Permafrost is frozen ground that remains at or below zero degrees Celsius (32 degrees Fahrenheit) for two or more years. It forms in regions where the mean annual temperature is colder than zero degrees Celsius. Permafrost is found beneath about 20 percent of the land in the Northern Hemisphere. It is widespread in the Arctic and in parts of Antarctica. Most of the world’s permafrost has been frozen for 1000s of years and can be up to 1,500 metres (almost 5,000 feet) thick. The layer of ground above permafrost that is subject to annual thawing and freezing is called the active layer.

  • > Chokurdakh Scientific Tundra Station

    Field Sites

    STATION NAME AND OWNER The Chokurdakh Scientific TundraA type of ecosystem in which tree growth is limited by low temperatures. The origin of the word

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  • > Barrow Arctic Research Center/Environmental Observatory

    Field Sites

    STATION NAME AND OWNER The Barrow ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic

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  • > Toolik Field Station

    Field Sites

    STATION NAME AND OWNER The Toolik Field Station (TFS) belongs to the Institute of ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural

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  • > Western Arctic Research Centre

    Field Sites

    NAME AND OWNER The Western ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic as

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  • > Canadian High Arctic Research Station CHARS

    Field Sites

    STATION NAME AND OWNER The Canadian High ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic

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  • > Arctic Station

    Field Sites

    STATION NAME AND OWNER Owner of the ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the

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  • > Arctic DTU Research Station

    Field Sites

    STATION NAME AND OWNER ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic as areas

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  • > AWIPEV Arctic Research Base

    Field Sites

    STATION NAME AND OWNER AWIPEV ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic as

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  • > CNR Arctic Station “Dirigibile Italia”

    Field Sites

    STATION NAME AND OWNER The Italian ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic

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  • > Numto Park Station

    Field Sites

    STATION NAME AND OWNER The Numto Park Station belongs to the UNESCO Chair on Environmental Dynamics and Climate ChangeAccording to the United Nations Framework Convention

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  • > Stories of Arctic Science

    Publications

    This book contains stories of cutting-edge ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic

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  • > Siberian tundra eruptions

    News

    INTERACT observer station manager Aleksandr Sokolov in article on methaneA colourless, odourless gas (chemical formula CH4). Some microbesproduce methane. It can also be found in underground

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  • > Summer school at INTERACT partner TSU

    News

    5th International Summer School for Students and Young Scientists — 2018 Natural and human environment of ArcticDefinitions of the Arctic vary according to environmental, geographical,

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  • > Thawing permafrost – a hot topic

    News

    Nunataryuk, part of the EU Arctic Cluster along with INTERACT and eight other projects related to ArcticDefinitions of the Arctic vary according to environmental, geographical,

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  • > INTERACT Stories of Arctic Science and Stations continue on June 16th at 14-15 CEST

    News

    INTERACT Stories of ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic as areas having

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  • > Release of 5 AMAP Assessments

    News

    On the 25th of April 5 new AMAPArctic Monitoring and Assessment Programme. One of the working groups of the Arctic Council. Established in 1991. AMAP

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  • > PhD Position “Permafrost thaw events” available at INTERACT partner AWI

    News

    The PhD candidate will use datasets and field studies to explore how changing water surfaces in the ArcticDefinitions of the Arctic vary according to environmental,

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  • > Call for Registration: Arctic Alaska Vegetation Summer Field Course

    News

    ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic as areas having a high latitude,

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  • > INTERACT part of the EU Arctic Cluster

    News

    The EU ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic as areas having a

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  • > Tune in to the INTERACT Arctic Research Blogs

    News

    When things slow down during the summer holiday season, in arcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some

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  • > Home

    Welcome to INTERACT – International Network for Terrestrial Research and Monitoring in the Arctic INTERACT is an infrastructure project under the auspices of SCANNET, a

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  • > Arctic Awareness

    INTERACT aims to inform and interact with the public, stakeholders and primary, secondary and tertiary students. In particular, we will work with people living in

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  • > INTERACT Educational Resources

    INTERACT collaborates with Wicked Weather Watch to produce resources for teaching ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists

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  • > Transport and communication

    Connecting the Arctic: Transport and Communication ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic

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  • > TA Ambassadors

    INTERACT TA Ambassadors are scientists who have conducted research at INTERACT stations with the support from Transnational Access. TA Ambassadors share knowledge –based on their

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  • > Arctic

    Glossary

    Definitions of the ArcticDefinitions of the Arctic vary according to environmental, geographical, political, cultural and scientific perspectives. Some scientists define the Arctic as areas having

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  • > Palsa mire

    Glossary

    A type of mire (or boggy wetland) complex found in boreal and alpine regions. Palsas are peatPeat is a soil type formed from slowly decomposing vegetation. It is found

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  • > Peat

    Glossary

    PeatPeat is a soil type formed from slowly decomposing vegetation. It is found in wet areas where the lack of oxygen slows the breakdown of

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  • > Pingo

    Glossary

    A frost mound, consisting of an ice core covered with soil and vegetation. They are found in permafrost regions. They are formed when water is naturally injected

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  • > SWIPA

    Glossary

    “Snow, Water, Ice, PermafrostPermafrost is frozen ground that remains at or below zero degrees Celsius (32 degrees Fahrenheit) for two or more years. It forms

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  • > Thermokarst

    Glossary

    A landform that results when ground ice (ice-rich permafrostPermafrost is frozen ground that remains at or below zero degrees Celsius (32 degrees Fahrenheit) for two or

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  • > Thermokarst lake

    Glossary

    A (usually shallow) body of water found in a depression within a thermokarst landform. The water is from thawed permafrostPermafrost is frozen ground that remains at or below

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  • > Tundra

    Glossary

    A type of ecosystemAll the living organisms (including people) in an area as well as its physical environment, functioning together as a unit. An ecosystem

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  • > Climate feedback mechanism

    Glossary

    A change in the climateThe average weather we would expect over a long period of time (seasons, years, decades). Climate varies from place-to-place across the

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