Premium
Modelling stably stratified boundary‐layer flow over low hills
Author(s) -
Weng W.,
Chan L.,
Taylor P. A.,
Xu D.
Publication year - 1997
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49712354304
Subject(s) - mechanics , stratified flow , boundary layer , stratification (seeds) , drag , turbulence , inviscid flow , planetary boundary layer , buoyancy , internal wave , geology , stratified flows , meteorology , physics , seed dormancy , germination , botany , dormancy , biology
The mixed spectral finite‐difference model for neutrally stratified atmospheric boundary‐layer flow over complex terrain has been extended to include the effects of stable stratification with a simple turbulent‐kinetic‐energy and mixing‐length turbulence‐closure scheme. to allow internal gravity‐wave propagation, we have constructed a steady background flow such that wind velocity and buoyancy frequency are constants above the boundary layer with the assumption that there are momentum and heat sinks to balance the flux divergences in the governing equations. Model results are compared with inviscid theory. Special emphasis is placed on the pressure or form drag on topography.