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dc.contributor.authorObu, Jaroslaven_NZ
dc.contributor.authorWestermann, Sebastianen_NZ
dc.contributor.authorVieira, Gonçaloen_NZ
dc.contributor.authorAbramov, Andreyen_NZ
dc.contributor.authorBalks, Megan R.en_NZ
dc.contributor.authorBartsch, Annetten_NZ
dc.contributor.authorHrbáček, Filipen_NZ
dc.contributor.authorKääb, Andreasen_NZ
dc.contributor.authorRamos, Miguelen_NZ
dc.date.accessioned2020-08-20T23:24:04Z
dc.date.available2020-08-20T23:24:04Z
dc.date.issued2020en_NZ
dc.identifier.citationObu, J., Westermann, S., Vieira, G., Abramov, A., Balks, M. R., Bartsch, A., … Ramos, M. (2020). Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale. The Cryosphere, 14(2), 497–519. https://doi.org/10.5194/tc-14-497-2020en
dc.identifier.urihttps://hdl.handle.net/10289/13744
dc.description.abstractPermafrost 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.en_NZ
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherCopernicus GmbHen_NZ
dc.rights© Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
dc.titlePan-Antarctic map of near-surface permafrost temperatures at 1 km2 scaleen_NZ
dc.typeJournal Article
dc.identifier.doi10.5194/tc-14-497-2020en_NZ
dc.relation.isPartOfThe Cryosphereen_NZ
pubs.begin-page497
pubs.elements-id256340
pubs.end-page519
pubs.issue2en_NZ
pubs.volume14en_NZ
dc.identifier.eissn1994-0424en_NZ


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