Observations of anti-winds in a deep alpine valley, Lake Tekapo, New Zealand

McGowan, Hamish A. (2004) Observations of anti-winds in a deep alpine valley, Lake Tekapo, New Zealand. Arctic, Antarctic and Alpine Research, 36 4: 495-501. doi:10.1657/1523-0430(2004)036[0495:OOAIAD]2.0.CO;2

Author McGowan, Hamish A.
Title Observations of anti-winds in a deep alpine valley, Lake Tekapo, New Zealand
Journal name Arctic, Antarctic and Alpine Research   Check publisher's open access policy
ISSN 1523-0430
Publication date 2004-01-01
Sub-type Article (original research)
DOI 10.1657/1523-0430(2004)036[0495:OOAIAD]2.0.CO;2
Volume 36
Issue 4
Start page 495
End page 501
Total pages 7
Editor Larry Bowlds
Place of publication Boulder
Publisher Institute of Arctic and Alpine Research, University of Colorado at Boulder
Language eng
Subject C1
260601 Meteorology
779901 Air quality
Abstract This paper presents observations of summertime anti-winds monitored under ideal conditions in the Lake Tekapo hydro-catchment situated in the central Southern Alps, New Zealand. Onset and cessation of anti-winds was observed to coincide with the change in phase of the surface limbs of thermally generated valley and mountain winds under settled anti-cyclonic conditions. Anti-winds were best developed in the early morning before surface heating and associated convective mixing of the valley atmosphere began to mask the boundaries between the surface based limb of the mountain-valley wind and the corresponding anti-wind. By mid-day, the anti-valley wind exceeded the height of the surrounding ridgeline and became embedded in the topographically channeled gradient wind. Observations presented here have both theoretical and applied implications with regard to the development of thermally generated wind systems in deep alpine valleys, and their role in the dispersion of air pollution.
Keyword Environmental Sciences
Geography, Physical
Q-Index Code C1

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Created: Tue, 14 Aug 2007, 01:04:03 EST