Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska
©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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ftcdlib:qt9tm5d4w1 2023-05-15T14:55:05+02:00 Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska Raz-Yaseef, N Torn, MS Wu, Y Billesbach, DP Liljedahl, AK Kneafsey, TJ Romanovsky, VE Cook, DR Wullschleger, SD 504 - 513 2017-01-16 application/pdf http://www.escholarship.org/uc/item/9tm5d4w1 english eng eScholarship, University of California qt9tm5d4w1 http://www.escholarship.org/uc/item/9tm5d4w1 public Raz-Yaseef, N; Torn, MS; Wu, Y; Billesbach, DP; Liljedahl, AK; Kneafsey, TJ; et al.(2017). Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska. Geophysical Research Letters, 44(1), 504 - 513. doi:10.1002/2016GL071220. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/9tm5d4w1 article 2017 ftcdlib https://doi.org/10.1002/2016GL071220 2018-11-02T23:53:26Z ©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 CO2by 46% and adding 6% to cumulative CH4emissions. 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 CO2and CH4spring 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. Article in Journal/Newspaper Arctic Barrow Tundra Alaska University of California: eScholarship Arctic Geophysical Research Letters 44 1 504 513 |
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Open Polar |
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University of California: eScholarship |
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English |
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 CO2by 46% and adding 6% to cumulative CH4emissions. 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 CO2and CH4spring 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. |
format |
Article in Journal/Newspaper |
author |
Raz-Yaseef, N Torn, MS Wu, Y Billesbach, DP Liljedahl, AK Kneafsey, TJ Romanovsky, VE Cook, DR Wullschleger, SD |
spellingShingle |
Raz-Yaseef, N Torn, MS Wu, Y Billesbach, DP Liljedahl, AK Kneafsey, TJ Romanovsky, VE Cook, DR Wullschleger, SD Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska |
author_facet |
Raz-Yaseef, N Torn, MS Wu, Y Billesbach, DP Liljedahl, AK Kneafsey, TJ Romanovsky, VE Cook, DR Wullschleger, SD |
author_sort |
Raz-Yaseef, N |
title |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska |
title_short |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska |
title_full |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska |
title_fullStr |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska |
title_full_unstemmed |
Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska |
title_sort |
large co 2 and ch 4 emissions from polygonal tundra during spring thaw in northern alaska |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
http://www.escholarship.org/uc/item/9tm5d4w1 |
op_coverage |
504 - 513 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow Tundra Alaska |
genre_facet |
Arctic Barrow Tundra Alaska |
op_source |
Raz-Yaseef, N; Torn, MS; Wu, Y; Billesbach, DP; Liljedahl, AK; Kneafsey, TJ; et al.(2017). Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska. Geophysical Research Letters, 44(1), 504 - 513. doi:10.1002/2016GL071220. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/9tm5d4w1 |
op_relation |
qt9tm5d4w1 http://www.escholarship.org/uc/item/9tm5d4w1 |
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public |
op_doi |
https://doi.org/10.1002/2016GL071220 |
container_title |
Geophysical Research Letters |
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44 |
container_issue |
1 |
container_start_page |
504 |
op_container_end_page |
513 |
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1766326876808151040 |