Search from over 60,000 research works

Advanced Search

Effects of stability functions in a dynamic model convective boundary layer simulation

[thumbnail of Open Access]
Preview
asl.1008.pdf - Published Version (1MB) | Preview
Available under license: Creative Commons Attribution
[thumbnail of dyn-stability.pdf]
dyn-stability.pdf - Accepted Version (277kB)
Restricted to Repository staff only
Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email

Bopape, M.-J., Plant, B. orcid id iconORCID: https://orcid.org/0000-0001-8808-0022, Coceal, O. orcid id iconORCID: https://orcid.org/0000-0003-0705-6755, Efstathiou, G. and Valdivieso Da Costa, M. orcid id iconORCID: https://orcid.org/0000-0002-1738-7016 (2021) Effects of stability functions in a dynamic model convective boundary layer simulation. Atmospheric Science Letters, 22 (1). e1008. ISSN 1530-261X doi: 10.1002/asl.1008

Abstract/Summary

Dynamic subgrid models are increasingly being used in simulations of the atmospheric boundary layer. We have implemented several variant forms of dynamic models in the UK Met Office Large Eddy Model (MetLEM), including a state-of-the-art Lagrangian-Averaged-Scale-Dependent (LASD) model. The implementation includes optional use of stability functions in the specification of the eddy viscosity and diffusivity, as well as optional use within the dynamic calculation of the Smagorinsky parameter. This paper reports on the behaviour of the LASD model with different choices for the inclusion and treatment of stability functions in convective boundary layer simulations at different resolutions. Results are compared against a high-resolution Large-Eddy simulation (LES) and against simulations employing the Smagorinsky-Lilly subgrid model. We conclude that the use of stability functions improves the behaviour of the LASD model in the grey zone regime. Moreover, a careful treatment of the stability functions in the calculation of the dynamic parameters, whilst attractive theoretically, is found to be unnecessary in practical terms.

Altmetric Badge

Item Type Article
URI https://reading-clone.eprints-hosting.org/id/eprint/92299
Item Type Article
Refereed Yes
Divisions Science > School of Mathematical, Physical and Computational Sciences > NCAS
Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
Uncontrolled Keywords Convective boundary layer, dynamic Smagorinsky subgrid model, scale-dependent Lagrangian dynamic scheme, grey zone
Publisher John Wiley & Sons
Download/View statistics View download statistics for this item

Downloads

Downloads per month over past year

University Staff: Request a correction | Centaur Editors: Update this record

Search Google Scholar