First pan-Arctic assessment of dissolved organic carbon in lakes of the permafrost region
Lakes in permafrost regions are dynamic landscape components and play an important role for climate change feedbacks. Lake processes such as mineralization and flocculation of dissolved organic carbon (DOC), one of the main carbon fractions in lakes, contribute to the greenhouse effect and are part...
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2021
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Online Access: | https://doi.org/10.5194/bg-18-3917-2021 https://bg.copernicus.org/articles/18/3917/2021/ |
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ftcopernicus:oai:publications.copernicus.org:bg90828 2023-05-15T14:51:18+02:00 First pan-Arctic assessment of dissolved organic carbon in lakes of the permafrost region Stolpmann, Lydia Coch, Caroline Morgenstern, Anne Boike, Julia Fritz, Michael Herzschuh, Ulrike Stoof-Leichsenring, Kathleen Dvornikov, Yury Heim, Birgit Lenz, Josefine Larsen, Amy Walter Anthony, Katey Jones, Benjamin Frey, Karen Grosse, Guido 2021-06-30 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/bg-18-3917-2021 https://bg.copernicus.org/articles/18/3917/2021/ eng eng info:eu-repo/grantAgreement/EC/FP7/338335 doi:10.5194/bg-18-3917-2021 https://bg.copernicus.org/articles/18/3917/2021/ info:eu-repo/semantics/openAccess eISSN: 1726-4189 info:eu-repo/semantics/Text 2021 ftcopernicus https://doi.org/10.5194/bg-18-3917-2021 2021-07-05T16:22:14Z Lakes in permafrost regions are dynamic landscape components and play an important role for climate change feedbacks. Lake processes such as mineralization and flocculation of dissolved organic carbon (DOC), one of the main carbon fractions in lakes, contribute to the greenhouse effect and are part of the global carbon cycle. These processes are in the focus of climate research, but studies so far are limited to specific study regions. In our synthesis, we analyzed 2167 water samples from 1833 lakes across the Arctic in permafrost regions of Alaska, Canada, Greenland, and Siberia to provide first pan-Arctic insights for linkages between DOC concentrations and the environment. Using published data and unpublished datasets from the author team, we report regional DOC differences linked to latitude, permafrost zones, ecoregions, geology, near-surface soil organic carbon contents, and ground ice classification of each lake region. The lake DOC concentrations in our dataset range from 0 to 1130 mg L −1 (10.8 mg L −1 median DOC concentration). Regarding the permafrost regions of our synthesis, we found median lake DOC concentrations of 12.4 mg L −1 (Siberia), 12.3 mg L −1 (Alaska), 10.3 mg L −1 (Greenland), and 4.5 mg L −1 (Canada). Our synthesis shows a significant relationship between lake DOC concentration and lake ecoregion. We found higher lake DOC concentrations at boreal permafrost sites compared to tundra sites. We found significantly higher DOC concentrations in lakes in regions with ice-rich syngenetic permafrost deposits (yedoma) compared to non-yedoma lakes and a weak but significant relationship between soil organic carbon content and lake DOC concentration as well as between ground ice content and lake DOC. Our pan-Arctic dataset shows that the DOC concentration of a lake depends on its environmental properties, especially on permafrost extent and ecoregion, as well as vegetation, which is the most important driver of lake DOC in this study. This new dataset will be fundamental to quantify a pan-Arctic lake DOC pool for estimations of the impact of lake DOC on the global carbon cycle and climate change. Other/Unknown Material Arctic Climate change Greenland Ice permafrost Tundra Alaska Siberia Copernicus Publications: E-Journals Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Canada Greenland Biogeosciences 18 12 3917 3936 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Lakes in permafrost regions are dynamic landscape components and play an important role for climate change feedbacks. Lake processes such as mineralization and flocculation of dissolved organic carbon (DOC), one of the main carbon fractions in lakes, contribute to the greenhouse effect and are part of the global carbon cycle. These