Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3281-3300 of 5084
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Development of Wind Profiling Sodar
(American Meteorological Society, 1989)The present study group has developed a new wind profiling sodar with a phased array antenna. This system is superior to usual ones with parabolic reflectors in its portability. Preliminary experiments have shown the ... -
A Case Study Using Kinematic Quantities Derived from a Triangle of VHF Doppler Wind Profilers
(American Meteorological Society, 1989)Horizontal divergence, relative vorticity, kinematic vertical velocity, and geostrophic and ageostrophic winds are computed from Colorado profiler network data to investigate an upslope snowstorm in northeastern Colorado. ... -
Meteorological Data Needs for Modeling Air Quality Uncertainties
(American Meteorological Society, 1989)A probabilistic framework for incorporating uncertainty in air quality models is described. The quantitative dependence of the uncertainty in calculated air quality concentrations on the uncertainty in the input meteorological ... -
Horizontal Resolution Needs for Adequate Lower Tropospheric Profiling Involved with Atmospheric Systems Forced by Horizontal Gradients in Surface Heating
(American Meteorological Society, 1989)For a propagating mesoscale system whose intensity and structure is not changing with time, relatively coarse horizontal profiler resolution is sufficient to resolve the feature since the circulation would pass by the ... -
An Examination of Wind Profiler Signal Processing Algorithms
(American Meteorological Society, 1989)A numerical model to simulate radar data is used for testing various estimators of the Doppler shift in Doppler radar echoes. The estimators are the pulse pair and poly-pulse pair algorithms in the correlation domain, a ... -
Ground-Based Microwave Radiometric Observations of Precipitable Water Vapor: A Comparison with Ground Truth from Two Radiosonde Observing Systems
(American Meteorological Society, 1989)Dual-channel microwave radiometric measurements of precipitable water vapor are compared with values determined from two types of radiosondes. The first type is used in conventional soundings taken by the National Weather ... -
Accuracy of the Collocated Transfer Standard Method for Wind Instrument Auditing
(American Meteorological Society, 1989)The application of collocated data collection for the purpose of estimating the accuracy of an operating wind instrument requires some baseline demonstrating the best agreement which can be expected. A series of data were ... -
Optical Extinction Spectroscopy at Moderate Resolution: Insights into Problems of Weak Absorption Bands
(American Meteorological Society, 1989)Sunphotometry is a common technique for characterizing aerosol properties. Photometers used for these measurements have a series of narrow-band filters that are chosen to avoid molecular absorption features, except for the ... -
A Technique for Estimating Outgoing Longwave Radiation from HIRS Radiance Observations
(American Meteorological Society, 1989)A new technique for estimating outgoing longwave radiation from observations on the NOAA operational satellites has been developed from a regression analysis of radiation model calculations. The technique consists of a ... -
An Instrument for the Simultaneous Measurement of the Image and Electric Charge of Hydrometeors
(American Meteorological Society, 1989)While past measurements of electric charges on cloud particles have led to some advances toward ascertaining the mechanisms of charge generation, it became evident that an important part of the problem is still unsolved, ... -
Doppler Sonar and Surface Waves: Range and Resolution
(American Meteorological Society, 1989)The performance limitations of an acoustic Doppler sonar system are explored and compared with anticipated requirements for the measurement of surface wave directional/frequency spectra. To obtain measurements to a range ... -
Imagery Randomized Block Analysis (IRBA) Applied to the Verification of Cloud Edge Detectors
(American Meteorological Society, 1989)A recently developed statistical method is described for evaluating the effectiveness of numerical models. This method is applied to the verification of the effectiveness of satellite imagery cloud edge detectors. Digital ... -
Efficient Differential Reflectivity Processing Using Logarithmic Receivers
(American Meteorological Society, 1989)The differential reflectivity (ZDR) measurement introduced by Seliga and Bringi has shown potential for extending cloud microphysical studies and improving rainfall rate measurement. The sensitivity of ZDR measurement ... -
Radiometric and Geometric Calibration of a Visible Spectral Electro-Optic “Fisheye” Camera Radiance Distribution System
(American Meteorological Society, 1989)Camera systems which measure a complete hemispherical field (?fisheye? lens systems), can be applied to the measurement of the radiance, but accurate radiometric and geometric calibrations are required to obtain absolute ... -
Experimental Tests of Methods for the Measurement of Rainfall Rate Using an Airborne Dual-Wavelength Radar
(American Meteorological Society, 1989)For a spaceborne meteorological radar, the use of frequencies above 10 GHz may be necessary to attain sufficient spatial resolution. As the frequency increases, however, attenuation by rain becomes significant. To extend ... -
An Open Path, Fast Response IR Spectrometer for Simultaneous Detection of C02 and Water Vapor Fluctuations
(American Meteorological Society, 1989)A fast response C02 and water vapor (H2O) analyzer was developed in this study for the measurement of atmospheric turbulence fluctuations and, in conjunction with a fast response anemometer, transport of these entities. ... -
Buoy-Calibrated Winds over the Gulf of Mexico
(American Meteorological Society, 1989)The large variability of the Gulf of Mexico wind field indicates that high-resolution wind data will be required to represent the weather systems affecting ocean circulation. This report presents methods and results of the ... -
Temporal Sampling Requirements for Surface Drifting Buoys in the Tropical Pacific
(American Meteorological Society, 1989)Drifting buoy data from the eastern tropical Pacific Ocean are used to evaluate the degradation of sea surface temperature and current information incurred by reducing the number of transmissions from drifting buoys using ... -
Coincidence and Dead-Time Corrections for Particles Counters. Part II: High Concentration Measurements with an FSSP
(American Meteorological Society, 1989)Meat of the procedures proposed in the past to correct the coincidence and dead time losses in droplet counters FSSP* or ASSP** are based on empirical formulae. A more rigorous analysis of the statistical behavior of these ... -
Coincidence and Dead-Time Corrections for Particle Counters. Part I: A General Mathematical Formalism
(American Meteorological Society, 1989)Counting loss due to coincidences limit the efficiency of the retriggerable particle counters. When the particle rate increases, the counted rate rapidly reaches a maximum so that it becomes impossible to precisely estimate ...