downward trend. Read more

NASA Earth Observatory image by Jesse Allen with data from the Land Atmosphere Near real-time Capability for EOS (LANCE). Caption by Holli Riebeek.

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