Publication
Active layer and permafrost thermal regimes in the ice-free areas of Antarctica
| Summary: | Ice-free areas occupy <0.5% of Antarctica and are unevenly distributed across the continent. Terrestrial ecosystem dynamics in ice free areas are strongly influenced by permafrost and the associated active layer. These features are the least studied component of the cryosphere in Antarctica, with sparse data from permanent study sites mainly providing information related to the ground thermal regime and active layer thickness (ALT). One of the most important results of the International Polar Year (IPY, 2007/08) was an increase in ground thermal regime monitoring sites, and consequently our knowledge of Antarctic permafrost dynamics. Now, 15 years after the IPY, we provide the first comprehensive summary of the state of permafrost across Antarctica, including the sub-Antarctic Islands, with analyses of spatial and temporal patterns of the dominant external factors (climate, lithology, biota, and hydric regime) on the ground thermal regime and active layer thickness. The mean annual ground temperatures of the active layer and uppermost part of the permafrost in Antarctica remain just below 0 °C in the warmest parts of the Antarctic Peninsula, and were below −20 °C in mountainous regions of the continent. The ALT varies between a few cm in the coldest, mountainous, parts of the Transantarctic Mountains up to >5 m in bedrock sites in the Antarctic Peninsula. The deepest and most variable ALTs (ca. 40 to >500 cm) were found in the Antarctic Peninsula, whereas the maximum ALT generally did not exceed 90 cm in Victoria Land and East Antarctica. Notably, found that the mean annual near-surface temperature follows the latitudinal gradient of −0.9 °C/deg. (R2 = 0.9) and the active layer thickness 3.7 cm/deg. (R2 = 0.64). The continuous permafrost occurs in the vast majority of the ice-free areas in Antarctica. The modelling of temperature on the top of the permafrost indicates also the permafrost presence in South Orkneys and South Georgia. The only areas where deep boreholes and geophysical surveys indicates discontinuous or sporadic permafrost are South Shetlands and Western Antarctic Peninsula. |
|---|---|
| Main Authors: | Hrbáček, Filip |
| Other Authors: | Oliva, Marc; Hansen, Christel; Balks, Megan; O'Neill, Tanya Ann; de Pablo, Miguel Angel; Ponti, Stefano; Ramos, Miguel; Vieira, Gonçalo; Abramov, Andrey; Kaplan Pastíriková, Lucia; Guglielmin, Mauro; Goyanes, Gabriel; Francelino, Marcio Rocha; Schaefer, Carlos; Lacelle, Denis |
| Subject: | Ground thermal regime Active layer thickness Climate change Antarctic ice-free environment Cryosols Gelisols Permafrost |
| Year: | 2023 |
| Country: | Portugal |
| Document type: | article |
| Access type: | restricted access |
| Associated institution: | Universidade de Lisboa |
| Language: | English |
| Origin: | Repositório da Universidade de Lisboa |
| _version_ | 1865920843821875200 |
|---|---|
| author | Hrbáček, Filip |
| author2 | Oliva, Marc Hansen, Christel Balks, Megan O'Neill, Tanya Ann de Pablo, Miguel Angel Ponti, Stefano Ramos, Miguel Vieira, Gonçalo Abramov, Andrey Kaplan Pastíriková, Lucia Guglielmin, Mauro Goyanes, Gabriel Francelino, Marcio Rocha Schaefer, Carlos Lacelle, Denis |
| author2_role | author author author author author author author author author author author author author author author |
| author_facet | Hrbáček, Filip Hrbáček, Filip Oliva, Marc Hansen, Christel Balks, Megan O'Neill, Tanya Ann de Pablo, Miguel Angel Ponti, Stefano Ramos, Miguel Vieira, Gonçalo Abramov, Andrey Kaplan Pastíriková, Lucia Guglielmin, Mauro Goyanes, Gabriel Francelino, Marcio Rocha Schaefer, Carlos Lacelle, Denis Oliva, Marc Hansen, Christel Balks, Megan O'Neill, Tanya Ann de Pablo, Miguel Angel Ponti, Stefano Ramos, Miguel Vieira, Gonçalo Abramov, Andrey Kaplan Pastíriková, Lucia Guglielmin, Mauro Goyanes, Gabriel Francelino, Marcio Rocha Schaefer, Carlos Lacelle, Denis |
| author_role | author |
| contributor_name_str_mv | Repositório Científico de Acesso Aberto da ULisboa |
| country_str | PT |
