The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean
Methane sources and sinks in the Arctic are poorly quantified. In particular, methane emissions from the Arctic Ocean and the potential sink capacity are still under debate. In this context sea ice impact on and the intense cycling of methane between sea ice and Polar surface water (PSW) becomes piv...
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ftoceanrep:oai:oceanrep.geomar.de:42284 2023-06-11T04:07:41+02:00 The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean Damm, Ellen Bauch, Dorothea Krumpen, T. Rabe, Benjamin Korhonen, M. Vinogradova, E. Uhlig, C. 2018-03-14 text https://oceanrep.geomar.de/id/eprint/42284/ https://oceanrep.geomar.de/id/eprint/42284/1/s41598-018-22801-z.pdf https://doi.org/10.1038/s41598-018-22801-z en eng Nature Research https://oceanrep.geomar.de/id/eprint/42284/1/s41598-018-22801-z.pdf Damm, E., Bauch, D. , Krumpen, T., Rabe, B., Korhonen, M., Vinogradova, E. and Uhlig, C. (2018) The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean. Open Access Scientific Reports, 8 (Article number 4515). DOI 10.1038/s41598-018-22801-z <https://doi.org/10.1038/s41598-018-22801-z>. doi:10.1038/s41598-018-22801-z cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.1038/s41598-018-22801-z 2023-05-07T23:17:52Z Methane sources and sinks in the Arctic are poorly quantified. In particular, methane emissions from the Arctic Ocean and the potential sink capacity are still under debate. In this context sea ice impact on and the intense cycling of methane between sea ice and Polar surface water (PSW) becomes pivotal. We report on methane super- and under-saturation in PSW in the Eurasian Basin (EB), strongly linked to sea ice-ocean interactions. In the southern EB under-saturation in PSW is caused by both inflow of warm Atlantic water and short-time contact with sea ice. By comparison in the northern EB long-time sea ice-PSW contact triggered by freezing and melting events induces a methane excess. We reveal the Ttranspolar Drift Stream as crucial for methane transport and show that inter-annual shifts in sea ice drift patterns generate inter-annually patchy methane excess in PSW. Using backward trajectories combined with δ18O signatures of sea ice cores we determine the sea ice source regions to be in the Laptev Sea Polynyas and the off shelf regime in 2011 and 2015, respectively. We denote the Transpolar Drift regime as decisive for the fate of methane released on the Siberian shelves. Article in Journal/Newspaper Arctic Arctic Arctic Ocean laptev Laptev Sea Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Laptev Sea Scientific Reports 8 1 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Methane sources and sinks in the Arctic are poorly quantified. In particular, methane emissions from the Arctic Ocean and the potential sink capacity are still under debate. In this context sea ice impact on and the intense cycling of methane between sea ice and Polar surface water (PSW) becomes pivotal. We report on methane super- and under-saturation in PSW in the Eurasian Basin (EB), strongly linked to sea ice-ocean interactions. In the southern EB under-saturation in PSW is caused by both inflow of warm Atlantic water and short-time contact with sea ice. By comparison in the northern EB long-time sea ice-PSW contact triggered by freezing and melting events induces a methane excess. We reveal the Ttranspolar Drift Stream as crucial for methane transport and show that inter-annual shifts in sea ice drift patterns generate inter-annually patchy methane excess in PSW. Using backward trajectories combined with δ18O signatures of sea ice cores we determine the sea ice source regions to be in the Laptev Sea Polynyas and the off shelf regime in 2011 and 2015, respectively. We denote the Transpolar Drift regime as decisive for the fate of methane released on the Siberian shelves. |
format |
Article in Journal/Newspaper |
author |
Damm, Ellen Bauch, Dorothea Krumpen, T. Rabe, Benjamin Korhonen, M. Vinogradova, E. Uhlig, C. |
spellingShingle |
Damm, Ellen Bauch, Dorothea Krumpen, T. Rabe, Benjamin Korhonen, M. Vinogradova, E. Uhlig, C. The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean |
author_facet |
Damm, Ellen Bauch, Dorothea Krumpen, T. Rabe, Benjamin Korhonen, M. Vinogradova, E. Uhlig, C. |
author_sort |
Damm, Ellen |
title |
The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean |
title_short |
The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean |
title_full |
The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean |
title_fullStr |
The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean |
title_full_unstemmed |
The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean |
title_sort |
transpolar drift conveys methane from the siberian shelf to the central arctic ocean |
publisher |
Nature Research |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/42284/ https://oceanrep.geomar.de/id/eprint/42284/1/s41598-018-22801-z.pdf https://doi.org/10.1038/s41598-018-22801-z |
geographic |
Arctic Arctic Ocean Laptev Sea |
geographic_facet |
Arctic Arctic Ocean Laptev Sea |
genre |
Arctic Arctic Arctic Ocean laptev Laptev Sea Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean laptev Laptev Sea Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/42284/1/s41598-018-22801-z.pdf Damm, E., Bauch, D. , Krumpen, T., Rabe, B., Korhonen, M., Vinogradova, E. and Uhlig, C. (2018) The Transpolar Drift conveys methane from the Siberian Shelf to the central Arctic Ocean. Open Access Scientific Reports, 8 (Article number 4515). DOI 10.1038/s41598-018-22801-z <https://doi.org/10.1038/s41598-018-22801-z>. doi:10.1038/s41598-018-22801-z |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41598-018-22801-z |
container_title |
Scientific Reports |
container_volume |
8 |
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1 |
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1768380833907867648 |