Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 2601-2620 of 5084
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Flux Attenuation due to Sensor Displacement over Sea
(American Meteorological Society, 2010)When using the eddy correlation method to measure turbulent scalar fluxes, there is often a spatial separation between the instruments measuring the scalar and the vertical velocity. The attenuation of the flux due to this ... -
Lidar Scanning of Momentum Flux in and above the Atmospheric Surface Layer
(American Meteorological Society, 2010)Methods to measure the vertical flux of horizontal momentum using both continuous wave and pulsed Doppler lidar profilers are evaluated. The lidar measurements are compared to momentum flux observations performed with sonic ... -
An Improved Method for Estimating the Wind Power Density Distribution Function
(American Meteorological Society, 2010)The wind power density (WPD) distribution curve is essential for wind power assessment and wind turbine engineering. The usual practice of estimating this curve from wind speed data is to first estimate the wind speed ... -
Simultaneous Observations of Thin Humidity Gradients in the Lower Troposphere with a Raman Lidar and the Very High-Frequency Middle- and Upper-Atmosphere Radar
(American Meteorological Society, 2010)Humidity is, among other things, a key parameter in the evolution of atmospheric dynamics and in the formation of clouds and precipitation through latent heat release. The continuous observation of its vertical distribution ... -
Differentiating between Clouds and Heavy Aerosols in Sun-Glint Regions
(American Meteorological Society, 2010)An approach is presented to distinguish between clouds and heavy aerosols in sun-glint regions with automated cloud classification algorithms developed for the National Polar-orbiting Operational Environmental Satellite ... -
A Synergy Approach to Estimate Properties of Raindrop Size Distributions Using a Doppler Lidar and Cloud Radar
(American Meteorological Society, 2010)Remote sensing systems like radars and lidars are frequently used in atmospheric measurement campaigns. Because of their different wavelengths, they operate in different scattering regimes. Combined use may result in new ... -
Operational Monitoring of Radar Differential Reflectivity Using the Sun
(American Meteorological Society, 2010)A method for the daily monitoring of the differential reflectivity bias for polarimetric weather radars is presented. Sun signals detected in polar volume data produced during operational scanning of the radar are used. ... -
The University of South Alabama Mesonet and Coastal Observing System: A Technical and Statistical Overview
(American Meteorological Society, 2010)The University of South Alabama Mesonet consists of 26 sites across the north-central Gulf of Mexico coast. Although the original purpose of the mesonet was monitoring landfalling tropical systems, meteorological data are ... -
The Hotplate Precipitation Gauge
(American Meteorological Society, 2010)A new instrument designed to measure precipitation, the ?hotplate precipitation gauge,? is described. The instrument consists of a heated thin disk that provides a reliable, low-maintenance method to measure precipitation ... -
Analysis of Z–R Relations Based on LDR Signatures within the Melting Layer
(American Meteorological Society, 2010)The inclusion of polarimetric measurements for the quantitative precipitation estimation (QPE) by weather radars as well as space- and airborne radars is considered most promising now-a-days. Because the melting layer ... -
Turbulence Patch Identification in Potential Density or Temperature Profiles
(American Meteorological Society, 2010)The Thorpe analysis is a recognized method used to identify and characterize turbulent regions within stably stratified fluids. By comparing an observed profile of potential temperature or potential density to a reference ... -
Attenuation Correction and Hydrometeor Classification of High-Resolution, X-band, Dual-Polarized Mobile Radar Measurements in Severe Convective Storms
(American Meteorological Society, 2010)X-band and shorter radar wavelengths are preferable for mobile radar systems because a narrow beam can be realized with a moderately sized antenna. However, attenuation by precipitation becomes progressively more severe ... -
The Added Value of Surface Data to Radar-Derived Rainfall-Rate Estimation Using an Artificial Neural Network
(American Meteorological Society, 2010)Radar measurements are useful for determining rainfall rates because of their ability to cover large areas. Unfortunately, estimating rainfall rates from radar reflectivity data alone is prone to errors resulting from ... -
Alternating Dual-Pulse, Dual-Frequency Techniques for Range and Velocity Ambiguity Mitigation on Weather Radars
(American Meteorological Society, 2010)This paper introduces a family of alternating dual-pulse, dual-frequency (ADPDF) techniques. These are based on frequency diversity and are proposed as a means to mitigate range and velocity ambiguities on Doppler weather ... -
CPOL Radar-Derived Drop Size Distribution Statistics of Stratiform and Convective Rain for Two Regimes in Darwin, Australia
(American Meteorological Society, 2010)This note builds on prior technique development related to the classification of rain types utilizing C-band polarimetric (CPOL) radar measurements. While the prior work was preliminary and limited in scope, the authors ... -
A Multisodar Approach to Wind Profiling
(American Meteorological Society, 2010)This paper presents the development of a multisodar mode from a five-beam sodar whereby a wind speed vector is found for sets of three acoustic beams. If the vertical beam is used, this mode enables the profiling of four ... -
The Use of Euclidean Geometric Distance on RGB Color Space for the Classification of Sky and Cloud Patterns
(American Meteorological Society, 2010)The current work describes the use of multidimensional Euclidean geometric distance (EGD) and Bayesian methods to characterize and classify the sky and cloud patterns present in image pixels. From specific images and using ... -
Automated Retrievals of Precipitation Parameters Using Non-Rayleigh Scattering at 95 GHz
(American Meteorological Society, 2010)Automated retrievals of vertical air motion and the drop size distribution (DSD) slope parameter from the surface to the base of the melting layer are presented using a technique for W-band (95 GHz) profiling radars. The ... -
Bias in Differential Reflectivity due to Cross Coupling through the Radiation Patterns of Polarimetric Weather Radars
(American Meteorological Society, 2010)Examined is bias in differential reflectivity and its effect on estimates of rain rate due to coupling of the vertically and horizontally polarized fields through the radiation patterns. To that end, a brief review of the ... -
Modeling, Error Analysis, and Evaluation of Dual-Polarization Variables Obtained from Simultaneous Horizontal and Vertical Polarization Transmit Radar. Part II: Experimental Data
(American Meteorological Society, 2010)In this second article in a two-part work, the biases of weather radar polarimetric variables from simultaneous horizontally and vertically transmit (SHV) data are investigated. The biases are caused by cross coupling of ...