音波探査装置による大気境界層の観測

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タイトル別名
  • MEASUREMENT OF PLANETARY BOUNDARY LAYER BY THE ACOUSTIC SOUNDER
  • オンパ タンサ ソウチ ニヨル タイキ キョウカイソウ ノ カンソク

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Acoustic sounder (Sodar) developed by the present authors and its application to thestudy of planetary boundary layer are described. The characteristics of the instrument aresummarized in the Table 2. In the field experiment the Sodar records are compared withtemperature records obtained with tethered balloon. It has been shown that facsimile echo oflaminated structure corresponds to the temperature inversion and, according to quantitativeanalysis, acoustic power is partially reflected from the discontinuity of air density at the tempe-rature inversion. Acoustic Doppler analysis has shown that the vertical Doppler velocity isten times as large as the phase velocity of echo ascending.

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