Makai Ocean Engineering (United States)

An update of the LDEO fCO 2 -residual data product: algorithmic choices improve ocean carbon sink estimates

Thea Hatlen Heimdal, Amanda R. Fay, Abby P. Shaum, Viviana Acquaviva et autres

An update of the LDEO fCO2-Residual data product: algorithmic choices improve ocean carbon sink estimates, Heimdal, Thea Hatlen, Fay, Amanda R., Shaum, Abby P, Acquaviva, Viviana, Bennington, Val, Sharples, Amelie E, Joenson, Nicoline M, McKinley, Galen A

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Autonomous cameras reveal larval reef fish responses to acoustic enrichment and lunar phase

Océane Boulais, Aaron Thode, Corinne Pickering, Natalie Levy et autres

Acoustic enrichment (AE)-the playback of ambient sound from healthy coral reefs-shows promise in attracting fish larvae to degraded or artificial reefs, but previous evaluations have used invasive diver-based sampling techniques, limiting most studies to short deployments in benign and accessible environments. This …

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Coral settlement module designs for scalable reef restoration

Jessica Reichert, Mollie Asbury, Richard Argall, Guanyan Keelung Chen et autres

Abstract The global coral reef crisis has prompted restoration initiatives worldwide. Targeting the coral larval stage is among the most scalable approaches as recruitment operates over large spatial scales. It thus represents one of the best levers for coral population recovery. Active …

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Installation effects on the axial pullout capacity of hollow-bar micropiles in saturated sand

Neda Jamaleddin, G. Haikal, Mohammed Gabr, Richard Argall

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Numerical Investigation of Micropile Group Lateral Capacity for Anchoring Floating Offshore Wind Turbines in Rocky Seabeds

Neda Jamaleddin, Mohammed Gabr, Roy H. Borden, Richard Argall et autres

Floating offshore wind turbines (FOWTs) enable deployment and energy generation in deep waters; however, conventional anchors such as drag embedment anchors (DEAs) are restricted to locations with soft seabed sediments. Additionally, multidirectional anchors are essential for station-keeping in multiline mooring configurations and …

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An update of the LDEO fCO2-Residual method: algorithmic choices improve ocean carbon sink estimates

Thea Hatlen Heimdal, Amanda R. Fay, Abby P. Shaum, Viviana Acquaviva et autres

We evaluate the impact of various algorithmic design choices on reconstruction skill and estimated air-sea CO2 flux using the fCO2-Residual machine learning (ML) method (Bennington et al., 2022a) to reconstruct surface ocean fCO2. We reconstruct fCO2 globally over the period 1982-2023 by …

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Life-cycle analysis of offshore macroalgae production systems in the United States

Hoyoung Kwon, Troy R. Hawkins, George G. Zaimes, Javier Infante et autres

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Numerical study on micropile group behavior supporting fixed bottom marine hydrokinetic devices in sandy seabed

Neda Jamaleddin, Mohammed A. Gabr, Roy H. Borden, Richard Argall et autres

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Modern air-sea flux distributions reduce uncertainty in the future ocean carbon sink

Galen A. McKinley, Val Bennington, Malte Meinshausen, Zebedee Nicholls

Abstract The ocean has absorbed about 25% of the carbon emitted by humans to date. To better predict how much climate will change, it is critical to understand how this ocean carbon sink will respond to future emissions. Here, we examine the …

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Modern air-sea flux distributions reduce uncertainty in the future ocean carbon sink

Galen A. McKinley, Val Bennington, Malte Meinshausen, Zebedee Nicholls

The ocean has absorbed about 25% of the carbon emitted by humans to date. To better predict how much climate will change, it is critical to understand how this ocean carbon sink will respond to future emissions. Here, we examine the ocean …

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Towards a next generation Ocean Bottom Node: Incorporating a 6C motion sensor

Å.S. Pedersen, A. Kritski, Harald Westerdahl, M. Thompson et autres

Summary In this presentation a new single station rotational seismic sensor is introduced. The new sensor enables simultaneous rotational and translational sensing in three orthogonal axes, representing 6 component (or 6C) measurements. Data examples and early results from an offshore field trial …

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Explicit Physical Knowledge in Machine Learning for Ocean Carbon Flux Reconstruction: The pCO 2 ‐Residual Method

Val Bennington, Tomislav Galjanic, Galen A. McKinley

Abstract The ocean reduces human impacts on global climate by absorbing and sequestering CO 2 from the atmosphere. To quantify global, time‐resolved air‐sea CO 2 fluxes, surface ocean pCO 2 is needed. A common approach for estimating full‐coverage pCO 2 is to …

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