Article
Environmental Sciences
Kelsey L. Rogers, Samantha H. Bosman, Natalie Wildermann, Brad E. Rosenheim, Joseph P. Montoya, David Hollander, Tingting Zhao, Jeffrey P. Chanton
Summary: Following the Deepwater Horizon oil spill of 2010, post-spill isotopic values of sediment organic carbon reached a new baseline, influenced by river discharge and hydrocarbon seepage. Spatial variations in seafloor organic carbon baseline isotopic values showed a 50% decrease in petrocarbon mass from 2010 to 2014. Despite observed recovery, residual material was still evident in surface sediments seven years after the blowout.
MARINE POLLUTION BULLETIN
(2021)
Article
Geosciences, Multidisciplinary
Mark G. Rowan
Summary: This study uses 3-D, depth-migrated seismic data to analyze the structural architecture and evolution of eastern Mississippi Canyon in the northeastern Gulf of Mexico. The study finds that the movement of salt in this area was driven by a combination of gravity and differential loading forces, which varied in importance and direction over time. These findings are significant for understanding the more complex structures and evolution of the northern Gulf of Mexico.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Environmental Sciences
Yousria S. Soliman, Gilbert T. Rowe, Mary Wicksten, Chih-Lin Wei
Summary: The diversity and distribution of amphipod crustaceans in the Mississippi Canyon were studied. The canyon was found to have higher species richness compared to the adjacent slope, likely due to greater topographic complexity and organic detritus flux from the continental shelf. However, the head of the canyon had lower species diversity.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Barbara K. Linnehan, Forrest M. Gomez, Sharon M. Huston, Adonia Hsu, Ryan Takeshita, Kathleen M. Colegrove, Craig A. Harms, Ashley Barratclough, Alissa C. Deming, Teri K. Rowles, Whitney B. Musser, Eric S. Zolman, Randall S. Wells, Eric D. Jensen, Lori H. Schwacke, Cynthia R. Smith
Summary: The study identified significant cardiac abnormalities in bottlenose dolphins in Barataria Bay impacted by the Deepwater Horizon oil spill, potentially linked to oil exposure. Further research is needed to confirm this association and rule out alternative hypotheses.
Article
Geosciences, Multidisciplinary
Li Wei, Ann Cook, Kehua You
Summary: This study investigates gas hydrates at a site in Green Canyon Block 955 (GC 955) in the Gulf of Mexico. Different data sets suggest different potential methane migration mechanisms, with visible deeply rooted faults and dissolved methane sources indicating potential free gas migration into the hydrate reservoir. Numerical models confirm that free gas flow is required to form the high saturations of gas hydrate observed at GC 955.
Article
Environmental Sciences
Cathrine Hancock, Kevin Speer, Joao Marcos Azevedo Correia de Souza, Steven L. L. Morey
Summary: The dispersion of subsurface Lagrangian floats by eddies was observed directly in DeSoto Canyon, located in the northeastern Gulf of Mexico. The capture and release of floats by variations in eddy structure and intensity contribute to dispersion, affecting the eastern Gulf of Mexico.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Nan Wu, Christopher A-L Jackson, Howard D. Johnson, David M. Hodgson
Summary: Mass-transport complexes (MTCs) are distinctive depositional elements in deep-water systems, with seismic reflection data providing insights into their structure and distribution. The study in the northern Gulf of Mexico evaluated the lithology and petrophysical properties of deeply buried Pleistocene MTCs, highlighting their variability and increasing velocity and resistivity with depth, particularly in the basal shear zones. Detailed analysis of petrophysical data may allow recognition of MTCs, with the basal shear zone potentially being the primary permeability barrier and seal for hydrocarbon accumulations.
Article
Geosciences, Multidisciplinary
C. Austin Clayton, Cornel Olariu
Summary: This study investigates the formation of six large incisions along the northern Gulf of Mexico and suggests that their development was controlled by tectonics rather than eustatic changes. Three possible mechanisms for canyon formation are proposed, all triggered by tectonics. The study also finds that similar incisions align with uplift regions in other parts of the Gulf of Mexico, further supporting the role of tectonism in canyon formation.
Article
Multidisciplinary Sciences
Lixin Qu, Leif N. Thomas, Aaron F. Wienkers, Robert D. Hetland, Daijiro Kobashi, John R. Taylor, Fucent Hsuan Wei Hsu, Jennifer A. MacKinnon, R. Kipp Shearman, Jonathan D. Nash
Summary: This study reveals that the summer land-sea breeze interacts with the river plume fronts in the northern Gulf of Mexico, leading to rapid vertical exchange and ventilation, which may impact the dynamics of the region's dead zone.
