Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3701-3720 of 5084
-
Application of Neural Network Principal Components to Climate Data
(American Meteorological Society, 2004)Principal component analysis (PCA) is one of the most widely used methods in the examination of climate data. However, PCA of a dataset is handicapped if the data size is large. PCA of a large dataset would require huge ... -
The Adaptive Spectral Element Method and Comparisons with More Traditional Formulations for Ocean Modeling
(American Meteorological Society, 2004)Triangular spectral elements offer high accuracy in complex geometries, but solving the related matrix problem can be cumbersome and time consuming. In restricted applications, recent developments have led to a family of ... -
Multiresolution Interpolation and Detiding of the ADCP Data
(American Meteorological Society, 2004)To account for the uneven sampling of current measurements collected by acoustic Doppler current profilers (ADCPs), a robust, three-dimensional interpolation scheme based on the multiresolution representation of the regional ... -
Short-Wave Directional Distribution for First-Order Bragg Echoes of the HF Ocean Radars
(American Meteorological Society, 2004)Directional distributions of 0.505-Hz ocean waves were investigated using 24.5-MHz HF ocean radars. Recent observations of surface waves reported that the wave directional distribution was bimodal rather than unimodal in ... -
The Harmonic Constant Datum Method: Options for Overcoming Datum Discontinuities at Mixed–Diurnal Tidal Transitions
(American Meteorological Society, 2004)The harmonic constant datum (HCD) method is a computationally efficient way of estimating tidal datums relative to mean sea level, without the need to compute long time series. However, datum discontinuities can occur ... -
A Spectral Model for Process Studies of Rotating, Density-Stratified Flows
(American Meteorological Society, 2004)A numerical model designed for three-dimensional process studies of rotating, stratified flows is described. The model is freely available, parallel, and portable across a range of computer architectures. The underlying ... -
Intercalibration of the Infrared Window and Water Vapor Channels on Operational Geostationary Environmental Satellites Using a Single Polar-Orbiting Satellite
(American Meteorological Society, 2004)The Cooperative Institute for Meteorological Satellite Studies (CIMSS) has been intercalibrating radiometers on five geostationary satellites (GOES-8, -10, Meteosat-5, -7, and GMS-5) using a single polar-orbiting or low-earth ... -
Raindrop Size Distribution Retrievals from a VHF Boundary Layer Profiler
(American Meteorological Society, 2004)The retrieval of raindrop size distributions (DSDs) in precipitation using boundary layer wind profiler operating at VHF is described. To make the retrievals, a Fourier transform?based deconvolution technique, optimized ... -
Multiwavelength Scanning Radiometer for Airborne Measurements of Scattered Radiation within Clouds
(American Meteorological Society, 1986)A multi-wavelength scanning radiometer has been developed for measuring the angular distribution of scattered radiation deep within a cloud layer. The purpose of the instrument is to provide measurements from which the ... -
Rainfall Doppler Velocity Measurements from Spaceborne Radar: Overcoming Nonuniform Beam-Filling Effects
(American Meteorological Society, 2004)For vertical Doppler velocity measurements of a homogeneous rain field, the standard spectral moment estimation techniques commonly used by ground-based and airborne Doppler rain radars can be readily extended for spaceborne ... -
Operational Aerosol Observations (AEROBS) from AVHRR/3 On Board NOAA-KLM Satellites
(American Meteorological Society, 2004)Since 1988, the National Oceanic and Atmospheric Administration (NOAA) has provided operational aerosol observations (AEROBS) from the Advanced Very High Resolution Radiometer (AVHRR/2) on board the afternoon NOAA satellites ... -
Implementation and Validation of Range Imaging on a UHF Radar Wind Profiler
(American Meteorological Society, 2003)The available range resolution of pulsed radar wind profilers is usually limited by bandwidth restrictions. Range imaging (RIM) has recently been developed as a means of mitigating these limitations by operating the wind ... -
A 35-GHz Scanning Doppler Radar for Fog Observations
(American Meteorological Society, 2003)To observe fog, a 35-GHz scanning Doppler radar was designed, assembled, and tested. The radar, mounted on a flatbed vehicle for portability, transmits peak powers of 100 kW in a pulse of 0.5-µs width and a beamwidth of ... -
Radiosonde Humidity Soundings and Microwave Radiometers during Nauru99
(American Meteorological Society, 2003)During June?July 1999, the NOAA R/V Ron H. Brown (RHB) sailed from Australia to the Republic of Nauru where the Department of Energy's Atmospheric Radiation Measurement (ARM) Program operates a long-term climate observing ... -
Identification of Marine Eddies from Altimetric Maps
(American Meteorological Society, 2003)A procedure is presented to detect eddy cores from sea level anomaly (SLA) maps obtained from altimetric measurements. The method is based on finding the sign of Q, which is an invariant of the velocity gradient tensor ... -
Sun-Pointing-Error Correction for Sea Deployment of the MICROTOPS II Handheld Sun Photometer
(American Meteorological Society, 2003)Handheld sun photometers, such as the MICROTOPS II (manufactured by Solar Light, Inc.), provide a simple and inexpensive way to measure in situ aerosol optical thickness (AOT), ozone content, and water vapor. Handheld sun ... -
Standard Deviation of the Copolar Correlation Coefficient for Simultaneous Transmission and Reception of Vertical and Horizontal Polarized Weather Radar Signals
(American Meteorological Society, 2003)The perturbation method is used to derive the variance of the zero-lag copolar correlation coefficient, ?|??HV?|?, for a radar simultaneously transmitting and receiving both horizontal and vertical polarization. The variance ... -
Local Random Errors in Tipping-Bucket Rain Gauge Measurements
(American Meteorological Society, 2003)This study presents empirical analysis of the errors in tipping-bucket rain gauges that manifest themselves as random differences between closely collocated instruments. It is based on a substantial data sample from 15 ... -
Cloud Signals from Lidar and Rotating Beam Ceilometer Compared with Pilot Ceiling
(American Meteorological Society, 1986)Cloud signals from a vertically pointing, range-corrected ruby lidar and a rotating beam ceilometer showed excellent agreement in the height at which peak signal occurred. However, pilot reports of ceiling were at significantly ... -
Surveying the Upper Ocean with the Ocean Surveyor: A New Phased Array Doppler Current Profiler
(American Meteorological Society, 2003)A new shipboard current profiler, a 75-kHz ocean surveyor, was operationally used during two research cruises in the tropical Atlantic and the subpolar North Atlantic, respectively. Here, a report is presented on the first ...