Oiled marsh dry DWO-3-BAT-09

Spectrum Details

Modality

NIR

Category

man-made

Material Type

non-photosynthetic vegetation coated with weathered oil

Sample ID

oil-coated and non-photosynthetic vegetation at site DWO-3-BAT-09

Collection Locality

Barataria Bay, Louisiana

Spectral Purity

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

Sample Description

Weathered oil from the Deepwater Horizon spill coating marsh plants. The spectrum is an average of 25 measurements made of oil-coated and oil-free Juncus roemerianus and Spartina alterniflora. The oil-free plants in the area were in a dry, non-photosynthetic state. The area measured was a 1 meter wide strip of mixed oiled and non-oiled vegetation at the interface between the black/dark brown oiled plants at the shoreline and green plants (only oiled at the base of their stems) deeper in the marsh. The spectrum was measured in the field on August 13, 2010, approximately 5 meters inland from the measurement of another area (Oiled marsh DWO-3-BAT-09) which had 100% cover of oil-coated vegetation. The reflectance spectrum has absorption features centered near 1.72 and 2.30 microns arising from C-H bonds in weathered oil. The site DWO-3-BAT-09 is described in: Kokaly, R.F., Heckman, David, Holloway, JoAnn, Piazza, Sarai, Couvillion, Brady, Steyer, G.D., Mills, Christopher, and Hoefen, T.M., 2011, Shoreline surveys of oil-impacted marsh in southern Louisiana, July to August 2010: U.S. Geological Survey Open-File Report 2011�1022, 124 p. Available at http://pubs.usgs.gov/of/2011/1022/ This spectrum, labeled as "Oiled-Dry-Marsh", was published and described 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:

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126