Influence of Stratification and Yucatan Current Transport on the Loop Current Eddy Shedding Process

Moreles, Efraín; Zavala‐Hidalgo, Jorge; Martínez‐López, Benjamín; Ruiz‐Angulo, Angel

doi:10.1029/2020jc016315

Cited by 13 publications

(13 citation statements)

References 65 publications

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“…To forecast and visualize the evolution and fate of different oil spill scenarios at pre-defined locations, we employ several international operational models: the HYbrid Coordinate Ocean Model (HYCOM), the Regional Ocean Modeling System (ROMS), the Nucleus for European Modelling of the Ocean (NEMO), the Navy Coastal Ocean Model (NCOM), the Global Forecasting System model (GFS, NCEI-NOAA), and the Weather Research and Forecasting (WRF) and WRF-Chem for the atmosphere and WAVEWATCHIII for waves. An analysis of the differences and similarities among the modeling results has helped us understand their capabilities and guided their use for development of an ensemble-based system to generate oil spill scenarios and a probabilistic forecast system (Meza-Padilla et al, 2019;Duteil et al, 2019;Gómez-Valdivia and Parés-Sierra, 2020;Mazlo et al, 2020;Moreles et al, 2020;Guerrero et al, 2020;Damien et al, 2021). These et al, 2021).…”

Section: Hydrocarbon Spillsmentioning

confidence: 99%

Ocean Monitoring and Prediction Network for the Sustainable Development of the Gulf of Mexico and the Caribbean

Herguera¹,

Peters²,

Sheinbaum³

et al. 2023

Oceanog

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The need to understand and forecast disasters driven by anthropogenic and natural forces in the Gulf of Mexico and to support management responses to hazardous events led policymakers, scientists, and industry representatives in Mexico to launch an ocean observation and modeling project (2015–2023) aimed at collecting multi-layered baseline information and continuous monitoring of the ocean environment across the southern Gulf of Mexico. The observational network and modeling efforts, led by the Consorcio de Investigación del Golfo de México (Research Consortium for the Gulf of Mexico, CIGoM), include developing a marine hazard warning system to investigate multiple stressors that are altering the state and health of this large marine ecosystem and its coastal communities. This warning system is intended to aid in the establishment of national contingency plans and mitigate the impacts of extreme events and long-term ocean trends. Stressors include hydrocarbon spills, tropical cyclones, marine heatwaves, long-term ocean surface warming, harmful algal blooms, and massive Sargassum landings.

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Section: Hydrocarbon Spillsmentioning

confidence: 99%

Ocean Monitoring and Prediction Network for the Sustainable Development of the Gulf of Mexico and the Caribbean

Herguera¹,

Peters²,

Sheinbaum³

et al. 2023

Oceanog

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“…The renewed interest in thermodynamically-active rotating shallow-water modeling 5,6,13,15,20,35,[71][72][73][74] motivated this work, which presented extended rotating shallow-water theories with thermodynamics and geometry. With a focus on the ocean mixed-layer, the topmost part of the ocean, a general model was introduced and interpreted as such, considering in addition several submodels, ranging from the shallow-water equations themself.…”

Section: B the Il 0+ Modelmentioning

confidence: 99%

“…This paper is motivated by renewed interest 5,6,13,15,20,35,[71][72][73][74] in "thermal shallow-water modelling" of geophysical flows. Due to Pedro Ripa's investigation of its geometric structure and stability properties, [57][58][59][60]62 the core model has been known to many 10,43,52,65 as Ripa's model.…”

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confidence: 99%

Extended shallow-water theories with thermodynamics and geometry

Beron-Vera

2021

Preprint

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Driven by growing momentum in two-dimensional geophysical flow modeling, this paper introduces a general family of "thermal" rotating shallow-water models. The models are capable of accommodating thermodynamic processes, such as those acting in the ocean mixed layer, by allowing buoyancy to vary in horizontal position and time as well as with depth, in a polynomial fashion up to an arbitrary degree. Moreover, the models admit Euler-Poincare variational formulations and possess Lie-Poisson Hamiltonian structure. Such a geometric property provides solid fundamental support to the theories described with consequences for numerical implementation and the construction of unresolved motion parametrizations. In particular, it is found that stratification halts the development of small-scale filament rollups recently observed in a popular model, which, having vertically homogeneous density, represents a special case of the models presented here.

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“…However, these studies, as well as those using more complex numerical models and observations, have also shown that the eddy separation period can be modulated by external factors. Several studies emphasized the importance of the GoM inflows and outflows such as their relative magnitude (Pichevin & Nof, 1997;Weisberg & Liu, 2017;Moreles et al, 2021), their fluctuations (Oey et al, 2003;Sturges et al, 2010), their stratification (Moreles et al, 2021) and their vorticity (Candela et al, 2002;Oey, 2004). Vorticity was found to be modulated by mesoscale activity, such as cyclones in the GoM that can either block the invasion of the LC in the Gulf (Schmitz, 2005;Zavala-Hidalgo et al, 2006) or favor the release of LCE (Cheŕubin et al, 2006), as well as Caribbean Anticyclones (Murphy et al, 1999;Candela et al, 2002;Oey et al, 2003;Athieé t al., 2012;Garcia-Jove et al, 2016;Ntaganou et al, ), or deep eddies (Welsh & Inoue, 2000;Oey, 2008) that influence the dynamic of the LC.…”

Section: Introductionmentioning

confidence: 99%

Impact of upstream variability on the Loop Current dynamics in numerical simulations of the Gulf of Mexico

et al. 2023

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The Loop Current (LC), which is the main mesoscale dynamic feature of the Gulf of Mexico (GoM), has a major impact on the circulation and its variability in the interior Gulf. The LC is a highly variable and dynamic feature. It changes shape from a short jet connecting the two openings of the GoM in an almost straight line ("retracted phase") to a long loop invading most of the eastern part of the GoM ("extended phase"). When it is in the extended phase, it can shed large anticyclonic eddies, called Loop Current Eddies, which then migrate to the western GoM. In this study, the processes controlling the LC dynamics are investigated using two multi-decadal simulations of the Gulf of Mexico HYbrid Coordinate Ocean Model differing in their open boundary conditions (BCs) and altimetry-derived gridded fields. The LC in the simulation with BCs derived from monthly climatology state variables frequently remains in its retracted phase significantly longer than observed. In contrast, the duration of the retracted phase is notably shorter in the simulation in which the BCs have realistic daily variability. By examining the flow properties through the Yucatan Channel from which the LC originates, we find that increased intensity of this current and a westward shift of the mean core is associated with the LC transitions from the retracted to the extended phase. This transition is accompanied by an increase of both cyclonicity of the flow in the west and anticyclonicity in the east of the core of this jet. Moreover, the number of anticyclonic eddies entering in the GoM through the Yucatan Channel is significantly higher when the LC extends in the GoM. Consequently, this study demonstrates the importance of realistic flow variability at the lateral boundaries for accurate simulation of the LC system in a model, and reveals characteristics of the upstream flow associated with different LC behavior that can potentially aid in forecasting the LC system.

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Influence of Stratification and Yucatan Current Transport on the Loop Current Eddy Shedding Process

Cited by 13 publications

References 65 publications

Ocean Monitoring and Prediction Network for the Sustainable Development of the Gulf of Mexico and the Caribbean

Ocean Monitoring and Prediction Network for the Sustainable Development of the Gulf of Mexico and the Caribbean

Extended shallow-water theories with thermodynamics and geometry

Impact of upstream variability on the Loop Current dynamics in numerical simulations of the Gulf of Mexico

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