- Modality
- NIR
- Category
- vegetation
- Material Type
- PLANT
- Sample ID
- Spartina alterniflora at DWV6a2-0511
- Collection Locality
- Northern Barataria Bay, approximately 58 km south-southeast of New Orleans, Louisiana
- 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 6 field measurements (using an artificial light source) of light brown non-photosynthetic stems of smooth cordgrass (Spartina alterniflora). The measurements were made on May 10, 2011. These spectra were made using an ASD Field Spectrometer 3 (FS3) in reflectance mode, relative to a Spectralon reference panel. The contact probe attachement (an artificial light source with a restricted, 1 cm diameter, field of view) was used to measure the reflectance spectra of bundles of stems. Plant stems in the top 30 cm of the canopy were bunched together. The contact probe was pressed against the optically thick bundle and a spectrum was recorded. Two measurements were made for each bundle before moving the contact probe to a new bundle of stems. 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. The first 50 channels (0.35 - 0.40 microns) in the spectral measurement show relatively high levels of noise. 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 the following publication: 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: None
- X Units
- cm⁻¹
- Y Units
- Absorbance
- Data Points
- 2,126