Definitions for permafrost
ˈpɜr məˌfrɔst, -ˌfrɒstper·mafrost

Princeton's WordNetRate this definition:0.0 / 0 votes

1. permafrostnoun

   ground that is permanently frozen

WiktionaryRate this definition:3.0 / 1 vote

1. permafrostnoun

   Permanently frozen ground, or a specific layer thereof.

WikipediaRate this definition:0.0 / 0 votes

1. Permafrost

   Permafrost is ground that continuously remains below 0 °C (32 °F) for two or more years, located on land or under the ocean. Most common in the Northern Hemisphere, around 15% of the Northern Hemisphere or 11% of the global surface is underlain by permafrost, with the total area of around 18 million km2. This includes substantial areas of Alaska, Greenland, Canada and Siberia. It can also be located on mountaintops in the Southern Hemisphere and beneath ice-free areas in the Antarctic. Permafrost does not have to be the first layer that is on the ground. It can be from several centimeters to several hundred meters deep under the Earth's surface. It frequently occurs in ground ice, but it can also be present in non-porous bedrock. Permafrost is formed from ice holding various types of soil, sand, and rock in combination.Permafrost contains large amounts of biomass and decomposed biomass that has been stored as methane and carbon dioxide, making tundra soil a carbon sink. As global warming heats the ecosystem and causes soil thawing, the permafrost carbon cycle accelerates and releases much of these soil-contained greenhouse gases into the atmosphere, creating a feedback cycle that increases climate change. Thawing of permafrost is one of the effects of climate change. While emissions from thawing permafrost will be significant enough to lead to additional warming, they will likely not be enough to trigger a self-reinforcing feedback leading to "runaway warming".

ChatGPTRate this definition:0.0 / 0 votes

1. permafrost

   Permafrost is a layer of soil, rock or sediment that is frozen for two or more years. It is typically found in regions with cold climates, such as the Arctic, where the temperature remains below freezing point for most of the year. The thickness of permafrost can range from less than a meter to several kilometers. It significantly impacts the ecosystem, as well as human infrastructure, particularly when it begins to thaw due to climate change.

WikidataRate this definition:5.0 / 1 vote

1. Permafrost

   In geology, permafrost or cryotic soil is soil at or below the freezing point of water 0 °C for two or more years. Most permafrost is located in high latitudes, but alpine permafrost may exist at high altitudes in much lower latitudes. Ground ice is not always present, as may be in the case of nonporous bedrock, but it frequently occurs and it may be in amounts exceeding the potential hydraulic saturation of the ground material. Permafrost accounts for 0.022% of total water and exists in 24% of exposed land in the Northern Hemisphere. A global temperature rise of 1.5 °C above current levels would be enough to start the melting of permafrost in Siberia, according to one group of scientists.

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1. • Land

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How to say permafrost in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of permafrost in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of permafrost in Pythagorean Numerology is: 5

Examples of permafrost in a Sentence

1. Birgitta Evengård:

   If there is a virus hidden in the permafrost that we have not been in contact with for thousands of years, it might be that our immune defense is not sufficient, it is correct to have respect for the situation and be proactive and not just reactive. And the way to fight fear is to have knowledge.

2. Love Dalén:

   It’s not like everything found in the permafrost always works, the vast majority of samples have cr — DNA.

3. Charlie Paull:

   Heat carried in slowly moving groundwater systems is contributing to the decay of submerged permafrost, creating large sinkholes in some areas and ice-filled hills called pingos in other areas.

4. Roman Vilfand:

   The warming that is being observed not only in winter but also in summer is dangerous because it causes the permafrost to thaw, the concept of 'permanent' disappears, and the frost turns out not to be eternal.

5. Evgeny Chuvilin:

   Permafrost degradation is a slow process. We're usually talking about centimeters per year. This here is more than merely degradation, it's also a qualitative change. So, I would say that yes, it is unexpected to see, hypotheses had been voiced in the literature concerning the possibility of such processes, but this is the first time they have been directly observed.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=permafrost
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Permafrost
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Permafrost
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=permafrost