Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon
Climate-sensitive Arctic lakes have been identified as conduits for ancient permafrost-carbon (C) emissions and as such accelerate warming. However, the environmental factors that control emission pathways and their sources are unclear; this complicates upscaling, forecasting and climate-impact-asse...
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ftcdlib:oai:escholarship.org:ark:/13030/qt9q0086pg 2023-06-11T04:08:29+02:00 Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon Elder, Clayton D Xu, Xiaomei Walker, Jennifer Schnell, Jordan L Hinkel, Kenneth M Townsend-Small, Amy Arp, Christopher D Pohlman, John W Gaglioti, Benjamin V Czimczik, Claudia I 166 - 171 2018-02-01 application/pdf https://escholarship.org/uc/item/9q0086pg unknown eScholarship, University of California qt9q0086pg https://escholarship.org/uc/item/9q0086pg public Nature Climate Change, vol 8, iss 2 Climate Action Atmospheric Sciences Physical Geography and Environmental Geoscience Environmental Science and Management article 2018 ftcdlib 2023-05-29T17:59:32Z Climate-sensitive Arctic lakes have been identified as conduits for ancient permafrost-carbon (C) emissions and as such accelerate warming. However, the environmental factors that control emission pathways and their sources are unclear; this complicates upscaling, forecasting and climate-impact-assessment efforts. Here we show that current whole-lake CH4 and CO2 emissions from widespread lakes in Arctic Alaska primarily originate from organic matter fixed within the past 3-4 millennia (modern to 3,300 ± 70 years before the present), and not from Pleistocene permafrost C. Furthermore, almost 100% of the annual diffusive C flux is emitted as CO2. Although the lakes mostly processed younger C (89 ± 3% of total C emissions), minor contributions from ancient C sources were two times greater in fine-textured versus coarse-textured Pleistocene sediments, which emphasizes the importance of the underlying geological substrate in current and future emissions. This spatially extensive survey considered the environmental and temporal variability necessary to monitor and forecast the fate of ancient permafrost C as Arctic warming progresses. Article in Journal/Newspaper Arctic permafrost Alaska University of California: eScholarship Arctic |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Atmospheric Sciences Physical Geography and Environmental Geoscience Environmental Science and Management |
spellingShingle |
Climate Action Atmospheric Sciences Physical Geography and Environmental Geoscience Environmental Science and Management Elder, Clayton D Xu, Xiaomei Walker, Jennifer Schnell, Jordan L Hinkel, Kenneth M Townsend-Small, Amy Arp, Christopher D Pohlman, John W Gaglioti, Benjamin V Czimczik, Claudia I Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon |
topic_facet |
Climate Action Atmospheric Sciences Physical Geography and Environmental Geoscience Environmental Science and Management |
description |
Climate-sensitive Arctic lakes have been identified as conduits for ancient permafrost-carbon (C) emissions and as such accelerate warming. However, the environmental factors that control emission pathways and their sources are unclear; this complicates upscaling, forecasting and climate-impact-assessment efforts. Here we show that current whole-lake CH4 and CO2 emissions from widespread lakes in Arctic Alaska primarily originate from organic matter fixed within the past 3-4 millennia (modern to 3,300 ± 70 years before the present), and not from Pleistocene permafrost C. Furthermore, almost 100% of the annual diffusive C flux is emitted as CO2. Although the lakes mostly processed younger C (89 ± 3% of total C emissions), minor contributions from ancient C sources were two times greater in fine-textured versus coarse-textured Pleistocene sediments, which emphasizes the importance of the underlying geological substrate in current and future emissions. This spatially extensive survey considered the environmental and temporal variability necessary to monitor and forecast the fate of ancient permafrost C as Arctic warming progresses. |
format |
Article in Journal/Newspaper |
author |
Elder, Clayton D Xu, Xiaomei Walker, Jennifer Schnell, Jordan L Hinkel, Kenneth M Townsend-Small, Amy Arp, Christopher D Pohlman, John W Gaglioti, Benjamin V Czimczik, Claudia I |
author_facet |
Elder, Clayton D Xu, Xiaomei Walker, Jennifer Schnell, Jordan L Hinkel, Kenneth M Townsend-Small, Amy Arp, Christopher D Pohlman, John W Gaglioti, Benjamin V Czimczik, Claudia I |
author_sort |
Elder, Clayton D |
title |
Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon |
title_short |
Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon |
title_full |
Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon |
title_fullStr |
Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon |
title_full_unstemmed |
Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon |
title_sort |
greenhouse gas emissions from diverse arctic alaskan lakes are dominated by young carbon |
publisher |
eScholarship, University of California |
publishDate |
2018 |
url |
https://escholarship.org/uc/item/9q0086pg |
op_coverage |
166 - 171 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Alaska |
genre_facet |
Arctic permafrost Alaska |
op_source |
Nature Climate Change, vol 8, iss 2 |
op_relation |
qt9q0086pg https://escholarship.org/uc/item/9q0086pg |
op_rights |
public |
_version_ |
1768381772054134784 |