Interacting multi-scale wind systems within an Alpine basin, Lake Tekapo, New Zealand

McGowan, H. A. and Sturman, A. P. (1996) Interacting multi-scale wind systems within an Alpine basin, Lake Tekapo, New Zealand. Meteorology and Atmospheric Physics, 58 1-4: 165-177. doi:10.1007/BF01027563


Author McGowan, H. A.
Sturman, A. P.
Title Interacting multi-scale wind systems within an Alpine basin, Lake Tekapo, New Zealand
Journal name Meteorology and Atmospheric Physics   Check publisher's open access policy
ISSN 0177-7971
1436-5065
Publication date 1996-03-01
Sub-type Article (original research)
DOI 10.1007/BF01027563
Volume 58
Issue 1-4
Start page 165
End page 177
Total pages 13
Place of publication Wien
Publisher Springer
Language eng
Subject 040107 Meteorology
Abstract The wind regime of the Lake Tekapo Basin is examined with reference to the interaction of multi-scale local, regional and synoptic circulations. Analysis of the historical wind direction record from Mt John identifies airflow from three principal directions to most frequently affect the study area. Both seasonal and diurnal trends in the frequency of each directional category are identified, which reflect the influence of local thermal forcings and seasonal changes in synoptic circulation on the Lake Tekapo windfield. Meteorological observations from a network of automatic weather stations and anemographs within the study area identified Lake Tekapo to generate its own circulation system, a lake/land breeze. This combines with the larger scale valley wind, which during ideal conditions continues after sunset in the upper reaches of the lake catchment. During light to moderate foehn northwesterly conditions, the combined lake breeze/valley wind system remains decoupled from the prevailing synoptic airstream. Towards evening when local thermal circulations weakened, a channelised foehn airstream often becomes dominant over the entire field area. Observations made during this investigation have a number of applied implications with respect to air pollution dispersion modelling and forecasting within alpine lake basins.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Geography, Planning and Environmental Management Publications
 
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Created: Thu, 22 Jul 2010, 19:32:12 EST by Laura McTaggart