| creators_json_str | [{\"Person.name\":\"Hrbáček, Filip\"},{\"Person.name\":\"Oliva, Marc\",\"Person.identifier.orcid\":\"0000-0001-6521-6388\"},{\"Person.name\":\"Hansen, Christel\"},{\"Person.name\":\"Balks, Megan\"},{\"Person.name\":\"O'Neill, Tanya Ann\"},{\"Person.name\":\"de Pablo, Miguel Angel\"},{\"Person.name\":\"Ponti, Stefano\"},{\"Person.name\":\"Ramos, Miguel\",\"Person.identifier.orcid\":\"0000-0003-3648-6818\"},{\"Person.name\":\"Vieira, Gonçalo\",\"Person.identifier.orcid\":\"0000-0001-7611-3464\"},{\"Person.name\":\"Abramov, Andrey\"},{\"Person.name\":\"Kaplan Pastíriková, Lucia\"},{\"Person.name\":\"Guglielmin, Mauro\"},{\"Person.name\":\"Goyanes, Gabriel\",\"Person.identifier.orcid\":\"0000-0001-5241-254X\"},{\"Person.name\":\"Francelino, Marcio Rocha\"},{\"Person.name\":\"Schaefer, Carlos\"},{\"Person.name\":\"Lacelle, Denis\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Repositório Científico de Acesso Aberto da ULisboa |
| datacite.creators.creator.creatorName.fl_str_mv | Hrbáček, Filip Oliva, Marc Hansen, Christel Balks, Megan O'Neill, Tanya Ann de Pablo, Miguel Angel Ponti, Stefano Ramos, Miguel Vieira, Gonçalo Abramov, Andrey Kaplan Pastíriková, Lucia Guglielmin, Mauro Goyanes, Gabriel Francelino, Marcio Rocha Schaefer, Carlos Lacelle, Denis |
| datacite.date.Accepted.fl_str_mv | 2023-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2023-07-18T10:54:02Z |
| datacite.date.embargoed.fl_str_mv | 2023-07-18T10:54:02Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | Ground thermal regime Active layer thickness Climate change Antarctic ice-free environment Cryosols Gelisols Permafrost |
| datacite.titles.title.fl_str_mv | Active layer and permafrost thermal regimes in the ice-free areas of Antarctica |
| dc.contributor.none.fl_str_mv | Repositório Científico de Acesso Aberto da ULisboa |
| dc.creator.none.fl_str_mv | Hrbáček, Filip Oliva, Marc Hansen, Christel Balks, Megan O'Neill, Tanya Ann de Pablo, Miguel Angel Ponti, Stefano Ramos, Miguel Vieira, Gonçalo Abramov, Andrey Kaplan Pastíriková, Lucia Guglielmin, Mauro Goyanes, Gabriel Francelino, Marcio Rocha Schaefer, Carlos Lacelle, Denis |
| dc.date.Accepted.fl_str_mv | 2023-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2023-07-18T10:54:02Z |
| dc.date.embargoed.fl_str_mv | 2023-07-18T10:54:02Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10451/58646 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.subject.none.fl_str_mv | Ground thermal regime Active layer thickness Climate change Antarctic ice-free environment Cryosols Gelisols Permafrost |
| dc.title.fl_str_mv | Active layer and permafrost thermal regimes in the ice-free areas of Antarctica |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | Ice-free areas occupy <0.5% of Antarctica and are unevenly distributed across the continent. Terrestrial ecosystem dynamics in ice free areas are strongly influenced by permafrost and the associated active layer. These features are the least studied component of the cryosphere in Antarctica, with sparse data from permanent study sites mainly providing information related to the ground thermal regime and active layer thickness (ALT). One of the most important results of the International Polar Year (IPY, 2007/08) was an increase in ground thermal regime monitoring sites, and consequently our knowledge of Antarctic permafrost dynamics. Now, 15 years after the IPY, we provide the first comprehensive summary of the state of permafrost across Antarctica, including the sub-Antarctic Islands, with analyses of spatial and temporal patterns of the dominant external factors (climate, lithology, biota, and hydric regime) on the ground thermal regime and active layer thickness. The mean annual ground temperatures of the active layer and uppermost part of the permafrost in Antarctica remain just below 0 °C in the warmest parts of the Antarctic Peninsula, and were below −20 °C in mountainous regions of the continent. The ALT varies between a few cm in the coldest, mountainous, parts of the Transantarctic Mountains up to >5 m in bedrock sites in the Antarctic Peninsula. The deepest and most variable ALTs (ca. 40 to >500 cm) were found in the Antarctic