BurnArea Traverse

Spectrum Details

Modality

NIR

Category

soil

Material Type

Intimate

Sample ID

WRF00-01

Collection Locality

Walker Ranch Fire, Boulder, Colorado USA

Spectral Purity

1b2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

XRF # XRF, EPMA, ICP(Trace), WChem

Sample Description

This is not a spectrum of a collected sample but it is an average of 27 field spectra collected of a severely burned area (including the white ash and blackened ash/char material, and exposed soil minerals) following a wildfire in a ponderosa pine forest. The Walker Ranch Fire (also called the Eldorado Fire at Walker Ranch) occurred on September 15, 2000, in an area west of Boulder, Colorado. The field spectra were collected on September 28, 2000. The fiber optic head of the spectrometer was held approximately 3 feet above the surface of the charred soil. Each of the 27 recorded spectra were 6 second averages of 60 individual spectra measured by the field spectrometer while the user was walking slowly around the burned area. During the measurement, the area covered was roughly a 20 meter by 20 meter area. The average of the 27 field spectra was computed then corrected to absolute reflectance using a National Institute of Standards spectralon correction. Atmospheric absorptions regions were deleted from the final spectrum (data points near 1.4, 1.9, and 2.05 microns and greater than 2.45 microns were modified in this way to remove all traces of atmospheric residues in the field spectra). Spectrum published in: Kokaly, R.F., Rockwell, B.W., Haire, S.L., and King, T.V.V., 2007, Characterization of post-fire surface cover, soils, and burn severity at the Cerro Grande Fire, New Mexico, using hyperspectral and multispectral remote sensing, Remote Sensing of Environment, Volume 106, Issue 3, Pages 305-325. http://dx.doi.org/10.1016/j.rse.2006.08.006 Photos:

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126