Showing papers on "Weather station published in 1978"

Forecasting Dew Duration at Pendleton, Oregon, Using Simple Weather Observations

Abstract: The importance of dew to agriculture, together with the absence of dew measurements at standard weather station sites, resulted in the development of predictive models for dew formation in the Umatilla River Basin, Oregon. Meteorological data were obtained at the Pendleton Experiment Station in close proximity to dew-measurement devices, and from the Pendleton National Weather Service Office. Dew measurements, made during the months of April, May and June for the years 1971–76, were compared with values of wind speed, relative humidity and minimum temperature at the Experiment Station. All three variables were found to have significantly different average values when dew occurred as opposed to when dew did not occur. The duration of relative humidity above 90% exhibited the strongest correlation with dew duration (r = 0.60). Using these boundary values beyond which the occurrence of dew was unlikely, dew occurrence was predicted with an accuracy of 81%. With the addition of a boundary value for s...

A temperature correction for Tucker's ocean rainfall estimates

Abstract: A method suggested by G. B. Tucker of estimating rainfall from present weather observations is tested on 28 coastal stations. Tucker's method was developed from a group of stations in Great Britain; at other latitudes, due to air temperature differences, the Tucker estimates may be several times too high or too low. Regression formulae are presented to adjust yearly, quarterly, and monthly mean precipitation values for air temperature. Corrected rainfall maps based upon ocean weather station data reveal a formerly undetected rainfall maximum in western mid-latitudes of the North Pacific and North Atlantic Oceans.