Effects of short-term variability of meteorological variables on soil temperature in permafrost regions

Beer, Christian; Porada, Philipp; Ekici, Altug; Brakebusch, Matthias (2018). Effects of short-term variability of meteorological variables on soil temperature in permafrost regions. The Cryosphere, 12(2), pp. 741-757. Copernicus Publications 10.5194/tc-12-741-2018

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Effects of the short-term temporal variability of meteorological variables on soil temperature in northern high-latitude regions have been investigated. For this, a process-oriented land surface model has been driven using an artificially manipulated climate dataset. Short-term climate variability mainly impacts snow depth, and the thermal diffusivity of lichens and bryophytes. These impacts of climate variability on insulating surface layers together substantially alter the heat exchange between atmosphere and soil. As a result, soil temperature is 0.1 to 0.8 ∘C higher when climate variability is reduced. Earth system models project warming of the Arctic region but also increasing variability of meteorological variables and more often extreme meteorological events. Therefore, our results show that projected future increases in permafrost temperature and active-layer thickness in response to climate change will be lower (i) when taking into account future changes in short-term variability of meteorological variables and (ii) when representing dynamic snow and lichen and bryophyte functions in land surface models.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)

UniBE Contributor:

Ekici, Sait Altug

Subjects:

500 Science > 530 Physics

ISSN:

1994-0424

Publisher:

Copernicus Publications

Language:

English

Submitter:

Doris Rätz

Date Deposited:

17 May 2021 15:02

Last Modified:

17 May 2021 15:02

Publisher DOI:

10.5194/tc-12-741-2018

BORIS DOI:

10.48350/155706

URI:

https://boris.unibe.ch/id/eprint/155706

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