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Region 10: California-Great Basin

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Filter Total Items: 144
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Year Published: 2021

Expanding the repertoire of electron acceptors for the anaerobic oxidation of methane in carbonates in the Atlantic and Pacific Ocean

Authigenic carbonates represent a significant microbial sink for methane, yet little is known about the microbiome responsible for the methane removal. We identify carbonate microbiomes distributed over 21 locations hosted by seven different cold seeps in the Pacific and Atlantic Oceans by carrying out a gene-based survey using 16S rRNA- and ...

Beckmann, Sabrina; Farag, Ibrahim F.; Zhao, Rui; Christman, Glenn; Prouty, Nancy G.; Biddle, Jennifer F.

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Year Published: 2021

Potential use of the benthic foraminifers Bulimina denudata and Eggerelloides advenus in marine sediment toxicity testing

The benthic foraminifers Bulimina denudata and Eggerelloides advenus are commonly abundant in offshore regions in the Pacific Ocean, especially in waste-discharge sites. The relationship between their abundance and standard macrofaunal sediment toxicity tests (amphipod survival and sea urchin fertilization) as well as sediment...

McGann, Mary

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Year Published: 2021

The making of the NEAM Tsunami Hazard Model 2018 (NEAMTHM18)

The NEAM Tsunami Hazard Model 2018 (NEAMTHM18) is a probabilistic hazard model for tsunamis generated by earthquakes. It covers the coastlines of the North-eastern Atlantic, the Mediterranean, and connected seas (NEAM). NEAMTHM18 was designed as a three-phase project. The first two phases were dedicated to the model development and hazard...

Basili, Roberto; Brizuela, Beatriz; Herrero, Andre; Iqbal, Sarfraz; Lorito, Stefano; Maesano, Francesco Emanuele; Murphy, Shane; Perfetti, Paolo; Romano, Fabrizio; Scala, Antonio; Selva, Jacopo; Taroni, Matteo; Tiberti, Mara Monica; Thio, Hong Kie; Tonini, R.; Volpe, Manuela; Glimsdal, Sylfest; Harbitz, Carl B.; Lovholt, Finn; Baptista, Maria Ana; Carrilho, Fernando; Matias, Luis M. A.; Omira, Rachid; Babeyko, Andrey; Hoechner, Andreas; Gurbuz, Mucahit; Pekcan, Onur; Yalciner, A.; Canals, Miquel; Lastras, Galderic; Agalos, Apostolos; Papadapoulos, Gerassimo; Triantafyllou, Ioanna; Benchekroun, Sabah; Jaouadi, Hedi Agrebi; Abdallah, Samir Ben; Bouallegue, Atef; Hamdi, Hassene; Oueslati, Foued; Amato, A.; Armigliato, Alberto; Behrens, Jörn; Davies, Gareth; Di Bucci, Daniela; Dolce, Mauro; Geist, Eric L.; Gonzalez Vida, Jose Manuel; Gonzalez, Mauricio; Sanchez, Jorges Macias; Meletti, C.; Sozdinler, Ceren Ozer; Pagani, Marco; Parsons, Tom; Polet, Jascha; Power, William; Sorensen, Mathilde B.; Zaytsev, Andrey

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Year Published: 2021

The role of surges during periods of very shallow water on sediment transport over tidal flats

Periods of very shallow water (water depth in the order of 10 cm) occur daily on tidal flats because of the propagation of tides over very gently sloping beds, leading to distinct morphodynamical phenomena. To improve the understanding of the characteristics of velocity and suspended sediment concentration (SSC) surges and their contribution to...

Zhang, Qian; Gong, Zheng; Zhang, Changkuan; Lacy, Jessica R.; Jaffe, Bruce E.; Xu, Beibei; Chen, Xindi

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Year Published: 2021

Deepwater debrites and linked megaturbidites in confined basins: An example from the Onnuri Basin, East Sea of Korea

We analyzed data from seven piston cores, multi-channel seismic-reflection (MCS) and chirp profiles, and multibeam echosounder (MBES) data to study the distribution, emplacement time, sedimentary facies, and depositional processes of sediment-gravity-flow deposits in the Onnuri Basin, a confined basin in the East Sea. These data reveal that debris...

