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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

<a href="/cs/project/LM2015078" target="_blank" >LM2015078: Česká polární výzkumná infrastruktura</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

The Cryosphere

ISSN

1994-0416

e-ISSN

1994-0424

Svazek periodika

14

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

23

Strana od-do

497-519

Kód UT WoS článku

000513070900001

EID výsledku v databázi Scopus

2-s2.0-85079389383