Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 2761-2780 of 5084
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Use of a Vertical Vorticity Equation in Variational Dual-Doppler Wind Analysis
(American Meteorological Society, 2009)The utility of the anelastic vertical vorticity equation in a weak-constraint (least squares error) variational dual-Doppler wind analysis procedure is explored. The analysis winds are obtained by minimizing a cost function ... -
On the Quantitative Low-Level Aerosol Measurements Using Ceilometer-Type Lidar
(American Meteorological Society, 2009)The objective of this work is to investigate whether a commercial ceilometer-type lidar can be used as a quantitative aerosol measurement instrument. To this end, lidar backscattering measurements are compared with exact ... -
High-Spectral- and High-Temporal-Resolution Infrared Measurements from Geostationary Orbit
(American Meteorological Society, 2009)The first of the next-generation series of the Geostationary Operational Environmental Satellite (GOES-R) is scheduled for launch in 2015. The new series of GOES will not have an infrared (IR) sounder dedicated to acquiring ... -
Demonstration of Aerosol Property Profiling by Multiwavelength Lidar under Varying Relative Humidity Conditions
(American Meteorological Society, 2009)The feasibility of using a multiwavelength Mie?Raman lidar based on a tripled Nd:YAG laser for profiling aerosol physical parameters in the planetary boundary layer (PBL) under varying conditions of relative humidity (RH) ... -
Polar Stratospheric Cloud Observations in the 2006/07 Arctic Winter by Using an Improved Micropulse Lidar
(American Meteorological Society, 2009)The potential of a new improved version of micropulse lidar (MPL-4) on polar stratospheric cloud (PSC) detection is evaluated in the Arctic over Ny-Ålesund (79°N, 12°E), Norway. The campaign took place from January to ... -
Multiparameter Raman Lidar Measurements for the Characterization of a Dry Stratospheric Intrusion Event
(American Meteorological Society, 2009)The University of Basilicata Raman lidar system (BASIL) is operational in Potenza, Italy, and it is capable of performing high-resolution and accurate measurements of atmospheric temperature and water vapor based on the ... -
Drop Shapes and Axis Ratio Distributions: Comparison between 2D Video Disdrometer and Wind-Tunnel Measurements
(American Meteorological Society, 2009)Comparisons of drop shapes between measurements made using 2D video disdrometer (2DVD) and wind-tunnel experiments are presented. Comparisons are made in terms of the mean drop shapes and the axis ratio distributions. Very ... -
Assessment of Cloudsat Reflectivity Measurements and Ice Cloud Properties Using Ground-Based and Airborne Cloud Radar Observations
(American Meteorological Society, 2009)A quantitative assessment of Cloudsat reflectivities and basic ice cloud properties (cloud base, top, and thickness) is conducted in the present study from both airborne and ground-based observations. Airborne observations ... -
CALIPSO Lidar Calibration Algorithms. Part I: Nighttime 532-nm Parallel Channel and 532-nm Perpendicular Channel
(American Meteorological Society, 2009)The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) mission was launched in April 2006 and has continuously acquired collocated multisensor observations of the spatial and optical properties of ... -
In-Flight Spectral Characterization and Calibration Stability Estimates for the Clouds and the Earth’s Radiant Energy System (CERES)
(American Meteorological Society, 2009)It is essential to maintain global measurements of the earth radiation budget (ERB) from space, the scattered solar and emitted thermal radiative fluxes leaving the planet. These are required for the purpose of validating ... -
Characteristics of the Raindrop Size Distribution and Drop Shape Relation in Typhoon Systems in the Western Pacific from the 2D Video Disdrometer and NCU C-Band Polarimetric Radar
(American Meteorological Society, 2009)The drop size distribution (DSD) and drop shape relation (DSR) characteristics that were observed by a ground-based 2D video disdrometer and retrieved from a C-band polarimetric radar in the typhoon systems during landfall ... -
Assessing Snowfall Rates from X-Band Radar Reflectivity Measurements
(American Meteorological Society, 2009)Realistic aggregate snowflake models and experimental snowflake size distribution parameters are used to derive X-band power-law relations between the equivalent radar reflectivity factor Ze and the liquid equivalent ... -
Construction of the RSS V3.2 Lower-Tropospheric Temperature Dataset from the MSU and AMSU Microwave Sounders
(American Meteorological Society, 2009)Measurements made by microwave sounding instruments provide a multidecadal record of atmospheric temperature in several thick atmospheric layers. Satellite measurements began in late 1978 with the launch of the first ... -
Automation: A Step toward Improving the Quality of Daily Temperature Data Produced by Climate Observing Networks
(American Meteorological Society, 2009)The research documented in this manuscript demonstrates that undeniable differences exist between values of daily temperature recorded by the National Weather Service Cooperative Observer Program network and data recorded ... -
A Comparison of VHF Radar Vertical-Velocity Measurements by a Direct Vertical-Beam Method and by a VAD Technique
(American Meteorological Society, 1991)Vertical-velocity measurements made by a direct vertical-beam method are compared to vertical velocities derived from VAD (velocity-azimuth display) measurements over a 27-h period. The results indicate that the two types ... -
Intercalibration of GOES-11 and GOES-12 Water Vapor Channels with MetOp IASI Hyperspectral Measurements
(American Meteorological Society, 2009)The calibrated radiances from geostationary water vapor channels play an important role for weather forecasting, data assimilation, and climate studies. Therefore, better understanding the data quality for radiance ... -
The CALIPSO Automated Aerosol Classification and Lidar Ratio Selection Algorithm
(American Meteorological Society, 2009)Descriptions are provided of the aerosol classification algorithms and the extinction-to-backscatter ratio (lidar ratio) selection schemes for the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) ... -
Spectral Bias Estimation of Historical HIRS Using IASI Observations for Improved Fundamental Climate Data Records
(American Meteorological Society, 2009)A prerequisite for climate change detection from satellites is that the measurements from a series of historical satellites must be consistent and ideally made traceable to the International System of Units (SI). Unfortunately, ... -
Fast k-Nearest-Neighbors Calculation for Interpolation of Radar Reflectivity Field
(American Meteorological Society, 2009)To efficiently implement the interpolation methods (e.g., Shepard?s method and its variants) for the radar reflectivity field, a fast method that calculates the k-nearest-neighbor nodes (sampling points in radar volume ... -
Validating the Validation: The Influence of Liquid Water Distribution in Clouds on the Intercomparison of Satellite and Surface Observations
(American Meteorological Society, 2009)The intercomparison of LWP retrievals from observations by a geostationary satellite imager [Spinning Enhanced Visible and Infrared Imager (SEVIRI) on board Meteosat Second Generation (MSG)] and a ground-based microwave ...