Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Thermal conductivity of firn at Lomonosovfonna, Svalbard, derived from subsurface temperature measurements
Uppsala universitet, Luft-, vatten och landskapslära.ORCID iD: 0000-0003-4785-4532
Uppsala universitet, Avdelningen för beräkningsvetenskap.ORCID iD: 0000-0001-9171-6714
Uppsala universitet, Avdelningen för beräkningsvetenskap.ORCID iD: 0000-0003-2143-3078
Uppsala universitet, Luft-, vatten och landskapslära.ORCID iD: 0000-0001-6851-1673
Show others and affiliations
Responsible organisation
2019 (English)In: The Cryosphere, ISSN 1994-0416, E-ISSN 1994-0424, Vol. 13, p. 1843-1859Article in journal (Refereed) Published
Abstract [en]

Accurate description of snow and firn processes is necessary for estimating the fraction of glacier surface melt that contributes to runoff. Most processes in snow and firn are to a great extent controlled by the temperature therein and in the absence of liquid water, the temperature evolution is dominated by the conductive heat exchange. The latter is controlled by the effective thermal conductivity k. Here we reconstruct the effective thermal conductivity of firn at Lomonosovfonna, Svalbard, using an optimization routine minimizing the misfit between simulated and measured subsurface temperatures and densities. The optimized k* values in the range from 0.2 to 1.6 W (m K)−1 increase downwards and over time. The results are supported by uncertainty quantification experiments, according to which k* is most sensitive to systematic errors in empirical temperature values and their estimated depths, particularly in the lower part of the vertical profile. Compared to commonly used density-based parameterizations, our k values are consistently larger, suggesting a faster conductive heat exchange in firn.

Place, publisher, year, edition, pages
2019. Vol. 13, p. 1843-1859
National Category
Physical Geography
Research subject
SIOS
Identifiers
URN: urn:nbn:se:polar:diva-8298DOI: 10.5194/tc-13-1843-2019ISI: 000474653300002OAI: oai:DiVA.org:polar-8298DiVA, id: diva2:1384594
Available from: 2019-07-09 Created: 2020-01-10 Last updated: 2021-05-03Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textFulltext

Search in DiVA

By author/editor
Marchenko, SergeyCheng, GongLötstedt, PerPohjola, VeijoPettersson, Rickardvan Pelt, Ward
In the same journal
The Cryosphere
Physical Geography

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 75 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf