Bottom/sub bottom geoacoustic properties must be determined to high spatial resolution in order to reduce false targets for bottom/buried mine detection. Inversion techniques (ITs) are used to infer bottom geoacoustic properties using AN/SQQ-32 beam reverberation level (RL) time series data acquired in Rhode Island Sound in February 1993. A technique was developed wherein the deviation of the RL for an individual ping and beam from an area-wide average RL is ...
A geometric model has been developed for analyzing observed Beaufort/Chukchi Sea temperature and salinity profiles based on their geometric features. It contains four major components: (a) a nonhomogeneous mesh difference scheme for second derivatives partial derivative 2T(Zk)/partial derivative Z2 and partial derivative 2S(Zk)/partial derivative Z2 at each data point (Zk, Tks, Sk); (b) a set of key depths (depths of mixed layer, upper and lower thermoclines and haloclines, and deep ...
Our long-term goal is to develop a low frequency ambient noise model capable of predicting extreme (loud/quiet) noise events in Arctic ice-covered waters due to the presence or absence of storms. We wish to determine the internal stress of the ice canopy covering the Arctic ocean due to convergent atmospheric forcing and relate this to energy dissipation rate due to ridge building, the major source of ambient noise in the ...
A research Chair in Arctic Marine Science has been established by the Chief of Naval Research to increase the awareness of naval operational concerns among national and international polar scientists across a broad spectrum of disciplines.
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