Accession Number : ADA594660


Title :   Secretary of the Navy Professor of Oceanography


Descriptive Note : Final technical rept. 1 May 2011-30 Apr 2013


Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA


Personal Author(s) : Munk, Walter H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a594660.pdf


Report Date : 18 Nov 2013


Pagination or Media Count : 5


Abstract : The principal research effort has been towards an understanding the high-frequency tail of the surface gravity wave spectrum, lengths of 2 cm to 60 cm. These are principally responsible for wind drag on water. The analysis was based on a unique data set from geophones and hydrophones at 5 1/2 km depth midway between California and Hawaii. The measured spectral intensity around 10 Hz gives a more accurate measure of local winds than the standard satellite scatterometry. A spectral gap at the 30 Hz gravity to capillary transition offers new opportunities for spectral monitoring. We are making progress towards understanding the generation processes. A continuing effort towards the acoustic monitoring of ocean processes has been directed at the polar ocean cavities sandwiched between the floating ice sheet and the sea floor. We are exploring a possible tomography experiment in the Ross Sea with the goal of better predicting polar ice melting processes and the associated global rise in sea level.


Descriptors :   *ACOUSTIC DETECTION , *ACOUSTIC MEASUREMENT , *AIR WATER INTERACTIONS , *GRAVITY WAVES , *MELTING , *POLAR CAP , *SEA ICE , *SURFACE WAVES , ACOUSTIC SIGNATURES , ACOUSTIC TOMOGRAPHY , DRAG , GEOPHONES , HYDROPHONES , MONITORING , OCEAN SURFACE , PACIFIC OCEAN , SEA LEVEL , WIND


Subject Categories : Meteorology
      Physical and Dynamic Oceanography
      Acoustic Detection and Detectors
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE