Lythr.lineare

Spectrum Details

Modality

NIR

Category

vegetation

Material Type

PLANT

Sample ID

Lythrum lineare near CRMS326v59

Collection Locality

Coastwide Reference Monitoring System (CRMS) site 326 subplot v59. CRMS326v59 is located in southern Louisiana, approximately 127 kilometers southwest of New Orleans, Louisiana, in the western part of the Terrebonne hydrologic basin on the coast of the Gulf of Mexico.

Spectral Purity

1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Sample Description

This spectrum is the average reflectance of 8 field measurements of green leaves and stems of wand lythrum (Lythrum lineare). The measurements were made on June 7, 2010. These spectra were collected using an ASD Field Spectrometer 3 (FS3) in reflectance mode, relative to a Spectralon reference panel. Plant stems and leaves were bunched together and the fiber optic was held at a distance of 4 cm. During the measurement process, spectra were recorded as the fiber optic was moved along the lengths for four different bundles. An average spectrum was computed from the recorded measurements. The average spectrum was converted to absolute reflectance by multiplying by the reflectance spectrum of the Spectralon reference panel. Site Classification The area has been predominantly classified as brackish marsh (see http://lacoast.gov/crms2/home.aspx). General Site Description The plot is located in southern Louisiana, approximately 127 kilometers southwest of New Orleans, Louisiana. It is in the western part of the Terrebonne hydrologic basin on the coast of the Gulf of Mexico. For additional information on the CRMS site see http://lacoast.gov/crms2/home.aspx Project Background This site was measured as part of joint work between the USGS Denver Spectroscopy Laboratory and the Coastal Restoration Assessment Branch of the USGS National Wetlands Research Center, Baton Rouge. This spectrum was used in: Kokaly, R.F., Couvillion, B.R., Holloway, J.M., Roberts, D.A., Ustin, S.L., Peterson, S.H., Khanna, S., and Piazza, S.C., 2013, Spectroscopic remote sensing of the distribution and persistence of oil from the Deepwater Horizon spill in Barataria Bay marshes, Remote Sensing of Environment, Volume 129, Pages 210-230. http://dx.doi.org/10.1016/j.rse.2012.10.028 IMAGE_OF_SAMPLE: in the site layout diagram, the subplot location is indicated by the matching number within the parentheses

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126