Methane oxidation under ice-cover conditions in Siberian waters
Permafrost thaw affects global climate, the land surface and coastal structures. Under subaquatic conditions, permafrost thaw is often more rapid than on land. The thaw depth below water bodies (taliks) and changes in biogeochemical gradients are difficult to predict. The influence of taliks and bio...
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ftawi:oai:epic.awi.de:48728 2023-05-15T14:24:44+02:00 Methane oxidation under ice-cover conditions in Siberian waters Bussmann, Ingeborg Damm, Ellen Grosse, Guido Overduin, Paul Spangenberg, Ines Triputra, Prayoga Wahyu Fedorova, Irina 2018-10-17 https://epic.awi.de/id/eprint/48728/ https://hdl.handle.net/10013/epic.b84d5c5f-0e62-4a56-ba59-f0491dcf6168 unknown AARI Bussmann, I. orcid:0000-0002-1197-7461 , Damm, E. orcid:0000-0002-1487-1283 , Grosse, G. orcid:0000-0001-5895-2141 , Overduin, P. orcid:0000-0001-9849-4712 , Spangenberg, I. , Triputra, P. W. and Fedorova, I. (2018) Methane oxidation under ice-cover conditions in Siberian waters , 20 years of Terrestrial Research in the Siberian Arctic, St. Petersburg, Russia, 17 October 2018 - 19 October 2018 . hdl:10013/epic.b84d5c5f-0e62-4a56-ba59-f0491dcf6168 EPIC320 years of Terrestrial Research in the Siberian Arctic, St. Petersburg, Russia, 2018-10-17-2018-10-19St. Petersburg, AARI Conference notRev 2018 ftawi 2021-12-24T15:44:25Z Permafrost thaw affects global climate, the land surface and coastal structures. Under subaquatic conditions, permafrost thaw is often more rapid than on land. The thaw depth below water bodies (taliks) and changes in biogeochemical gradients are difficult to predict. The influence of taliks and biogeochemical gradients on the production and release of the greenhouse gases methane and carbon dioxide is not clear yet. Although our research in this region has produced multi-decadal data sets, most of our knowledge on the methane cycle pertains only to the summer. We focus on water bodies in the Lena Delta region, including thermokarst ponds, lakes, lagoons and the marine shoreface. For most of the year, however, ice covers these water bodies, creating a barrier between the water column and the atmosphere, and changing benthic conditions. It is therefore important to assess methane-related processes during the ice-covered season. In spring 2017 we investigated the Lena Delta and Tiksi Bay at the end of winter, while still ice-covered. Thirty ice cores of different water bodies were obtained by Kovacs ice corer. The in situ temperature of the ice cores was measured immediately afterwards. Methane oxidation rates were determined with radio tracer method in melted ice core samples. Analyses of methane concentration and further hydrochemical analyses are on their way. Initial results indicate rather low activities of methane oxidation in the ice cores, but active biological processes in the water below. Conference Object Arctic Ice ice core lena delta permafrost Thermokarst Tiksi Tiksi Bay Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Tiksi ENVELOPE(128.867,128.867,71.633,71.633) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Permafrost thaw affects global climate, the land surface and coastal structures. Under subaquatic conditions, permafrost thaw is often more rapid than on land. The thaw depth below water bodies (taliks) and changes in biogeochemical gradients are difficult to predict. The influence of taliks and biogeochemical gradients on the production and release of the greenhouse gases methane and carbon dioxide is not clear yet. Although our research in this region has produced multi-decadal data sets, most of our knowledge on the methane cycle pertains only to the summer. We focus on water bodies in the Lena Delta region, including thermokarst ponds, lakes, lagoons and the marine shoreface. For most of the year, however, ice covers these water bodies, creating a barrier between the water column and the atmosphere, and changing benthic conditions. It is therefore important to assess methane-related processes during the ice-covered season. In spring 2017 we investigated the Lena Delta and Tiksi Bay at the end of winter, while still ice-covered. Thirty ice cores of different water bodies were obtained by Kovacs ice corer. The in situ temperature of the ice cores was measured immediately afterwards. Methane oxidation rates were determined with radio tracer method in melted ice core samples. Analyses of methane concentration and further hydrochemical analyses are on their way. Initial results indicate rather low activities of methane oxidation in the ice cores, but active biological processes in the water below. |
format |
Conference Object |
author |
Bussmann, Ingeborg Damm, Ellen Grosse, Guido Overduin, Paul Spangenberg, Ines Triputra, Prayoga Wahyu Fedorova, Irina |
spellingShingle |
Bussmann, Ingeborg Damm, Ellen Grosse, Guido Overduin, Paul Spangenberg, Ines Triputra, Prayoga Wahyu Fedorova, Irina Methane oxidation under ice-cover conditions in Siberian waters |
author_facet |
Bussmann, Ingeborg Damm, Ellen Grosse, Guido Overduin, Paul Spangenberg, Ines Triputra, Prayoga Wahyu Fedorova, Irina |
author_sort |
Bussmann, Ingeborg |
title |
Methane oxidation under ice-cover conditions in Siberian waters |
title_short |
Methane oxidation under ice-cover conditions in Siberian waters |
title_full |
Methane oxidation under ice-cover conditions in Siberian waters |
title_fullStr |
Methane oxidation under ice-cover conditions in Siberian waters |
title_full_unstemmed |
Methane oxidation under ice-cover conditions in Siberian waters |
title_sort |
methane oxidation under ice-cover conditions in siberian waters |
publisher |
AARI |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/48728/ https://hdl.handle.net/10013/epic.b84d5c5f-0e62-4a56-ba59-f0491dcf6168 |
long_lat |
ENVELOPE(128.867,128.867,71.633,71.633) |
geographic |
Tiksi |
geographic_facet |
Tiksi |
genre |
Arctic Ice ice core lena delta permafrost Thermokarst Tiksi Tiksi Bay |
genre_facet |
Arctic Ice ice core lena delta permafrost Thermokarst Tiksi Tiksi Bay |
op_source |
EPIC320 years of Terrestrial Research in the Siberian Arctic, St. Petersburg, Russia, 2018-10-17-2018-10-19St. Petersburg, AARI |
op_relation |
Bussmann, I. orcid:0000-0002-1197-7461 , Damm, E. orcid:0000-0002-1487-1283 , Grosse, G. orcid:0000-0001-5895-2141 , Overduin, P. orcid:0000-0001-9849-4712 , Spangenberg, I. , Triputra, P. W. and Fedorova, I. (2018) Methane oxidation under ice-cover conditions in Siberian waters , 20 years of Terrestrial Research in the Siberian Arctic, St. Petersburg, Russia, 17 October 2018 - 19 October 2018 . hdl:10013/epic.b84d5c5f-0e62-4a56-ba59-f0491dcf6168 |
_version_ |
1766297184018366464 |