Initial Results Comparing Spectral Signatures of Post-fire Materials, Western Montana

May 25, 2017 | Autor: Ulrich Kamp | Categoria: Remote Sensing, Spectrum
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Initial Results Comparing Spectral Signatures of Post-fire Materials, Western Montana Presentation · December 2006

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3 authors: Anna E Klene

Karin L. Riley

University of Montana

US Forest Service

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Initial Results Comparing Spectral Signatures of Post-fire Materials, Western Montana Klene, A.; Riley, K. L.; Kamp, U. American Geophysical Union, Fall Meeting 2006, abstract #B11C-1039 Current algorithms for estimating fire severity from remotely sensed imagery are based on pre-fire to post-fire changes in reflectance values within the sensor's bands, rather than on an understanding of how spectral signatures of burned areas differ from unburned areas. However, spectral signatures for materials commonly found in burned areas of the landscape, including ash, charcoal, and burned pine needles have not been published. With a fundamental understanding of how fire alters the spectral signatures of a landscape, fire severity algorithms could readily be derived for any sensor. Spectral signatures of charcoal, soil and other materials were collected for this project in several burned areas in western Montana during the summer of 2006. An ASD FieldSpec3 spectroradiometer (350-2500 nm) was used for collection. Time since burn ranged from one week to one year. Spectral signatures were also collected for vegetation and other common materials outside the burn perimeter and for areas 26 inches in diameter with a mix of vegetation and burned materials. We present characteristic spectra for these types of materials associated with wildland fire, and regions of the electromagnetic spectrum that experience the most change due to wildfire. These results aid interpretation of the environmental effects of wildfire in remotely sensed imagery of burned areas. Keywords: 0400 BIOGEOSCIENCES, 0439 Ecosystems, structure and dynamics (4815), 0480 Remote sensing, 0486 Soils/pedology (1865)  

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