NATURE COMMUNICATIONS
(2022)
Review
Environmental Sciences
Tracey T. Sutton, Rosanna J. Milligan, Kendra Daly, Kevin M. Boswell, April B. Cook, Maelle Cornic, Tamara Frank, Kaitlin Frasier, Daniel Hahn, Frank Hernandez, John Hildebrand, Chuanmin Hu, Matthew W. Johnston, Samantha B. Joye, Heather Judkins, Jon A. Moore, Steven A. Murawski, Nina M. Pruzinsky, John A. Quinlan, Andrew Remsen, Kelly L. Robinson, Isabel C. Romero, Jay R. Rooker, Michael Vecchione, R. J. David Wells
Summary: The Deepwater Horizon disaster had unprecedented impacts on the open-ocean ecosystem, affecting the ecology and animal populations significantly. Many animal populations continue to decline a decade later, highlighting their vulnerability and the extent of damage.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Environmental
Chuanmin Hu, Lin Qi, Menghua Wang, Young-Je Park
Summary: Remote sensing and spectroscopy techniques were used to detect and quantify floating debris after Hurricane Katrina, providing a way for post-hurricane environmental assessment. Satellite images and imaging spectroscopy revealed the distribution and types of debris in the northern Gulf of Mexico, suggesting it was mainly composed of driftwood and dead plants mixed with plastics and other materials. The maximal debris area reached a historical record when measured by area in satellite images.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Oceanography
J. A. Valencia-Gasti, V. F. Camacho-Ibar, J. C. Herguera
Summary: In this study, water mass fractions in the deepwater region of the southern Gulf of Mexico were estimated based on samples collected in June 2016. The study identified five dominant water masses and their core contributions, as well as the control of mesoscale eddies on the depth variability of water masses.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Environmental Sciences
Yingjie Li, Samuel V. J. Robinson, Lan H. Nguyen, Jianguo Liu
Summary: The increasing frequency and severity of coastal hypoxia pose a significant threat to marine ecosystems and human well-being. It is crucial to implement continuous and comprehensive monitoring using advanced tools to track spatial and temporal changes in coastal hypoxia. This study utilized satellite imagery and statistical modeling techniques to estimate the spatiotemporal dynamics of hypoxia in the Gulf of Mexico. The results revealed the influence of surface water processes on bottom water hypoxia, highlighting the need for considering time lags in hypoxia studies. Additionally, the study demonstrated the potential of satellite remote sensing for accurate and real-time hypoxia mapping.
REMOTE SENSING OF ENVIRONMENT
(2023)
Article
Environmental Sciences
Norma A. Santibanez-Aguascalientes, Angel Borja, Pedro-Luis Ardisson
Summary: This study investigated the seafloor sustainability in the southern Gulf of Mexico, revealing that human activities exert pressures on the marine environment. The benthic quality was found to be related to water quality, sediment quality, and socioeconomic indicators, leading to uneven distribution of seafloor sustainability in the southern Gulf of Mexico.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Marine
Mark J. Kaiser
Summary: This paper evaluates BSEE's cost estimates for the deepwater US Gulf of Mexico and provides unit cost statistics and cost functions for the region. The study finds significant variations in decommissioning costs among different types of platforms.
