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The Diurnal Pressure Wave in Western Canada

Richmond W. LongleyDepartment of Geography, University of Alberta, Edmonton, Canada

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Abstract

Analyses of mean hourly pressure data for stations in Alberta and British Columbia for January and July show marked diurnal variations. The 12-hr wave is found to fit into the pattern discovered by other scientists. The 24-hr wave is well-marked and shows variations that result from orography and topography, and from the contrast between land and ocean. Observations from two stations above 2 km show differences which would appear to arise because of their different locations relative to the area of mountain ridges.

Abstract

Analyses of mean hourly pressure data for stations in Alberta and British Columbia for January and July show marked diurnal variations. The 12-hr wave is found to fit into the pattern discovered by other scientists. The 24-hr wave is well-marked and shows variations that result from orography and topography, and from the contrast between land and ocean. Observations from two stations above 2 km show differences which would appear to arise because of their different locations relative to the area of mountain ridges.

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