A systematic hailpad calibration procedure for operational hail suppression in Greece |
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| Authors: | N R Dalezios M V Sioutas T S Karacostas |
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| Institution: | (1) Present address: Envirotech Ltd, 132 Olympou Street, GR-54635 Thessaloniki, Greece;(2) Present address: Thessaloniki International Airport, Greek Agricultural Insurance Organization (ELGA), GR-55103 Thessaloniki;(3) Present address: Department of Meteorology and Climatology, Aristotelian University of Thessaloniki, GR-54006 Thessaloniki, Greece |
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| Abstract: | Summary Hailpads are used to provide quantitative hailfall measurements in several hail experiments and hail suppression operations around the world. The dented hailpads record the time-integrated size distribution and concentration of hailfall. In the five-year Greek National Hail Suppression Program (GNHSP) hailpad data have been used to estimate the global (impact) energy of hailswaths for the evaluation of the GNHSP.In this paper a systematic hailpad calibration procedure is developed applicable to operational programs. To meet this objective a calibration experiment has been conducted consisting of several tests to: consider differences between pad types; to examine the effects of ultra violet-light on hailpads for varying periods of time; to investigate the effect of painting and inking of the hailpad surfaces; to consider the effect of analyst's variability, loose hailpad stands, and bouneing; and to develop calibration eqqations. The concluded results seem to justify the design and performance of the hailpad calibration procedure.With 9 Figures |
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