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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.39 [2010] >
IJMS Vol.39(4) [December 2010] >
| Title: | Modelling of coastal ocean environment for underwater surveillance |
| Authors: | Prasada Rao, C V K |
| Keywords: | Ocean environment
Underwater surveillance
Sonar performance
1-D mixed layer models
Thermohaline structure |
| Issue Date: | Dec-2010 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Significance
of ocean environment for underwater surveillance, namely for sonar systems, has
been discussed in this paper. The passive as well as active sonar equations and
the various parameters which are important for assessing sonar performance from
environment point of view are highlighted. Some important published results
which are available in the literature on the modelling of thermohaline
structure of our coastal waters have been reviewed in this paper. Among 1-D
mixed layer ocean models the model by Niiler and Kraus1 shows lesser
deviations on Mixed Layer Depth (MLD) and Mixed Layer Temperature (MLT) when
compared to the observations. The model given by Price et al 2 simulates the Sea Surface Temperature (SST) and the
vertical profile of temperature. The comparison of simulated values with
observations revealed that the diurnal variability of SST is well represented
through this model but deviations are noticed in the thermocline zone. The 1-D
ocean models are simple and easy to implement for operational purposes because
they are computationally less intensive. However, it was found that these
models accumulate more error for long-term simulation due to non-inclusion of
advection processes which are important in coastal as well as open ocean
conditions. The observed and predicted results of a 3-D model proposed by
Blumberg and Mellor3, also known as Princeton Ocean Model (POM),
showed a reasonable good comparison and this model could simulate successfully
the Arabian Sea mini warm pool which is an important phenomenon that occurs in
the south-eastern Arabian Sea before the onset
of summer monsoon. |
| Page(s): | 616-622 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.39(4) [December 2010]
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