A permafrost warming in a cooling Antarctica?
The magnitude and even direction of recent Antarctic climate change is still debated because the paucity of long and complete instrumental data records. While along Antarctic Peninsula a strong warming coupled with large retreat of glaciers occurred, in continental Antarctica a cooling was recently...
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ftuninsubriairis:oai:irinsubria.uninsubria.it:11383/1742479 2024-04-14T08:00:10+00:00 A permafrost warming in a cooling Antarctica? GUGLIELMIN, MAURO CANNONE, NICOLETTA Guglielmin, Mauro Cannone, Nicoletta 2012 http://hdl.handle.net/11383/1742479 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000300314500002 volume:111 firstpage:177 lastpage:195 journal:CLIMATIC CHANGE http://hdl.handle.net/11383/1742479 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84856707223 info:eu-repo/semantics/openAccess climate change Antarctica permafrost active layer ecosystems info:eu-repo/semantics/article 2012 ftuninsubriairis 2024-03-21T18:56:13Z The magnitude and even direction of recent Antarctic climate change is still debated because the paucity of long and complete instrumental data records. While along Antarctic Peninsula a strong warming coupled with large retreat of glaciers occurred, in continental Antarctica a cooling was recently detected. Here, the first existing permafrost data set longer than 10 years recorded in continental Antarctica is presented. Since 1997 summer ground surface temperature showed a strong warming trend (0.31°C per year) although the air temperature was almost stable. The summer ground surface temperature increase seemed to be influenced mainly by the increase of the total summer radiation as confirmed also by the increase of the summer thawing degree days. In the same period the active layer exhibited a thickening trend (1 cm per year) comparable with the thickening rates observed in several Arctic locations where air warming occurred. At all the investigated depths permafrost exhibited an increase of mean annual temperature of approximately 0.1°C per year. The dichotomy between active layer thickness and air temperature trends can produce large unexepected and unmodelled impacts on ecosystems and CO2 balance. Article in Journal/Newspaper Active layer thickness Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Climate change permafrost IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) Arctic Antarctic Antarctic Peninsula |
institution |
Open Polar |
collection |
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) |
op_collection_id |
ftuninsubriairis |
language |
unknown |
topic |
climate change Antarctica permafrost active layer ecosystems |
spellingShingle |
climate change Antarctica permafrost active layer ecosystems GUGLIELMIN, MAURO CANNONE, NICOLETTA A permafrost warming in a cooling Antarctica? |
topic_facet |
climate change Antarctica permafrost active layer ecosystems |
description |
The magnitude and even direction of recent Antarctic climate change is still debated because the paucity of long and complete instrumental data records. While along Antarctic Peninsula a strong warming coupled with large retreat of glaciers occurred, in continental Antarctica a cooling was recently detected. Here, the first existing permafrost data set longer than 10 years recorded in continental Antarctica is presented. Since 1997 summer ground surface temperature showed a strong warming trend (0.31°C per year) although the air temperature was almost stable. The summer ground surface temperature increase seemed to be influenced mainly by the increase of the total summer radiation as confirmed also by the increase of the summer thawing degree days. In the same period the active layer exhibited a thickening trend (1 cm per year) comparable with the thickening rates observed in several Arctic locations where air warming occurred. At all the investigated depths permafrost exhibited an increase of mean annual temperature of approximately 0.1°C per year. The dichotomy between active layer thickness and air temperature trends can produce large unexepected and unmodelled impacts on ecosystems and CO2 balance. |
author2 |
Guglielmin, Mauro Cannone, Nicoletta |
format |
Article in Journal/Newspaper |
author |
GUGLIELMIN, MAURO CANNONE, NICOLETTA |
author_facet |
GUGLIELMIN, MAURO CANNONE, NICOLETTA |
author_sort |
GUGLIELMIN, MAURO |
title |
A permafrost warming in a cooling Antarctica? |
title_short |
A permafrost warming in a cooling Antarctica? |
title_full |
A permafrost warming in a cooling Antarctica? |
title_fullStr |
A permafrost warming in a cooling Antarctica? |
title_full_unstemmed |
A permafrost warming in a cooling Antarctica? |
title_sort |
permafrost warming in a cooling antarctica? |
publishDate |
2012 |
url |
http://hdl.handle.net/11383/1742479 |
geographic |
Arctic Antarctic Antarctic Peninsula |
geographic_facet |
Arctic Antarctic Antarctic Peninsula |
genre |
Active layer thickness Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Climate change permafrost |
genre_facet |
Active layer thickness Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Climate change permafrost |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000300314500002 volume:111 firstpage:177 lastpage:195 journal:CLIMATIC CHANGE http://hdl.handle.net/11383/1742479 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84856707223 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1796315189804531712 |