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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.40 [2011] >
IJMS Vol.40(3) [June 2011] >
| Title: | Objective mapping of observed sub-surface mesoscale cold core eddy in the Bay of Bengal by stochastic inverse technique with tomographically simulated travel times |
| Authors: | Murty, T.V. Ramana
Rao, M.M. Malleswara
Sadhuram, Y.
Sridevi, B.
Maneesha, K.
Kumar, S. Sujith
Prasanna, P.L.
Murthy, K.S.R. |
| Keywords: | Tomography
Cold core eddy
Bay of Bengal
Forward problem
Inverse problem
EOF
Stochastic Inverse
SOFAR channel
Acoustic modeling |
| Issue Date: | Jun-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Present study consists the acoustic characteristics of a sub-surface cold
core eddy observed (below the mixed layer between depths of 50 and 300m, with a
diameter of about 200 km having temperature drop of 5ºC at the center) in the
Bay of Bengal during south-west monsoon season and explore possibility to
reconstruct the acoustic profile of the eddy by Stochastic Inverse Technique. A
simulation experiment on forward and inverse problems for observed sound
velocity perturbation field has been attempted for a range of 650 km (in the
vertical slice) keeping the single source-receiver configuration (at the
channel axis depth) in the SOFAR channel, under peculiar characteristics viz,
depth-limited environment and weak gradient waters of the Bay of Bengal. For
the formulation of the Stochastic Inverse, both vertical and horizontal
structure of the ocean has been modeled using empirical orthogonal modes.
Present Ocean Acoustic Tomography’s (OAT’s) simulation experiment results
reveal that one can objectively map/monitor even the small mesoscale
sub-surface eddies by stochastic inverse technique keeping single source and
receiver in the SOFAR channel separated probably by larger distances also under
such depth-limited environment of the Bay of Bengal. |
| Page(s): | 307-324 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.40(3) [June 2011]
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