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DOI | 10.3390/rs70201397 |
Uncertainty Analysis in the Creation of a Fine-Resolution Leaf Area Index (LAI) Reference Map for Validation of Moderate Resolution LAI Products | |
Iiames, John S.1; Congalton, Russell G.2; Lewis, Timothy E.3; Pilant, Andrew N.1 | |
发表日期 | 2015-02-01 |
ISSN | 2072-4292 |
卷号 | 7期号:2页码:1397-1421 |
英文摘要 | The validation process for a moderate resolution leaf area index (LAI) product (i.e., MODIS) involves the creation of a high spatial resolution LAI reference map (Lai-RM), which when scaled to the moderate LAI resolution (i.e., > 1 km) allows for comparison and analysis with this LAI product. This research addresses two major sources of uncertainty in the creation of the LAI-RM: (1) the uncertainty associated with the indirect in situ optical measurements of southeastern United States needle-leaf LAI and (2) the uncertainty in the process of classifying land cover (LC). Uncertainty within the loblolly pine (Pinus taeda) in situ data collection was highest for the assessment of the plant area index (PAI), L-e (27.2%), and the woody-to-total ratio, alpha, (30.6%). The needle-to-shoot ratio, lambda(E), and the element clumping index, omega(E), contributed 14.9% and 9.3%, respectively, to the uncertainty in the calculation of LAI. Combining LC differences (3.4%) with the uncertainty within the loblolly pine component resulted in doubling the LAI-RM variability (sigma = 0.50 to sigma = 0.97) at the 1 km(2) validation site located in Appomattox, Virginia, USA. |
语种 | 英语 |
WOS记录号 | WOS:000352400900012 |
来源期刊 | REMOTE SENSING |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/60768 |
作者单位 | 1.US EPA, Res Triangle Pk, NC 27711 USA; 2.Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA; 3.US Army Corps Engn, Engineer Res & Dev Ctr, Vicksburg, MS 39180 USA |
推荐引用方式 GB/T 7714 | Iiames, John S.,Congalton, Russell G.,Lewis, Timothy E.,et al. Uncertainty Analysis in the Creation of a Fine-Resolution Leaf Area Index (LAI) Reference Map for Validation of Moderate Resolution LAI Products[J]. 美国环保署,2015,7(2):1397-1421. |
APA | Iiames, John S.,Congalton, Russell G.,Lewis, Timothy E.,&Pilant, Andrew N..(2015).Uncertainty Analysis in the Creation of a Fine-Resolution Leaf Area Index (LAI) Reference Map for Validation of Moderate Resolution LAI Products.REMOTE SENSING,7(2),1397-1421. |
MLA | Iiames, John S.,et al."Uncertainty Analysis in the Creation of a Fine-Resolution Leaf Area Index (LAI) Reference Map for Validation of Moderate Resolution LAI Products".REMOTE SENSING 7.2(2015):1397-1421. |
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