DOI: 10.1002/2012JD019378
论文题名: Effects of tree morphometry on net snow cover radiation on forest floor for varying vegetation densities
作者: Seyednasrollah B. ; Kumar M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 22 起始页码: 12508
结束页码: 12521
语种: 英语
英文关键词: forest management
; FoRM
; radiation modeling
; snow melt
; tree geometry
; water management
Scopus关键词: Forming
; Radiation effects
; Snow
; Vegetation
; Water management
; Cloudy conditions
; Forested watersheds
; Management strategies
; Morphological characteristic
; Morphometric parameters
; Radiation modeling
; Snow melt
; Vegetation density
; Forestry
; atmosphere-biosphere interaction
; clear sky
; cloud cover
; forest floor
; forest management
; height
; morphometry
; shape
; snow cover
; snowmelt
; vegetation structure
; watershed
英文摘要: Using a forest radiation model, this paper explores the effects of tree morphometric parameters and shape on net snow cover radiation on the forest floor. Results show that tree shape, height and crown size and density have significant effects on the amount of radiation on forest floor and its variation with vegetation density. In clear sky conditions, where net radiation frequently shows a nonmonotonic decreasing then increasing trend with increasing vegetation density, a smaller radiation minimum is obtained for taller trees, larger and denser crowns, and cylindrical-shaped crowns. The obtained radiation minimum is also expressed at a smaller vegetation density for these tree configurations. In contrast, trees with smaller crown dimensions show propensity for a monotonically decreasing trend in net radiation with increasing vegetation density. The sensitivity to tree morphometric parameters, especially tree height and crown width and density, on forest floor radiation are however relatively modest for interspersed cloudy conditions. The results will facilitate identification of forest management strategies to minimize or maximize net radiation in snow-dominated forested watersheds and will allow intercomparison of snowmelt rates between forests with different vegetation densities and morphological characteristics. Key Points Tree shape, height, and crown size and density affect radiation on forest floor Tree morphometry affects the variation in radiation with vegetation density Larger trees are more likely to exhibit a radiation minimum ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63151
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Nicholas School of the Environment, Duke University, PO Box 90328, Durham, NC 27708, United States
Recommended Citation:
Seyednasrollah B.,Kumar M.. Effects of tree morphometry on net snow cover radiation on forest floor for varying vegetation densities[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(22)