Boundary Layer, Urban Meteorology and Land-Surface Processes

Step Brothers 2: Revisiting Surface Heat-Flux and Temperature Boundary Conditions in Models of Stably Stratified Boundary-Layer Flows

Dr. Jeremy A. Gibbs
OU School of Meteorology / Advanced Radar Research Center

26 September 2014, 3:00 PM

National Weather Center, Room 5600
120 David L. Boren Blvd.
University of Oklahoma
Norman, OK

Two formulations of the surface thermal boundary condition commonly employed in numerical modelling of atmospheric stably stratified surface-layer flows are joined together through the marriage of Monin and Obukhov. The first condition is stated in terms of the surface heat flux and the second is stated in terms of the vertical potential temperature difference. Both claim superiority in representing near-surface turbulent transport under stable conditions. Their claims are evaluated using analytical considerations and observational data from the Cabauw site in the Netherlands.

Who will win? Can they coexist? Will their parents’ similarity relationship survive?

Surface heat flux: “Maybe someday we could become friends. Friends who ride majestic, translucent steeds, shooting flaming arrows across the bridge of Hemdale.

Potential Temperature: “I would follow you into the mists of Avalon if that's what you mean.

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