Imagery and an animation of infrared imagery from the AIRS instrument aboard NASA's Aqua satellite showed the movement of cold, Arctic air over the U.S. from Dec. 1 to Dec. 11. That frigid air mass is expected to affect states from the north central to the northeastern and Mid-Atlantic.
The Atmospheric Infrared Sounder or AIRS instrument measures temperature data in infrared light. At NASA's Jet Propulsion Laboratory in Pasadena, California, a series of AIRS images and an animated were created to depict the temperature of air at heights of 500 millibars.
This animation of AIRS imagery from NASA's Aqua satellite from Dec. 1 to 11 shows the movement of cold air over the US Cooler temperatures appear in darker blue and warmer temperatures in dark orange. On Dec. 7, cold Arctic air descended into the Plains states and reached Colorado, Kansas and Missouri. That cold air shifted east on Dec. 9 into the Ohio Valley and New England.
Credits: NASA JPL, Ed Olsen
Temperatures at that level of the atmosphere were as cold as or colder than minus 30 degrees Celsius (minus 2 degrees Fahrenheit). 500 millibars is about 18,000 feet or 5,500 meters high. A millibar is a unit for measuring air pressure.
The animation of AIRS imagery showed the cooler temperatures in darker blue and warmer temperatures in dark orange. The edge of the blue indicated the border of the cold air. On Dec. 7, cold arctic air descended into the Plains states and reached Colorado, Kansas and Missouri.
That cold air shifted east on Dec. 9 into the Ohio Valley and New England. On Dec. 11 another trough of cold air was sweeping down from Canada into the northern plains and is expected to bring very chilly temperatures over the north central and northeastern U.S. on Dec. 14 and 15..
On AIRS 500 millibar imagery, generally, warmer than average temperatures can be found under ridges where the curve lifts northward. Colder temperatures can be found under troughs, or where the front dips toward the southward.
These maps give a large-scale picture of the weather pattern over the continental United States and North America. The 500 millibar maps are useful in examining winter weather patterns between about 30 degrees and 60 degrees latitude.
A cold air mass in place over the northern plains on Dec. 13 is expected to be reinforced by a fast-moving arctic frontal boundary on Dec. 14.That second air mass is expected to drop temperatures 20 to 30 degrees below average from the northern plains to the Upper Midwest.
NOAA's National Weather Service's Weather Prediction Service in College Park, Maryland noted in their forecast discussion on Dec. 13, "An arctic air mass will produce wind chills of minus 20 degrees Fahrenheit or colder across the northern Plains over the next few days. This arctic air will move down the Plains and into the Ohio and Tennessee Valleys into the mid-Atlantic and northeast by the end of the week."
Rob Gutro | EurekAlert!
Ten-year anniversary of the Neumayer Station III
18.01.2019 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
The pace at which the world’s permafrost soils are warming
16.01.2019 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
The scientific and political community alike stress the importance of German Antarctic research
Joint Press Release from the BMBF and AWI
The Antarctic is a frigid continent south of the Antarctic Circle, where researchers are the only inhabitants. Despite the hostile conditions, here the Alfred...
World first experiments on sensor that may revolutionise everything from medical devices to unmanned vehicles
The new sensor - capable of detecting vibrations of living cells - may revolutionise everything from medical devices to unmanned vehicles.
Dead and alive at the same time? Researchers at the Max Planck Institute of Quantum Optics have implemented Erwin Schrödinger’s paradoxical gedanken experiment employing an entangled atom-light state.
In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. The crucial element of this gedanken...
Cellulose obtained from wood has amazing material properties. Empa researchers are now equipping the biodegradable material with additional functionalities to produce implants for cartilage diseases using 3D printing.
It all starts with an ear. Empa researcher Michael Hausmann removes the object shaped like a human ear from the 3D printer and explains:
The phenomenon of so-called superlubricity is known, but so far the explanation at the atomic level has been missing: for example, how does extremely low friction occur in bearings? Researchers from the Fraunhofer Institutes IWM and IWS jointly deciphered a universal mechanism of superlubricity for certain diamond-like carbon layers in combination with organic lubricants. Based on this knowledge, it is now possible to formulate design rules for supra lubricating layer-lubricant combinations. The results are presented in an article in Nature Communications, volume 10.
One of the most important prerequisites for sustainable and environmentally friendly mobility is minimizing friction. Research and industry have been dedicated...
16.01.2019 | Event News
14.01.2019 | Event News
12.12.2018 | Event News
18.01.2019 | Materials Sciences
18.01.2019 | Life Sciences
18.01.2019 | Health and Medicine