Arid
DOI10.1016/j.rse.2011.05.001
Remote sensing approaches for reconstructing fire perimeters and burn severity mosaics in desert spring ecosystems
Sunderman, Stephanie O.; Weisberg, Peter J.
通讯作者Weisberg, Peter J.
来源期刊REMOTE SENSING OF ENVIRONMENT
ISSN0034-4257
出版年2011
卷号115期号:9页码:2384-2389
英文摘要

Desert spring ecosystems provide water resources essential for sustaining wildlife, plants, and humans inhabiting arid regions of the world. Disturbance processes in desert spring ecosystems are likely important but have not been well studied. Documentation of historic wildfires in these often remote areas has been inconsistent and proxy records are often not available. Remote sensing methods have been used in other environments to gain information about fires that have occurred over recent decades, but these methods have not been tested in desert spring environments. The differenced normalized burn ratio (dNBR) is the most commonly used method for delineating fire perimeters and burn severity mosaics, although another method, differenced linear spectral unmixing (dSmA), may produce more accurate results in heterogeneous desert spring ecosystems due to its ability to detect changes at the sub-pixel scale. This study compared dNBR and dSMA using field observations of burn presence and fire severity for two recent wildfires. The dNBR method outperformed dSMA, but required some post-processing manipulation to reduce errors of commission. The dNBR classification correctly indentified burned areas with 86% accuracy (3% omission error, 19% commission error) and classified fire severity with 76% accuracy. Misclassification errors were most common in dune and mesquite bosque/meadow land cover types (mean misclassification rate = 36%). Nine of the fifteen wildfires reported to have occurred in the study site were successfully identified, with five of the unidentified fires having reported sizes of less than one hectare. Additional refinement of remote sensing methods is necessary to better distinguish small (<5 ha) burned areas from areas of change resulting from soil moisture fluctuation and other short-term shifts in background conditions. (C) 2011 Elsevier Inc. All rights reserved.


英文关键词Burn severity Fire mapping Landsat Normalized burn ratio Spectral mixture analysis
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000292484400018
WOS类目Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/170316
作者单位Univ Nevada, Dept Nat Resources & Environm Sci, Reno, NV 89557 USA
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Sunderman, Stephanie O.,Weisberg, Peter J.. Remote sensing approaches for reconstructing fire perimeters and burn severity mosaics in desert spring ecosystems[J],2011,115(9):2384-2389.
APA Sunderman, Stephanie O.,&Weisberg, Peter J..(2011).Remote sensing approaches for reconstructing fire perimeters and burn severity mosaics in desert spring ecosystems.REMOTE SENSING OF ENVIRONMENT,115(9),2384-2389.
MLA Sunderman, Stephanie O.,et al."Remote sensing approaches for reconstructing fire perimeters and burn severity mosaics in desert spring ecosystems".REMOTE SENSING OF ENVIRONMENT 115.9(2011):2384-2389.
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