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AIRS Captures Polar Vortex Moving in Over US
by Staff Writers
Pasadena CA (JPL) Feb 01, 2019

NASA's Atmospheric Infrared Sounder (AIRS) instrument captures a polar vortex moving from Central Canada into the U.S. Midwest from January 20 through January 29. see full animation here

The U.S. Midwest has been gripped by the lowest temperatures it has seen in years. An unusually cold Arctic air mass, called a polar vortex, is responsible for the severe temperatures, which in many areas have plunged well below 0 degrees Fahrenheit (-18 degrees Celsius).

NASA's Atmospheric Infrared Sounder (AIRS) instrument aboard the Aqua satellite captured the polar vortex as it moved southward from central Canada into the U.S. Midwest from Jan. 20 through Jan. 29. The lowest temperatures are shown in purple and blue and range from -40 degrees Fahrenheit (also -40 degrees Celsius) to -10 degrees Fahrenheit (-23 degrees Celsius). As the data series progresses, you can see how the coldest purple areas of the air mass scoop down into the U.S.

The polar vortex is responsible for a number of deaths, disruptions to services, and energy outages in the affected areas.

AIRS, in conjunction with the Advanced Microwave Sounding Unit (AMSU), senses emitted infrared and microwave radiation from Earth to provide a three-dimensional look at Earth's weather and climate. Working in tandem, the two instruments make simultaneous observations down to Earth's surf

ace. With more than 2,000 channels sensing different regions of the atmosphere, the system creates a global, three-dimensional map of atmospheric temperature and humidity, cloud amounts and heights, greenhouse gas concentrations and many other atmospheric phenomena.

Launched into Earth orbit in 2002, the AIRS and AMSU instruments are managed by NASA's Jet Propulsion Laboratory in Pasadena, California, under contract to NASA. JPL is a division of the Caltech in Pasadena.


Related Links
Atmospheric Infrared Sounder at JPL
It's A White Out at TerraDaily.com


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WHITE OUT
US Midwest gripped by bitterly cold temperatures but relief ahead
Chicago (AFP) Jan 31, 2019
Brutally cold temperatures gripped the US Midwest on Thursday, freezing water mains, causing power outages, canceling flights and straining natural gas supplies. Tens of millions of Americans shivered for a second day as the mercury dipped to record lows in several states. Ten deaths have been attributed to the sub-zero weather and a weekend snowstorm that deluged the same region. Many of the cold-related fatalities were in Michigan, where the governor said the death toll was still being confirm ... read more

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