✦ LIBER ✦

Parametrization of orographical effects in the planetary boundary layer

✍ Scribed by D. Yordanov; N. Godev

Publisher: Springer
Year: 1973
Tongue: English
Weight: 586 KB
Volume: 5
Category: Article
ISSN: 0006-8314
DOI: 10.1007/bf00155239

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✦ Synopsis

Studies of the influence of orography on the dynamics of atmospheric processes usually assume the following relation as a boundary condition at the surface of the Earth, or at the top of the planetary layer:

where u, v and w are the components of wind velocity along the x, y and z axes, respectively, and z0 = zo(x, y) is the equation of the Earth's orography. We see that w, and consequently the influence of orography on the dynamics of atmospheric processes, depend on the wind (u, v) and on the slope of the obstacle (zo/Jx, 6zo/y).

In the present work, it is shown that the above relation for w is insufficient to describe the influence of orography on the dynamics of the atmosphere. It is also shown that the relation is a particular case of the expression:

Wh

a,=lv, [(Ros) O + a2(Ro, s) &yj + wh VgI [ai RoszoX +I Ivg1 2 r 6 2 zo 62zO 62zo b (Ro, s + b (Ro, s) Vx + 2 1o, b a s (Ro,

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