Atmospheric pressure jumps measured with arrays of sensitive pressure sensors in the vicinity of Chicago's O'Hare International Airport
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Atmospheric pressure jumps measured with arrays of sensitive pressure sensors in the vicinity of Chicago's O'Hare International Airport

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  • Personal Author:
  • Corporate Authors:
    Wave Propagation Laboratory
  • NOAA Program & Office:
    OAR (Oceanic and Atmospheric Research)
  • Description:
    We describe an experiment designed to evaluate the use of arrays of sensitive pressure sensors for gust-front detection. First results of the experiment (which is still underway at Chicago's O'Hare airport in conjunction with the Transportation Systems Center of the Department of Transportation) have demonstrated the feasibility of predicting the motion of such density currents by using an array of such sensors. Using data sets obtained in June through August of 1976 we discuss their implications for the design of arrays to provide warnings of gust front systems in airport environments. Although we tracked over 80% of the pressure jumps over the O'Hare system, several events went undetected at two or more of the outer array locations. We therefore conclude that the optimum array density will involve a compromise between practicality and a need for high reliability in detection. The current outer array configuration of absolute pressure sensors seems to represent the minimum array dimensions and density needed for detection and tracking. Although a 1 km spacing permits resolution of small-scale features, to obtain accurate velocity computations (permitting prediction) increased spacings (to about 2 km) and/or more pressure jump detectors seem necessary.
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  • Series:
    NOAA technical memorandum ERL WPL ; 28
  • Document Type:
    Technical Memorandum
  • Place as Subject:
    Chicago (Ill.)
  • License:
  • Rights Information:
    CC0 Public Domain
  • Compliance:
    Library
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