Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw
Methane (CH 4 ) release to the atmosphere from thawing permafrost contributes significantly to global CH 4 emissions. However, constraining the effects of thaw that control the production and emission of CH 4 is needed to anticipate future Arctic emissions. Here are presented robust rate measurement...
Published in: | Global Change Biology |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2022
|
Subjects: | |
Online Access: | https://pure.au.dk/portal/da/publications/methane-production-controls-in-a-young-thermokarst-lake-formed-by-abrupt-permafrost-thaw(9abf205d-e677-4e51-b1d7-3196b7e5bae6).html https://doi.org/10.1111/gcb.16151 http://www.scopus.com/inward/record.url?scp=85126475091&partnerID=8YFLogxK https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9310722/pdf/GCB-28-3206.pdf |
id |
ftuniaarhuspubl:oai:pure.atira.dk:publications/9abf205d-e677-4e51-b1d7-3196b7e5bae6 |
---|---|
record_format |
openpolar |
spelling |
ftuniaarhuspubl:oai:pure.atira.dk:publications/9abf205d-e677-4e51-b1d7-3196b7e5bae6 2023-12-17T10:25:53+01:00 Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw Pellerin, André Lotem, Noam Walter Anthony, Katey Eliani Russak, Efrat Hasson, Nicholas Røy, Hans Chanton, Jeffrey P. Sivan, Orit 2022-05 https://pure.au.dk/portal/da/publications/methane-production-controls-in-a-young-thermokarst-lake-formed-by-abrupt-permafrost-thaw(9abf205d-e677-4e51-b1d7-3196b7e5bae6).html https://doi.org/10.1111/gcb.16151 http://www.scopus.com/inward/record.url?scp=85126475091&partnerID=8YFLogxK https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9310722/pdf/GCB-28-3206.pdf eng eng https://pure.au.dk/portal/da/publications/methane-production-controls-in-a-young-thermokarst-lake-formed-by-abrupt-permafrost-thaw(9abf205d-e677-4e51-b1d7-3196b7e5bae6).html info:eu-repo/semantics/openAccess Pellerin , A , Lotem , N , Walter Anthony , K , Eliani Russak , E , Hasson , N , Røy , H , Chanton , J P & Sivan , O 2022 , ' Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw ' , Global change biology , vol. 28 , no. 10 , pp. 3206-3221 . https://doi.org/10.1111/gcb.16151 Alaska Arctic emission methane methanogenesis permafrost stable isotopes thermokarst article 2022 ftuniaarhuspubl https://doi.org/10.1111/gcb.16151 2023-11-23T00:01:54Z Methane (CH 4 ) release to the atmosphere from thawing permafrost contributes significantly to global CH 4 emissions. However, constraining the effects of thaw that control the production and emission of CH 4 is needed to anticipate future Arctic emissions. Here are presented robust rate measurements of CH 4 production and cycling in a region of rapidly degrading permafrost. Big Trail Lake, located in central Alaska, is a young, actively expanding thermokarst lake. The lake was investigated by taking two 1 m cores of sediment from different regions. Two independent methods of measuring microbial CH 4 production, long term (CH 4 accumulation) and short term ( 14 C tracer), produced similar average rates of 11 ± 3.5 and 9 ± 3.6 nmol cm −3 d −1 , respectively. The rates had small variations between the different lithological units, indicating homogeneous CH 4 production despite heterogeneous lithology in the surface ~1 m of sediment. To estimate the total CH 4 production, the CH 4 production rates were multiplied through the 10–15 m deep talik (thaw bulb). This estimate suggests that CH 4 production is higher than emission by a maximum factor of ~2, which is less than previous estimates. Stable and radioactive carbon isotope measurements showed that 50% of dissolved CH 4 in the first meter was produced further below. Interestingly, labeled 14 C incubations with 2- 14 C acetate and 14 C CO 2 indicate that variations in the pathway used by microbes to produce CH 4 depends on the age and type of organic matter in the sediment, but did not appear to influence the rates at which CH 4 was produced. This study demonstrates that at least half of the CH 4 produced by microbial breakdown of organic matter in actively expanding thermokarst is emitted to the atmosphere, and that the majority of this CH 4 is produced in the deep sediment. Article in Journal/Newspaper Arctic permafrost Thermokarst Alaska Aarhus University: Research Arctic Talik ENVELOPE(146.601,146.601,59.667,59.667) Trail Lake ENVELOPE(-122.200,-122.200,59.551,59.551) Global Change Biology 28 10 3206 3221 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Alaska Arctic emission methane methanogenesis permafrost stable isotopes thermokarst |
