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6 votes
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What is the relevance of Arctic coastal erosion to the Earth's climate?

If we consider only the climatic impacts of Arctic coastal erosion, there are still two sides of the question of how relevant is Arctic coastal erosion of permafrost. The first side is how big is its ...
Camilo Rada's user avatar
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6 votes

How deep does the frost have to go before it becomes permafrost?

Permafrost is permanently frozen ground. However, most definition qualify it as permafrost if it remains frozen for at least two years. The speed at which a temperature change travels down the ground ...
Camilo Rada's user avatar
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4 votes

The origin of permafrost

What caused a centuries long freeze, the beginning of the current ice age. Yes we are in an ice age, as long as greenland and antarctica have large ice sheets we are technically in an ice age) Which ...
John's user avatar
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3 votes

How deep does the frost have to go before it becomes permafrost?

There is actually a name for this phenomenon: "pereletok" How deep would the frost have to go before it was too deep for it to thaw fully over summer? This depends more on the thermal ...
alex_danielssen's user avatar
1 vote

The origin of permafrost

Doesn't that mean that it froze quickly, centuries ago, and stayed frozen until now? Not necessarily. In places where permafrost exists, the thickness of the 'active layer' (the layer above ...
alex_danielssen's user avatar
1 vote

What is the relevance of Arctic coastal erosion to the Earth's climate?

SANDIA REPORT“The Arctic Coastal Erosion Problem”by Sandia National Laboratories, SAND2016-9762, September,2016 "One-third of the coastline in the world is Arctic permafrost [Lantuit et al., 2012]. ...
will smith's user avatar
1 vote

Actual thickness of permafrost vs theoretical maximum possibly permafrost thickness

I resolved the following based on your input: $z = (T_s)(k/q)$ for the granite case, where $75 = (3)(k/0.04)$ where $k = 1$ so based on this site here, typical granite thermal conductivity is in ...
marsisalie's user avatar
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1 vote

Permafrost thickness

This is a non-exhaustive list of factors influencing the permafrost thickness : latitude altitude aspect material type nature of the regional climate (dry, oceans, continental) geologic history of ...
marsisalie's user avatar
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