CORRELATION ANALYSIS OF THE CELLULAR STRUCTURE OF STORM OBSERVED BY RAINGAUGES

Storm rainfall patterns often show random cellular structure which can be described by both spatial and temporal correlation functions calculated from short-interval precipitation measurements. A network of 16 raingauges with approximately 1 km spacings was operated at Cardington by the British Meteorological Office from 1957 to 1962. The gauges measured the amount of rain falling in intervals of two minutes during a series of mainly summer storms. Techniques developed for the study of moving diffraction patterns produced by radio sounding the ionosphere have been applied to this data. The spatial scale of the pattern, its velocity, and its mean lifetime may be deduced from the time variations in rainfall recorded at three suitably spaced gauges. This analysis has been applied to various groups of gauge records from a particularly long storm and has shown good agreement with the relevant upper air data. A dominant surface rainfall "cell" size of 2.8 km by 1.3 km was found from the two minute total rainfall records. This initial study demonstrates the potential of this correlation technique in describing the small scale structure of rainstorms, in quantitative terms, using records from a small number of fast-response gauges. /AUTHOR/

  • Corporate Authors:

    North-Holland Publishing Company

    P.O. Box 211
    1000 AE Amsterdam,   Netherlands 
  • Authors:
    • Felgate, D G
    • Read, D G
  • Publication Date: 1975-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 191-200
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00097611
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 29 1975 12:00AM