Definition of permafrost in English:

permafrost

noun ˈpəːməfrɒstˈpərməˌfrɔst

mass noun

A thick subsurface layer of soil that remains below freezing point throughout the year, occurring chiefly in polar regions.
hilly terrain underlain by permafrost
Example sentencesExamples
- These self-organized patterns result from the effects of freezing and thawing on layers of stone and soil overlying permafrost.
- Increased snow and ice melt have caused higher rivers while thawing permafrost has wreaked havoc with roads and other infrastructure.
- In regions influenced by permafrost, water migrates along the thermal gradient from warm to cold, thereby feeding ice in the frozen core.
- It's estimated that a quarter to a third of all soil carbon is locked in permafrost.
- The rest of the year what little soil there is on the surface is rock hard above permafrost.
- We are already beginning to see the likely effects of climate change: melting permafrost and the retreat of permanent icepacks.
- The forest grows atop permafrost, a layer of soil that remains frozen year-round.
- However, permafrost covered large northern areas and many habitats were fragmented and displaced southward.
- A species of bacterium locked in Alaskan permafrost for 32,000 years woke up and started swimming as soon as its medium melted.
- Hot, dry summers have thawed permafrost layers and shriveled berry crops.
- Most of the remainder comes from wetlands, gas hydrates, permafrost, and termites.
- These climates introduced permafrost and cold-climate weathering products to river systems.
- On Alaska's northern coast, they met Native Alaskans dealing with melting permafrost and coastal erosion.
- However, there may be water locked in permafrost in some deep polar craters.
- But most of it is under tundra permafrost, if not indeed under even more inhospitable terrain.
- In the north soil takes the form of permafrost, where the water in the ground is permanently frozen.
- It's springtime in Siberia, where slumbering mammoths are emerging from melting permafrost.
- In some areas, thawing of permafrost will improve infiltration.
- The permafrost below the topsoil is frozen all year around, and this prevents roots from penetrating deeply into the ground.
- In many high mountains regions, permafrost may be present.

Origin

1940s: from permanent + frost.

Definition of permafrost in US English:

permafrost

nounˈpərməˌfrɔstˈpərməˌfrôst

A thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in polar regions.
hilly terrain underlain by permafrost
Example sentencesExamples
- However, there may be water locked in permafrost in some deep polar craters.
- However, permafrost covered large northern areas and many habitats were fragmented and displaced southward.
- A species of bacterium locked in Alaskan permafrost for 32,000 years woke up and started swimming as soon as its medium melted.
- In the north soil takes the form of permafrost, where the water in the ground is permanently frozen.
- We are already beginning to see the likely effects of climate change: melting permafrost and the retreat of permanent icepacks.
- Most of the remainder comes from wetlands, gas hydrates, permafrost, and termites.
- On Alaska's northern coast, they met Native Alaskans dealing with melting permafrost and coastal erosion.
- In some areas, thawing of permafrost will improve infiltration.
- In regions influenced by permafrost, water migrates along the thermal gradient from warm to cold, thereby feeding ice in the frozen core.
- The permafrost below the topsoil is frozen all year around, and this prevents roots from penetrating deeply into the ground.
- The forest grows atop permafrost, a layer of soil that remains frozen year-round.
- The rest of the year what little soil there is on the surface is rock hard above permafrost.
- These climates introduced permafrost and cold-climate weathering products to river systems.
- It's estimated that a quarter to a third of all soil carbon is locked in permafrost.
- These self-organized patterns result from the effects of freezing and thawing on layers of stone and soil overlying permafrost.
- It's springtime in Siberia, where slumbering mammoths are emerging from melting permafrost.
- Increased snow and ice melt have caused higher rivers while thawing permafrost has wreaked havoc with roads and other infrastructure.
- Hot, dry summers have thawed permafrost layers and shriveled berry crops.
- But most of it is under tundra permafrost, if not indeed under even more inhospitable terrain.
- In many high mountains regions, permafrost may be present.

