dc.date.accessioned | 2020-11-17T19:53:11Z | |
dc.date.available | 2020-11-17T19:53:11Z | |
dc.date.created | 2020-02-19T16:02:35Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Obu, Jaroslav Westermann, Sebastian Vieira, Gonçalo Abramov, Andrey Balks, Megan Ruby Bartsch, Annett Hrbáček, Filip Kääb, Andreas Ramos, Miguel . Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale. The Cryosphere. 2020, 14(2), 497-519 | |
dc.identifier.uri | http://hdl.handle.net/10852/81067 | |
dc.description.abstract | Permafrost is present within almost all of the Antarctic's ice-free areas, but little is known about spatial variations in permafrost temperatures except for a few areas with established ground temperature measurements. We modelled a temperature at the top of the permafrost (TTOP) for all the ice-free areas of the Antarctic mainland and Antarctic islands at 1 km2 resolution during 2000–2017. The model was driven by remotely sensed land surface temperatures and downscaled ERA-Interim climate reanalysis data, and subgrid permafrost variability was simulated by variable snow cover. The results were validated against in situ-measured ground temperatures from 40 permafrost boreholes, and the resulting root-mean-square error was 1.9 ∘C. The lowest near-surface permafrost temperature of −36 ∘C was modelled at Mount Markham in the Queen Elizabeth Range in the Transantarctic Mountains. This is the lowest permafrost temperature on Earth, according to global-scale modelling results. The temperatures were most commonly modelled between −23 and −18 ∘C for mountainous areas rising above the Antarctic Ice Sheet and between −14 and −8 ∘C for coastal areas. The model performance was good where snow conditions were modelled realistically, but errors of up to 4 ∘C occurred at sites with strong wind-driven redistribution of snow. | |
dc.language | EN | |
dc.publisher | Copernicus Publications under license by EGU – European Geosciences Union GmbH | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale | |
dc.type | Journal article | |
dc.creator.author | Obu, Jaroslav | |
dc.creator.author | Westermann, Sebastian | |
dc.creator.author | Vieira, Gonçalo | |
dc.creator.author | Abramov, Andrey | |
dc.creator.author | Balks, Megan Ruby | |
dc.creator.author | Bartsch, Annett | |
dc.creator.author | Hrbáček, Filip | |
dc.creator.author | Kääb, Andreas | |
dc.creator.author | Ramos, Miguel | |
cristin.unitcode | 185,15,22,0 | |
cristin.unitname | Institutt for geofag | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 1795883 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=14&rft.spage=497&rft.date=2020 | |
dc.identifier.jtitle | The Cryosphere | |
dc.identifier.volume | 14 | |
dc.identifier.issue | 2 | |
dc.identifier.startpage | 497 | |
dc.identifier.endpage | 519 | |
dc.identifier.doi | https://doi.org/10.5194/tc-14-497-2020 | |
dc.identifier.urn | URN:NBN:no-84160 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 1994-0416 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/81067/2/tc-14-497-2020.pdf | |
dc.type.version | PublishedVersion | |