Twenty-five years after the infamous Exxon Valdez oil spill in Prince William Sound, beaches on the Alaska Peninsula hundreds of kilometers from the incident still harbor small hidden pockets of surprisingly unchanged oil, according to new research being presented here today.
The focus of the study is to learn how oil persists long after a spill. Researchers presenting the work caution that the amount of oil being studied is a trace of what was originally spilled and that results from these sites cannot be simply extrapolated to the entire spill area.
Oil trapped between rocks on a beach in the Gulf of Alaska. New research being presented at the Ocean Sciences Meeting finds that beaches on the Alaska Peninsula hundreds of kilometers from the site of the 1989 Exxon Valdez oil spill still harbor small hidden pockets of oil. Credit: Gail Irvine, USGS
The rocky, high-energy coastlines in the Shelikof Strait, southwest of the spill, contain small remnants of the spill which appear to be protected by a stable boulder and cobble “armor,” says Gail Irvine of the U.S. Geological Survey’s Alaska Science Center. “To have oil there after 23 years is remarkable,” said Irvine. “We have these marked boulders whose movement we’ve been studying for more than 18 years. The oil itself has hardly weathered and is similar to 11-day-old oil.”
The oil was positively identified as that from the Exxon Valdez by chemists at the National Oceanic and Atmospheric Administration’s Auke Bay Laboratory and in Christopher Reddy’s lab at Woods Hole Oceanographic Institution, which specializes in investigating oil spills of all kinds – particularly those which are decades old.
“Very old oil spills can be found to still have oil,” said Reddy. “We were capable of fingerprinting that oil.”
The new findings from this study – about where oil can persist and which chemical compounds in the oil are more and less durable – offer some “silver linings” to the disastrous spill, said Reddy. The researchers are presenting the new research today at the 2014 Ocean Sciences Meeting co-sponsored by the Association for the Sciences of Limnology and Oceanography, The Oceanography Society and the American Geophysical Union.
“One lesson is that if you are responsible for cleaning up a spill, you want to be proactive about cleanup behind the boulders,” said Reddy. Another is that response efforts should try to prevent oil from stranding in these areas where oil may persist for years or decades.
“We are taking advantage of these samples as a natural laboratory,” he said.
Notes for Journalists:
The researchers on this study will present a poster about their work on Wednesday 26 February 2014 at the Ocean Sciences Meeting. The meeting is taking place from 23 – 28 February at the Hawaii Convention Center in Honolulu. For more information for members of the news media, please go to http://www.sgmeet.com/osm2014/media.asp.
Below is an abstract of the presentation. The presentation is part of Session 047: Natural and anthropogenic changes in Coastal Ecosystems and their impact on human welfare. Poster presentations for this session will take place Wednesday 26 February from 4 p.m. to 6 p.m. local Hawaii time in the Poster/Exhibit Hall located in Kamehameha Hall III.
Date: 26 February 2014
Time: 4:00 p.m. to 6:00 p.m.
Location: Poster/Exhibit Hall
Irvine, G. V., U.S. Geological Survey, Alaska Science Center, Anchorage, AK, USA;
Mann, D. H., University of Alaska, Fairbanks, AK, USA;
Carls, M., NOAA, Auke Bay Laboratories, Juneau, AK, USA;
Reddy, C., Woods Hole Oceanographic Institution, Woods Hole, MA, USA;
Nelson, R. K., Woods Hole Oceanographic Institution, Woods Hole, MA, USA.
Twenty-three years after the 1989 Exxon Valdez, spill, oil deposited as mousse persists on rocky shores of national parks in the Gulf of Alaska, distant from the spill origin. Oil persistence is highly dependent on the stability of the boulder armors, some of which have remained intact for 20+ years. Surface oiling has declined to very low levels while subsurface oiling continues relatively unchanged at 4 of the 6 sites. Deployment of passive samplers at 2 sites revealed that some oil constituents are moving into the water. At 4 sites, the oil is only slightly weathered. Comprehensive two-dimensional gas chromatographic (GC x GC) analyses have significantly increased the discrimination of oil compounds; especially pertinent is enhanced resolution of biomarkers, useful for the identification of oil source. Thin-layer chromatography-flame ionization detection analyses indicate no significant accumulation of recalcitrant oxygenated hydrocarbons at 4 of the sites, consistent with only minor oil weathering.
Contact information for the researchers:
Gail Irvine, +1 (907) 268-7606, firstname.lastname@example.org
Chris Reddy, +1 (858) 414-6787, email@example.com
Mary Catherine Adams
+1 (202) 412-0889
Peter Weiss | American Geophysical Union
Sediment from Himalayas may have made 2004 Indian Ocean earthquake more severe
26.05.2017 | Oregon State University
Devils Hole: Ancient Traces of Climate History
24.05.2017 | Universität Innsbruck
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy