Journal of Atmospheric and Oceanic Technology: Recent submissions

Now showing items 3481-3500 of 5084

    • Some Techniques and Uses of 2D-C Habit Classification Software for Snow Particles 

      Holroyd, Edmond W. (American Meteorological Society, 1987)
      A technique has been designed that uses observable properties of images from a 2D-C optical array probe (size, linearity, area, perimeter, and image density) to classify unsymmetrical ice particles into nine habit classes. ...

    • Airborne Doppler Lidar Observations of Convective Phenomena in Oklahoma 

      McCaul, Eugene W.; Bluestein, Howard B.; Doviak, Richard J. (American Meteorological Society, 1987)
      On 30 June 1981, the wind fields around a variety of convective clouds, ranging from large thunderstorm complexes to isolated cumulus congestus, were observed in Oklahoma using an airborne Doppler lidar operated by the ...

    • Simulation of Radar Reflectivity and Surface Measurements of Rainfall 

      Chandrasekar, V.; Bringi, V. N. (American Meteorological Society, 1987)
      Raindrop size distributions (RSDs) are often estimated using surface raindrop sampling devices (e.g., disdrometers) or optical array (2D-PMS) probes. A number of authors have used these measured distributions to compute ...

    • Pressurized Icing Tunnel for Graupel, Hail and Secondary Raindrop Production 

      List, Roland; Lesins, G. B.; García-García, F.; McDonald, D. B. (American Meteorological Society, 1987)
      The closed-circuit icing wind tunnel with pressure control serves for experiments on the growth and melting of ice particles, such as graupel and hailstones, and the observation of shedding of rain-sized drops by growing ...

    • A Quality Control Program for Surface Mesometeorological Data 

      Wade, Charles G. (American Meteorological Society, 1987)
      A program is described which has been used to verify the quality of surface mesonet data collected during the Cooperative Convective Precipitation Experiment (CCOPE). The CCOPE mesonet consisted of 123 automated stations ...

    • Objective Method for Analysis and Tracking of Convective Cells as Seen by Radar 

      Rosenfeld, Daniel (American Meteorological Society, 1987)
      A special method has been developed for the study of cells that are embedded in convective rain systems. This method consists of a package of computer programs that use pattern recognition techniques on three-dimensional ...

    • An Optical Disdrometer for the Measurement of Raindrop Size Spectra in Windy Conditions 

      Illingworth, A. J.; Stevens, C. J. (American Meteorological Society, 1987)
      An instrument for measuring the size and concentration of raindrops is described which has the ability to function equally well in calm conditions and strong winds. Raindrops are detected optically in a shadowgraph-type ...

    • Acceptance of Lightning Detectors and Localization Systems under Different Damping Conditions 

      Schütte, Th; Pišler, E.; Filipovic, D.; Israelsson, S. (American Meteorological Society, 1987)
      The acceptance of individual lightning detectors, idealized detection networks using both loop antenna and time of arrival techniques, and the Swedish lightning localization network have been investigated. The calculations ...

    • Extinction and Liquid Water Content Measurements at CO2 Laser wavelengths 

      Nolan, P. F.; Jennings, S. G. (American Meteorological Society, 1987)
      Measurements have been made of both extinction coefficients in an evaporating laboratory cloud at wavelength ? = 10.591 ?m using a CO2 laser, and of liquid water content (LWC) at the center of the cloud using a continuous ...

    • A New Thermocouple Thermometer 

      Sugamura, Yasuo; Telford, James W. (American Meteorological Society, 1987)
      An accurate thermometer with fast response and high reliability has been designed and built by using a very fine copper-iron thermocouple coated with sputtered gold, and a newly available ultralow drift operational amplifier. ...

    • Application of the Lognormal Raindrop Distribution to Differential Reflectivity Radar Measurement (ZDR) 

      Feingold, Graham; Levin, Zev (American Meteorological Society, 1987)
      Use of the lognormal form of raindrop size distributions in simulations of differential reflectivity (ZDR) measurements is investigated. Using two remotely measured variables and an empirical relation, the three parameters ...

    • The Measurement of Precipitation with Synthetic Aperture Radar 

      Atlas, David; Moore, Richard K. (American Meteorological Society, 1987)
      The radar equation for the measurement of precipitation by SAR is identical to that for a conventional radar. The achievable synthetic beamwidth, ?s, is proportional to σv/U, the ratio of the spread of the precipitation ...

    • The Drop-Size Response of the CSIRO Liquid Water Probe 

      Biter, C. J.; Dye, J. E.; Huffman, D.; King, W. D. (American Meteorological Society, 1987)
      The response of the CSIRO liquid water content (LWC) device to water drops of different sizes has been investigated in a wind tunnel. Two series of experiments were conducted. The first compared the probe-measured LWC of ...

    • Radar Backscattering by Large, Spongy Ice Oblate Spheroids 

      Longtin, David R.; Bohren, Craig F.; Battan, Louis J. (American Meteorological Society, 1987)
      Calculations have been made of the radar backscattering, differential reflectivity, and circular depolarization ratio of large oblate spheroids composed of spongy ice. Results are compatible with laboratory measurements ...

    • Comments on “Error Determination of a Successive Correction Type Objective Analysis Scheme” 

      Glahn, Harry R. (American Meteorological Society, 1987)
      No abstract available.

    • Atmospheric Acoustic Minisounder 

      Asimakopoulos, D. N.; Helmis, C. G.; Stephanou, G. J. (American Meteorological Society, 1987)
      An improved version of a monostatic acoustic minisounder for the investigation of the structure and dynamics of the lower boundary layer, operating at high frequencies and equipped with a specially designed micro-antenna ...

    • Design and Calibration of a High Volume Fogwater Collector 

      Pade, Gerald; Covert, David; Larson, Timothy (American Meteorological Society, 1987)
      An inertial impactor is described that is designed to actively collect fog droplets from a flowing airstream. This collector samples 60 liters of air per second with a theoretical d50 currently set at 8 ?m. Collector ...

    • Airborne Tracking Sunphotometer 

      Matsumoto, Tak; Russell, Philip; Mina, Cesar; Van Ark, William; Banta, Victor (American Meteorological Society, 1987)
      An airborne tracking sunphotometer, mounted on the outside top surface of an aircraft has been developed to provide unrestricted viewing of the Sun. This instrument will substantially increase the data that scientists can ...

    • Digitization Noise in Power Spectral Analysis 

      Kristensen, L.; Kirkegaard, P. (American Meteorological Society, 1987)
      It is well-known that the digitization noise variance is ?2/12 for a continuous time series sampled with the signal resolution ?. It is also generally accepted that this variance often has a white-power spectral density. ...

    • Measurement of Turbulence in the Oceanic Bottom Boundary layer with an Acoustic Current Meter Array 

      Williams, Albert J.; Tochko, John S.; Koehler, Richard L.; Grant, William D.; Gross, Thomas F.; Dunn, Christopher V. R. (American Meteorological Society, 1987)
      A vertical array of acoustic current meters measures the vector flow field in the lowest 5 m of the oceanic boundary layer. By resolving the velocity to 0.03 cm s?1 over 15 cm paths, it samples the dominant turbulent eddies ...