Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3881-3900 of 5084
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Aerosol Retrievals from the Multiyear Multisatellite AVHRR Pathfinder Atmosphere (PATMOS) Dataset for Correcting Remotely Sensed Sea Surface Temperatures
(American Meteorological Society, 2002)Eight-year (1990?98), two-satellite (NOAA-11 and -14), global daily ?(110 km)2 gridded observations from the Advanced Very High Resolution Radiometer (AVHRR) Pathfinder Atmosphere (PATMOS) dataset have been previously ... -
Aerosol Profiling Using a Tethered Balloon in Coastal Antarctica
(American Meteorological Society, 2002)The composition of air near ground level is not necessarily representative of the troposphere as a whole. In particular in the Antarctic, stratification from the strong inversions often present and scavenging by blowing ... -
Improved Polarimetric Calibration for Atmospheric Radars
(American Meteorological Society, 2002)Polarization properties of radar waves that are scattered from atmospheric objects are of great interest in meteorological studies. However, polarimetric radar measurements are often not sufficiently accurate for retrieving ... -
A New Pyrgeometer
(American Meteorological Society, 1986)Pyrgeometer measurements of the broadband infrared irradiance have hitherto been limited in accuracy because temperature gradients within the instrument produce spurious signals. A new pyrgeometer that has been demonstrated ... -
Beam Broadening Effect on Oblique MST Radar Doppler Spectrum
(American Meteorological Society, 2002)Beam broadening effect on Doppler spectrum for an obliquely pointed meso-, strato-, troposphere (MST) radar beam is investigated theoretically in this article. The general behavior of radial velocity on the cross section ... -
Removing Unwanted Fluctuations in the AVHRR Thermal Calibration Data Using Robust Techniques
(American Meteorological Society, 2002)The study deals with analysis of thermal calibration of the Advanced Very High Resolution Radiometer (AVHRR) aboard National Oceanic and Atmospheric Administration (NOAA) spacecrafts. In particular, the effects caused by ... -
Lidar Measurement of Ammonia Concentrations and Fluxes in a Plume from a Point Source
(American Meteorological Society, 2002)A field experiment was performed that demonstrated the ability of a scanning carbon dioxide (CO2) coherent lidar system to measure the concentration distribution of ammonia in a plume from a point source. This application ... -
Detection of Boundary Layer Water Clouds by Spaceborne Cloud Radar
(American Meteorological Society, 2002)A model for the radar reflectivity of boundary layer water clouds is constructed using cloud droplet spectra fitted to a truncated gamma distribution. The spectra were derived from several recent field experiments. Realistic ... -
A Microwave Occultation Observing System Optimized to Characterize Atmospheric Water, Temperature, and Geopotential via Absorption
(American Meteorological Society, 2002)A new remote sensing concept extrapolated from the GPS occultation concept is presented in which the signal frequencies are chosen to determine atmospheric water, temperature, and the geopotential of atmospheric pressure ... -
A Note on Alternatively Direct Measurement of the Transfer Resistance over Vegetation
(American Meteorological Society, 2002)The boundary layer transfer resistance is an important parameter in micrometeorology. The most common approach to determining it uses a wind function that is extremely sensitive to the specified roughness length and can ... -
Detectable Rain Range of Spaceborne Ka-band Radar Estimated from TRMM Precipitation Radar Data
(American Meteorological Society, 2002)A 14/35-GHz dual-wavelength radar is expected to be one of the next-generation spaceborne rain radars. The effect of rain attenuation at higher-frequency (35 GHz) radar with different minimum sensitivities was investigated ... -
A Small Portable Mie–Rayleigh Lidar System to Measure Aerosol Optical and Spatial Properties
(American Meteorological Society, 2002)The characteristics of a small, lightweight portable lidar system for measuring aerosol (Mie) scatter at wavelengths of 1064 and 532 nm are described. It uses a 20-Hz Nd:YAG pulsed laser as a source and a 12.7-cm-diameter ... -
Continuous Time–Space Sampling of Near-Surface Velocities Using Sound
(American Meteorological Society, 2002)A phased-array Doppler sonar (PADS) system is described that uses sound at frequencies near 200 kHz to probe an area several hundred meters on a side with 7?20-m spatial resolution. The area can be sampled every second or ... -
A Global View of Swell and Wind Sea Climate in the Ocean by Satellite Altimeter and Scatterometer
(American Meteorological Society, 2002)Numerous case reports and regional studies on swell and wind sea events have been documented during the past century. The global picture of these common oceanic phenomena, however, is still incomplete in many aspects. This ... -
A Thermal Device for Aircraft Measurement of the Solid Water Content of Clouds
(American Meteorological Society, 1986)A constant temperature probe for the measurement of solid water content of clouds is described. The probe is operated at a temperature of approximately 25°C, and is designed to collect and melt ice particles that impact ... -
Satellite and Skin-Layer Effects on the Accuracy of Sea Surface Temperature Measurements from the GOES Satellites
(American Meteorological Society, 2002)The latest Geostationary Operational Environmental Satellites (GOES) have facilitated significant improvements in the ability to measure sea surface temperature (SST) from geostationary satellites. Nonetheless, difficulties ... -
Improved Calibration Coefficients for NOAA-12 and NOAA-15 AVHRR Visible and Near-IR Channels
(American Meteorological Society, 2002)A time history of the calibration coefficients for channels 1 and 2 of the Advanced Very High Resolution Radiometer (AVHRR) on the NOAA-12 and NOAA-15 spacecraft is presented. The history is based on reflectances observed ... -
Theoretical Simulation and Experimental Characterization of an Expansion-Type Kelvin Spectrometer with Intrinsic Calibration
(American Meteorological Society, 2002)An expansion-type Kelvin spectrometer has been designed and its performance has been shown to agree with the theoretical simulation within experimental uncertainty. In the intrinsically calibrated mode, number concentration ... -
Spectrum Widths from Echo Power Differences Reveal Meteorological Features
(American Meteorological Society, 2002)A new Doppler spectrum width estimator using the absolute power differences (APDs) at lag one is presented, and its performance is evaluated using simulated signals as well as those recorded from the National Severe Storms ... -
The Role of Quantitative Infrared Imagery in Investigations of the Nocturnal Boundary Layer
(American Meteorological Society, 2002)During the Cooperative Atmospheric?Surface Exchange Study in 1999 (CASES99), an intensive investigation of the stable nocturnal boundary layer, a versatile and sensitive cryogenically cooled thermal imaging radiometer, the ...