DOI: 10.1002/2014GL062024
论文题名: Postfire influences of snag attrition on albedo and radiative forcing
作者: O'Halloran T.L. ; Acker S.A. ; Joerger V.M. ; Kertis J. ; Law B.E.
刊名: Geophysical Research Letters
ISSN: 0094-9451
EISSN: 1944-9182
出版年: 2014
卷: 41, 期: 24 起始页码: 9135
结束页码: 9142
语种: 英语
英文关键词: albedo
; disturbance
; fire
; radiative forcing
; snags
; succession
Scopus关键词: Atmospheric radiation
; Fires
; Vegetation
; albedo
; disturbance
; Radiative forcings
; snags
; succession
; Solar radiation
; albedo
; correlation
; fire
; perturbation
; radiative forcing
; snag
; vegetation dynamics
; Oregon
; United States
英文摘要: This paper examines albedo perturbation and radiative forcing after a high-severity fire in a mature forest in the Oregon Cascade Range. Correlations between postfire albedo and seedling, sapling, and snag (standing dead tree) density were investigated across fire severity classes and seasons for years 4-15 after fire. Albedo perturbation was 14 times larger in winter compared to summer and increased with fire severity class for the first several years. Albedo perturbation increased linearly with time over the study period. Correlations between albedo perturbations and the vegetation densities were strongest with snags, and significant in all fire classes in both summer and winter (R < -0.92, p < 0.01). The resulting annual radiative forcing at the top of the atmosphere became more negative linearly at a rate of -0.86 W m-2 yr-1, reaching -15 W m-2 in year 15 after fire. This suggests that snags can be the dominant controller of postfire albedo on decadal time scales. Key Points Snag attrition controls postfire albedo more than vegetation recoveryAlbedo perturbation was 14 times larger in winter compared to summerNegative radiative forcing increases linearly for at least 15 years postfire ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921743355&doi=10.1002%2f2014GL062024&partnerID=40&md5=66028dc58996ebc2c8ed62ce104424a0
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6715
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Science, Sweet Briar College, Sweet Briar, VA, United States
Recommended Citation:
O'Halloran T.L.,Acker S.A.,Joerger V.M.,et al. Postfire influences of snag attrition on albedo and radiative forcing[J]. Geophysical Research Letters,2014-01-01,41(24).