Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission
©2016. American Geophysical Union. All Rights Reserved. The few prethaw observations of tundra carbon fluxes suggest that there may be large spring releases, but little is known about the scale and underlying mechanisms of this phenomenon. To address these questions, we combined ecosystem eddy flux...
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Online Access: | http://www.osti.gov/servlets/purl/1379682 https://www.osti.gov/biblio/1379682 https://doi.org/10.1002/2016GL071220 |
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ftosti:oai:osti.gov:1379682 2023-07-30T04:01:23+02:00 Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission Raz-Yaseef, Naama Torn, Margaret S. Wu, Yuxin Billesbach, Dave P. Liljedahl, Anna K. Kneafsey, Timothy J. Romanovsky, Vladimir E. Cook, David R. Wullschleger, Stan D. 2022-05-23 application/pdf http://www.osti.gov/servlets/purl/1379682 https://www.osti.gov/biblio/1379682 https://doi.org/10.1002/2016GL071220 unknown http://www.osti.gov/servlets/purl/1379682 https://www.osti.gov/biblio/1379682 https://doi.org/10.1002/2016GL071220 doi:10.1002/2016GL071220 2022 ftosti https://doi.org/10.1002/2016GL071220 2023-07-11T09:20:47Z ©2016. American Geophysical Union. All Rights Reserved. The few prethaw observations of tundra carbon fluxes suggest that there may be large spring releases, but little is known about the scale and underlying mechanisms of this phenomenon. To address these questions, we combined ecosystem eddy flux measurements from two towers near Barrow, Alaska, with mechanistic soil-core thawing experiment. During a 2 week period prior to snowmelt in 2014, large fluxes were measured, reducing net summer uptake of CO 2 by 46% and adding 6% to cumulative CH 4 emissions. Emission pulses were linked to unique rain-on-snow events enhancing soil cracking. Controlled laboratory experiment revealed that as surface ice thaws, an immediate, large pulse of trapped gases is emitted. These results suggest that the Arctic CO 2 and CH 4 spring pulse is a delayed release of biogenic gas production from the previous fall and that the pulse can be large enough to offset a significant fraction of the moderate Arctic tundra carbon sink. Other/Unknown Material Arctic Barrow Tundra Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Geophysical Research Letters 44 1 504 513 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
description |
©2016. American Geophysical Union. All Rights Reserved. The few prethaw observations of tundra carbon fluxes suggest that there may be large spring releases, but little is known about the scale and underlying mechanisms of this phenomenon. To address these questions, we combined ecosystem eddy flux measurements from two towers near Barrow, Alaska, with mechanistic soil-core thawing experiment. During a 2 week period prior to snowmelt in 2014, large fluxes were measured, reducing net summer uptake of CO 2 by 46% and adding 6% to cumulative CH 4 emissions. Emission pulses were linked to unique rain-on-snow events enhancing soil cracking. Controlled laboratory experiment revealed that as surface ice thaws, an immediate, large pulse of trapped gases is emitted. These results suggest that the Arctic CO 2 and CH 4 spring pulse is a delayed release of biogenic gas production from the previous fall and that the pulse can be large enough to offset a significant fraction of the moderate Arctic tundra carbon sink. |
author |
Raz-Yaseef, Naama Torn, Margaret S. Wu, Yuxin Billesbach, Dave P. Liljedahl, Anna K. Kneafsey, Timothy J. Romanovsky, Vladimir E. Cook, David R. Wullschleger, Stan D. |
spellingShingle |
Raz-Yaseef, Naama Torn, Margaret S. Wu, Yuxin Billesbach, Dave P. Liljedahl, Anna K. Kneafsey, Timothy J. Romanovsky, Vladimir E. Cook, David R. Wullschleger, Stan D. Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission |
author_facet |
Raz-Yaseef, Naama Torn, Margaret S. Wu, Yuxin Billesbach, Dave P. Liljedahl, Anna K. Kneafsey, Timothy J. Romanovsky, Vladimir E. Cook, David R. Wullschleger, Stan D. |
author_sort |
Raz-Yaseef, Naama |
title |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission |
title_short |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission |
title_full |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission |
title_fullStr |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission |
title_full_unstemmed |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission |
title_sort |
large co 2 and ch 4 emissions from polygonal tundra during spring thaw in northern alaska: spring pulse emission |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1379682 https://www.osti.gov/biblio/1379682 https://doi.org/10.1002/2016GL071220 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow Tundra Alaska |
genre_facet |
Arctic Barrow Tundra Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1379682 https://www.osti.gov/biblio/1379682 https://doi.org/10.1002/2016GL071220 doi:10.1002/2016GL071220 |
op_doi |
https://doi.org/10.1002/2016GL071220 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
1 |
container_start_page |
504 |
op_container_end_page |
513 |
_version_ |
1772812125215916032 |