spellingShingle |
Alaska Arctic emission methane methanogenesis permafrost stable isotopes thermokarst Pellerin, André Lotem, Noam Walter Anthony, Katey Eliani Russak, Efrat Hasson, Nicholas Røy, Hans Chanton, Jeffrey P. Sivan, Orit Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw |
topic_facet |
Alaska Arctic emission methane methanogenesis permafrost stable isotopes thermokarst |
description |
Methane (CH 4 ) release to the atmosphere from thawing permafrost contributes significantly to global CH 4 emissions. However, constraining the effects of thaw that control the production and emission of CH 4 is needed to anticipate future Arctic emissions. Here are presented robust rate measurements of CH 4 production and cycling in a region of rapidly degrading permafrost. Big Trail Lake, located in central Alaska, is a young, actively expanding thermokarst lake. The lake was investigated by taking two 1 m cores of sediment from different regions. Two independent methods of measuring microbial CH 4 production, long term (CH 4 accumulation) and short term ( 14 C tracer), produced similar average rates of 11 ± 3.5 and 9 ± 3.6 nmol cm −3 d −1 , respectively. The rates had small variations between the different lithological units, indicating homogeneous CH 4 production despite heterogeneous lithology in the surface ~1 m of sediment. To estimate the total CH 4 production, the CH 4 production rates were multiplied through the 10–15 m deep talik (thaw bulb). This estimate suggests that CH 4 production is higher than emission by a maximum factor of ~2, which is less than previous estimates. Stable and radioactive carbon isotope measurements showed that 50% of dissolved CH 4 in the first meter was produced further below. Interestingly, labeled 14 C incubations with 2- 14 C acetate and 14 C CO 2 indicate that variations in the pathway used by microbes to produce CH 4 depends on the age and type of organic matter in the sediment, but did not appear to influence the rates at which CH 4 was produced. This study demonstrates that at least half of the CH 4 produced by microbial breakdown of organic matter in actively expanding thermokarst is emitted to the atmosphere, and that the majority of this CH 4 is produced in the deep sediment. |
format |
Article in Journal/Newspaper |
author |
Pellerin, André Lotem, Noam Walter Anthony, Katey Eliani Russak, Efrat Hasson, Nicholas Røy, Hans Chanton, Jeffrey P. Sivan, Orit |
author_facet |
Pellerin, André Lotem, Noam Walter Anthony, Katey Eliani Russak, Efrat Hasson, Nicholas Røy, Hans Chanton, Jeffrey P. Sivan, Orit |
author_sort |
Pellerin, André |
title |
Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw |
title_short |
Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw |
title_full |
Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw |
title_fullStr |
Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw |
title_full_unstemmed |
Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw |
title_sort |
methane production controls in a young thermokarst lake formed by abrupt permafrost thaw |
publishDate |
2022 |
url |
https://pure.au.dk/portal/da/publications/methane-production-controls-in-a-young-thermokarst-lake-formed-by-abrupt-permafrost-thaw(9abf205d-e677-4e51-b1d7-3196b7e5bae6).html https://doi.org/10.1111/gcb.16151 http://www.scopus.com/inward/record.url?scp=85126475091&partnerID=8YFLogxK https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9310722/pdf/GCB-28-3206.pdf |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) ENVELOPE(-122.200,-122.200,59.551,59.551) |
geographic |
Arctic Talik Trail Lake |
geographic_facet |
Arctic Talik Trail Lake |
genre |
Arctic permafrost Thermokarst Alaska |
genre_facet |
Arctic permafrost Thermokarst Alaska |
op_source |
Pellerin , A , Lotem , N , Walter Anthony , K , Eliani Russak , E , Hasson , N , Røy , H , Chanton , J P & Sivan , O 2022 , ' Methane production controls in a young thermokarst lake formed by abrupt permafrost thaw ' , Global change biology , vol. 28 , no. 10 , pp. 3206-3221 . https://doi.org/10.1111/gcb.16151 |
op_relation |
https://pure.au.dk/portal/da/publications/methane-production-controls-in-a-young-thermokarst-lake-formed-by-abrupt-permafrost-thaw(9abf205d-e677-4e51-b1d7-3196b7e5bae6).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/gcb.16151 |
container_title |
Global Change Biology |
container_volume |
28 |
container_issue |
10 |
container_start_page |
3206 |
op_container_end_page |
3221 |
_version_ |
1785577552378593280 |