Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 1961-1980 of 5084
-
Latent Heat Flux Profiles from Collocated Airborne Water Vapor and Wind Lidars during IHOP_2002
(American Meteorological Society, 2007)Latent heat flux profiles in the convective boundary layer (CBL) are obtained for the first time with the combination of the Deutsches Zentrum für Luft- und Raumfahrt (DLR) water vapor differential absorption lidar (DIAL) ... -
Directional Validation of Wave Predictions
(American Meteorological Society, 2007)A methodology for quantitative, directional validation of a long-term wave model hindcast is described and applied. Buoy observations are used as ground truth and the method does not require the application of a parametric ... -
The Effect of Filter Dimension on the Subgrid-Scale Stress, Heat Flux, and Tensor Alignments in the Atmospheric Surface Layer
(American Meteorological Society, 2007)In field experiments designed to study subgrid-scale parameterizations for large eddy simulation, the flow field is often measured and then filtered in two-dimensional planes. This two-dimensional filtering serves as a ... -
Validation and Development of Melting Layer Models Using Constraints by Active/Passive Microwave Observations of Rain and the Wind-Roughened Ocean Surface
(American Meteorological Society, 2007)A physically based method is developed to estimate the microphysical structure of the melting layer in stratiform rain using airborne observations by a dual-frequency radar and a 10.7-GHz radiometer. The method employs a ... -
Variational Analysis of Oversampled Dual-Doppler Radial Velocity Data and Application to the Analysis of Tornado Circulations
(American Meteorological Society, 2007)For the detection of severe weather phenomena such as tornados, mesocyclones, and strong wind shear, the azimuthal resolution of radial velocity measurements is more important. The typical azimuthal resolutions of 1° for ... -
Using Wavelet Analysis to Detect Tornadoes from Doppler Radar Radial-Velocity Observations
(American Meteorological Society, 2007)A wavelet-based algorithm is developed to detect tornadoes from Doppler weather radar radial-velocity observations. Within this algorithm, a relative region-to-region velocity difference (RRVD) is defined based on the ... -
Degradation of Radar Reflectivity by Cloud Attenuation at Microwave Frequency
(American Meteorological Society, 2007)The main object of this paper is to emphasize that clouds?the nonprecipitating component of condensed atmospheric water?can produce a strong attenuation at operational microwave frequencies, although they present a low ... -
Determination of the Horizontal Pressure Gradient Force Using Global Positioning System on board an Instrumented Aircraft
(American Meteorological Society, 2007)The horizontal pressure gradient force is the single most important dynamical term in the equation of motion that governs the forcing of the atmosphere. It is well known that the slope of an isobaric surface is a measure ... -
High-Frequency Radar Mapping of Surface Currents Using WERA
(American Meteorological Society, 2007)A dual-station high-frequency Wellen Radar (WERA), transmitting at 16.045 MHz, was deployed along the west Florida shelf in phased array mode during the summer of 2003. A 33-day, continuous time series of radial and vector ... -
Angular Distribution Models for Top-of-Atmosphere Radiative Flux Estimation from the Clouds and the Earth’s Radiant Energy System Instrument on the Terra Satellite. Part II: Validation
(American Meteorological Society, 2007)Errors in top-of-atmosphere (TOA) radiative fluxes from the Clouds and the Earth?s Radiant Energy System (CERES) instrument due to uncertainties in radiance-to-flux conversion from CERES Terra angular distribution models ... -
Synoptic Modeling in the Eastern Arabian Sea during the Southwest Monsoon Using Upwelling Feature Models
(American Meteorological Society, 2007)Hydrographic observations along the western coast of India during the southwest (SW) monsoon season reveal upwelling in the equatorward surface flow and downwelling below the thermocline with a weak poleward undercurrent. ... -
SPARC: New Cloud, Snow, and Cloud Shadow Detection Scheme for Historical 1-km AVHHR Data over Canada
(American Meteorological Society, 2007)The identification of clear-sky and cloudy pixels is a key step in the processing of satellite observations. This is equally important for surface and cloud?atmosphere applications. In this paper, the Separation of Pixels ... -
Analysis of Radiosonde and Ground-Based Remotely Sensed PWV Data from the 2004 North Slope of Alaska Arctic Winter Radiometric Experiment
(American Meteorological Society, 2007)During 9 March?9 April 2004, the North Slope of Alaska Arctic Winter Radiometric Experiment was conducted at the Atmospheric Radiation Measurement Program?s (ARM) ?Great White? field site near Barrow, Alaska. The major ... -
Scaling Analysis of the Sea Surface Temperature Anomaly in the South China Sea
(American Meteorological Society, 2007)Based on the data of optimum interpolation sea surface temperature (OISST), the temporal correlations of the sea surface temperature anomaly (SSTA) in the South China Sea (SCS) are studied by using the rescaled range ... -
Determining Weather Radar Antenna Pointing Using Signals Detected from the Sun at Low Antenna Elevations
(American Meteorological Society, 2007)A method to determine the elevation and azimuth biases of the radar antenna using solar signals observed by a scanning radar is presented. Data recorded at low elevation angles where the atmospheric refraction has a ... -
Reconstruction of the Sizes of Spherical Particles from Their Shadow Images. Part I: Theoretical Considerations
(American Meteorological Society, 2007)Imaging optical array probes (OAPs) have become conventional instruments in studies of cloud microphysics. Previous works have shown that the error particle sizing in OAPs may reach 100%. Correcting the particle size ... -
A Method to Correct the Thermal Dome Effect of Pyranometers in Selected Historical Solar Irradiance Measurements
(American Meteorological Society, 2007)In using pyranometers to measure solar irradiance, it is important to know the magnitudes and the consequences of the thermal effect, which is introduced by the glass domes of the instruments. Historically, the thermal ... -
Statewide Monitoring of the Mesoscale Environment: A Technical Update on the Oklahoma Mesonet
(American Meteorological Society, 2007)Established as a multipurpose network, the Oklahoma Mesonet operates more than 110 surface observing stations that send data every 5 min to an operations center for data quality assurance, product generation, and dissemination. ... -
Measurement of Total Water with a Tunable Diode Laser Hygrometer: Inlet Analysis, Calibration Procedure, and Ice Water Content Determination
(American Meteorological Society, 2007)The University of Colorado closed-path tunable diode laser hygrometer (CLH), a new instrument for the in situ measurement of enhanced total water (eTW, the sum of water vapor and condensed water enhanced by a subisokinetic ... -
A CCD Spectroradiometer for Ultraviolet Actinic Radiation Measurements
(American Meteorological Society, 2007)A new spectroradiometer for spectral measurements of ultraviolet (UV) atmospheric radiation (290?400 nm) using a charge coupled device (CCD) as a detector is introduced. The instrument development is motivated by the need ...