Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR024898 |
Revisiting Snow Cover Variability and Canopy Structure Within Forest Stands: Insights From Airborne Lidar Data | |
Mazzotti, Giulia1,2; Currier, William Ryan3; Deems, Jeffrey S.4; Pflug, Justin M.3; Lundquist, Jessica D.3; Jonas, Tobias1 | |
2019-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:7页码:6198-6216 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; USA |
英文摘要 | The retrieval of detailed, co-located snow depth and canopy cover information from airborne lidar has advanced our understanding of links between forest snow distribution and canopy structure. In this study, we present two recent high-resolution (1 m) lidar data sets acquired in (i) a 2017 mission in the Eastern Swiss Alps and (ii) NASA's 2017 SnowEx field campaign at Grand Mesa, Colorado. Validation of derived snow depth maps against extensive manual measurements revealed a RMSE of 6 and 3 cm for plot-level mean and standard deviation of snow depth, respectively, demonstrating that within-stand snow distribution patterns were captured reliably. Lidar data were further processed to obtain canopy structure metrics. To this end, we developed a novel approach involving a continuous measure of local distance to canopy edge (DCE), which enabled creating spatially aggregated nondirectional and directional descriptors of the canopy structure. DCE-based canopy metrics were correlated to mean and standard deviation of snow depth over areas representing grid-cell sizes typical of watershed and regional model applications (20-200 m). Snow depth increased along the DCE gradient from dense canopy to the center of canopy gaps for all sites and acquisition times, while directional effects particularly evolved during the ablation season. These findings highlight the control of canopy gap distribution on snow distribution in discontinuous forests, with higher snow depths where the open fraction is concentrated in few large gaps rather than many fragmented small gaps. In these environments, dedicated canopy structure metrics such as DCE should advance spatially distributed snow modeling. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481444700058 |
WOS关键词 | INCOMING LONGWAVE RADIATION ; WATER EQUIVALENT ; ACCUMULATION ; DEPTH ; INTERCEPTION ; DEPLETION ; MODEL ; MELT ; ABLATION ; PLOT |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
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/184879 |
专题 | 资源环境科学 |
作者单位 | 1.WSL Swiss Fed Inst Snow & Avalanche Res, Davos, Switzerland; 2.Swiss Fed Inst Technol, Lab Hydraul Hydrol & Glaciol, Zurich, Switzerland; 3.Univ Washington, Dept Civil & Environm Engn, Seattle, WA 98195 USA; 4.Natl Snow & Ice Data Ctr, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Mazzotti, Giulia,Currier, William Ryan,Deems, Jeffrey S.,et al. Revisiting Snow Cover Variability and Canopy Structure Within Forest Stands: Insights From Airborne Lidar Data[J]. WATER RESOURCES RESEARCH,2019,55(7):6198-6216. |
APA | Mazzotti, Giulia,Currier, William Ryan,Deems, Jeffrey S.,Pflug, Justin M.,Lundquist, Jessica D.,&Jonas, Tobias.(2019).Revisiting Snow Cover Variability and Canopy Structure Within Forest Stands: Insights From Airborne Lidar Data.WATER RESOURCES RESEARCH,55(7),6198-6216. |
MLA | Mazzotti, Giulia,et al."Revisiting Snow Cover Variability and Canopy Structure Within Forest Stands: Insights From Airborne Lidar Data".WATER RESOURCES RESEARCH 55.7(2019):6198-6216. |
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