Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions
The microbial process of methane (CH4) production during the back-freezing of permafrost soils in autumn and the future fate of produced CH4 in the thawing phase of the following spring are not well understood. Long-term CH4 flux studies in the Lena Delta (Siberia) indicate that back-stored CH4 adds...
Published in: | Permafrost and Periglacial Processes |
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Zoological Institute of Russian Academy of Sciences
2003
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Online Access: | https://oceanrep.geomar.de/id/eprint/28402/ https://oceanrep.geomar.de/id/eprint/28402/1/2003_Wagner_etal-Simulation_PerPerProc-14.pdf https://doi.org/10.1002/ppp.468 |
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ftoceanrep:oai:oceanrep.geomar.de:28402 2023-05-15T17:07:31+02:00 Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions Wagner, Dirk Wille, Christian Kobabe, Svenja Pfeiffer, Eva-Maria 2003 text https://oceanrep.geomar.de/id/eprint/28402/ https://oceanrep.geomar.de/id/eprint/28402/1/2003_Wagner_etal-Simulation_PerPerProc-14.pdf https://doi.org/10.1002/ppp.468 en eng Zoological Institute of Russian Academy of Sciences https://oceanrep.geomar.de/id/eprint/28402/1/2003_Wagner_etal-Simulation_PerPerProc-14.pdf Wagner, D., Wille, C., Kobabe, S. and Pfeiffer, E. M. (2003) Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions. Permafrost and Periglacial Processes, 14 (4). pp. 367-374. DOI 10.1002/ppp.468 <https://doi.org/10.1002/ppp.468>. doi:10.1002/ppp.468 cc_by_nc_3.0 Article PeerReviewed 2003 ftoceanrep https://doi.org/10.1002/ppp.468 2023-04-07T15:18:46Z The microbial process of methane (CH4) production during the back-freezing of permafrost soils in autumn and the future fate of produced CH4 in the thawing phase of the following spring are not well understood. Long-term CH4 flux studies in the Lena Delta (Siberia) indicate that back-stored CH4 adds to the emission of newly-produced CH4 at the beginning of the vegetation period. Further field analysis shows that microbial CH4 production already occurs at in situ temperatures of around 1°C in the bottom layer of the soil. Therefore, a permafrost microcosm was developed to simulate the influence of the annual freezing-thawing cycles on the CH4 fluxes in the active layer of permafrost soils. Two cryostats ensure independent freezing and thawing the top and the bottom of the microcosm to simulate different field conditions. The CH4 concentration (Rhizon soil moisture samplers), the soil temperature (film platinum resistance temperature detectors [RTDs]) and the soil water content (time domain reflectometry) are analysed in different depths of the microcosm during the simulation in addition to the concentration of emitted CH4 in the headspace of the microcosm. The data obtained contribute to the understanding of microbial processes and CH4 fluxes in permafrost environments in the autumn and early winter. Article in Journal/Newspaper lena delta permafrost Permafrost and Periglacial Processes Siberia OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Permafrost and Periglacial Processes 14 4 367 374 |
institution |
Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The microbial process of methane (CH4) production during the back-freezing of permafrost soils in autumn and the future fate of produced CH4 in the thawing phase of the following spring are not well understood. Long-term CH4 flux studies in the Lena Delta (Siberia) indicate that back-stored CH4 adds to the emission of newly-produced CH4 at the beginning of the vegetation period. Further field analysis shows that microbial CH4 production already occurs at in situ temperatures of around 1°C in the bottom layer of the soil. Therefore, a permafrost microcosm was developed to simulate the influence of the annual freezing-thawing cycles on the CH4 fluxes in the active layer of permafrost soils. Two cryostats ensure independent freezing and thawing the top and the bottom of the microcosm to simulate different field conditions. The CH4 concentration (Rhizon soil moisture samplers), the soil temperature (film platinum resistance temperature detectors [RTDs]) and the soil water content (time domain reflectometry) are analysed in different depths of the microcosm during the simulation in addition to the concentration of emitted CH4 in the headspace of the microcosm. The data obtained contribute to the understanding of microbial processes and CH4 fluxes in permafrost environments in the autumn and early winter. |
format |
Article in Journal/Newspaper |
author |
Wagner, Dirk Wille, Christian Kobabe, Svenja Pfeiffer, Eva-Maria |
spellingShingle |
Wagner, Dirk Wille, Christian Kobabe, Svenja Pfeiffer, Eva-Maria Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions |
author_facet |
Wagner, Dirk Wille, Christian Kobabe, Svenja Pfeiffer, Eva-Maria |
author_sort |
Wagner, Dirk |
title |
Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions |
title_short |
Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions |
title_full |
Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions |
title_fullStr |
Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions |
title_full_unstemmed |
Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions |
title_sort |
simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions |
publisher |
Zoological Institute of Russian Academy of Sciences |
publishDate |
2003 |
url |
https://oceanrep.geomar.de/id/eprint/28402/ https://oceanrep.geomar.de/id/eprint/28402/1/2003_Wagner_etal-Simulation_PerPerProc-14.pdf https://doi.org/10.1002/ppp.468 |
genre |
lena delta permafrost Permafrost and Periglacial Processes Siberia |
genre_facet |
lena delta permafrost Permafrost and Periglacial Processes Siberia |
op_relation |
https://oceanrep.geomar.de/id/eprint/28402/1/2003_Wagner_etal-Simulation_PerPerProc-14.pdf Wagner, D., Wille, C., Kobabe, S. and Pfeiffer, E. M. (2003) Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions. Permafrost and Periglacial Processes, 14 (4). pp. 367-374. DOI 10.1002/ppp.468 <https://doi.org/10.1002/ppp.468>. doi:10.1002/ppp.468 |
op_rights |
cc_by_nc_3.0 |
op_doi |
https://doi.org/10.1002/ppp.468 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
14 |
container_issue |
4 |
container_start_page |
367 |
op_container_end_page |
374 |
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1766062977501364224 |