SHIPS AND OFFSHORE STRUCTURES
(2022)
Article
Geosciences, Multidisciplinary
A. Huepers, M. J. Ikari, B. Dugan, M. B. Underwood, A. J. Kopf
Article
Multidisciplinary Sciences
Andre Huepers, Marta E. Torres, Satoko Owari, Lisa C. McNeill, Brandon Dugan, Timothy J. Henstock, Kitty L. Milliken, Katerina E. Petronotis, Jan Backman, Sylvain Bourlange, Farid Chemale, Wenhuang Chen, Tobias A. Colson, Marina C. G. Frederik, Gilles Guerin, Mari Hamahashi, Brian M. House, Tamara N. Jeppson, Sarah Kachovich, Abby R. Kenigsberg, Mebae Kuranaga, Steffen Kutterolf, Freya L. Mitchison, Hideki Mukoyoshi, Nisha Nair, Kevin T. Pickering, Hugo F. A. Pouderoux, Yehua Shan, Insun Song, Paola Vannucchi, Peter J. Vrolijk, Tao Yang, Xixi Zhao
Article
Geochemistry & Geophysics
Tamunoisoala LongJohn, Julia K. Morgan, Brandon Dugan
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2018)
Article
Agricultural Engineering
Catherine E. Brewer, Victoria J. Chuang, Caroline A. Masiello, Helge Gonnermann, Xiaodong Gao, Brandon Dugan, Laura E. Driver, Pietro Panzacchi, Kyriacos Zygourakis, Christian A. Davies
BIOMASS & BIOENERGY
(2014)
Article
Geography, Physical
Oded Katz, Julia K. Morgan, Einat Aharonov, Brandon Dugan
Article
Geochemistry & Geophysics
Jacob Siegel, Daniel Lizarralde, Brandon Dugan, Mark Person
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2014)
Article
Geochemistry & Geophysics
Azar K. Hasanov, Brandon Dugan, Michael L. Batzle, Manika Prasad
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2019)
Article
Environmental Sciences
Harsh Biren Vora, Brandon Dugan
WATER RESOURCES RESEARCH
(2019)
Article
Geochemistry & Geophysics
E. J. Screaton, M. E. Torres, B. Dugan, K. U. Heeschen, J. J. Mountjoy, C. Ayres, P. S. Rose, I. A. Pecher, P. M. Barnes, L. J. LeVay
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2019)
Editorial Material
Geochemistry & Geophysics
E. J. Screaton, M. E. Torres, B. Dugan, K. U. Heeschen, J. J. Mountjoy, C. Ayres, P. S. Rose, I. A. Pecher, P. M. Barnes, L. J. LeVay
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2020)
Article
Environmental Sciences
Azar K. Hasanov, Brandon Dugan, Michael L. Batzle
WATER RESOURCES RESEARCH
(2020)
Review
Geochemistry & Geophysics
Aaron Micallef, Mark Person, Christian Berndt, Claudia Bertoni, Denis Cohen, Brandon Dugan, Rob Evans, Amir Haroon, Christian Hensen, Marion Jegen, Kerry Key, Henk Kooi, Volker Liebetrau, Johanna Lofi, Brian J. Mailloux, Renee Martin-Nagle, Holly A. Michael, Thomas Mueller, Mark Schmidt, Katrin Schwalenberg, Elizabeth Trembath-Reichert, Bradley Weymer, Yipeng Zhang, Ariel T. Thomas
Summary: Offshore freshened groundwater (OFG) has been documented in most continental margins worldwide, predominantly within 55 km of the coast and down to a water depth of 100 m. Factors influencing OFG distribution include topography-driven flow, salinization via haline convection, and permeability contrasts. Advances in geochemical measurements and seismic reflection profiling have improved our understanding of OFG, but key knowledge gaps remain regarding its extent, function, and emplacement timing. Future research using isotopic age tracers and joint inversion of electromagnetic and seismic data is essential for addressing these gaps and assessing the potential use of OFG as an unconventional source of water.
REVIEWS OF GEOPHYSICS
(2021)
Article
Geochemistry & Geophysics
G. J. Crutchley, J. Elger, J. Kuhlmann, J. J. Mountjoy, A. Orpin, A. Georgiopoulou, J. Carey, B. Dugan, S. Cardona, S. Han, A. Cook, E. J. Screaton, I. A. Pecher, P. Barnes, K. Huhn
Summary: This study employs a core-log-seismic integration approach to investigate intact sediments and landslide deposits in the Tuaheni Landslide Complex. The results suggest that the basal shear zone of the landslide exploited low shear strength intervals, and the Intra-debris Reflector represents an induced weak layer rather than the landslide's basal shear zone. Free gas accumulation may have played a role in pre-conditioning the slope to failure.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Michael B. Underwood, Brandon Dugan, Sebastian Cardona
Summary: This study investigates the potential influence of clay mineral assemblages on slope stability at two sites on the Hikurangi slope in New Zealand. The results show that detrital smectite dominates the clays, but there are no evident compositional excursions along slip surfaces or weak layers. The presence of smectite decreases in the downstream direction of the East Cape Current, correlating with lower densities of slide scars. However, other factors are likely to determine slip nucleation.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Lisa McNeill, Brandon Dugan, Katerina Petronotis, Kitty Milliken, Jane Francis
SCIENTIFIC DRILLING
(2020)