Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska
The net change in the carbon inventory of arctic tundra remains uncertain as global warming leads to shifts in arctic water and carbon cycles. To better understand the response of arctic tundra carbon to changes in winter precipitation amount, we investigated soil depth profiles of carbon concentrat...
Published in: | Arctic, Antarctic, and Alpine Research |
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2020
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Online Access: | https://doi.org/10.1080/15230430.2020.1802864 https://doaj.org/article/94f02dd0431a4a63b39406ee574f04eb |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:94f02dd0431a4a63b39406ee574f04eb 2023-05-15T14:14:22+02:00 Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska Karyn C. DeFranco Michael P. Ricketts Elena Blanc-Betes Jeffrey M. Welker Miquel A. Gonzalez-Meler Neil C. Sturchio 2020-01-01 https://doi.org/10.1080/15230430.2020.1802864 https://doaj.org/article/94f02dd0431a4a63b39406ee574f04eb en eng Taylor & Francis Group 1523-0430 1938-4246 doi:10.1080/15230430.2020.1802864 https://doaj.org/article/94f02dd0431a4a63b39406ee574f04eb undefined Arctic, Antarctic, and Alpine Research, Vol 52, Iss 1, Pp 461-475 (2020) arctic alaska tundra carbon 210pb snow depth envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.1080/15230430.2020.1802864 2023-01-22T18:47:17Z The net change in the carbon inventory of arctic tundra remains uncertain as global warming leads to shifts in arctic water and carbon cycles. To better understand the response of arctic tundra carbon to changes in winter precipitation amount, we investigated soil depth profiles of carbon concentration and radionuclide activities (7Be, 137Cs, 210Pb, and 241Am) in the active layer of a twenty-two-year winter snow depth manipulation experiment in moist acidic tussock tundra at Toolik Lake, Alaska. Depth correlations of cumulative carbon dry mass (g cm−2) vs. unsupported 210Pb activity (mBq g−1) were examined using a modified constant rate of supply (CRS) model. Results were best fit by two-slope CRS models indicating an apparent step temporal increase in the accumulation rate of soil organic carbon. Most of the best-fit model chronologies indicated that the increase in carbon accumulation rate apparently began and persisted after snow fence construction in 1994. The inhomogeneous nature of permafrost soils and their relatively low net carbon accumulation rates make it challenging to establish robust chronologic records. Nonetheless, the data obtained in this study support a decadal-scale increase in net soil organic carbon accumulation rate in the active layer of arctic moist acidic tussock tundra under conditions of increased winter precipitation. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Global warming permafrost Tundra Alaska Unknown Arctic Arctic, Antarctic, and Alpine Research 52 1 461 475 |
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Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
arctic alaska tundra carbon 210pb snow depth envir geo |
spellingShingle |
arctic alaska tundra carbon 210pb snow depth envir geo Karyn C. DeFranco Michael P. Ricketts Elena Blanc-Betes Jeffrey M. Welker Miquel A. Gonzalez-Meler Neil C. Sturchio Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska |
topic_facet |
arctic alaska tundra carbon 210pb snow depth envir geo |
description |
The net change in the carbon inventory of arctic tundra remains uncertain as global warming leads to shifts in arctic water and carbon cycles. To better understand the response of arctic tundra carbon to changes in winter precipitation amount, we investigated soil depth profiles of carbon concentration and radionuclide activities (7Be, 137Cs, 210Pb, and 241Am) in the active layer of a twenty-two-year winter snow depth manipulation experiment in moist acidic tussock tundra at Toolik Lake, Alaska. Depth correlations of cumulative carbon dry mass (g cm−2) vs. unsupported 210Pb activity (mBq g−1) were examined using a modified constant rate of supply (CRS) model. Results were best fit by two-slope CRS models indicating an apparent step temporal increase in the accumulation rate of soil organic carbon. Most of the best-fit model chronologies indicated that the increase in carbon accumulation rate apparently began and persisted after snow fence construction in 1994. The inhomogeneous nature of permafrost soils and their relatively low net carbon accumulation rates make it challenging to establish robust chronologic records. Nonetheless, the data obtained in this study support a decadal-scale increase in net soil organic carbon accumulation rate in the active layer of arctic moist acidic tussock tundra under conditions of increased winter precipitation. |
format |
Article in Journal/Newspaper |
author |
Karyn C. DeFranco Michael P. Ricketts Elena Blanc-Betes Jeffrey M. Welker Miquel A. Gonzalez-Meler Neil C. Sturchio |
author_facet |
Karyn C. DeFranco Michael P. Ricketts Elena Blanc-Betes Jeffrey M. Welker Miquel A. Gonzalez-Meler Neil C. Sturchio |
author_sort |
Karyn C. DeFranco |
title |
Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska |
title_short |
Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska |
title_full |
Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska |
title_fullStr |
Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska |
title_full_unstemmed |
Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska |
title_sort |
deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210pb evidence from arctic alaska |
publisher |
Taylor & Francis Group |
publishDate |
2020 |
url |
https://doi.org/10.1080/15230430.2020.1802864 https://doaj.org/article/94f02dd0431a4a63b39406ee574f04eb |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Antarctic and Alpine Research Arctic Arctic Global warming permafrost Tundra Alaska |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Global warming permafrost Tundra Alaska |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 52, Iss 1, Pp 461-475 (2020) |
op_relation |
1523-0430 1938-4246 doi:10.1080/15230430.2020.1802864 https://doaj.org/article/94f02dd0431a4a63b39406ee574f04eb |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/15230430.2020.1802864 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
52 |
container_issue |
1 |
container_start_page |
461 |
op_container_end_page |
475 |
_version_ |
1766286872645992448 |