Peninsula, whereas the maximum ALT generally did not exceed 90 cm in Victoria Land and East Antarctica. Notably, found that the mean annual near-surface temperature follows the latitudinal gradient of −0.9 °C/deg. (R2 = 0.9) and the active layer thickness 3.7 cm/deg. (R2 = 0.64). The continuous permafrost occurs in the vast majority of the ice-free areas in Antarctica. The modelling of temperature on the top of the permafrost indicates also the permafrost presence in South Orkneys and South Georgia. The only areas where deep boreholes and geophysical surveys indicates discontinuous or sporadic permafrost are South Shetlands and Western Antarctic Peninsula. |
| dirty | 0 |
| eu_rights_str_mv | restrictedAccess |
| format | article |
| fulltext.url.fl_str_mv | https://repositorio.ulisboa.pt/bitstreams/3014be43-25c0-4904-b7fe-132d8911a54c/download |
| id | ul_e06c9dbbbc6f507ed97d2d18dcaeaa55 |
| identifier.url.fl_str_mv | http://hdl.handle.net/10451/58646 |
| instacron_str | ul |
| institution | Universidade de Lisboa |
| instname_str | Universidade de Lisboa |
| language | eng |
| network_acronym_str | ul |
| network_name_str | Repositório da Universidade de Lisboa |
| oai_identifier_str | oai:repositorio.ulisboa.pt:10451/58646 |
| organization_str_mv | urn:organizationAcronym:ul |
| person_str_mv | Hrbáček, Filip Oliva, Marc Oliva, Marc https://www.ciencia-id.pt/5510-AC71-085A 5510-AC71-085A http://orcid.org/0000-0001-6521-6388 0000-0001-6521-6388 Hansen, Christel Balks, Megan O'Neill, Tanya Ann de Pablo, Miguel Angel Ponti, Stefano Ramos, Miguel Ramos, Miguel http://orcid.org/0000-0003-3648-6818 0000-0003-3648-6818 Vieira, Gonçalo Vieira, Gonçalo https://www.ciencia-id.pt/2519-6583-CAEA 2519-6583-CAEA http://orcid.org/0000-0001-7611-3464 0000-0001-7611-3464 Abramov, Andrey Kaplan Pastíriková, Lucia Guglielmin, Mauro Goyanes, Gabriel Goyanes, Gabriel https://www.ciencia-id.pt/8018-A674-1A98 8018-A674-1A98 http://orcid.org/0000-0001-5241-254X 0000-0001-5241-254X Francelino, Marcio Rocha Schaefer, Carlos Lacelle, Denis |
| publishDate | 2023 |
| publisher.none.fl_str_mv | Elsevier |
| reponame_str | Repositório da Universidade de Lisboa |
| repository_id_str | urn:repositoryAcronym:ul |
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| spelling | engElsevierpt_PTIce-free areas occupy <0.5% of Antarctica and are unevenly distributed across the continent. Terrestrial ecosystem dynamics in ice free areas are strongly influenced by permafrost and the associated active layer. These features are the least studied component of the cryosphere in Antarctica, with sparse data from permanent study sites mainly providing information related to the ground thermal regime and active layer thickness (ALT). One of the most important results of the International Polar Year (IPY, 2007/08) was an increase in ground thermal regime monitoring sites, and consequently our knowledge of Antarctic permafrost dynamics. Now, 15 years after the IPY, we provide the first comprehensive summary of the state of permafrost across Antarctica, including the sub-Antarctic Islands, with analyses of spatial and temporal patterns of the dominant external factors (climate, lithology, biota, and hydric regime) on the ground thermal regime and active layer thickness. The mean annual ground temperatures of the active layer and uppermost part of the permafrost in Antarctica remain just below 0 °C in the warmest parts of the Antarctic Peninsula, and were below −20 °C in mountainous regions of the continent. The ALT varies between a few cm in the coldest, mountainous, parts of the Transantarctic Mountains up to >5 m in bedrock sites in the Antarctic Peninsula. The deepest and most variable ALTs (ca. 40 to >500 cm) were found in the Antarctic Peninsula, whereas the maximum ALT generally did not exceed 90 cm in Victoria Land and East Antarctica. Notably, found that the mean annual near-surface temperature follows the latitudinal gradient of −0.9 °C/deg. (R2 = 0.9) and the active layer thickness 3.7 cm/deg. (R2 = 0.64). The continuous permafrost occurs in the vast majority of the ice-free areas in Antarctica. The modelling of temperature