Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3741-3760 of 5084
-
The Influence of Support Rods on the Rotation Speed of Savonius Rotors
(American Meteorological Society, 1986)When a Savonius rotor is used on a current meter as a sensor for fluid speed, it is usually surrounded by a number of support rods. These rods interfere with the flow to the rotor and, depending on their orientation to the ... -
Offshore Wind Turbine Wakes Measured by Sodar
(American Meteorological Society, 2003)A ship-mounted sodar was used to measure wind turbine wakes in an offshore wind farm in Denmark. The wake magnitude and vertical extent were determined by measuring the wind speed profile behind an operating turbine, then ... -
The Measurement of Aerosol Optical Properties Using Continuous Wave Cavity Ring-Down Techniques
(American Meteorological Society, 2003)Large uncertainties in the effects that aerosols have on climate require improved in situ measurements of extinction coefficient and single-scattering albedo. This paper describes the use of continuous wave cavity ring-down ... -
Analysis and Correction of Dual PRF Velocity Data
(American Meteorological Society, 2003)The dual pulse repetition frequency (dual PRF) technique for extension of the unambiguous velocity interval is available on many operational Doppler weather radars. Radial velocity data obtained from a C-band Doppler radar ... -
Correction of Dual PRF Velocity Errors for Operational Doppler Weather Radars
(American Meteorological Society, 2003)Dual pulse repetition frequency (PRF) is a commonly used technique, in operational Doppler weather radar networks, that extends the unambiguous Doppler velocity. The technique requires the measurement of the radial velocity ... -
GPS Zenith Total Delay Estimation in the Mediterranean Area for Climatological and Meteorological Applications
(American Meteorological Society, 2003)A ground network of global positioning system (GPS) receivers is a powerful source of continuous integrated precipitable water vapor (IPWV) data that can be suitable for weather prediction and climate studies. The technical ... -
A High-Accuracy Multiwavelength Radiometer for In Situ Measurements in the Thermal Infrared. Part II: Behavior in Field Experiments
(American Meteorological Society, 2003)The performances of the new conveyable low-noise infrared radiometer for measurements of atmosphere and ground surface targets, or CLIMAT, are presented for in situ measurements. For this, quantitative analyses were carried ... -
A Compact, Low-Cost GPS Drifter for Use in the Oceanic Nearshore Zone, Lakes, and Estuaries
(American Meteorological Society, 2003)The design of small, compact, low-cost GPS drifters that utilize ?off the shelf? components is described. The drifters are intended for use in confined or nearshore environments over time scales of up to several days and ... -
QuikSCAT Satellite Comparisons with Nearshore Buoy Wind Data off the U.S. West Coast
(American Meteorological Society, 2003)To determine the accuracy of nearshore winds from the QuikSCAT satellite, winds from three satellite datasets (scientifically processed swath, gridded near-real-time, and gridded science datasets) were compared to those ... -
A Fast Ocean GCM without Flux Adjustments
(American Meteorological Society, 2003)The Fast Met Office/U.K. Universities Simulator project (FAMOUS) aims to develop a fast GCM, possibly 10 times faster than the Third Hadley Centre Coupled Ocean?Atmosphere GCM (HadCM3). Such a model would allow long-term ... -
EOF Calculations and Data Filling from Incomplete Oceanographic Datasets
(American Meteorological Society, 2003)The paper presents a new self-consistent method to infer missing data from oceanographic data series and to extract the relevant empirical orthogonal functions. As a by-product, the new method allows for the detection of ... -
A Vindication of the Twomey-Type Cloud Condensation Nucleus Counter
(American Meteorological Society, 1986)The performance of the Twomey-type cloud condensation nucleus (CCN) counter is evaluated by a numerical simulation and found to be better than that predicted in an earlier study. Due to a lack of data on CCN spectra at low ... -
Reducing Cross-Track Geoid Gradient Errors around TOPEX/Poseidon and Jason-1 Nominal Tracks: Application to Calculation of Sea Level Anomalies
(American Meteorological Society, 2003)A new technique is developed and tested to correct for cross-track geoid gradients in altimeter data. The proposed method is based on direct estimations of geoid variations around nominal tracks and on knowledge of ocean ... -
Retrieval of Ocean and Lake Surface Temperatures from Hyperspectral Radiance Observations
(American Meteorological Society, 2003)This paper advances hyperspectral infrared (IR) radiative transfer techniques for retrieving water (ocean and lake) surface skin temperature from clear-sky radiance observations obtained within the longwave atmospheric ... -
Efficient Algorithms for Maximum Covariance Analysis of Datasets with Many Variables and Fewer Realizations: A Revisit
(American Meteorological Society, 2003)Fast and reliable algorithms for maximum covariance analysis (MCA) are investigated. The traditional algorithm based on the direct singular value decomposition (SVD) of a covariance matrix is computationally expensive for ... -
Terrestrial Photogrammetry of Weather Images Acquired in Uncontrolled Circumstances
(American Meteorological Society, 2003)This paper describes an accurate automated technique of terrestrial photogrammetry that is applied to weather images obtained in uncontrolled circumstances such as unknown focal length and 3D camera orientation (azimuth ... -
Whitening of Signals in Range to Improve Estimates of Polarimetric Variables
(American Meteorological Society, 2003)A method to reduce errors in estimates of polarimetric variables beyond those achievable with standard estimators is suggested. It consists of oversampling echo signals in range, applying linear transformations to decorrelate ... -
Single-Doppler Velocity Retrieval with Rapid-Scan Radar Data
(American Meteorological Society, 2003)An approximate (rapid scan) dynamical model for single-Doppler retrieval of the vector wind field is investigated. This approximate model is based on the Lagrangian form of the radial component of the equation of motion ... -
Application of an Artificial Neural Network Simulation for Top-of-Atmosphere Radiative Flux Estimation from CERES
(American Meteorological Society, 2003)The Clouds and the Earth's Radiant Energy System (CERES) provides top-of-atmosphere (TOA) radiative flux estimates from shortwave (SW) and longwave (LW) radiance measurements by applying empirical angular distribution ... -
A Three-Step Dealiasing Method for Doppler Velocity Data Quality Control
(American Meteorological Society, 2003)A three-step method is developed for Doppler radar velocity dealiasing. First, the modified velocity azimuth display (VAD) method of Tabary et al. is adopted and applied to raw (aliased) velocity data to estimate horizontal ...