Soil and incubation data of permafrost-affected soils of the northeast Siberian polygonal tundra
The large amounts of soil organic matter (SOM) in permafrost-affected soils are prone to increased microbial decomposition in a warming climate. The environmental parameters regulating the production of carbon dioxide (CO2) and methane (CH4), however, are insufficiently understood to confidently pre...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.864866 2024-09-15T18:01:44+00:00 Soil and incubation data of permafrost-affected soils of the northeast Siberian polygonal tundra Walz, Josefine MEDIAN LATITUDE: 72.373701 * MEDIAN LONGITUDE: 126.492590 * SOUTH-BOUND LATITUDE: 72.371800 * WEST-BOUND LONGITUDE: 126.488840 * NORTH-BOUND LATITUDE: 72.374990 * EAST-BOUND LONGITUDE: 126.498660 2016 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.864866 https://doi.org/10.1594/PANGAEA.864866 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.864866 https://doi.org/10.1594/PANGAEA.864866 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess University of Hamburg, Germany Supplement to: Walz, Josefine; Knoblauch, Christian; Böhme, Luise; Pfeiffer, Eva-Maria (2017): Regulation of soil organic matter decomposition in permafrost-affected Siberian tundra soils - Impact of oxygen availability, freezing and thawing, temperature, and labile organic matter. Soil Biology and Biochemistry, 110, 34-43, https://doi.org/10.1016/j.soilbio.2017.03.001 active layer carbon dioxide carbon isotope Methane nitrogen organic carbon permafrost Soil Horizons/Profile dataset publication series 2016 ftpangaea https://doi.org/10.1594/PANGAEA.86486610.1016/j.soilbio.2017.03.001 2024-07-24T02:31:21Z The large amounts of soil organic matter (SOM) in permafrost-affected soils are prone to increased microbial decomposition in a warming climate. The environmental parameters regulating the production of carbon dioxide (CO2) and methane (CH4), however, are insufficiently understood to confidently predict the feedback of thawing permafrost to global warming. Therefore, the effects of oxygen availability, freezing and thawing, temperature, and labile organic matter (OM) additions on greenhouse gas production were studied in northeast Siberian polygonal tundra soils, including the seasonally thawed active layer and upper perennially frozen permafrost. Soils were incubated at constant temperatures of 1 °C, 4 °C, or 8 °C for up to 150 days. CO2 production in surface layers was three times higher than in the deeper soil. Under anaerobic conditions, SOM decomposition was 2-6 times lower than under aerobic conditions and more CO2 than CH4 was produced. CH4 contributed less than 2% to anaerobic decomposition in thawed permafrost but more than 20% in the active layer. A freeze-thaw cycle caused a short-lived pulse of CO2 production directly after re-thawing. Q10 values, calculated via the equal-carbon method, increased with soil depth from 3.4 ± 1.6 in surface layers to 6.1 ± 2.8 in the permafrost. The addition of plant-derived labile OM (13C-labelled Carex aquatilis leaves) resulted in an increase in SOM decomposition only in permafrost (positive priming). The current results indicate that the decomposition of permafrost SOM will be more strongly influenced by rising temperatures and the availability of labile OM than active layer material. The obtained data can be used to inform process-based models to improve simulations of greenhouse gas production potentials from thawing permafrost landscapes. Other/Unknown Material Carex aquatilis permafrost Tundra PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(126.488840,126.498660,72.374990,72.371800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
active layer carbon dioxide carbon isotope Methane nitrogen organic carbon permafrost Soil Horizons/Profile |
spellingShingle |
active layer carbon dioxide carbon isotope Methane nitrogen organic carbon permafrost Soil Horizons/Profile Walz, Josefine Soil and incubation data of permafrost-affected soils of the northeast Siberian polygonal tundra |
topic_facet |
active layer carbon dioxide carbon isotope Methane nitrogen organic carbon permafrost Soil Horizons/Profile |
description |
The large amounts of soil organic matter (SOM) in permafrost-affected soils are prone to increased microbial decomposition in a warming climate. The environmental parameters regulating the production of carbon dioxide (CO2) and methane (CH4), however, are insufficiently understood to confidently predict the feedback of thawing permafrost to global warming. Therefore, the effects of oxygen availability, freezing and thawing, temperature, and labile organic matter (OM) additions on greenhouse gas production were studied in northeast Siberian polygonal tundra soils, including the seasonally thawed active layer and upper perennially frozen permafrost. Soils were incubated at constant temperatures of 1 °C, 4 °C, or 8 °C for up to 150 days. CO2 production in surface layers was three times higher than in the deeper soil. Under anaerobic conditions, SOM decomposition was 2-6 times lower than under aerobic conditions and more CO2 than CH4 was produced. CH4 contributed less than 2% to anaerobic decomposition in thawed permafrost but more than 20% in the active layer. A freeze-thaw cycle caused a short-lived pulse of CO2 production directly after re-thawing. Q10 values, calculated via the equal-carbon method, increased with soil depth from 3.4 ± 1.6 in surface layers to 6.1 ± 2.8 in the permafrost. The addition of plant-derived labile OM (13C-labelled Carex aquatilis leaves) resulted in an increase in SOM decomposition only in permafrost (positive priming). The current results indicate that the decomposition of permafrost SOM will be more strongly influenced by rising temperatures and the availability of labile OM than active layer material. The obtained data can be used to inform process-based models to improve simulations of greenhouse gas production potentials from thawing permafrost landscapes. |
format |
Other/Unknown Material |
author |
Walz, Josefine |
author_facet |
Walz, Josefine |
author_sort |
Walz, Josefine |
title |
Soil and incubation data of permafrost-affected soils of the northeast Siberian polygonal tundra |
title_short |
Soil and incubation data of permafrost-affected soils of the northeast Siberian polygonal tundra |
title_full |
Soil and incubation data of permafrost-affected soils of the northeast Siberian polygonal tundra |
title_fullStr |
Soil and incubation data of permafrost-affected soils of the northeast Siberian polygonal tundra |
title_full_unstemmed |
Soil and incubation data of permafrost-affected soils of the northeast Siberian polygonal tundra |
title_sort |
soil and incubation data of permafrost-affected soils of the northeast siberian polygonal tundra |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.864866 https://doi.org/10.1594/PANGAEA.864866 |
op_coverage |
MEDIAN LATITUDE: 72.373701 * MEDIAN LONGITUDE: 126.492590 * SOUTH-BOUND LATITUDE: 72.371800 * WEST-BOUND LONGITUDE: 126.488840 * NORTH-BOUND LATITUDE: 72.374990 * EAST-BOUND LONGITUDE: 126.498660 |
long_lat |
ENVELOPE(126.488840,126.498660,72.374990,72.371800) |
genre |
Carex aquatilis permafrost Tundra |
genre_facet |
Carex aquatilis permafrost Tundra |
op_source |
University of Hamburg, Germany Supplement to: Walz, Josefine; Knoblauch, Christian; Böhme, Luise; Pfeiffer, Eva-Maria (2017): Regulation of soil organic matter decomposition in permafrost-affected Siberian tundra soils - Impact of oxygen availability, freezing and thawing, temperature, and labile organic matter. Soil Biology and Biochemistry, 110, 34-43, https://doi.org/10.1016/j.soilbio.2017.03.001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.864866 https://doi.org/10.1594/PANGAEA.864866 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.86486610.1016/j.soilbio.2017.03.001 |
_version_ |
1810438813880680448 |