气候变化领域集成服务门户(CCPortal): Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale

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DOI	10.5194/tc-14-497-2020
	Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale
	Obu J.; Westermann S.; Vieira G.; Abramov A.; Ruby Balks M.; Bartsch A.; Hrbáček F.; Kääb A.; Ramos M.
发表日期	2020
ISSN	19940416
起始页码	497
结束页码	519
卷号	14 期号:2
英文摘要	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. © 2020 SPIE. All rights reserved.
英文关键词	coastal zone; land surface; model validation; mountain region; performance assessment; permafrost; snow cover; Antarctic Ice Sheet; Antarctica; Canada; Elizabeth; Markham; New Jersey; Ontario [Canada]; Transantarctic Mountains; United States
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202172
作者单位	Department of Geosciences, University of Oslo, Oslo Sem Sælands vei 1, Oslo, 0371, Norway; Centre for Geographical Studies, Institute of Geography and Spatial Planning, University of Lisbon, R. Branca Edmée Marques, Lisbon, 1600-276, Portugal; Institute of Physicochemical and Biological Problems in Soil Science, Russian Academy of Sciences, Pushchino, Russian Federation; Department of Earth and Ocean Sciences, University of Waikato, Private Bag 3105, Hamilton, New Zealand; Zentralanstalt für Meteorologie und Geodynamik, Hohe Warte 39, Vienna, Austria; Department of Geography, Masaryk University, KotláÅ™ská 2, Brno, 61137, Czech Republic; Department of Physics and Mathematics, University of Alcalá, Campus Universitario, Alcalá de Henares, Madrid, 28805, Spain; B.geos GmbH, Vienna Industriestraße 1, Korneuburg, 2100, Austria
推荐引用方式 GB/T 7714	Obu J.,Westermann S.,Vieira G.,et al. Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale[J],2020,14(2).
APA	Obu J..,Westermann S..,Vieira G..,Abramov A..,Ruby Balks M..,...&Ramos M..(2020).Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale.Cryosphere,14(2).
MLA	Obu J.,et al."Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale".Cryosphere 14.2(2020).