Origin

1940s: from permanent + frost.

单词	permafrost
释义	Definition of permafrost in English: permafrost noun ˈpəːməfrɒstˈpərməˌfrɔst mass noun A thick subsurface layer of soil that remains below freezing point throughout the year, occurring chiefly in polar regions. hilly terrain underlain by permafrost Example sentencesExamples These self-organized patterns result from the effects of freezing and thawing on layers of stone and soil overlying permafrost. Increased snow and ice melt have caused higher rivers while thawing permafrost has wreaked havoc with roads and other infrastructure. In regions influenced by permafrost, water migrates along the thermal gradient from warm to cold, thereby feeding ice in the frozen core. It's estimated that a quarter to a third of all soil carbon is locked in permafrost. The rest of the year what little soil there is on the surface is rock hard above permafrost. We are already beginning to see the likely effects of climate change: melting permafrost and the retreat of permanent icepacks. The forest grows atop permafrost, a layer of soil that remains frozen year-round. However, permafrost covered large northern areas and many habitats were fragmented and displaced southward. A species of bacterium locked in Alaskan permafrost for 32,000 years woke up and started swimming as soon as its medium melted. Hot, dry summers have thawed permafrost layers and shriveled berry crops. Most of the remainder comes from wetlands, gas hydrates, permafrost, and termites. These climates introduced permafrost and cold-climate weathering products to river systems. On Alaska's northern coast, they met Native Alaskans dealing with melting permafrost and coastal erosion. However, there may be water locked in permafrost in some deep polar craters. But most of it is under tundra permafrost, if not indeed under even more inhospitable terrain. In the north soil takes the form of permafrost, where the water in the ground is permanently frozen. It's springtime in Siberia, where slumbering mammoths are emerging from melting permafrost. In some areas, thawing of permafrost will improve infiltration. The permafrost below the topsoil is frozen all year around, and this prevents roots from penetrating deeply into the ground. In many high mountains regions, permafrost may be present. Origin 1940s: from permanent + frost. Definition of permafrost in US English: permafrost nounˈpərməˌfrɔstˈpərməˌfrôst A thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in polar regions. hilly terrain underlain by permafrost Example sentencesExamples However, there may be water locked in permafrost in some deep polar craters. However, permafrost covered large northern areas and many habitats were fragmented and displaced southward. A species of bacterium locked in Alaskan permafrost for 32,000 years woke up and started swimming as soon as its medium melted. In the north soil takes the form of permafrost, where the water in the ground is permanently frozen. We are already beginning to see the likely effects of climate change: melting permafrost and the retreat of permanent icepacks. Most of the remainder comes from wetlands, gas hydrates, permafrost, and termites. On Alaska's northern coast, they met Native Alaskans dealing with melting permafrost and coastal erosion. In some areas, thawing of permafrost will improve infiltration. In regions influenced by permafrost, water migrates along the thermal gradient from warm to cold, thereby feeding ice in the frozen core. The permafrost below the topsoil is frozen all year around, and this prevents roots from penetrating deeply into the ground. The forest grows atop permafrost, a layer of soil that remains frozen year-round. The rest of the year what little soil there is on the surface is rock hard above permafrost. These climates introduced permafrost and cold-climate weathering products to river systems. It's estimated that a quarter to a third of all soil carbon is locked in permafrost. These self-organized patterns result from the effects of freezing and thawing on layers of stone and soil overlying permafrost. It's springtime in Siberia, where slumbering mammoths are emerging from melting permafrost. Increased snow and ice melt have caused higher rivers while thawing permafrost has wreaked havoc with roads and other infrastructure. Hot, dry summers have thawed permafrost layers and shriveled berry crops. But most of it is under tundra permafrost, if not indeed under even more inhospitable terrain. In many high mountains regions, permafrost may be present. Origin 1940s: from permanent + frost.
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