Cukur, Deniz; Um, In-Kwon; Chun, Jong-Hwa; Lee, Gwang-Soo; Kong, Gee-Too; Johnson, Samuel Y.; Horozal, Senay

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Year Published: 2021

Preconditioning by sediment accumulation can produce powerful turbidity currents without major external triggers

Turbidity currents dominate sediment transfer into the deep ocean, and can damage critical seabed infrastructure. It is commonly inferred that powerful turbidity currents are triggered by major external events, such as storms, river floods, or earthquakes. However, basic models for turbidity current triggering remain poorly tested, with few...

Bailey, Lewis; Clare, Michael; Rosenberger, Kurt J.; Cartigny, Matthieu J.B.; Talling, Peter J.; Paull, Charles K.; Gwiazda, Roberto; Parsons, Daniel; Simmons, Stephen; Xu, Jingping; Haigh, Ivan; Maier, Katherine L.; McGann, Mary; Lundsten, Eve M.

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Year Published: 2021

Characterization of deep-sea coral and sponge communities in Greater Farallones National Marine Sanctuary: Point Arena South Essential Fish Habitat Conservation Area and New Amendment 28 Areas

This report summarizes samples collected during a remotely operated vehicle (ROV) cruise conducted in October 2019 on board E/V Nautilus. Areas sampled in Greater Farallones National Marine Sanctuary included areas proposed for fisheries management zoning in the Point Arena South (PAS) Essential Fish Habitat Conservation Area (EFH). Dive planning...

Graiff, Kaitlin; Roletto, Jan; Tezak, Sage; Williams, Gary E.; Cochrane, Guy R.

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Year Published: 2021

A 100-km wide slump along the upper slope of the Canadian Arctic was likely preconditioned for failure by brackish pore water flushing

Exploration of the continental slope of the Canadian Beaufort Sea has revealed a remarkable coalescence of slide scars with headwalls between 130 and 1100 m water depth (mwd). With increased depth, the scars widen and merge into one gigantic regional slide scar that is more than 100 km wide below ~1100 mwd. To understand the...

Paull, C.K.; Dallimore, S.R.; Caress, D.W.; Gwiazda, R.; Lundsten, E.; Anderson, K.; Melling, H.; Jin, Y.K.; Duchesne, M.J.; Kang S-G.; Kim, S.; Riedel, M.; King, E.L.; Lorenson, Thomas

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Year Published: 2021

Long-term changes in kelp forests in an inner basin of the Salish Sea

Kelp forests form an important biogenic habitat that responds to natural and human drivers. Global concerns exist about threats to kelp forests, yet long-term information is limited and research suggests that trends are geographically distinct. We examined distribution of the bull kelp Nereocystis luetkeana over 145 years in South Puget...

Berry, H.D.; Mumford, T.F.; Calloway, M.; Ferrier, L.; Christiaen, B.; vanArendonk, Nathan R.; Grossman, Eric E.; Dowty, P.

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Year Published: 2021

The contribution of currents, sea-swell waves, and infragravity waves to suspended-sediment transport across a coral reef-lagoon system.

Coral reefs generate substantial volumes of carbonate sediment, which is redistributed throughout the reef‐lagoon system. However, there is little understanding of the specific processes that transport this sediment produced on the outer portions of coral reefs throughout a reef‐lagoon system. Furthermore, the separate contributions of currents,...

Pomeroy, Andrew; Storlazzi, Curt; Rosenberger, Kurt J.; Lowe, Ryan; Hansen, Jeff; Buckley, Mark L.

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Year Published: 2021

The application of ensemble wave forcing to quantify uncertainty of shoreline change predictions

Reliable predictions and accompanying uncertainty estimates of coastal evolution on decadal to centennial time scales are increasingly sought. So far, most coastal change projections rely on a single, deterministic realization of the unknown future wave climate, often derived from a global climate model. Yet, deterministic projections do not...

Vitousek, Sean; Cagigal, Laura; Montaño, Jennifer; Rueda, Ana; Mendez, Fernando; Coco, Giovanni; Barnard, Patrick L.

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Year Published: 2021

Can modeling the geologic record contribute to constraining the tectonic source of the AD 1755 Great Lisbon earthquake?

The precise location of the seismic source of 1755 CE Great Lisbon earthquake is still uncertain. The aim of this work is to use an onland sedimentary record in southern Portugal to test and validate seismic sources for the earthquake. To achieve this, tsunami deposit thicknesses from over 150 cores collected at Salgados in southern Portugal were...

Dourado, Francisco; Costa, Pedro JM; La Selle, Seanpaul; Andrade, Caesar; Bosnic, Ivana; Gelfenbaum, Guy R.