Preprints
https://doi.org/10.5194/gmd-2020-351
https://doi.org/10.5194/gmd-2020-351

Submitted as: model evaluation paper 09 Dec 2020

Submitted as: model evaluation paper | 09 Dec 2020

Review status: a revised version of this preprint was accepted for the journal GMD and is expected to appear here in due course.

Unstructured global to coastal wave modeling for the Energy Exascale Earth System Model using WAVEWATCHIII version 6.07

Steven R. Brus1, Phillip J. Wolfram2, Luke P. Van Roekel1, and Jessica D. Meixner3 Steven R. Brus et al.
  • 1Fluid Dynamics and Solid Mechanics, Los Alamos National Laboratory, Los Alamos, NM, USA
  • 2Advanced Engineering Analysis, Los Alamos National Laboratory, Los Alamos, NM, USA
  • 3National Centers for Environmental Prediction, Environmental Modeling Center, National Oceanic and Atmospheric Administration, College Park, MD, USA

Abstract. Wind-wave processes have generally been excluded from coupled Earth system models due to the high computational expense of spectral wave models, which resolve a frequency and direction spectrum of waves across space and time. Existing uniform-resolution wave modeling approaches used in Earth system models cannot appropriately represent wave climates from global to coastal ocean scales, largely because of tradeoffs between coastal resolution and computational costs. To resolve this challenge, we introduce a global unstructured mesh capability for the WAVEWATCHIII (WW3) model that is suitable for coupling within the U.S. Department of Energy's Energy Exascale Earth System Model (E3SM). The new unstructured WW3 global wave modeling approach can provide the accuracy of higher global resolutions in coastal areas at the relative cost of lower uniform global resolutions. This new capability enables simulation of waves at physically relevant scales as needed for coastal applications.

Steven R. Brus et al.

 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Steven R. Brus et al.

Data sets

Unstructured global to coastal wave modeling for the Energy Exascale Earth System Model - Simuation results and observed data Brus, S., Wolfram, P., and Van Roekel, L. https://doi.org/10.5281/zenodo.4088881

Unstructured global to coastal wave modeling for the Energy Exascale Earth System Model - 2 degree WaveWatchIII configuration files, Brus, S., Wolfram, P., and Van Roekel, L. https://doi.org/10.5281/zenodo.4086171

Unstructured global to coastal wave modeling for the Energy Exascale Earth System Model - 1/2 degree WaveWatchIII configuration files Brus, S., Wolfram, P., and Van Roekel, L. https://doi.org/10.5281/zenodo.4088444

Unstructured global to coastal wave modeling for the Energy Exascale Earth System Model - unstructured (2 degree to 1/2 degree) WaveWatchIII configuration files Brus, S., Wolfram, P., and Van Roekel, L. https://doi.org/10.5281/zenodo.4088520

Model code and software

Unstructured global to coastal wave modeling for the Energy Exascale Earth System Model - WaveWatchIII codebase Brus, S., Wolfram, P., and Van Roekel, L. https://doi.org/10.5281/zenodo.4088977

Steven R. Brus et al.

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Short summary
Wind generated waves are an important process in the global climate system. They mediate many interactions between the ocean, atmosphere, and sea ice. Models which describe these waves are computationally expensive and have often been excluded from coupled Earth system models. To address this, we have developed a capability for the WAVEWATCHIII model which allows model resolution to be varied globally across the coastal the open ocean. This allows for improved accuracy at reduced computing time.