Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 2701-2720 of 5084
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Impacts of Beam Broadening and Earth Curvature on Storm-Scale 3D Variational Data Assimilation of Radial Velocity with Two Doppler Radars
(American Meteorological Society, 2009)The radar ray path and beam broadening equations are important for assimilation of radar data into numerical weather prediction (NWP) models. They can be used to determine the physical location of each radar measurement ... -
An Inexpensive Method for Measurements of Static Pressure Fluctuations
(American Meteorological Society, 2009)An application of a commercially available and inexpensive pressure probe and transducer, originally designed for pressure drop measurements in air conditioning conduits, is suggested for accurate and reliable measurements ... -
Two-Dimensional Continuous Wavelet Analysis and Its Application to Meteorological Data
(American Meteorological Society, 2009)The two-dimensional continuous wavelet transform (2D CWT) has become an important tool to examine and diagnose nonstationary datasets on the plane. Compared with traditional spectral analysis methods, the 2D CWT provides ... -
Tropospheric Water Vapor Profiles Retrieved from Pressure-Broadened Emission Spectra at 22 GHz
(American Meteorological Society, 2010)The authors present the analysis and the evaluation of the retrieval of tropospheric water vapor profiles from pressure-broadened emission spectra at 22 GHz measured with a ground-based microwave spectroradiometer. The ... -
Nadir Correction of AIRS Radiances
(American Meteorological Society, 2010)A statistical method to correct for the limb effect in off-nadir Atmospheric Infrared Sounder (AIRS) channel radiances is described, using the channel radiance itself and principal components (PCs) of the other channel ... -
Feasibility of Cloud Screening Using Proxy Photon Pathlength Distributions Derived from High-Resolution Spectra in the Near Infrared
(American Meteorological Society, 2010)High-resolution spectra of reflected sunlight in the 2-?m absorption band of CO2 are simulated at the top of the atmosphere using cloud profiles and particle sizes from CloudSat analyzed meteorology from ECMWF, surface ... -
Algorithm for Estimation of the Specific Differential Phase
(American Meteorological Society, 2009)The specific differential phase Kdp is one of the important parameters measured by dual-polarization radar that is being considered for the upgrade of the current Next Generation Weather Radar (NEXRAD) system. Estimation ... -
Rain Attenuation of Radar Echoes Considering Finite-Range Resolution and Using Drop Size Distributions
(American Meteorological Society, 2010)The classical rain attenuation correction scheme of Hitschfeld and Bordan (HIBO) and the newer iterative approach by Hildebrand (HL) are reconsidered. Although the motivation for the HL algorithm was an extension into ... -
Calibration of a Multichannel Water Vapor Raman Lidar through Noncollocated Operational Soundings: Optimization and Characterization of Accuracy and Variability
(American Meteorological Society, 2010)This paper presents a parametric automatic procedure to calibrate the multichannel Rayleigh?Mie?Raman lidar at the Institute for Atmospheric Science and Climate of the Italian National Research Council (ISAC-CNR) in Tor ... -
Water Vapor Measurements by Howard University Raman Lidar during the WAVES 2006 Campaign
(American Meteorological Society, 2010)Water vapor mixing ratio retrieval using the Howard University Raman lidar is presented with emphasis on three aspects: (i) comparison of the lidar with collocated radiosondes and Raman lidar, (ii) investigation of the ... -
Detection of Cloud-Base Height Using Jenoptik CHM15K and Vaisala CL31 Ceilometers
(American Meteorological Society, 2010)Twelve case studies of multilayer cloud-base height (CBH) retrievals from two collocated ceilometers (Vaisala CL31 and Jenoptik CHM15K) have been analyzed. The studies were performed during the period from September to ... -
PARSIVEL Snow Observations: A Critical Assessment
(American Meteorological Society, 2010)The performance of the laser-optical Particle Size Velocity (PARSIVEL) disdrometer is evaluated to determine the characteristics of falling snow. PARSIVEL?s measuring principle is reexamined to detect its limitations and ... -
Stability of the MSU-Derived Atmospheric Temperature Trend
(American Meteorological Society, 2010)Warm target effect and diurnal drift errors are the main sources of uncertainties in the trend determination from the NOAA Microwave Sounding Unit (MSU) observations. Currently, there are two methods to correct the warm ... -
Cloud Determination of All-Sky Images under Low-Visibility Conditions
(American Meteorological Society, 2009)The threshold method is commonly used to determine cloud in a sky image. This paper evaluates the method by numerical simulation and shows that the aerosol optical depth (AOD) is a key factor that influences the accuracy. ... -
Evaluating Polarimetric X-Band Radar Rainfall Estimators during HMT
(American Meteorological Society, 2010)Different relations between rainfall rate R and polarimetric X-band radar measurables were evaluated using the radar, disdrometer, and rain gauge measurements conducted during the 4-month-long field experiment. The specific ... -
In Situ Calibration of Hot-Film Probes Using a Collocated Sonic Anemometer: Implementation of a Neural Network
(American Meteorological Society, 2010)Although the integral quantities of atmospheric turbulence are conveniently measured using sonic anemometers, obtaining relevant finescale variables such as the kinetic energy dissipation using conventional hot-film/wire ... -
Comparison of Aura MLS Water Vapor Measurements with GFS and NAM Analyses in the Upper Troposphere–Lower Stratosphere
(American Meteorological Society, 2010)Water vapor mixing ratios in the upper troposphere and lower stratosphere measured by the Aura Microwave Limb Sounder (MLS) version 2.2 instrument have been compared with Global Forecast System (GFS) analyses at five levels ... -
An Isofactorial Change-of-Scale Model for the Wind Speed Probability Density Function
(American Meteorological Society, 2010)The wind speed probability density function (PDF) is used in a variety of applications in meteorology, oceanography, and climatology usually as a dataset comparison tool of a function of a quantity such as momentum flux ... -
The Airborne Demonstrator for the Direct-Detection Doppler Wind Lidar ALADIN on ADM-Aeolus. Part II: Simulations and Rayleigh Receiver Radiometric Performance
(American Meteorological Society, 2009)In the frame of the Atmospheric Dynamics Mission Aeolus (ADM-Aeolus) satellite mission by the European Space Agency (ESA), a prototype of a direct-detection Doppler wind lidar was developed to measure wind from ground and ... -
Observation of Interference Patterns in Reconstructed Digital Holograms of Atmospheric Ice Crystals
(American Meteorological Society, 2009)The observation of interference patterns in reconstructed digital holograms of natural ice crystals is reported. It is suggested that an investigation of the interference fringes? origin will yield a new application of ...