| Air canada (1) |  |
| Air china (1) | |
| Air france (3) | |
| Air portugal (2) | |
| Airline (96) | |
| Alaska airlines (1) | |
| Alitalia (2) | |
| American airlines (1) | |
| Arctic air (2) | |
| British airways (1) | |
| Cathay pacific (1) | |
| Easyjet (1) | |
| El al airlines (1) | |
| Finnair (1) | |
| Japan airlines (1) | |
| Klm (6) | |
| Lufthansa (12) | |
| Polish airlines (1) | |
| Twa (10) | |
| United airlines (1) | |
| Us airways (2) | |
The more intense flow tends to fence off cold Arctic air keeping incursions like last winter s Polar Vortex episodesfrom impacting the northern parts of the country.
Permafrost soils are warming even faster than Arctic air temperatures--as much as 2. 7 to 4. 5 degrees Fahrenheit (1. 5 to 2. 5 degrees Celsius) in just the past 30 years
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