Detecting the signature of permafrost thaw in Arctic rivers
Climate change induced permafrost thaw in the Arctic is mobilizing ancient dissolved organic carbon (DOC) into headwater streams; however, DOC exported from the mouth of major arctic rivers appears predominantly modern. Here we highlight that ancient (>20,000 years B.P.) permafrost DOC is rapidly...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Geophysical Union
2015
|
Subjects: | |
Online Access: | http://eprints.gla.ac.uk/116799/ |
id |
ftuglasgow:oai:eprints.gla.ac.uk:116799 |
---|---|
record_format |
openpolar |
spelling |
ftuglasgow:oai:eprints.gla.ac.uk:116799 2023-05-15T14:26:28+02:00 Detecting the signature of permafrost thaw in Arctic rivers Spencer, Robert G.M. Mann, Paul J. Dittmar, Thorsten Eglinton, Timothy I. Mcintyre, Cameron Holmes, R. Max Zimov, Nikita Stubbins, Aron 2015 http://eprints.gla.ac.uk/116799/ unknown American Geophysical Union Wiley Spencer, R. G.M., Mann, P. J., Dittmar, T., Eglinton, T. I., Mcintyre, C. <http://eprints.gla.ac.uk/view/author/34583.html> , Holmes, R. M., Zimov, N. and Stubbins, A. (2015) Detecting the signature of permafrost thaw in Arctic rivers. Geophysical Research Letters <http://eprints.gla.ac.uk/view/journal_volume/Geophysical_Research_Letters.html>, 42(8), pp. 2830-2835. (doi:10.1002/2015GL063498 <http://dx.doi.org/10.1002/2015GL063498>) Articles PeerReviewed 2015 ftuglasgow https://doi.org/10.1002/2015GL063498 2020-01-10T01:04:34Z Climate change induced permafrost thaw in the Arctic is mobilizing ancient dissolved organic carbon (DOC) into headwater streams; however, DOC exported from the mouth of major arctic rivers appears predominantly modern. Here we highlight that ancient (>20,000 years B.P.) permafrost DOC is rapidly utilized by microbes (~50% DOC loss in <7 days) and that permafrost DOC decay rates (0.12 to 0.19 day−1) exceed those for DOC in a major arctic river (Kolyma: 0.09 day−1). Permafrost DOC exhibited unique molecular signatures, including high levels of aliphatics that were rapidly utilized by microbes. As microbes processed permafrost DOC, its distinctive chemical signatures were degraded and converged toward those of DOC in the Kolyma River. The extreme biolability of permafrost DOC and the rapid loss of its distinct molecular signature may explain the apparent contradiction between observed permafrost DOC release to headwaters and the lack of a permafrost signal in DOC exported via major arctic rivers to the ocean. Article in Journal/Newspaper Arctic Arctic Climate change Detecting the Signature of Permafrost Thaw in Arctic Rivers kolyma river permafrost University of Glasgow: Enlighten - Publications Arctic Kolyma ENVELOPE(161.000,161.000,69.500,69.500) Geophysical Research Letters 42 8 2830 2835 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
description |
Climate change induced permafrost thaw in the Arctic is mobilizing ancient dissolved organic carbon (DOC) into headwater streams; however, DOC exported from the mouth of major arctic rivers appears predominantly modern. Here we highlight that ancient (>20,000 years B.P.) permafrost DOC is rapidly utilized by microbes (~50% DOC loss in <7 days) and that permafrost DOC decay rates (0.12 to 0.19 day−1) exceed those for DOC in a major arctic river (Kolyma: 0.09 day−1). Permafrost DOC exhibited unique molecular signatures, including high levels of aliphatics that were rapidly utilized by microbes. As microbes processed permafrost DOC, its distinctive chemical signatures were degraded and converged toward those of DOC in the Kolyma River. The extreme biolability of permafrost DOC and the rapid loss of its distinct molecular signature may explain the apparent contradiction between observed permafrost DOC release to headwaters and the lack of a permafrost signal in DOC exported via major arctic rivers to the ocean. |
format |
Article in Journal/Newspaper |
author |
Spencer, Robert G.M. Mann, Paul J. Dittmar, Thorsten Eglinton, Timothy I. Mcintyre, Cameron Holmes, R. Max Zimov, Nikita Stubbins, Aron |
spellingShingle |
Spencer, Robert G.M. Mann, Paul J. Dittmar, Thorsten Eglinton, Timothy I. Mcintyre, Cameron Holmes, R. Max Zimov, Nikita Stubbins, Aron Detecting the signature of permafrost thaw in Arctic rivers |
author_facet |
Spencer, Robert G.M. Mann, Paul J. Dittmar, Thorsten Eglinton, Timothy I. Mcintyre, Cameron Holmes, R. Max Zimov, Nikita Stubbins, Aron |
author_sort |
Spencer, Robert G.M. |
title |
Detecting the signature of permafrost thaw in Arctic rivers |
title_short |
Detecting the signature of permafrost thaw in Arctic rivers |
title_full |
Detecting the signature of permafrost thaw in Arctic rivers |
title_fullStr |
Detecting the signature of permafrost thaw in Arctic rivers |
title_full_unstemmed |
Detecting the signature of permafrost thaw in Arctic rivers |
title_sort |
detecting the signature of permafrost thaw in arctic rivers |
publisher |
American Geophysical Union |
publishDate |
2015 |
url |
http://eprints.gla.ac.uk/116799/ |
long_lat |
ENVELOPE(161.000,161.000,69.500,69.500) |
geographic |
Arctic Kolyma |
geographic_facet |
Arctic Kolyma |
genre |
Arctic Arctic Climate change Detecting the Signature of Permafrost Thaw in Arctic Rivers kolyma river permafrost |
genre_facet |
Arctic Arctic Climate change Detecting the Signature of Permafrost Thaw in Arctic Rivers kolyma river permafrost |
op_relation |
Spencer, R. G.M., Mann, P. J., Dittmar, T., Eglinton, T. I., Mcintyre, C. <http://eprints.gla.ac.uk/view/author/34583.html> , Holmes, R. M., Zimov, N. and Stubbins, A. (2015) Detecting the signature of permafrost thaw in Arctic rivers. Geophysical Research Letters <http://eprints.gla.ac.uk/view/journal_volume/Geophysical_Research_Letters.html>, 42(8), pp. 2830-2835. (doi:10.1002/2015GL063498 <http://dx.doi.org/10.1002/2015GL063498>) |
op_doi |
https://doi.org/10.1002/2015GL063498 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
8 |
container_start_page |
2830 |
op_container_end_page |
2835 |
_version_ |
1766299034185629696 |