Grimes, Derek J.; Feddersen, Falk; Kumar, Nirnimesh (2020). Data from: Tracer Exchange Across the Stratified Inner-shelf Driven by Transient Rip-Currents and Diurnal Surface Heat Fluxes. In Transient Rip-Currents on the Stratified Inner-shelf. UC San Diego Library Digital Collections. https://doi.org/10.6075/J0WM1BSJ

The exchange of tracers across the stratified inner-shelf is fundamental to coastal oceanography. In many locals, cross-shore exchange has been linked to baroclinic cross-shore temperature gradient set up through a depth dependent response to surface heat fluxes (e.g., Monismith et al., 2006). The diurnal surface heat-flux cycle induces diurnal thermally driven exchange (Monismith et al., 1990; Molina et al., 2014) and diurnally modulates inner-shelf stratification. Regions conducive for diurnal thermally driven exchange are also subjected to waves and surf-zone processes. Transient Rip-currents (TRCs) are ubiquitous in natural surf-zones and are the dominant mechanism for exchanging tracers between the surf-zone and inner-shelf (e.g., Hally-Rosendahl et al., 2014, 2015). Recently, Kumar & Feddersen (JPO I-II & GRL, 2017) found that strong vertical mixing induced by TRCs on a stratified inner-shelf generated a baroclinic cross-shore exchange flow that significantly enhanced tracer exchange across the inner-shelf (out to approx. 800 m), relative to unstratified conditions and/or without TRCs. As the TRC exchange mechanism depended critically on stratification, it is unknown whether it persists with the addition of SHF driven stratification changes or whether the subsequent SHF driven exchange dominates. This archive consists of ROMS circulation model output from a series of simulations designed to examine the exchange induced by combined SHF+TRC forcing. A series of idealized surf-zone tracer release simulations was performed to evaluate the relative importance of SHF and TRC forcing to inner-shelf cross-shore exchange. Simulations are conducted for SHF and TRC forcing both separately and combined with different model initialization times relative to the surface heat flux cycle and different tracer release times relative to model initialization, allowing for an ensemble averaging analysis approach.

Idealized surf-zone tracer release simulations used to evaluate relative importance of SHF and TRC forcing to inner-shelf cross-shore exchange. Includes raw model output (ROMS netcdf) and processed output (Matlab binary) analyzed by Grimes et al. (2020).

• 2019 to 2020

• 2020

• Feddersen, Falk

• Kumar, Nirnimesh

• Grimes, Derek J.

Funded under the CSIDE grant by the National Science Foundation (NSF OCE-1459389), with student funding provided through the NSF-GRFP.

This work used the Extreme Science and Engineering Discovery Environment (XSEDE) Comet at SDSC through allocation TG-OCE180014, which is supported by NSF ACI-1548562.

• Coastal physical oceanography
• Coupled-Ocean-Atmosphere-Wave-Sediment Transport (COAWST) Modeling System
• Cross-shore tracer exchange
• Diurnal thermally driven exchange
• FunwaveC model
• Inner-shelf circulation
• Modeling
• Nearshore
• Regional Ocean Modeling System (ROMS)
• Simulating WAves in the Nearshore (SWAN)
• Surf-zone processes

• data
• image
• text

• English

Doi: https://doi.org/10.6075/J0WM1BSJ

Primary associated publication

• Grimes, D. J., Feddersen, F., & Kumar, N. (2020). Tracer exchange across the stratified inner‐shelf driven by transient rip‐currents and diurnal surface heat fluxes. Geophysical Research Letters, 47, e2019GL086501. https://doi.org/10.1029/2019GL086501

Other resource

• Grimes et al., 2020 publication data: https://sandbox.zenodo.org/record/507447

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2023-06-06