Permafrost thermal state in the polar Northern Hemisphere during the international polar year 2007–2009: a synthesis
Abstract The permafrost monitoring network in the polar regions of the Northern Hemisphere was enhanced during the International Polar Year (IPY), and new information on permafrost thermal state was collected for regions where there was little available. This augmented monitoring network is an impor...
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crwiley:10.1002/ppp.689 2024-09-15T18:11:26+00:00 Permafrost thermal state in the polar Northern Hemisphere during the international polar year 2007–2009: a synthesis Romanovsky, Vladimir E. Smith, Sharon L. Christiansen, Hanne H. 2010 http://dx.doi.org/10.1002/ppp.689 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.689 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.689 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 21, issue 2, page 106-116 ISSN 1045-6740 1099-1530 journal-article 2010 crwiley https://doi.org/10.1002/ppp.689 2024-09-05T05:08:59Z Abstract The permafrost monitoring network in the polar regions of the Northern Hemisphere was enhanced during the International Polar Year (IPY), and new information on permafrost thermal state was collected for regions where there was little available. This augmented monitoring network is an important legacy of the IPY, as is the updated baseline of current permafrost conditions against which future changes may be measured. Within the Northern Hemisphere polar region, ground temperatures are currently being measured in about 575 boreholes in North America, the Nordic region and Russia. These show that in the discontinuous permafrost zone, permafrost temperatures fall within a narrow range, with the mean annual ground temperature (MAGT) at most sites being higher than −2°C. A greater range in MAGT is present within the continuous permafrost zone, from above −1°C at some locations to as low as −15°C. The latest results indicate that the permafrost warming which started two to three decades ago has generally continued into the IPY period. Warming rates are much smaller for permafrost already at temperatures close to 0°C compared with colder permafrost, especially for ice‐rich permafrost where latent heat effects dominate the ground thermal regime. Colder permafrost sites are warming more rapidly. This improved knowledge about the permafrost thermal state and its dynamics is important for multidisciplinary polar research, but also for many of the 4 million people living in the Arctic. In particular, this knowledge is required for designing effective adaptation strategies for the local communities under warmer climatic conditions. Copyright © 2010 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice International Polar Year IPY permafrost Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes 21 2 106 116 |
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English |
description |
Abstract The permafrost monitoring network in the polar regions of the Northern Hemisphere was enhanced during the International Polar Year (IPY), and new information on permafrost thermal state was collected for regions where there was little available. This augmented monitoring network is an important legacy of the IPY, as is the updated baseline of current permafrost conditions against which future changes may be measured. Within the Northern Hemisphere polar region, ground temperatures are currently being measured in about 575 boreholes in North America, the Nordic region and Russia. These show that in the discontinuous permafrost zone, permafrost temperatures fall within a narrow range, with the mean annual ground temperature (MAGT) at most sites being higher than −2°C. A greater range in MAGT is present within the continuous permafrost zone, from above −1°C at some locations to as low as −15°C. The latest results indicate that the permafrost warming which started two to three decades ago has generally continued into the IPY period. Warming rates are much smaller for permafrost already at temperatures close to 0°C compared with colder permafrost, especially for ice‐rich permafrost where latent heat effects dominate the ground thermal regime. Colder permafrost sites are warming more rapidly. This improved knowledge about the permafrost thermal state and its dynamics is important for multidisciplinary polar research, but also for many of the 4 million people living in the Arctic. In particular, this knowledge is required for designing effective adaptation strategies for the local communities under warmer climatic conditions. Copyright © 2010 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Romanovsky, Vladimir E. Smith, Sharon L. Christiansen, Hanne H. |
spellingShingle |
Romanovsky, Vladimir E. Smith, Sharon L. Christiansen, Hanne H. Permafrost thermal state in the polar Northern Hemisphere during the international polar year 2007–2009: a synthesis |
author_facet |
Romanovsky, Vladimir E. Smith, Sharon L. Christiansen, Hanne H. |
author_sort |
Romanovsky, Vladimir E. |
title |
Permafrost thermal state in the polar Northern Hemisphere during the international polar year 2007–2009: a synthesis |
title_short |
Permafrost thermal state in the polar Northern Hemisphere during the international polar year 2007–2009: a synthesis |
title_full |
Permafrost thermal state in the polar Northern Hemisphere during the international polar year 2007–2009: a synthesis |
title_fullStr |
Permafrost thermal state in the polar Northern Hemisphere during the international polar year 2007–2009: a synthesis |
title_full_unstemmed |
Permafrost thermal state in the polar Northern Hemisphere during the international polar year 2007–2009: a synthesis |
title_sort |
permafrost thermal state in the polar northern hemisphere during the international polar year 2007–2009: a synthesis |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1002/ppp.689 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.689 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.689 |
genre |
Ice International Polar Year IPY permafrost Permafrost and Periglacial Processes |
genre_facet |
Ice International Polar Year IPY permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 21, issue 2, page 106-116 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.689 |
container_title |
Permafrost and Periglacial Processes |
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21 |
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2 |
container_start_page |
106 |
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116 |
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1810449036775260160 |