A new study provides a composite picture of the environmental distribution of oil and gas from the 2010 Deepwater Horizon
spill in the Gulf of Mexico. It amasses a vast collection of available
atmospheric, surface and subsurface chemical data to assemble a "mass
balance" of how much oil and gas was released, where it went and the
chemical makeup of the compounds that remained in the air, on the
surface, and in the deep water.
The study, "Chemical data quantify Deepwater Horizon hydrocarbon flow rate and environmental distribution," is published online in the Proceedings of the National Academy of Sciences.
The lead author, NOAA research chemist Thomas Ryerson, assembled an
all-star team of 14 scientists from diverse backgrounds and
organizations including academia, private research institutions and
federal labs, all of whom played important roles collecting and
analyzing data during the spill. Four scientists from the Woods Hole
Oceanographic Institution (WHOI) were integral to the paper:
environmental engineer Richard Camilli, and marine chemists Elizabeth
Kujawinski, Christopher Reddy, and Jeffrey Seewald. The other nine
authors hailed from Texas A&M University, the University of
California at Santa Barbara and at Irvine, the University of Miami, and
the University of Colorado.
"This paper is exciting for several reasons," said Reddy, a WHOI
senior scientist who specializes in oil spills. "This is a study based
on data from the Gulf and not on models, and it tells the big picture of
this spill just 18 months after the leak was capped -- a remarkably
short amount of time." Reddy further emphasized the importance of the
array of scientists Ryerson assembled to help tell this story. "He
brought together key players to analyze relatively new data that came
from an impressive array of sampling techniques."
In addition to hydrocarbon data Ryerson collected from overflights on
NOAA P-3 planes and other air samples from research vessels, the paper
incorporates data collected by a remotely operated vehicle (ROV) using a
unique device developed by Seewald to sample the leaking fluid at the
well, as well as data from the WHOI-designed and -built autonomous
underwater vehicle Sentry outfitted with a miniaturized mass
spectrometer developed by Camilli. Additionally, it uses many water
samples from various depths taken and analyzed by Reddy, Camilli,
Kujawinski, and others, using finely-tuned analytical instruments and
techniques to track minute amounts of the oil and gas components.
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