Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00115673" target="_blank" >RIV/00216224:14310/20:00115673 - isvavai.cz</a>

Result on the web

<a href="https://www.the-cryosphere.net/14/497/2020/" target="_blank" >https://www.the-cryosphere.net/14/497/2020/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/tc-14-497-2020" target="_blank" >10.5194/tc-14-497-2020</a>

Result language

angličtina

Original language name

Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale

Original language description

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 km(2) 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 degrees C. The lowest near-surface permafrost temperature of -36 degrees 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 degrees C for mountainous areas rising above the Antarctic Ice Sheet and between -14 and -8 degrees C for coastal areas. The model performance was good where snow conditions were modelled realistically, but errors of up to 4 degrees C occurred at sites with strong wind-driven redistribution of snow.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10508 - Physical geography

Project

<a href="/en/project/LM2015078" target="_blank" >LM2015078: Czech Polar Research Infrastructure</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

The Cryosphere

ISSN

1994-0416

e-ISSN

1994-0424

Volume of the periodical

14

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

23

Pages from-to

497-519

UT code for WoS article

000513070900001

EID of the result in the Scopus database

2-s2.0-85079389383