processes are in the focus of climate research, but studies so far are limited to specific study regions. In our synthesis, we analyzed 2167 water samples from 1833 lakes across the Arctic in permafrost regions of Alaska, Canada, Greenland, and Siberia to provide first pan-Arctic insights for linkages between DOC concentrations and the environment. Using published data and unpublished datasets from the author team, we report regional DOC differences linked to latitude, permafrost zones, ecoregions, geology, near-surface soil organic carbon contents, and ground ice classification of each lake region. The lake DOC concentrations in our dataset range from 0 to 1130 mg L −1 (10.8 mg L −1 median DOC concentration). Regarding the permafrost regions of our synthesis, we found median lake DOC concentrations of 12.4 mg L −1 (Siberia), 12.3 mg L −1 (Alaska), 10.3 mg L −1 (Greenland), and 4.5 mg L −1 (Canada). Our synthesis shows a significant relationship between lake DOC concentration and lake ecoregion. We found higher lake DOC concentrations at boreal permafrost sites compared to tundra sites. We found significantly higher DOC concentrations in lakes in regions with ice-rich syngenetic permafrost deposits (yedoma) compared to non-yedoma lakes and a weak but significant relationship between soil organic carbon content and lake DOC concentration as well as between ground ice content and lake DOC. Our pan-Arctic dataset shows that the DOC concentration of a lake depends on its environmental properties, especially on permafrost extent and ecoregion, as well as vegetation, which is the most important driver of lake DOC in this study. This new dataset will be fundamental to quantify a pan-Arctic lake DOC pool for estimations of the impact of lake DOC on the global carbon cycle and climate change. |
format |
Other/Unknown Material |
author |
Stolpmann, Lydia Coch, Caroline Morgenstern, Anne Boike, Julia Fritz, Michael Herzschuh, Ulrike Stoof-Leichsenring, Kathleen Dvornikov, Yury Heim, Birgit Lenz, Josefine Larsen, Amy Walter Anthony, Katey Jones, Benjamin Frey, Karen Grosse, Guido |
spellingShingle |
Stolpmann, Lydia Coch, Caroline Morgenstern, Anne Boike, Julia Fritz, Michael Herzschuh, Ulrike Stoof-Leichsenring, Kathleen Dvornikov, Yury Heim, Birgit Lenz, Josefine Larsen, Amy Walter Anthony, Katey Jones, Benjamin Frey, Karen Grosse, Guido First pan-Arctic assessment of dissolved organic carbon in lakes of the permafrost region |
author_facet |
Stolpmann, Lydia Coch, Caroline Morgenstern, Anne Boike, Julia Fritz, Michael Herzschuh, Ulrike Stoof-Leichsenring, Kathleen Dvornikov, Yury Heim, Birgit Lenz, Josefine Larsen, Amy Walter Anthony, Katey Jones, Benjamin Frey, Karen Grosse, Guido |
author_sort |
Stolpmann, Lydia |
title |
First pan-Arctic assessment of dissolved organic carbon in lakes of the permafrost region |
title_short |
First pan-Arctic assessment of dissolved organic carbon in lakes of the permafrost region |
title_full |
First pan-Arctic assessment of dissolved organic carbon in lakes of the permafrost region |
title_fullStr |
First pan-Arctic assessment of dissolved organic carbon in lakes of the permafrost region |
title_full_unstemmed |
First pan-Arctic assessment of dissolved organic carbon in lakes of the permafrost region |
title_sort |
first pan-arctic assessment of dissolved organic carbon in lakes of the permafrost region |
publishDate |
2021 |
url |
https://doi.org/10.5194/bg-18-3917-2021 https://bg.copernicus.org/articles/18/3917/2021/ |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) |
geographic |
Arctic Arctic Lake Canada Greenland |
geographic_facet |
Arctic Arctic Lake Canada Greenland |
genre |
Arctic Climate change Greenland Ice permafrost Tundra Alaska Siberia |
genre_facet |
Arctic Climate change Greenland Ice permafrost Tundra Alaska Siberia |
op_source |
eISSN: 1726-4189 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/338335 doi:10.5194/bg-18-3917-2021 https://bg.copernicus.org/articles/18/3917/2021/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-18-3917-2021 |
container_title |
Biogeosciences |
container_volume |
18 |
container_issue |
12 |
container_start_page |
3917 |
op_container_end_page |
3936 |
_version_ |
1766322345608216576 |