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 |
---|---|
Main Authors: | , , , , , |
Language: | unknown |
Published: |
2022
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1780649 https://www.osti.gov/biblio/1780649 https://doi.org/10.1080/15230430.2020.1802864 |
id |
ftosti:oai:osti.gov:1780649 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:1780649 2023-07-30T04:00:50+02:00 Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska DeFranco, Karyn C. Ricketts, Michael P. Blanc-Betes, Elena Welker, Jeffrey M. Gonzalez-Meler, Miquel A. Sturchio, Neil C. 2022-04-04 application/pdf http://www.osti.gov/servlets/purl/1780649 https://www.osti.gov/biblio/1780649 https://doi.org/10.1080/15230430.2020.1802864 unknown http://www.osti.gov/servlets/purl/1780649 https://www.osti.gov/biblio/1780649 https://doi.org/10.1080/15230430.2020.1802864 doi:10.1080/15230430.2020.1802864 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1080/15230430.2020.1802864 2023-07-11T10:03:14Z 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 ( 7 Be, 137 Cs, 210 Pb, and 241 Am) 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 210 Pb 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. Other/Unknown Material Arctic Global warming permafrost Tundra Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Arctic, Antarctic, and Alpine Research 52 1 461 475 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES DeFranco, Karyn C. Ricketts, Michael P. Blanc-Betes, Elena Welker, Jeffrey M. Gonzalez-Meler, Miquel A. Sturchio, Neil C. Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
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 ( 7 Be, 137 Cs, 210 Pb, and 241 Am) 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 210 Pb 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. |
author |
DeFranco, Karyn C. Ricketts, Michael P. Blanc-Betes, Elena Welker, Jeffrey M. Gonzalez-Meler, Miquel A. Sturchio, Neil C. |
author_facet |
DeFranco, Karyn C. Ricketts, Michael P. Blanc-Betes, Elena Welker, Jeffrey M. Gonzalez-Meler, Miquel A. Sturchio, Neil C. |
author_sort |
DeFranco, Karyn C. |
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 |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1780649 https://www.osti.gov/biblio/1780649 https://doi.org/10.1080/15230430.2020.1802864 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming permafrost Tundra Alaska |
genre_facet |
Arctic Global warming permafrost Tundra Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1780649 https://www.osti.gov/biblio/1780649 https://doi.org/10.1080/15230430.2020.1802864 doi:10.1080/15230430.2020.1802864 |
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_ |
1772811499708874752 |