anemometer/thermometer Articles

  • Some thoughts on in-situ flux measurement in the atmospheric surface layer

    Due to its complexity, the state of a turbulent atmosphere can only be described using statistical quantities such as means, variances, and covariances. Computation of these statistical quantities, particularly those of higher order, must be done with considerable care. This is particularly true if the statistics are used to depict heat and momentum fluxes. This note contains considerations that ...

  • Another look at sonic thermometry

    Abstract. In this note we reassess the role of sonic thermometry in boundary-layer studies. The sonic temperature signal, when corrected for crosswind velocity contamination, very closely approximates the virtual temperature of air. This variable is needed for many boundary-layer calculations. We describe preliminary tests with a new sonic anemometer-thermometer that performs the velocity ...

  • Sonic thermometry today

    Sonic anemometer-thermometers began appearing in field studies over 50 years ago. They have since been used extensively in field experiments by atmospheric scientists in their studies of turbulent flow in the surface layer—the first 100 feet or so above the ground. The sonic approach promised better high-frequency response and far less flow distortion than what past sensors could offer. The ...

  • Basic tests for checking validity of field data

    The following guidelines are suggested for verifying micrometeorological data gathered in field experiments. It is assumed, for simplicity, that the observations being tested are made over open, relatively flat and uniform terrain, with small roughness elements. It is also assumed that the sensors and the data acquisition and recording hardware are basically sound and that the purpose of the ...

  • A simple methodology for surface layer characterization during diabatic extremes

    Abstract Increased global environmental awareness has fostered widespread use of remote automated weather station (RAWS) networks to monitor meteorological conditions, and reliance on atmospheric dispersion modeling for decisions concerning pollutant dispersion. Dispersion models require as input a characterization of surface layer (SL) heat and momentum fluxes and turbulence. ...

  • Experimental study of turbulence and vertical temperature profile in the urban boundary layer

    We observed the turbulence and vertical profile of temperature in and above the roughness sublayer (RS) using a tower, a tethered balloon and a Doppler sodar in Himeji City. A 3–D ultrasonic anemometer–thermometer was sited at a height of 54 m on the tower. The present results showed that in the RS, the ratio of friction velocity to wind speed, u* /u, observed under unstable ...


    By Inderscience Publishers

  • Multifunctional environmental meter for 5 measuring parameters – sound, light, wind temperature and humidity

    Environmental factors influence humans, animals and plants as well as buildings and their surroundings. The condition of stored goods, production processes, machines, apparatuses and buildings need to be protected. It is important to maintain a room climate that meets the needs of the users but at the same time does not cause any climate-related damage to the building. PCE Instruments has added ...


    By PCE Instruments

  • NWS Weather Spotter Relies on RainWise - Case Study

    Tom Haraden is a retired National Park Service Ranger and current National Weather Service spotter in Utah. "I like that [my MK-lll-LR] is reliable, wireless, accurate, measures maximums and minimums," Tom says, " and measures eight parameters. I guess my favorite part is having an accurate barometer. I can predict the weather here with only that. We have the display hung where the kitchen, ...


    By RainWise Inc.

  • Building Ventilation – The Proper Air Changes Per Hour (ACH)

    Posted by atlanticei If you need ventilation consulting or testing discussed in this article, call us at 1-800-344-4414 or e-mail us at info@atlenv.com for details and a free estimate. Written By:  Robert E. Sheriff, MS, CIH, CSP, ...

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