Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments
Organic carbon (OC) burial is an important process influencing atmospheric CO2 concentration and global climate change; therefore it is essential to obtain information on the factors determining its preservation. The Southern Ocean (SO) is believed to play an important role in sequestering CO2 from...
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ftawi:oai:epic.awi.de:30790 2023-05-15T18:24:50+02:00 Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments Kupinska, Monika Sachs, Oliver Sauter, Eberhard J. Zonneveld, Karin A.F. 2012-07 https://epic.awi.de/id/eprint/30790/ https://hdl.handle.net/10013/epic.39698 unknown Elsevier Kupinska, M. , Sachs, O. , Sauter, E. J. orcid:0000-0001-7954-952X and Zonneveld, K. A. (2012) Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments , Quaternary Research, 78 (1), pp. 130-138 . doi:10.1016/j.yqres.2012.04.001 <https://doi.org/10.1016/j.yqres.2012.04.001> , hdl:10013/epic.39698 EPIC3Quaternary Research, Elsevier, 78(1), pp. 130-138, ISSN: 0033-5896 Article isiRev 2012 ftawi https://doi.org/10.1016/j.yqres.2012.04.001 2021-12-24T15:37:49Z Organic carbon (OC) burial is an important process influencing atmospheric CO2 concentration and global climate change; therefore it is essential to obtain information on the factors determining its preservation. The Southern Ocean (SO) is believed to play an important role in sequestering CO2 from the atmosphere via burial of OC. Here we investigate the degradation of organic-walled dinoflagellate cysts (dinocysts) in two short cores from the SO to obtain information on the factors influencing OC preservation. On the basis of the calculated degradation index kt, we conclude that both cores are affected by species-selective aerobic degradation of dinocysts. Further, we calculate a degradation constant k using oxygen exposure time derived from the ages of our cores. The constant k displays a strong relationship with pore-water O2, suggesting that decomposition of OC is dependent on both the bottom- and pore-water O2 concentrations. Article in Journal/Newspaper Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Southern Ocean Quaternary Research 78 1 130 138 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Organic carbon (OC) burial is an important process influencing atmospheric CO2 concentration and global climate change; therefore it is essential to obtain information on the factors determining its preservation. The Southern Ocean (SO) is believed to play an important role in sequestering CO2 from the atmosphere via burial of OC. Here we investigate the degradation of organic-walled dinoflagellate cysts (dinocysts) in two short cores from the SO to obtain information on the factors influencing OC preservation. On the basis of the calculated degradation index kt, we conclude that both cores are affected by species-selective aerobic degradation of dinocysts. Further, we calculate a degradation constant k using oxygen exposure time derived from the ages of our cores. The constant k displays a strong relationship with pore-water O2, suggesting that decomposition of OC is dependent on both the bottom- and pore-water O2 concentrations. |
format |
Article in Journal/Newspaper |
author |
Kupinska, Monika Sachs, Oliver Sauter, Eberhard J. Zonneveld, Karin A.F. |
spellingShingle |
Kupinska, Monika Sachs, Oliver Sauter, Eberhard J. Zonneveld, Karin A.F. Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments |
author_facet |
Kupinska, Monika Sachs, Oliver Sauter, Eberhard J. Zonneveld, Karin A.F. |
author_sort |
Kupinska, Monika |
title |
Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments |
title_short |
Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments |
title_full |
Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments |
title_fullStr |
Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments |
title_full_unstemmed |
Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments |
title_sort |
aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in southern ocean sediments |
publisher |
Elsevier |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/30790/ https://hdl.handle.net/10013/epic.39698 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3Quaternary Research, Elsevier, 78(1), pp. 130-138, ISSN: 0033-5896 |
op_relation |
Kupinska, M. , Sachs, O. , Sauter, E. J. orcid:0000-0001-7954-952X and Zonneveld, K. A. (2012) Aerobic degradation of organic carbon inferred from dinoflagellate cyst decomposition in Southern Ocean sediments , Quaternary Research, 78 (1), pp. 130-138 . doi:10.1016/j.yqres.2012.04.001 <https://doi.org/10.1016/j.yqres.2012.04.001> , hdl:10013/epic.39698 |
op_doi |
https://doi.org/10.1016/j.yqres.2012.04.001 |
container_title |
Quaternary Research |
container_volume |
78 |
container_issue |
1 |
container_start_page |
130 |
op_container_end_page |
138 |
_version_ |
1766205768878522368 |