Image from TERRA
Mon, 30 Oct 2017 12:25 EDT

Former Tropical Storm Saola transitioned into an extra-tropical storm on Oct. 29 as it tracked southeast of the big island of Japan.

Image from TERRA
Tue, 24 Oct 2017 11:36 EDT

When Typhoon Lan made landfall in Japan on Oct. 22, the Global Precipitation Measurement mission core satellite or GPM analyzed the storm and added up the high rainfall that it generated.

Image from TERRA
Tue, 24 Oct 2017 09:22 EDT

A new image from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra satellite shows the growing fire scar on the landscape.

Comparing Land Surface and Air Temperatures of Urban Heat Islands Over the Contiguous USA

Urban Heat Islands are caused by materials in buildings, parking lots, and other infrastructures in cities that capture and store radiation from the sun.  Often these materials are impervious, meaning that no liquid can penetrate directly into the ground. These materials release energy at night in the form of heat.  A recent publication presented at American Geophysical Union sought to assess the urban surface heat island signature on land surface temperature change over the United States and make comparisons to local air temperatures provided by the Global Historical Climatology Network. The team used the National Land Cover Database Impervious Surface Area and the MODIS Land Surface Database from 2001 and 2006.

The team overlaid the National Land Cover Database Impervious Surface Area map over the local air temperatures from the Global Historical Climatology Network station distribution map, identifying over 300 urban settlements.  They compared the local air temperatures versus the land surface temperatures at night and at midday. They found that the observed temperature change was evident in both sets of data, however the magnitude differed. Local air temperatures from the Global Historical Climatology Network tend to underestimate the surface temperatures during daytime, especially during summer and in non-forested stations.

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