Record Details

A study of meteorologically and seismically induced water level and water temperature oscillations in an estuary located on the west coast of India (Arabian Sea)

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title A study of meteorologically and seismically induced water level and water temperature oscillations in an estuary located on the west coast of India (Arabian Sea)
 
Creator Mehra, P.
Desai, R.G.P.
Joseph, A.
Vijaykumar, K.
Agarvadekar, Y.
Luis, R.
Viegas, B.
 
Subject sea level changes
temperature differences
earthquake prediction
 
Description The study examines the observed storm-generated sea-level oscillations (June 2007 and November 2009) during the Sumatra geophysical tsunami (September 2007), indicating similarities in the sea-level response in the Mandovi estuary, Goa. Sea-level and surface meteorological measurements carried out during storms exhibit strong synoptic disturbances leading to the coherent oscillations in the estuary with significant energy bands centred at periods of 24, 45, and 80 min. In particular, during the sporadic atmospheric event of June 2007, the atmospheric pressure dipped by approx. 12 mb, the wind direction stabilized to approx. 249 degrees with peak wind speed up to 16 m s sup(−1) and the positive sea-level surge swelled up by approx. 40 cm. Also, the water temperature cooled down by approx. 4.5 degrees C. Approximately 3 days prior to the 12 September 2007 Sumatra earthquake, the water temperature at Verem station, in Mandovi estuary started exhibiting a distinctly stronger semidiurnal oscillation (with a relatively larger variance of approx. 17.9 degrees C sup(2) in contrast to a lesser variance of approx. 12 degrees C sup(2) during the preceding normal days) and these well-defined oscillations continued to manifest for a week after the earthquake. The pre-earthquake enhanced seawater temperature oscillations observed at this tropical estuary provides an indication that routine monitoring of seawater temperature from tropical estuaries with fine temporal resolution may provide early information about impending coastal earthquakes.
 
Date 2012-06-05T07:03:29Z
2012-06-05T07:03:29Z
2012
 
Type Journal Article
 
Identifier Natural Hazards and Earth System Sciences, vol.12; 2012; 1607-1620
no
http://drs.nio.org/drs/handle/2264/4071
 
Language en
 
Relation Nat_Hazards_Earth_Syst_Sci_12_1607.jpg
 
Rights © Author(s) 2012. CC Attribution 3.0 License.
 
Publisher The European Geosciences Union