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Simulating Deep Oil Spills Beyond the Gulf of Mexico

  • Claire B. ParisEmail author
  • Ana C. Vaz
  • Igal Berenshtein
  • Natalie Perlin
  • Robin Faillettaz
  • Zachary M. Aman
  • Steven A. Murawski
Chapter

Abstract

As deep-sea oil exploitation increases worldwide, the probability of another Deepwater Horizon (DWH) blowout also increases. The DWH disaster directly impacted the coastal communities of the Gulf of Mexico (GoM) with 11 deaths and the release of 172.2 million gallons of gas-saturated oil, covering over 1000 miles of coastline and contaminating an estimated 300,000 million cubic meters of GoM water. In the aftermath of the DWH blowout, the question of what a similar event would look like outside the GoM is of fundamental importance. Anticipating the extent and potential environmental impact of major spills in other locations becomes important for effective oil preparedness and response, including coordination of emergency response between neighboring countries. Avoiding deep-sea drilling in environmentally sensitive and some of the world’s most biodiverse and productive fishing areas is also of upmost importance. The west coasts of Cuba and West Africa may be two of the most environmentally sensitive areas across the North Atlantic, yet exploitation of deepwater oil reservoirs has already started or is imminent. Northwest Cuba holds abundant coral reefs characterized by uniquely high diversity and fish biomass, and the region is also home of multi-species spawning aggregations, crucial for the persistence of fish populations. In addition, this area contains Cuba’s most important lobster fishery grounds. A major oil spill occurring in NW Cuba is thus likely to have deleterious impacts on the biodiversity and seafood resources of the region. The West African coastal upwelling system is an extremely productive area, harboring one of the world’s main “hot spots” in terms of fish abundance and biomass. This important system is most likely also a crucial mechanism regulating the climate, and an oil spill in this area could thus have severe local and global impacts.

Here we simulate a DWH-like spill in two deepwater prospect blocks offshore Cuba and Senegal, West Africa, and evaluate their extent and impact against the DHW oil spill hindcast as a benchmark. These two hypothetical spills are not locally contained and are both severe, yet we find distinctive differences between their impact on the coastline, the seafloor, and the water column. Overall, the Senegal deep blowout scenario seems to be the most impactful with the highest sedimented and beached oil mass; the Cuba deep blowout scenario is the second worst, with the highest impact in terms of oiled area and volume. In this context, our study demonstrates that if another DWH occurred in a different region, poorly regulated emergency responses for international waters at the time of the spill could result in more detrimental impacts on marine ecosystems and coastal communities compared to the DWH. Here, we bring forward, quantify, and visualize the possible outcomes of another mega-spill similar to the DWH in two strategic locations to increase the awareness of decision-makers and the public to such implications. Since oil exploration is not expected to decrease in the near future, we urge governments to focus on establishing international agreements protecting sensitive marine resources and areas.

Keywords

World Ocean Ultra-deep exploration Deep-sea blowout Oil spill modeling Deep-sea blowout Cuba Senegal West Africa Cayar Canyon Pelagic fisheries Upwelling Productivity Marine biodiversity Spawning aggregations Ecosystem impact 

Notes

Acknowledgments

This research was made possible by a grant from the Gulf of Mexico Research Initiative/C-IMAGE II-III to Steve Murawski. Data are publicly available through the Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC) at https://data.gulfresearchinitiative.org/data/R6.x805.000:0060 and https://data.gulfresearchinitiative.org/data/R6.x805.000:0059.

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Claire B. Paris
    • 1
    Email author
  • Ana C. Vaz
    • 1
  • Igal Berenshtein
    • 1
  • Natalie Perlin
    • 1
  • Robin Faillettaz
    • 1
  • Zachary M. Aman
    • 2
  • Steven A. Murawski
    • 3
  1. 1.University of Miami, Rosenstiel School of Marine and Atmospheric ScienceMiamiUSA
  2. 2.The University of Western Australia, Fluid Science and Resources Division, Department of Chemical EngineeringPerthAustralia
  3. 3.University of South Florida, College of Marine ScienceSt. PetersburgUSA

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