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Petroleum, NASA, and a 21 st Century Oil Spill Response. - PowerPoint PPT Presentation
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Ira Leifer1, Rob Green2, Randy Albertson3, Eliza Bradley1, Roger Clark4, Philip Dennison5, Michael Eastwood2, Michael Goodman3, Anthony Guillory3, Todd
Hoefen4, Ray Kokaly4, Bill Lehr6, Scott Matheson5, Ian McCubbin7, Elijah Ramsey4, Dar Roberts1, Gregg Swayze4, Bruce Tagg3, Susan Ustin8, and the AVIRIS team
Petroleum, NASA, and a 21st Century Oil Spill
Response
flattened
AP Photo/Gerald Herbert
Heterogeneity of Oil Ecosystem Impact
Scientific Basis: Vegetation Ecosystem Properties with Spectroscopy
Species Type 90% accurate
Species Fractional Cover (Quercus agrifolia)
Full spectrum measurement (380- 2500 nm) allows derivation of vegetation species and functional type and physiological condition
Dennison and Roberts, 2003, Remote Sens. Environ.
Most vulnerable coastline (including calibration sites) surveyed with acceptable to zero cloud cover, including oil slick imaging.
thanks to the dedicated NASA-led interagency teamand
no small amount of weather (clouds) luck
May 6May 10May 11May 13May 17May 18May 19May 20May 23May 24May 25
May 2010 AVIRIS Collection with ER-2
May 6May 10May 11May 13May 17May 18May 19May 20May 23May 24May 25
July 2010 AVIRIS Collection with Twin Otter
May 6May 10May 11May 13May 17May 18May 19May 20May 23May 24May 25
May-Sept. 2010 AVIRIS Collection!!!
0.3 trillion m2 mapped in 4 billion pixels over 38 flight days
Key Scientific Coastal Ecosystem Questions
Which coastal vegetation types/communities are most heavily impacted by oil?
Can oil in the canopy understory be detected directly (i.e., due to its spectroscopic signature) or only indirectly by vegetation stress indicators?
Given different mitigation strategies, what are the most effective in reducing adverse oil impacts?
Can knowledge of past distribution of plant types/communities aid recovery and remediation efforts and/or aid in targeting priority sites for recovery efforts?
Pre-Oil Ecosystem Ground Measurements
Oil impacted Spartina alternifolia in Barataria Bay
AVIRIS flight coverage in May and location of field sites
Species Dominants: NW R13
1650, 830, 677 RGB Wetland Dominants
• Developed a spectral library using USGS CRMS sites
• Selected optimal endmembers and mapped with MESMA the wetland dominants
• Four species mapped included two spartina, aphragmites, and a distichlis
AVIRIS ecosystem species mapping
Species Dominants: SE R131650, 830, 677 RGB Wetland Dominants
• Spartina more dominant towards Northwest
• Phragmites dominates towards southeast
• Distichlis is abundant in zones with high reflectance due to low stature
AVIRIS Ecosystem Impact: First Results