SYNOPTIC CLASSIFICATION AND PHYSICAL MODEL EXPERIMENTS TO GUIDE FIELDSTUDIES IN COMPLEX TERRAIN

Citation
Ns. Berman et al., SYNOPTIC CLASSIFICATION AND PHYSICAL MODEL EXPERIMENTS TO GUIDE FIELDSTUDIES IN COMPLEX TERRAIN, Journal of applied meteorology, 34(3), 1995, pp. 719-730
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Metereology & Atmospheric Sciences
Journal title
ISSN journal
0894-8763
Volume
34
Issue
3
Year of publication
1995
Pages
719 - 730
Database
ISI
SICI code
0894-8763(1995)34:3<719:SCAPME>2.0.ZU;2-1
Abstract
Synoptic classification is used to identify meteorological conditions characteristic of high-pollution periods at Nogales, Arizona. Low surf ace winds determined by local surface cooling at night with little ver tical mixing were found to be most important. This condition was simul ated in a 0.79-m-square box filled with water with the lower surface m ade to model a 12-km-square region of the surface topography of the Un ited States-Mexico border at Nogales. The aluminum base was cooled to induce the downslope flows. Photographs of dye initially placed on the surface at many locations were used to obtain a set of surface veloci ties that formed the input to the Diagnostic Wind Model (DWM). The DWM provided hourly velocity data with grids of 500- and 250-m spacings. The similarity arguments used to analyze the relationship of the physi cal model to the atmosphere are discussed. Although the magnitude of t he wind vectors in the physical model cannot be matched to the atmosph ere, the directions can be used to assess the accuracy of the wind fie ld obtained from a sparse set of field sites. A range of locations of these sites is analyzed to determine a strategy for obtaining sufficie nt wind data to depict satisfactory wind fields in this complex terrai n.