What is a Polar Vortex?
From the Research Tool Dictionary:
A polar vortex is a persistent, large-scale cyclone located near one or both of a planet's geographical poles. On Earth, the polar vortices are located in the middle and upper troposphere and the stratosphere. They surround the polar highs and lie in the wake of the polar front. ....
Other definitions from the Web…
According to Wunderground.com, a polar vortex is a semi permanent weather system consisting of a low pressure area in the upper atmosphere. What's a Polar Vortex?: The Science Behind Arctic Outbreaks
What does a Polar Vortex look like?
From the Research Tool Images:
More information using Scholar:
Butchart, Neal, and Ellis E Remsberg. "The area of the stratospheric polar vortex as a diagnostic for tracer transport on an isentropic surface." Journal of the atmospheric sciences 43.13 (1986): 1319-1339.
News of the day:
City
|
Low Temp. Jan 6-7, 2014 (°F)
|
Avg. Low Temp. Jan 6-7 (°F)
|
Difference between Avg. Low & 2014 Low (°F)
|
Indianapolis, IN
|
-15
|
21
|
36
|
Cleveland, OH
|
-10
|
24
|
34
|
Chicago, IL
|
-15
|
18
|
33
|
Detroit, MI
|
-12
|
21
|
33
|
Minneapolis, MN
|
-23
|
8
|
31
|
Columbus, OH
|
-7
|
23
|
30
|
Louisville, KY
|
-3
|
27
|
30
|
Milwaukee, WI
|
-14
|
16
|
30
|
Tulsa, OK
|
-2
|
27
|
29
|
Kansas City, MO
|
-6
|
22
|
28
|
Colorado Springs, CO
|
-10
|
18
|
28
|
Denver, CO
|
-8
|
18
|
26
|
Nashville, TN
|
2
|
28
|
26
|
Atlanta, GA
|
6
|
32
|
26
|
Baltimore, MD
|
4
|
29
|
25
|
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