Open AccessDetection of low‐frequency organized structures in night‐time air flow within a spruce canopy on the upwind and downwind sides of a mountain ridge
Author(s) -
Potužníková K.,
Sedlák P.,
Koucká Knížová P.
Publication year - 2015
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl.578
Subject(s) - ridge , geology , canopy , hydrology (agriculture) , physical geography , geography , archaeology , paleontology , geotechnical engineering
In this paper, a wavelet‐based methodology is proposed to study the main features of turbulence data collected within the crown layer of an even‐aged Norway spruce forest at the Bílý Kříž site. The site is situated on a steep (25%) south‐southwest‐facing slope near the top of a mountain ridge. The periods of organized structures detected when the site is on the downwind (leeward) side of the ridge are significantly shorter than those detected when the site is on the upwind side of the ridge. However, the ‘leeward’ structures have a relatively higher persistence and frequency of occurrence in the 30‐min time series.