Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3301-3320 of 5084
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A Comparison of Sensible and Latent Heat Flux Calculations Using the Bowen Ratio and Aerodynamic Methods
(American Meteorological Society, 1989)An analysis technique is outlined that calculates the sensible and latent heat fluxes by the Bowen ratio and aerodynamic methods, using profile measurements at any number of heights. Field measurements at two sites near ... -
Determination of Rain Intensity from Doppler Spectra of Vertically Scanning Radar
(American Meteorological Society, 1989)A new method is given to determine the rain intensity from data collected by a vertically scanning Doppler radar. The method is based an relating a theoretical velocity spectrum derived from a gamma drop size distribution ... -
Airplane Instrument to Detect Ice Particles
(American Meteorological Society, 1989)A simple instrument that detects ice particles has been developed for use in airplane studies of thunderstorms. Although sophisticated instruments are available for imaging atmospheric ice particles, the spatial resolution ... -
Recovering “Lost” Data: An Adaptive, Least-Squares Outlier Detection Technique
(American Meteorological Society, 1989)On occasion, digital data gathered during field projects suffers damage due to hardware problems. If no more than half the data are damaged and if the damaged data are randomly distributed in space or time, there is a high ... -
Effect of Drop Oscillations on Spectral Moments and Differential Reflectivity Measurements
(American Meteorological Society, 1989)A perturbation method is applied to spheroidal oscillating drops to determine the effect of fundamental axisymmetric oscillations on the power spectra and polarimetric measurements. It is shown that vibration magnitudes ... -
Reducing Dew and Frost on the Dames of Net Pyrradiometers
(American Meteorological Society, 1989)The objective of this study was to improve the accuracy of net radiation (Rn) measurements under conditions conducive to dew or frost deposition. Two nonventilated net pyrradiometers were mounted over grass during November ... -
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Comments on “A Quality Control Program for Surface Mesonetwork Data”
(American Meteorological Society, 1989)tract -
A New Way of Anemometer Calibration and Its Application to a Sonic Anemometer
(American Meteorological Society, 1989)To obtain accurate results from flux measurements with the eddy-correlation method, one has to be very sure about the causes of any mean vertical wind speed. Furthermore, it is generally not sufficient to use simple ... -
The K-Gill: A Twin Propeller-Vane Anemometer for Measurements of Atmospheric Turbulence
(American Meteorological Society, 1989)A twin propeller-vane anemometer developed at the University of British Columbia was successfully used for unattended measurements of atmospheric turbulence over extended periods of time during moderate to high winds in ... -
Momentum Flux Measurements over Mountains: Problems Associated with the Symmetrical Two-Beam Radar Technique
(American Meteorological Society, 1989)An experiment to measure the vertical transport of horizontal momentum was carried out using the Poker Flat, Alaska, MST radar operating in a symmetrical two-beam mode. We show that the difficulties inherent in this ... -
Radar Receiver Calibration by Means of Multiple Processing of Weather Echoes
(American Meteorological Society, 1989)In this paper we analyze a method of real-time radar receiver calibration by means of multiple processing of the same meteorological echoes collected during the routine measurements. It is shown that the method is independent ... -
Comparison of Simulated Rain Rates from Disdrometer Data Employing Polarimetric Radar Algorithms
(American Meteorological Society, 1989)Disdrometer data collected during three spring days, with moderate to heavy rain in the Norman, Oklahoma region are used with various polarimetric radar algorithms to simulate rain rates. It is assumed that available ... -
Estimation of Divergence in the Prestorm Boundary Layer
(American Meteorological Society, 1989)An analysis technique to derive wind field parameters from single-Doppler velocity measurements, known as Modified Velocity-Volume Processing (MVVP) is examined from both theoretical and operational perspectives. For this ... -
Considerations in Estimating Horizontal Wind Gradients from an Individual Doppler Radar or a Network of Wind Profilers
(American Meteorological Society, 1989)Applications of Doppler weather radar data to the analysis of wind fields are reviewed. Radial velocity measurements from a single radar are used to estimate horizontal wind vectors within small azimuthal sectors using two ... -
A Photoelectric Technique for Measuring Lightning-Channel Propagation Velocities from a Mobile Laboratory
(American Meteorological Society, 1989)We have developed a device to measure lightning-channel propagation velocities. It consists of eight solid state silicon photodetectors mounted behind precision horizontal slits in the focal plane of a 50-mm lens on a 35-mm ... -
Pulse Compression and Sea Level Tracking in Satellite Altimetry
(American Meteorological Society, 1989)With the presently operational altimeter on the U.S. Navy satellite GEOSAT, and three new altimeters soon to be launched by the European, French and U.S. space agencies, satellite altimetry promises to become a standard ... -
Field Intercomparison of Ground-Based Cloud Physics Instruments at Whitetop Mountain, Virginia
(American Meteorological Society, 1989)In May 1987 a two-week field intercomparison study of ground-based cloud liquid water content (LWC) and cloud detector instruments was performed at the Tennessee Valley Authority research station at the summit of Whitetop ... -
The Low-Frequency Drift of Paroscientific Pressure Transducers
(American Meteorological Society, 1989)Sea Data pressure gauges were used in 1985 and 1986 in the central equatorial Pacific Ocean to record subsurface pressure. These gauges were equipped with Paroscientific Digiquartz pressure transducers which suffered ... -
Evaluation of Liquid Water Measuring Instruments in Cold Clouds Sampled during FIRE
(American Meteorological Society, 1989)Liquid water measurements from the Rosemount icing detector (RICE), Particle Measuring Systems (PMS) forward scattering spectrometer probe (FSSP), and Johnson?williams and King hot-wire probes used on the NCAR King Air ...