Synoptic Effects on the Local Winds in Todos Santos Bay: A Case Study

Autor:	Gerard Vogel, Edgar G. Pavia, Alejandro Parés, Sergio Reyes
Rok vydání:	1983
Předmět:	Atmospheric Science Physical phenomena Climatology Surface winds Mode (statistics) Environmental science Empirical orthogonal functions Atmospheric sciences Surface pressure Bay Physics::Atmospheric and Oceanic Physics
Zdroj:	Monthly Weather Review. 111:1494-1500
ISSN:	1520-0493 0027-0644
DOI:	10.1175/1520-0493(1983)111<1494:seotlw>2.0.co;2
Popis:	Synoptic winds, obtained from surface pressure maps, and local surface winds, registered around Todos Santos Bay, are analyzed and filtered to isolate the high-frequency band (diurnal scale) and the low-frequency band (greater than a few days) to study, independently, their physical phenomena. Two methods of analysis are used: rotary spectra and empirical orthogonal functions (EOF). The surface data show the highest energy at diurnal frequency, indicating a strong sea-land breeze regime. On the other hand, the synoptic data show the highest energy at longer periods. In general, the low-frequency synoptic wind is much stronger than the low-frequency local surface wind. The differences are explained by means of the frictional effect and the higher energy dissipation over land than over sea. The EOF fire mode of the low-frequency wind data, representing 77% of the total variance, shows the characteristics of the most energetic phenomena, i.e., the synoptic regime. The correlation between synoptic an...
Databáze:	OpenAIRE
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