Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3961-3980 of 5084
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Single Doppler Radar Measurements of Turbulence Profiles in the Convective Boundary Layer
(American Meteorological Society, 1986)The velocity-azimuth-display technique provides a measurement of the mean wind components above a conically scanning Doppler radar. Wind components are often computed from a least-squares fit of a sinusoid to the Doppler ... -
The Pumping SeaSoar: A High-Resolution Seawater Sampling Platform
(American Meteorological Society, 2002)The first results obtained with the Lamont Pumping SeaSoar (LPS), a combination measurement and sampling platform towed by a research ship at speeds of 6?7 kt, are presented. The system allows not only measurement of a ... -
Measurement of Sea Surface Displacement with Interferometric Radar
(American Meteorological Society, 2002)The technique by which interferometric radar can measure the time-varying sea surface displacement is outlined, and an experiment to test the performance of this technique is described. A high-resolution X-band imaging ... -
Hilbert Transform from Wavelet Analysis to Extract the Envelope of an Atmospheric Mode: Examples
(American Meteorological Society, 2002)During the last few years a great number of papers have been devoted to a versatile tool: continuous wavelet analysis and its application. Thus, this tool has become widespread for analyzing meteorological and oceanographic ... -
A New Method for Determining Cloud Transmittance and Optical Depth Using the ARM Micropulsed Lidar
(American Meteorological Society, 2002)Cirrus clouds play an important role in the climate through their optical and microphysical properties. The problem with measuring the optical properties of these clouds can be partially addressed by using lidar systems. ... -
A Preliminary Survey of Clear-Air Echo Appearances over the Kanto Plain in Japan from July to December 1997
(American Meteorological Society, 2002)A preliminary survey of clear-air echo appearances over the Kanto plain in Japan from July to December 1997 is presented. A distinct contrast was seen between clear-air echoes observed over land and their absence over the ... -
Measuring Spectral Actinic Flux and Irradiance: Experimental Results from the Actinic Flux Determination from Measurements of Irradiance (ADMIRA) Project
(American Meteorological Society, 2002)Results are presented from the Actinic Flux Determination from Measurements of Irradiance (ADMIRA) campaign to measure spectral global UV irradiance and actinic flux at the ground, beneath an atmosphere well defined by ... -
Estimating the Most Steady Frame of Reference from Doppler Radar Data
(American Meteorological Society, 2002)A method is described to determine the most steady frame of reference of a weather system from data from one or more Doppler radars at three analysis times. The most steady frame of reference is that frame in which the ... -
The Effects of Nonuniform Beam Filling on Vertical Rainfall Velocity Measurements with a Spaceborne Doppler Radar
(American Meteorological Society, 2002)Information on the global distribution of vertical velocity of precipitating particles is needed in estimating latent heat fluxes, and therefore in the general study of energy transportation phenomena in the atmosphere. ... -
Profiling Cloud Ice Mass and Particle Characteristic Size from Doppler Radar Measurements
(American Meteorological Society, 2002)A remote sensing method is proposed for the retrievals of vertical profiles of ice cloud microphysical parameters from ground-based measurements of radar reflectivity and Doppler velocity with a vertically pointed cloud ... -
Corrections of Humidity Measurement Errors from the Vaisala RS80 Radiosonde—Application to TOGA COARE Data
(American Meteorological Society, 2002)A series of laboratory tests have been conducted on several different batches of Vaisala RS80 radiosondes to understand and develop methods to correct six humidity measurement errors, including chemical contamination, ... -
Calibration of an Airborne Lyman-Alpha Hygrometer and Measurement of Water Vapor Flux Using a Thermoelectric Hygrometer
(American Meteorological Society, 1986)An improved calibration technique for an airborne Lyman-alpha hygrometer is presented. Like previous methods, it relies upon simultaneous measurement of absolute humidity determined from a slower response hygrometer. We ... -
RASS Developments on the VHF Radar at CNRM/Toulouse Height Coverage Optimization
(American Meteorological Society, 2002)A method is presented to optimize the height coverage of virtual temperature profiles using the Radio Acoustic Sounding System (RASS) on a 45-MHz monostatic wind profiler. It has already been shown that the main limitation ... -
An Improved High-Resolution Processing Method for a Frequency Domain Interferometric Imaging (FII) Technique
(American Meteorological Society, 2002)Frequency hopping [also recently called range imaging (RIM) or frequency domain interferometric imaging (FII)] is a pulse compression technique used to improve the range resolution ?r of Doppler radars limited by their ... -
Range Errors in Wind Profiling Caused by Strong Reflectivity Gradients
(American Meteorological Society, 2002)Comparisons of data taken by collocated Doppler wind profilers using 100-, 500-, and 1000-m pulse lengths show that the velocity profiles obtained with the longer pulses are displaced in height from contemporaneous profiles ... -
An Electronically Stabilized Phased Array System for Shipborne Atmospheric Wind Profiling
(American Meteorological Society, 2002)The design, construction, and first results are presented of a 915-MHz Doppler wind profiler that may be mounted on a moving platform such as a mobile land vehicle, ocean buoy, or a ship. The long dwell times in multiple ... -
The Australian Bureau of Meteorology 1280-MHz Wind Profiler
(American Meteorological Society, 2002)The Australian Bureau of Meteorology has constructed a new 1280-MHz radar wind profiler. Key features include a state-of-the-art digital transceiver system and modern peak detection algorithms for obtaining high quality ... -
Comparison of Radar Reflectivity and Vertical Velocity Observed with a Scannable C-Band Radar and Two UHF Profilers in the Lower Troposphere
(American Meteorological Society, 2002)A C-band meteorological Doppler radar has been used to investigate the dynamic processes and the coherent organizations within a clear air atmospheric boundary layer (ABL). Depending on the atmospheric conditions, this ... -
Assimilating Radar, Surface, and Profiler Data for the Sydney 2000 Forecast Demonstration Project
(American Meteorological Society, 2002)A variational scheme for the analysis of low-level wind data is presented, and its performance during a recent field experiment is described. The analysis scheme finds an optimal fit to the data and a background field under ... -
Application of a Bayesian Wind Profile Retrieval Technique to Radar Data Collected in the Alpine Southern Upslope Region and Comparison with Upstream Wind Profiler Measurements
(American Meteorological Society, 2002)In this paper, a new operational technique to retrieve the horizontal wind profile from Doppler radar measurements is used to carry out a statistical comparison of upslope and upstream wind profiles in the southern flank ...