scholarly journals Analysis of boundary layer on an arbitrarily selected seabed in wave field.

1989 ◽  
Vol 36 ◽  
pp. 11-15
Author(s):  
KIYOSHI TAKIKAWA
Keyword(s):  
Boundary Layer ◽  
Wave Field

scholarly journals Filtering of Parameterized Nonorographic Gravity Waves in the Met Office Unified Model

2005 ◽  
Vol 62 (6) ◽  
pp. 1831-1848 ◽  
Author(s):  
Christopher D. Warner ◽  
Adam A. Scaife ◽  
Neal Butchart
Keyword(s):  
Boundary Layer ◽  
Wave Field ◽  
Gravity Wave ◽  
Gravity Waves ◽  
Grid Point ◽  
Wave Spectrum ◽  
Unified Model ◽  
Isotropic Source ◽  
Wave Forcing ◽  
Filtering Effect

Abstract This paper investigates the vertical filtering of parameterized gravity wave pseudomomentum flux in the troposphere–stratosphere version of the Met Office Unified Model. Gravity wave forcing is parameterized using the Warner and McIntyre spectral gravity wave parameterization. The same amount of isotropic pseudomomentum flux per unit mass is launched from the planetary boundary layer at each grid point. The parameterization models the azimuthally dependent Doppler shifting and breaking of the gravity wave spectrum as it is filtered by the background atmosphere. The result is an anisotropic distribution of pseudomomentum flux among azimuthal sectors that varies greatly with altitude and location. This gives an idealized global climatology of nonorographic gravity waves. The filtering effect of the atmosphere in this climatology is diagnosed using the “zonal anisotropy.” Results show areas where observational measurements could be targeted to find the most prominent features in the gravity wave field. Such areas include, for example, the summer stratosphere where zonal anisotropy is very large and where there is a significant localization in latitude and longitude of patches of high zonal anisotropy. Comparisons are also made with recent observational estimates of gravity wave fluxes and test whether wind filtering of a homogeneous, azimuthally isotropic source is enough to reproduce observed features of the gravity wave field.

Effects of continental boundary layer evolution, convection, turbulence and entrainment, on aerosol formation

Tellus B ◽  
2001 ◽  
Vol 53 (4) ◽  
pp. 441-461 ◽  
Author(s):  
E. D. NILSSON ◽  
Ü. RANNIK ◽  
M. KULMALA ◽  
G. BUZORIUS ◽  
C. D. O'DOWD
Keyword(s):  
Boundary Layer ◽  
Aerosol Formation
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