Vorticity Recirculation and Asymmetric Generation at a Small Headland With Broadband Currents

Kovatch, Michael; Feddersen, Falk; Grimes, D. J.; MacMahan, Jamie

doi:10.1029/2020jc016639

Cited by 6 publications

(2 citation statements)

References 49 publications

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“…However, no relationship was found between increased DU‐T variability and periods when

\zeta

dropped below

{\zeta }_{\mathrm{c}\mathrm{r}\mathrm{i}\mathrm{t}}

. Positive vorticity south of PS at h = 18 m (Kovatch et al., 2021) would effectively disallow freely propagating diurnal internal waves, potentially contributing to the decreased DU‐T variability directly south of PS.…”

Section: Discussionmentioning

confidence: 99%

Diurnal Variability of Ocean Temperature Off Pt. Sal, Central California

et al. 2023

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Diurnal‐band temperature (DU‐T) variability is investigated over 30 days from measures of temperature over the vertical obtained by 78 moorings deployed in the Santa Monica Basin near Pt. Sal (PS), California. DU‐T variability accounts for 3.6%–23% of the total variability. Vertical empirical orthogonal function mode‐1 DU‐T variability accounts for an average of 86% of the total vertical DU‐T variability at each mooring, is greatest north of PS where its vertical structure is baroclinic, and weakest south of PS where its vertical structure is surface intensified. Spatial complex empirical orthogonal function mode‐1 DU‐T accounts for 73% of the total DU‐T over the region, reveals an onshore baroclinic DU‐T propagation of ∼0.5 m/s, and a previously observed equatorward baroclinic DU‐T propagation of ∼1.9 m/s along the coast north of PS. Dominant vertical mode‐1 diurnal‐band baroclinic velocity (DU‐w) variability at each mooring exhibits a two‐layer structure that is 180° out of phase with maxima near the surface and the bottom, and resembles the DU‐T propagation. DU‐T variability mechanisms include wind‐forced deepening of the surface mixed layer, inertial motions, upwelling, and barotropic and baroclinic tides. Among these concomitant diurnal mechanisms, wind‐driven inertial motions are likely the primary mechanism influencing DU‐T variability during upwelling‐favorable conditions owing to coherence between observed DU‐w and the predicted inertial response to wind‐forcing. Further, spatial mode‐1 DU‐T is correlated and coherent with spatial mode‐1 DU‐w and diurnal wind‐forcing. In addition to describing predominant DU‐T variability patterns, these findings have important implications regarding spatial patterns in biological recruitment, transport, and settlement.

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“…However, no relationship was found between increased DU‐T variability and periods when

\zeta

dropped below

{\zeta }_{\mathrm{c}\mathrm{r}\mathrm{i}\mathrm{t}}

Section: Discussionmentioning

confidence: 99%

Diurnal Variability of Ocean Temperature Off Pt. Sal, Central California

et al. 2023

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“…We output fields with a 30 min average to better resolve the rapid evolution of interactions between internal tidal bores and submesoscale currents. The dense ISDE data set (August–November 2017; Kumar et al., 2021) highlights the prevalence of internal tidal bores (Becherer et al., 2020; Haney et al., 2021; McSweeney, Lerczak, Barth, Becherer, Colosi, et al., 2020; McSweeney, Lerczak, Barth, Becherer, MacKinnon, et al., 2020), topographic wakes (Kovatch et al., 2021), and surf‐zone plumes (Moulton et al., 2021) in this same region. We do not intend this study to serve as a direct comparison with the ISDE observations due to the different time periods (discussed further in Section 6.2).…”

Section: Simulation Setupmentioning

confidence: 99%

Interactions Between Internal Tidal Bores and Submesoscale Currents on the Continental Shelf

2023

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Exchange of Plankton, Pollutants, and Particles Across the Nearshore Region

Moulton

Suanda

Garwood

et al. 2023

Annu. Rev. Mar. Sci.

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Exchange of material across the nearshore region, extending from the shoreline to a few kilometers offshore, determines the concentrations of pathogens and nutrients near the coast and the transport of larvae, whose cross-shore positions influence dispersal and recruitment. Here, we describe a framework for estimating the relative importance of cross-shore exchange mechanisms, including winds, Stokes drift, rip currents, internal waves, and diurnal heating and cooling. For each mechanism, we define an exchange velocity as a function of environmental conditions. The exchange velocity applies for organisms that keep a particular depth due to swimming or buoyancy. A related exchange diffusivity quantifies horizontal spreading of particles without enough vertical swimming speed or buoyancy to counteract turbulent velocities. This framework provides a way to determine which processes are important for cross-shore exchange for a particular study site, time period, and particle behavior. Expected final online publication date for the Annual Review of Marine Science, Volume 15 is January 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Vorticity Recirculation and Asymmetric Generation at a Small Headland With Broadband Currents

Abstract: Steady and tidal (oscillating) flows past topographic features such as headlands and islands lead to wake development and eddy shedding (e.g.,

Cited by 6 publications

References 49 publications

Diurnal Variability of Ocean Temperature Off Pt. Sal, Central California

Diurnal Variability of Ocean Temperature Off Pt. Sal, Central California

Interactions Between Internal Tidal Bores and Submesoscale Currents on the Continental Shelf

Exchange of Plankton, Pollutants, and Particles Across the Nearshore Region

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