The surf zone heat budget: The effect of wave heating

Sinnett, Gregory; Feddersen, Falk

doi:10.1002/2014gl061398

Cited by 51 publications

(45 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, other potential exchange mechanisms such as winds [e.g., Fewings et al, 2008], tides [e.g., Lentz and Fewings, 2012], or internal waves [e.g., Sinnett and Feddersen, 2014;Suanda et al, 2014] are expected to generally have much larger alongshore length scales and longer time scales than those observed. Farther offshore of the surfzone, Stokes-drift-driven exchange [e.g., Lentz et al, 2008;Suanda and Feddersen, 2015] or other inner-shelf processes may become important.…”

Section: Surfzone/inner-shelf Exchange Mechanismsmentioning

confidence: 99%

“…While shoreline-source tracers are first transported and The surfzone and inner-shelf are governed by drastically different dynamics. The surfzone is dominated by breaking-wave-driven currents [e.g., Thornton and Guza, 1986] and horizontal eddies [e.g., Peregrine, 1998;Clark et al, 2012], whereas the inner-shelf is forced by a combination of wind, tides, buoyancy, and both surface and internal waves [e.g., Lucas et al, 2011;Lentz and Fewings, 2012;Kumar et al, 2014;Sinnett and Feddersen, 2014]. The intersection of, and exchange between, these dynamically different regions is particularly complex.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Surfzone to inner‐shelf exchange estimated from dye tracer balances

et al. 2015

Self Cite

View full text Add to dashboard Cite

Surfzone and inner‐shelf tracer dispersion are observed at an approximately alongshore‐uniform beach. Fluorescent Rhodamine WT dye, released near the shoreline continuously for 6.5 h, is advected alongshore by breaking‐wave‐ and wind‐driven currents, and ejected offshore from the surfzone to the inner‐shelf by transient rip currents. Novel aerial‐based multispectral dye concentration images and in situ measurements of dye, waves, and currents provide tracer transport and dilution observations spanning about 350 m cross‐shore and 3 km alongshore. Downstream dilution of near‐shoreline dye follows power law decay with exponent −0.33, implying that a tenfold increase in alongshore distance reduces the concentration about 50%. Coupled surfzone and inner‐shelf dye mass balances close, and in 5 h, roughly half of the surfzone‐released dye is transported offshore to the inner‐shelf. Observed cross‐shore transports are parameterized well ( , best fit slope ) using a bulk exchange velocity and mean surfzone to inner‐shelf dye concentration difference. The best fit cross‐shore exchange velocity is similar to a temperature‐derived exchange velocity on another day with similar wave conditions. The magnitude and observed inner‐shelf dye length scales, time scales, and vertical structure indicate the dominance of transient rip currents in surfzone to inner‐shelf cross‐shore exchange during moderate waves at this alongshore‐uniform beach.

show abstract

Section: Surfzone/inner-shelf Exchange Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surfzone to inner‐shelf exchange estimated from dye tracer balances

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…Here ∂ / ∂y of alongshore heat fluxes are assumed to be negligible. This assumption of alongshore uniformity is valid for the time‐averaged alongshore momentum balance on beaches with alongshore uniform bathymetry and nearly incident wave field (Feddersen et al, ; Feddersen & Guza, ) and has been applied successfully to other heat budgets (e.g., Austin, ; Austin & Lentz, ; Sinnett & Feddersen, ). This assumption is discussed in section .…”

Section: Nearshore Heat Budgetmentioning

confidence: 99%

“…Air‐sea fluxes can establish diurnal cross‐shore thermal exchange (e.g., Molina et al, ) and affect stratification and mixing (e.g., Price et al, ). Viscous dissipation of breaking wave energy is a unique surfzone heat source (Sinnett & Feddersen, ; Wei & Dalrymple, ), whereas breaking wave generated surfzone foam increases albedo (surface reflectivity) by as much as 8× (Sinnett & Feddersen, ) reducing shortwave radiation in the surfzone. The relative effects of wave heating and breaking wave albedo cooling depend on many factors including beach slope, wave height, latitude, season, and cloudiness (Sinnett & Feddersen, ).…”

