Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL071220 |
Large CO2 and CH4 emissions from polygonal tundra during spring thaw in northern Alaska | |
Raz-Yaseef, Naama1; Torn, Margaret S.1,2; Wu, Yuxin1; Billesbach, Dave P.3; Liljedahl, Anna K.4; Kneafsey, Timothy J.1; Romanovsky, Vladimir E.5; Cook, David R.6; Wullschleger, Stan D.7 | |
2017 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | 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 2week period prior to snowmelt in 2014, large fluxes were measured, reducing net summer uptake of CO2 by 46% and adding 6% to cumulative CH4 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 CO2 and CH4 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. |
英文关键词 | Arctic tundra carbon fluxes thaw pulse eddy covariance |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393954900058 |
WOS关键词 | METHANE EMISSION ; ARCTIC TUNDRA ; PERMAFROST CARBON ; ACTIVE LAYER ; ECOSYSTEM ; EXCHANGE ; FLUXES ; SEASON ; SOILS ; SNOW |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26724 |
专题 | 气候变化 |
作者单位 | 1.Lawrence Berkeley Natl Lab, Climate & Ecosyst Sci Div, Berkeley, CA 94720 USA; 2.Univ Calif Berkeley, Energy & Resources Grp, Berkeley, CA 94720 USA; 3.Univ Nebraska, Dept Biol Syst Engn, Lincoln, NE USA; 4.Univ Alaska Fairbanks, Water & Environm Res Ctr, Fairbanks, AK USA; 5.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA; 6.Argonne Natl Lab, Div Environm Sci, Lemont, IL USA; 7.Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA |
推荐引用方式 GB/T 7714 | Raz-Yaseef, Naama,Torn, Margaret S.,Wu, Yuxin,et al. Large CO2 and CH4 emissions from polygonal tundra during spring thaw in northern Alaska[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(1). |
APA | Raz-Yaseef, Naama.,Torn, Margaret S..,Wu, Yuxin.,Billesbach, Dave P..,Liljedahl, Anna K..,...&Wullschleger, Stan D..(2017).Large CO2 and CH4 emissions from polygonal tundra during spring thaw in northern Alaska.GEOPHYSICAL RESEARCH LETTERS,44(1). |
MLA | Raz-Yaseef, Naama,et al."Large CO2 and CH4 emissions from polygonal tundra during spring thaw in northern Alaska".GEOPHYSICAL RESEARCH LETTERS 44.1(2017). |
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