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Estimating absolute sea level variations by combining GNSS and Tide gauge data

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Title Estimating absolute sea level variations by combining GNSS and Tide gauge data
 
Creator Bos, M. S.
Fernandes, R. M. S.
Vethamony, P.
Mehra, P.
 
Subject GNSS
Sea level
Time-series analysis
 
Description 1327-1331
Indian
tide gauges can be used to estimate sea level rise. To separate relative sea
level rise from vertical land motion at the tide gauges, various GNSS stations
have been installed in the last years at, or nearby, tide gauges. Using the
PSMSL database, we have computed new sea level rise estimates for seven Indian
tide gauges with realistic error bars. These error bars should be combined with
the uncertainty of the vertical land motion to obtain the error bar of the
absolute sea level rise. Using the GNSS properties of two inland stations, Hyderabad and Bangalore,
as a proxy of the noise observed at the coastal stations, we conclude that around
5 years of observations are required to estimate the vertical land motion with
an accuracy of around 0.1 mm/yr. Since the error by which the relative sea
level rise can be estimated at the Indian tide gauges is mostly larger than 0.2
mm/yr, with the exception of Mumbai, such a small error of the vertical land
motion is sufficient to cause no noticeable effect on the accuracy of the
estimated absolute sea level rise.
 
Date 2016-06-27T04:32:17Z
2016-06-27T04:32:17Z
2014-07
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/34448
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.43(7) [July 2014]