Section: Introductionmentioning

confidence: 99%

The Nearshore Heat Budget: Effects of Stratification and Surfzone Dynamics

Sinnett

Feddersen

2019

JGR Oceans

Self Cite

View full text Add to dashboard Cite

Temperature variability in the nearshore (from ≈ 6-m depth to the shoreline) is influenced by many processes including wave breaking and internal waves. A nearshore heat budget resolving these processes has not been considered. A 7-month experiment at the Scripps Institution of Oceanography Pier (shoreline to 6-m depth) measured temperature and surface and cross-shore heat fluxes to examine a nearshore heat budget with fine cross-shore spatial (≈ 20 m) and temporal (5 day to 4 h) resolution. Winds, waves, air and water temperature, and in particular, pier end stratification varied considerably from late Fall to late Spring. The largest heat flux terms were shortwave solar radiation and baroclinic advective heat flux both varying on tidal time scales. The net heat flux is coherent and in phase with the nearshore heat content change at diurnal and semidiurnal frequencies. The binned mean heat budget has squared correlation R 2 = 0.97 and best-fit slope of 0.76. Including an elevated breaking wave albedo parameterization reduced the residual heat flux and improved the best-fit slope. Baroclinic and barotropic advective heat fluxes have significant noise, and removing them from the heat budget improves the best-fit slope when stratification is weak. However, when daily mean stratification is large, baroclinic advective heat flux dominates variability and is required to capture large (≈ 3 • C h −1 ) internal wave events. At times, large heat budget residuals highlight neglected heat budget terms, pointing to surfzone alongshore advection of temperature anomalies. Key Points:• A high resolution nearshore (shoreline to 6-m depth) heat budget, including the surfzone, closes at subtidal and tidal time scales • Baroclinic advective and solar heat fluxes are the strongest terms and their relative contributions depend on mean stratification • Residual in the heat budget is partially due to neglected alongshore advection of temperature anomalies

show abstract

“…Different observations on the temporal variability of the surf zone show vertical stratification (e.g. van Haren et al, ; Lerczak, Winant, & Hendershott, ; Sinnett & Feddersen, ). Nevertheless, strong breaking wave‐induced vertical mixing in the surf zone suggests weaker temperature stratification.…”

Section: Introductionmentioning

confidence: 97%

Thermal response of demersal and pelagic juvenile fishes from the surf zone during a heat‐wave simulation

et al. 2019

View full text Add to dashboard Cite

Experimental measurements were collected in the laboratory to evaluate the maximum thermal limit and thermal plasticity of Neotropical juvenile fish with different life habitats (demersal and pelagic) from surf zone in response to a “heat‐wave experiment”. Trials were conducted using two temperature acclimations (Ta), including the current average temperature of Southeastern Brazil (Ta: 14 days at 25°C) and the “heat‐wave experiment” (Ta: 14 days at 30°C), simulating a heat‐wave event that occurs when the daily maximum temperature of more than five consecutive days exceeds the average maximum temperature by 5°C. Typical species of the surf zone were used: the demersal White sea catfish (Genidens barbus) and Gulf kingcroaker (Menticirrhus littoralis), and the pelagic fishes Great pompano (Trachinotus goodei) and Long‐fin mullet (Mugil brevirostris). The thermal range and plasticity values for the both life‐habitats species were verified through current and heat‐wave acclimation. The thermal tolerance at high temperatures (CTmax) of these species differed between Ta, habitat and species. Fish showed a species‐specific response to temperature increase, regardless of their habitat even under similar abiotic conditions. However, at the heat‐wave simulation, the demersal fish presented a greater thermal plasticity in relation to the pelagic fish. Despite the higher thermal tolerance when exposed to heat‐wave simulation, all fish species displayed a lower thermal edge safety that is markedly close to their maximum thermal limits.

show abstract

The surf zone heat budget: The effect of wave heating

Cited by 51 publications

References 44 publications

Surfzone to inner‐shelf exchange estimated from dye tracer balances

Surfzone to inner‐shelf exchange estimated from dye tracer balances

The Nearshore Heat Budget: Effects of Stratification and Surfzone Dynamics

Thermal response of demersal and pelagic juvenile fishes from the surf zone during a heat‐wave simulation

Contact Info

Product

Resources

About