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<br />'1'- ... <br /> <br />~, <br /> <br />~ ; <br /> <br />REMOTE SENSING OF GRAVITY WAVES <br />AND THEIR EFFECT ON CLOUD DEVELOPMENT <br /> <br />by <br /> <br />David A. Matthews <br /> <br />Bureau of Reclamation <br /> <br />Denver, Colorado <br />fI A 'J 1175 <br /> <br />I. Background and Importance <br /> <br />Gravity waves are an important mesoscale triggering mechanism which <br /> <br />occur often and affect 1 arge regions. They have been associ ate!d <br /> <br />with the development and propagation of severe convective storms <br /> <br />observed in NHRE (Chester, 1977). Brunk (1949) observed a solitary <br /> <br />pulse or a wave oscillation produced by a thunderstonn and associated <br /> <br />this with gravity waves. Gossard and Munk (1954) discussed the! <br /> <br />theoretical aspects of gravity waves and their energy transfer in <br /> <br />the atmosphere. With the development of modern remote sensing <br />techniques during the 1960's and 1970's, the detailed structurE! of <br />gravity waves has been observed by FM..CW radar (Gossard and Ric:hter, <br /> <br />1970), LIDAR (Lane et al., 1971, and Hall, 1974), and by SODAR and <br /> <br />'-.~ <br />"'-, <br /> <br />echosond systems (Brown and Hall, 1978, Emmanuel, 1972, and <br />Kjelaas et al., 1974). Gravity waves have also been observed by <br />remote sensing systems on geosynchronous satellites. A recent <br />report by Thomas et al., 1975, shows that gravity waves are wi dely <br />