Article

 

Exploring the Possible Role of Small-Scale Terrain Drag on Stable Boundary Layers over Land Public Deposited

Contenu téléchargeable

Télécharger le fichier PDF
https://ir.library.oregonstate.edu/concern/articles/w3763833c

Descriptions

Attribute NameValues
Creator
Abstract
  • This paper addresses the possible role of unresolved terrain drag, relative to the turbulent drag on the development of the stable atmospheric boundary layer over land. Adding a first-order estimate for terrain drag to the turbulent drag appears to provide drag that is similar to the enhanced turbulent drag obtained with the so-called long-tail mixing functions. These functions are currently used in many operational models for weather and climate, although they lack a clear physical basis. Consequently, a simple and practical quasi-empirical parameterization of terrain drag divergence for use in large-scale models is proposed and is tested in a column mode. As an outcome, the cross-isobaric mass flow (a measure for cyclone filling) with the new scheme, using realistic turbulent drag, appears to be equal to what is found with the unphysical long-tail scheme. At the same time, the new scheme produces a much more realistic less-deep boundary layer than is obtained by using the long-tail mixing function.
  • Keywords: Land surface, Small scale processes, Boundary layer
  • Keywords: Land surface, Small scale processes, Boundary layer
Resource Type
DOI
Date Available
Date Issued
Citation
  • Steeneveld, G. J., A. A. M. Holtslag, C. J. Nappo, B. J. H. van de Wiel, L. Mahrt, 2008: Exploring the Possible Role of Small-Scale Terrain Drag on Stable Boundary Layers over Land. Journal of Applied Meteorology and Climatology, 47, 2518–2530.
Journal Title
Journal Volume
  • 47
Journal Issue/Number
  • 10
Déclaration de droits
Publisher
Language
Replaces

Des relations

Parents:

This work has no parents.

Articles