Image from TERRA
Mon, 19 Apr 2021 13:00 EDT

From the vantage point of space, NASA’s fleet of Earth-observing satellites investigates connections between ecosystems that are continents apart, or right next door.

Image from TERRA
Mon, 08 Mar 2021 12:00 EST

Farmers, researchers, meteorologists and others now have access to high-resolution NASA data on soil moisture, thanks to a new tool developed by the U.S. Department of Agriculture (USDA)’s National Agricultural Statistics Service (NASS) in collaboration with NASA and George Mason University.

Image from TERRA
Thu, 04 Feb 2021 10:00 EST

NASA satellite data helps people maintain thousands of freshwater pumps by highlighting places in Africa most at-risk for drought.

2015 a Dry Year for Snowpack in the Sierras

sierranevada_tmo_2015090Snowpack in the Sierra Nevada range in Central California is at a record low. The Moderate Imaging Spectroradiometer on NASA’s Terra satellite captured this image, published on NASA’s Earth Observatory, of the Sierra Nevada, showing just how brown these typically very white, snow covered mountains have become since 2011, a wet and snowy year with extensive snow pack. To compare images from 2011 with 2015, used the image comparison tool on the NASA Earth Observatory site.

Since 2011, winter snow pack decreased, reducing amounts of melt water in the spring and summer. In March of 2015, ground-based monitoring sites in the Sierras reported that there was no snow cover for the first time ever, while about one-third of the sites were measuring at the lowest snow pack ever recorded.

In a recent article in Nature Climate Change, scientists from the University of Arizona used tree-ring records of precipitation anomalies to construct a 500-year history of snow water equivalent on the Sierra Nevada, showing just how unprecedented this lack of snow pack is in the past 500 years.

Read more on NASA’s Earth Observatory

Read the article on Nature Climate Change

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