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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Niedersächsische Staats- und Universitätsbibliothek
2007
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ftgbv:oai:gbv.de:opac-de-7:ppn:525563598 2023-05-15T18:40:33+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 electronic Elektronische Ressource electronic resource remote Online-Ressource (PDF-Datei: 9 S., 287,66 KB) http://webdoc.sub.gwdg.de/pub/med/2007/biomed/2007-teepe.pdf https://doi.org/10.1186/1750-0680-2-2 eng eng Niedersächsische Staats- und Universitätsbibliothek Carbon balance and management--17500680--(DE-601)515824364 634 2007 ftgbv https://doi.org/10.1186/1750-0680-2-2 2016-01-30T08:43:58Z 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 +10ʿC (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 -5ʿC. 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). Systemvoraussetzungen: Acrobat reader Other/Unknown Material Tundra Georg-August-Universität Göttingen: GOEDOC Carbon Balance and Management 2 1 |
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Georg-August-Universität Göttingen: GOEDOC |
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language |
English |
topic |
634 |
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634 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 +10ʿC (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 -5ʿC. 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). Systemvoraussetzungen: Acrobat reader |
author2 |
Kurganova, Irina Teepe, Robert Loftfield, Norman |
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 |
publisher |
Niedersächsische Staats- und Universitätsbibliothek |
publishDate |
2007 |
url |
http://webdoc.sub.gwdg.de/pub/med/2007/biomed/2007-teepe.pdf https://doi.org/10.1186/1750-0680-2-2 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
Carbon balance and management--17500680--(DE-601)515824364 |
op_doi |
https://doi.org/10.1186/1750-0680-2-2 |
container_title |
Carbon Balance and Management |
container_volume |
2 |
container_issue |
1 |
_version_ |
1766229937480531968 |