| DOI: | 10.1002/2016GL069769
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| 论文题名: | Earlier snowmelt reduces atmospheric carbon uptake in midlatitude subalpine forests |
| 作者: | Winchell T.S.; Barnard D.M.; Monson R.K.; Burns S.P.; Molotch N.P.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8777
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| EISSN: | 1944-8508
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| 出版年: | 2016
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| 卷: | 43, 期:15 | | 起始页码: | 8160
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| 结束页码: | 8168
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| 语种: | 英语
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| 英文关键词: | carbon uptake
; net ecosystem exchange
; snow ablation period
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| Scopus关键词: | Ablation
; Ecology
; Ecosystems
; Environmental engineering
; Forestry
; Snow
; Snow melting systems
; Air temperature cycle
; Carbon uptake
; Eddy covariance measurements
; Mean air temperatures
; Multi-linear regression
; Net ecosystem exchange
; Snow ablation
; Snow water equivalent
; Atmospheric temperature
; ablation
; air temperature
; atmospheric gas
; carbon
; eddy covariance
; forest ecosystem
; gas exchange
; global warming
; net ecosystem exchange
; seasonal variation
; snow water equivalent
; snowmelt
; subalpine environment
; Colorado
; United States
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| 英文摘要: | Previous work demonstrates conflicting evidence regarding the influence of snowmelt timing on forest net ecosystem exchange (NEE). Based on 15 years of eddy covariance measurements in Colorado, years with earlier snowmelt exhibited less net carbon uptake during the snow ablation period, which is a period of high potential for productivity. Earlier snowmelt aligned with colder periods of the seasonal air temperature cycle relative to later snowmelt. We found that the colder ablation-period air temperatures during these early snowmelt years lead to reduced rates of daily NEE. Hence, earlier snowmelt associated with climate warming, counterintuitively, leads to colder atmospheric temperatures during the snow ablation period and concomitantly reduced rates of net carbon uptake. Using a multilinear-regression (R2 = 0.79, P < 0.001) relating snow ablation period mean air temperature and peak snow water equivalent (SWE) to ablation-period NEE, we predict that earlier snowmelt and decreased SWE may cause a 45% reduction in midcentury ablation-period net carbon uptake. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84980401172&doi=10.1002%2f2016GL069769&partnerID=40&md5=5aa267c935b236d646295abbaac5d057
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| Citation statistics: |
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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/9740
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Institute of Alpine and Arctic Research, University of Colorado Boulder, Boulder, CO, United States
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| Recommended Citation: | |
Winchell T.S.,Barnard D.M.,Monson R.K.,et al. Earlier snowmelt reduces atmospheric carbon uptake in midlatitude subalpine forests[J]. Geophysical Research Letters,2016-01-01,43(15).
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