| DOI: | 10.1002/grl.50348
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| 论文题名: | High biolability of ancient permafrost carbon upon thaw |
| 作者: | Vonk J.E.; Mann P.J.; Davydov S.; Davydova A.; Spencer R.G.M.; Schade J.; Sobczak W.V.; Zimov N.; Zimov S.; Bulygina E.; Eglinton T.I.; Holmes R.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8946
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| EISSN: | 1944-8677
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| 出版年: | 2013
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| 卷: | 40, 期:11 | | 起始页码: | 2689
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| 结束页码: | 2693
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| 语种: | 英语
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| 英文关键词: | dissolved organic carbon
; Kolyma River
; permafrost
; Yedoma
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| Scopus关键词: | Climate warming
; Dissolved organic carbon
; Mixing process
; Ocean water
; River temperature
; Stream water
; Yedoma
; Carbon
; Rivers
; Thawing
; Permafrost
; coastal zone
; dissolved organic carbon
; mixing
; permafrost
; streamwater
; thawing
; Arctic
; Kolyma River
; Russian Federation
; Siberia
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| 英文摘要: | Ongoing climate warming in the Arctic will thaw permafrost and remobilize substantial terrestrial organic carbon (OC) pools. Around a quarter of northern permafrost OC resides in Siberian Yedoma deposits, the oldest form of permafrost carbon. However, our understanding of the degradation and fate of this ancient OC in coastal and fluvial environments still remains rudimentary. Here, we show that ancient dissolved OC (DOC, >21,000 14C years), the oldest DOC ever reported, is mobilized in stream waters draining Yedoma outcrops. Furthermore, this DOC is highly biolabile: 34 ± 0.8% was lost during a 14 day incubation under dark, oxygenated conditions at ambient river temperatures. Mixtures of Yedoma stream DOC with mainstem river and ocean waters, mimicking in situ mixing processes, also showed high DOC losses (14 days; 17 ± 0.8% to 33 ± 1.0%). This suggests that this exceptionally old DOC is among the most biolabile DOC in any previously reported contemporary river or stream in the Arctic. © 2013 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879969370&doi=10.1002%2fgrl.50348&partnerID=40&md5=972eaa7973a4b1c26bf8c7e19e9798aa
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6210
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Earth Sciences, University of Utrecht, P.O. Box 80.021, 3508 TA, Utrecht, Netherlands
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| Recommended Citation: | |
Vonk J.E.,Mann P.J.,Davydov S.,et al. High biolability of ancient permafrost carbon upon thaw[J]. Geophysical Research Letters,2013-01-01,40(11).
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