on the top of the permafrost indicates also the permafrost presence in South Orkneys and South Georgia. The only areas where deep boreholes and geophysical surveys indicates discontinuous or sporadic permafrost are South Shetlands and Western Antarctic Peninsula.application/pdfpt_PTActive layer and permafrost thermal regimes in the ice-free areas of AntarcticaHrbáček, FilipPersonalOliva, MarcDSpacehttp://dspace.org/items/d416bf65-77f6-488e-b275-5fbb257df6d4DSpacehttp://dspace.org/items/d416bf65-77f6-488e-b275-5fbb257df6d4OlivaMarcCiência IDhttps://www.ciencia-id.pt5510-AC71-085AORCIDhttp://orcid.org0000-0001-6521-6388Researcher IDhttps://www.researcherid.comK-5423-2014Scopus Author IDhttps://www.scopus.com35225198700Hansen, ChristelBalks, MeganO'Neill, Tanya Annde Pablo, Miguel AngelPonti, StefanoPersonalRamos, MiguelDSpacehttp://dspace.org/items/a0544f42-b78e-4fd4-9204-f6acfa4e1e9dDSpacehttp://dspace.org/items/a0544f42-b78e-4fd4-9204-f6acfa4e1e9dRamosMiguelORCIDhttp://orcid.org0000-0003-3648-6818Researcher IDhttps://www.researcherid.comK-2230-2014Scopus Author IDhttps://www.scopus.com8676487200PersonalVieira, GonçaloDSpacehttp://dspace.org/items/7039fbb2-e1f8-4c3e-80f1-603b12d33c1cDSpacehttp://dspace.org/items/7039fbb2-e1f8-4c3e-80f1-603b12d33c1cBrito Guapo Teles VieiraGonçaloCiência IDhttps://www.ciencia-id.pt2519-6583-CAEAORCIDhttp://orcid.org0000-0001-7611-3464Scopus Author IDhttps://www.scopus.com7005863976Abramov, AndreyKaplan Pastíriková, LuciaGuglielmin, MauroPersonalGoyanes, GabrielDSpacehttp://dspace.org/items/c1018504-1700-445d-8130-cdfe9e0ec98cDSpacehttp://dspace.org/items/c1018504-1700-445d-8130-cdfe9e0ec98cGoyanesGabriel AlejandroCiência IDhttps://www.ciencia-id.pt8018-A674-1A98ORCIDhttp://orcid.org0000-0001-5241-254XFrancelino, Marcio RochaSchaefer, CarlosLacelle, DenisHostingInstitutionOrganizationalRepositório Científico de Acesso Aberto da ULisboae-mailmailto:repositorio@reitoria.ulisboa.ptrepositorio@reitoria.ulisboa.ptISSNIsPartOf0012-8252DOIIsPartOf10.1016/j.earscirev.2023.1044582023-07-18T10:54:02Z20232023-01-01T00:00:00ZHandlehttp://hdl.handle.net/10451/58646http://purl.org/coar/access_right/c_16ecrestricted accessGround thermal regimeActive layer thicknessClimate changeAntarctic ice-free environmentCryosolsGelisolsPermafrost9592903 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://repositorio.ulisboa.pt/bitstreams/3014be43-25c0-4904-b7fe-132d8911a54c/downloadEarth-Science Reviews242104458 |
| spellingShingle | Active layer and permafrost thermal regimes in the ice-free areas of Antarctica Active layer and permafrost thermal regimes in the ice-free areas of Antarctica Hrbáček, Filip Ground thermal regime Active layer thickness Climate change Antarctic ice-free environment Cryosols Gelisols Permafrost Hrbáček, Filip Ground thermal regime Active layer thickness Climate change Antarctic ice-free environment Cryosols Gelisols Permafrost |
| status | SINGLETON |
| subject.fl_str_mv | Ground thermal regime Active layer thickness Climate change Antarctic ice-free environment Cryosols Gelisols Permafrost |
| title | Active layer and permafrost thermal regimes in the ice-free areas of Antarctica |
| title_full | Active layer and permafrost thermal regimes in the ice-free areas of Antarctica |
| title_fullStr | Active layer and permafrost thermal regimes in the ice-free areas of Antarctica Active layer and permafrost thermal regimes in the ice-free areas of Antarctica |
| title_full_unstemmed | Active layer and permafrost thermal regimes in the ice-free areas of Antarctica Active layer and permafrost thermal regimes in the ice-free areas of Antarctica |
| title_short | Active layer and permafrost thermal regimes in the ice-free areas of Antarctica |
| title_sort | Active layer and permafrost thermal regimes in the ice-free areas of Antarctica |
| topic | Ground thermal regime Active layer thickness Climate change Antarctic ice-free environment Cryosols Gelisols Permafrost |
| topic_facet | Ground thermal regime Active layer thickness Climate change Antarctic ice-free environment Cryosols Gelisols Permafrost |
| url | http://hdl.handle.net/10451/58646 |
| visible | 1 |