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Comparison of sea-level measurements between microwave radar and subsurface pressure gauge deployed at select locations along the coast of India

DRS at CSIR-National Institute of Oceanography

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Title Comparison of sea-level measurements between microwave radar and subsurface pressure gauge deployed at select locations along the coast of India
 
Creator Mehra, P.
Desai, R.G.P.
Joseph, A.
VijayKumar, K.
Agarvadekar, Y.
Luis, R.
Nadaf, L.
 
Subject sea level measurement
remote sensing
pressure gauges
harmonic analysis
 
Description Sea-level data are obtained from several remote and coastal locations using absolute pressure gauges deployed at known level, known as chart datum. However, to yield correct sea-level measurements from absolute pressure measurements, it is necessary to take into account the atmospheric pressure and water density at the measurement locations. We used data collected from microwave radar and an absolute pressure gauge deployed at Verem, Goa (January 2009 to May 2010), Tuticorin, and Mandapam, Tamil Nadu (June 2010 to March 2011) to carry out comparative studies. The root-mean-square difference between the estimated sea level from radar and pressure gauge (incorporating atmospheric pressure correction) is , ~ 2.69, 2.73, and 1.46 cm at Verem, Tuticorin, and Mandapam, respectively. Harmonic analysis of the two time-series of sea-level data at Verem produces similar residuals and tidal constituents. Our results indicate the importance of concurrent measurement of atmospheric pressure along with subsurface absolute pressure gauge measurements. Internet-based real-/near-real-time tracking and monitoring of sea level, sea state, and surface-meteorological conditions from a network of several island and coastal stations provides considerable information to disaster managers and local administrators during episodic events such as storms, storm surges, and tsunamis.
 
Date 2013-10-08T04:24:02Z
2013-10-08T04:24:02Z
2013
 
Type Journal Article
 
Identifier Journal of Applied Remote Sensing, vol.7(1); 2013; 16pp., doi: 10.1117/1.JRS.7.073569
http://drs.nio.org/drs/handle/2264/4374
 
Language en
 
Rights © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License.
Distribution or reproduction of this work in whole or in part requires full attribution of the original publication,
including its DOI. [DOI: 10.1117/1.JRS.7.073569]
 
Publisher SPIE