Response of the Atmospheric Boundary Layer to Submesoscale Sea Surface Temperature Fronts
Submesoscale sea surface temperature fronts are ubiquitous throughout much of the global ocean; however, the response of the marine atmospheric boundary layer (MABL) to the ocean submesoscale is not well understood. Here large-eddy simulation is used to explore the time-dependent response of the MABL to idealized submesoscale sea surface temperature fronts, with an emphasis on how the dynamics of the MABL determine the strength and position of gradients in wind speed and air temperature. Results suggest that horizontal mixing only becomes important in response to frontogenesis by horizontally convergent ageostrophic flows, contrary to the common assumption that the MABL response will be strongly dependent on horizontal turbulent mixing. The fronts that develop in the MABL are also associated with large vertical relative vorticity, suggesting the possibility that submesoscale fronts may induce inertial instability in the MABL. Finally, these results provide guidance for high-resolution ocean and atmosphere modeling and for interpreting observations.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Stanford Univ., CA (United States)
- Sponsoring Organization:
- National Science Foundation (NSF) (United States); USDOE
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1489474
- Report Number(s):
- LLNL-JRNL-760790; 948978
- Journal Information:
- Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 24 Vol. 45; ISSN 0094-8276
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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