DOI: 10.1111/gcb.12434
论文题名: Autumn warming reduces the CO2 sink of a black spruce forest in interior Alaska based on a nine-year eddy covariance measurement
作者: Ueyama M. ; Iwata H. ; Harazono Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 4 起始页码: 1161
结束页码: 1173
语种: 英语
英文关键词: Alaska
; Autumn warming
; Black spruce
; CO2 balance
; Ecosystem respiration
; Eddy covariance
; Interannual variability
; Net ecosystem exchange
Scopus关键词: air temperature
; annual variation
; autumn
; carbon balance
; carbon dioxide
; carbon flux
; carbon sink
; climate oscillation
; climate variation
; eddy covariance
; evergreen tree
; net ecosystem exchange
; primary production
; respiration
; seasonal variation
; Alaska
; United States
; Picea mariana
; carbon dioxide
; analysis of variance
; ecosystem
; season
; spruce
; temperature
; tree
; uncertainty
; United States
; Alaska
; Analysis of Variance
; Carbon Dioxide
; Ecosystem
; Picea
; Seasons
; Temperature
; Trees
; Uncertainty
英文摘要: Nine years (2003-2011) of carbon dioxide (CO2) flux were measured at a black spruce forest in interior Alaska using the eddy covariance method. Seasonal and interannual variations in the gross primary productivity (GPP) and ecosystem respiration (RE) were associated primarily with air temperature: warmer conditions enhanced GPP and RE. Meanwhile, interannual variation in annual CO2 balance was controlled predominantly by RE, and not GPP. During these 9 years of measurement, the annual CO2 balance shifted from a CO2 sink to a CO2 source, with a 9-year average near zero. The increase in autumn RE was associated with autumn warming and was mostly attributed to a shift in the annual CO2 balance. The increase in autumn air temperature (0.22 °C yr-1) during the 9 years of study was 15 times greater than the long-term warming trend between 1905 and 2011 (0.015 °C yr-1) due to decadal climate oscillation. This result indicates that most of the shifts in observed CO2 fluxes were associated with decadal climate variability. Because the natural climate varies in a cycle of 10-30 years, a long-term study covering at least one full cycle of decadal climate oscillation is important to quantify the CO2 balance and its interaction with the climate. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61951
Appears in Collections: 影响、适应和脆弱性
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作者单位: Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Japan; International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, United States; Graduate School of Agriculture, Kyoto University, Kyoto, Japan
Recommended Citation:
Ueyama M.,Iwata H.,Harazono Y.. Autumn warming reduces the CO2 sink of a black spruce forest in interior Alaska based on a nine-year eddy covariance measurement[J]. Global Change Biology,2014-01-01,20(4)