Showing papers on "Weather station published in 1965"

The relation between wind speed and summer isothermal surface layer of water at ocean station P in the eastern subarctic Pacific Ocean

Abstract: Bathythermographic and wind speed data collected at Ocean Weather Station P (50°N, 145°W) during April through August of the four years, 1956 through 1959, have been examined for relationships between the depth of the isothermal surface layer and the wind speed. It is shown that this depth can be related linearly to the mean wind speed averaged 12 hours in advance of the bathythermograph observation. The magnitudes of the standard error of estimate for the regression curves are almost the same as the standard deviations of the mixed-layer depths obtained from several series of more than eight bathythermograph observations made at intervals of 15 minutes, 1 hour, and 2 hours. It is concluded that the fluctuations of the mixed-layer depth, as indicated in the regression analysis and others, are due to the effects of internal waves. Improvement on the present relationship between the mixed-layer depth and wind speed would require specialized observations, in which, among others, the effects of the internal waves are smoothed out or eliminated and momentum flux from air to water monitored accurately.

Telemetry of Soil-Moisture and Weather Variables,

Abstract: : Development and installation of a soil-moisture and weather station capable of telemetering soil-moisture and weather variables demonstrated that such an installation can be used to monitor the soil and weather conditions of remote areas. A soil-moisture measuring circuit developed by WES and consisting of a specially designed a-c ohmmeter with three overlapping measuring ranges was determined to be an improvement over commercially available portable soil-moisture bridges. The circuit also did much to extend the capability of the electrical-resistance type soil-moisture sensor into the very low range of soil moisture. All currently available soil-moisture sensors operating on the electrical-resistance principle tend to be sensitive to the chemical composition of the soil and may therefore be erratic over extended periods of wetting and drying, as was also the case in this investigation. As the tests continue, nuclear moisture meters which employ neutron moderating techniques for determining moisture will be integrated into the system developed in this investigation in an attempt to more accurately define moisture conditions.