The Turbulent Pressure Spectrum Within the Roughness Sublayer of a
Subarctic Forest Canopy
Abstract
The turbulent static pressure spectrum Epp(kx) as a function of
longitudinal wavenumber kx in the roughness sublayer of forested
canopies is of interest to a plethora of problems such as pressure
pumping from snow or forest floor. Long term static pressure
measurements above a sub-arctic forested canopy during the winter and
spring were collected and analyzed for three snow cover conditions:
trees and ground covered with snow, trees are snow free but the ground
is covered with snow, and snow free cover. In all three cases, it is
shown that Epp(kx) obeys the attached eddy hypothesis at low wavenumbers
(1/δ