Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use
Background: The repeated freeze-thaw events during cold season, freezing of soils in autumn and thawing in spring are typical for the tundra, boreal, and temperate soils. The thawing of soils during winter-summer transitions induces the release of decomposable organic carbon and acceleration of soil...
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ftsubgoettingen:oai:goescholar:1/4386 2023-05-15T18:40:32+02:00 Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use Kurganova, Irina Teepe, Robert Loftfield, Norman 2007 application/pdf http://resolver.sub.uni-goettingen.de/purl?gs-1/4386 https://doi.org/10.1186/1750-0680-2-2 eng eng 1750-0680 http://resolver.sub.uni-goettingen.de/purl?gs-1/4386 Carbon balance and management, Vol. 2.2007, 2, p. 1-9 doi:10.1186/1750-0680-2-2 525563598 openAccess http://goedoc.uni-goettingen.de/goescholar/License_Goedoc_2009_03.txt 634 journalArticle publishedVersion 2007 ftsubgoettingen https://doi.org/10.1186/1750-0680-2-2 2022-11-02T09:27:29Z Background: The repeated freeze-thaw events during cold season, freezing of soils in autumn and thawing in spring are typical for the tundra, boreal, and temperate soils. The thawing of soils during winter-summer transitions induces the release of decomposable organic carbon and acceleration of soil respiration. The winter-spring fluxes of CO2 from permanently and seasonally frozen soils are essential part of annual carbon budget varying from 5 to 50%. The mechanisms of the freeze-thaw activation are not absolutely clear and need clarifying. We investigated the effect of repeated freezing-thawing events on CO2 emission from intact arable and forest soils (Luvisols, loamy silt; Central Germany) at different moisture (65% and 100% of WHC). Results: Due to the measurement of the CO2 flux in two hours intervals, the dynamics of CO2 emission during freezing-thawing events was described in a detailed way. At +10°C (initial level) in soils investigated, carbon dioxide emission varied between 7.4 to 43.8 mg C m-2h-1 depending on land use and moisture. CO2 flux from the totally frozen soil never reached zero and amounted to 5 to 20% of the initial level, indicating that microbial community was still active at -5°C. Significant burst of CO2 emission (1.21.7-fold increase depending on moisture and land use) was observed during thawing. There was close linear correlation between CO2 emission and soil temperature (R2 = 0.860.97, P < 0.001). peerReviewed Article in Journal/Newspaper Tundra Georg-August-Universität Göttingen: GoeScholar Carbon Balance and Management 2 1 |
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Georg-August-Universität Göttingen: GoeScholar |
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language |
English |
topic |
634 |
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634 Kurganova, Irina Teepe, Robert Loftfield, Norman Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use |
topic_facet |
634 |
description |
Background: The repeated freeze-thaw events during cold season, freezing of soils in autumn and thawing in spring are typical for the tundra, boreal, and temperate soils. The thawing of soils during winter-summer transitions induces the release of decomposable organic carbon and acceleration of soil respiration. The winter-spring fluxes of CO2 from permanently and seasonally frozen soils are essential part of annual carbon budget varying from 5 to 50%. The mechanisms of the freeze-thaw activation are not absolutely clear and need clarifying. We investigated the effect of repeated freezing-thawing events on CO2 emission from intact arable and forest soils (Luvisols, loamy silt; Central Germany) at different moisture (65% and 100% of WHC). Results: Due to the measurement of the CO2 flux in two hours intervals, the dynamics of CO2 emission during freezing-thawing events was described in a detailed way. At +10°C (initial level) in soils investigated, carbon dioxide emission varied between 7.4 to 43.8 mg C m-2h-1 depending on land use and moisture. CO2 flux from the totally frozen soil never reached zero and amounted to 5 to 20% of the initial level, indicating that microbial community was still active at -5°C. Significant burst of CO2 emission (1.21.7-fold increase depending on moisture and land use) was observed during thawing. There was close linear correlation between CO2 emission and soil temperature (R2 = 0.860.97, P < 0.001). peerReviewed |
format |
Article in Journal/Newspaper |
author |
Kurganova, Irina Teepe, Robert Loftfield, Norman |
author_facet |
Kurganova, Irina Teepe, Robert Loftfield, Norman |
author_sort |
Kurganova, Irina |
title |
Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use |
title_short |
Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use |
title_full |
Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use |
title_fullStr |
Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use |
title_full_unstemmed |
Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use |
title_sort |
influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use |
publishDate |
2007 |
url |
http://resolver.sub.uni-goettingen.de/purl?gs-1/4386 https://doi.org/10.1186/1750-0680-2-2 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
1750-0680 http://resolver.sub.uni-goettingen.de/purl?gs-1/4386 Carbon balance and management, Vol. 2.2007, 2, p. 1-9 doi:10.1186/1750-0680-2-2 525563598 |
op_rights |
openAccess http://goedoc.uni-goettingen.de/goescholar/License_Goedoc_2009_03.txt |
op_doi |
https://doi.org/10.1186/1750-0680-2-2 |
container_title |
Carbon Balance and Management |
container_volume |
2 |
container_issue |
1 |
_version_ |
1766229917741088768 |