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Temperature error in digital bathythermograph data

DRS at CSIR-National Institute of Oceanography

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Title Temperature error in digital bathythermograph data
 
Creator Pankajakshan, T.
Reddy, G.V.
Ratnakaran, L.
Sarupria, J.S.
RameshBabu, V.
 
Subject Bathythermograph
Indian Oceanographic Data Centre
 
Description Simultaneous Digital Bathythermograph (DBT) and Nansen Cast data collected during two cruises of R.V. Gaveshani (GV-117 and GV-118) and archived in Indian Oceanographic Data Centre (IODC) are used to determine existing temperature errors in DBT. The resulting mean error for DBT data from the GV-117 cruise varies from -0.5 to -1 degrees C, while it varied between -0.3 and -0.6 degrees C for data from cruise GV-118. For both the data sets, the error shows consistently negative bias from surface to 800 m depth, however there is no apparent or measurable systematic dependence of the error on depth. Considering the given temperature accuracy of 0.05 degrees C, the observed DBT error, varying from -0.3 to -1 degrees C, is significant and such offsets should be removed from DBT archives. It is found that a corrective measure of +0.5 degrees C, equivalent to the mean surface offset obtained from two cruises, can considerably reduce the temperature error at all DBT depths.
 
Date 2006-09-20T11:24:15Z
2006-09-20T11:24:15Z
2003
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, vol.32(3), 234-236p.
http://drs.nio.org/drs/handle/2264/413
 
Language en
 
Rights This digital version of the paper hosted with the permission from IJMS/NISCAIR.
http://www.niscair.res.in
 
Format 129487 bytes
application/pdf
 
Publisher NISCAIR, CSIR