Vriend, Nathalie M. and Hunt, Melany L. and Clayton, Robert W. and Brennen, Christopher Earls and Brantley, Katherine S. and Ruiz-Angulo, Angel (2008) Reply to comment by B. Andreotti et al. on "Solving the mystery of booming sand dunes". Geophysical Research Letters, 35 (L08). Art. No. L08307. ISSN 0094-8276 http://resolver.caltech.edu/CaltechAUTHORS:20111208-105043039
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This reply addresses three main issues raised in the comment of Andreotti et al. . First, the turning of ray paths in a granular material does not preclude the propagation of body waves and the resonance condition described by Vriend et al. . The waveguide model still holds in the dune for the observed velocities, even with a velocity increase with depth as implied by Andreotti et al. . Secondly, the method of initiation of spontaneous avalanching does not influence the booming frequency. The frequency is independent of the source once sustained booming starts; it depends on the subsurface structure of the dune. Thirdly, if all data points from Vriend et al.  are included in the analysis (and not an average or selection), no correlation is observed between the sustained booming frequency and average particle diameter.
|Additional Information:||© 2008 by the American Geophysical Union. Received 7 January 2008; accepted 3 March 2008; published 23 April 2008.|
|Official Citation:||Vriend, N. M., M. L. Hunt, R. W. Clayton, C. E. Brennen, K. S. Brantley, and A. Ruiz-Angulo (2008), Reply to comment by B. Andreotti et al. on “Solving the mystery of booming sand dunes”, Geophys. Res. Lett., 35, L08307, doi:10.1029/2008GL033202.|
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|Deposited By:||George Porter|
|Deposited On:||08 Dec 2011 19:20|
|Last Modified:||26 Dec 2012 14:35|
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