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DOI | 10.1002/2017GL073884 |
Relationship between aerodynamic roughness length and bulk sedge leaf area index in a mixed-species boreal mire complex | |
Alekseychik, P. K.1; Korrensalo, A.2; Mammarella, I.1; Vesala, T.1,3; Tuittila, E. -S.2 | |
2017-06-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland |
英文摘要 | Leaf area index (LAI) is an important parameter in natural ecosystems, representing the seasonal development of vegetation and photosynthetic potential. However, direct measurement techniques require labor-intensive field campaigns that are usually limited in time, while remote sensing approaches often do not yield reliable estimates. Here we propose that the bulk LAI of sedges (LAI(s)) can be estimated alternatively from a micrometeorological parameter, the aerodynamic roughness length for momentum (z(0)). z(0) can be readily calculated from high-response turbulence and other meteorological data, typically measured continuously and routinely available at ecosystem research sites. The regressions of LAI versus z(0) were obtained using the data from two Finnish natural sites representative of boreal fen and bog ecosystems. LAI(s) was found to be well correlated with z(0) and sedge canopy height. Superior method performance was demonstrated in the fen ecosystem where the sedges make a bigger contribution to overall surface roughness than in bogs. |
英文关键词 | Boreal mires peatlands roughness length leaf area index peatland modeling micrometeorology |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404382600066 |
WOS关键词 | CO2 EXCHANGE ; SEASONAL DYNAMICS ; CANOPY ; PEATLAND ; HEIGHT ; DISPLACEMENT ; PHOTOGRAPHY ; SENSITIVITY ; PHENOLOGY ; FORESTS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28085 |
专题 | 气候变化 |
作者单位 | 1.Univ Helsinki, Dept Phys, Helsinki, Finland; 2.Univ Eastern Finland, Sch Forest Sci, Joensuu, Finland; 3.Univ Helsinki, Dept Forest Sci, Helsinki, Finland |
推荐引用方式 GB/T 7714 | Alekseychik, P. K.,Korrensalo, A.,Mammarella, I.,et al. Relationship between aerodynamic roughness length and bulk sedge leaf area index in a mixed-species boreal mire complex[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(11). |
APA | Alekseychik, P. K.,Korrensalo, A.,Mammarella, I.,Vesala, T.,&Tuittila, E. -S..(2017).Relationship between aerodynamic roughness length and bulk sedge leaf area index in a mixed-species boreal mire complex.GEOPHYSICAL RESEARCH LETTERS,44(11). |
MLA | Alekseychik, P. K.,et al."Relationship between aerodynamic roughness length and bulk sedge leaf area index in a mixed-species boreal mire complex".GEOPHYSICAL RESEARCH LETTERS 44.11(2017). |
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