Temperature error in digital bathythermograph data
DRS at CSIR-National Institute of Oceanography
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Title |
Temperature error in digital bathythermograph data
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Creator |
Pankajakshan, T.
Reddy, G.V. Ratnakaran, L. Sarupria, J.S. RameshBabu, V. |
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Subject |
Bathythermograph
Indian Oceanographic Data Centre |
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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.
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Date |
2006-09-20T11:24:15Z
2006-09-20T11:24:15Z 2003 |
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Type |
Journal Article
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Identifier |
Indian Journal of Marine Sciences, vol.32(3), 234-236p.
http://drs.nio.org/drs/handle/2264/413 |
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Language |
en
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Rights |
This digital version of the paper hosted with the permission from IJMS/NISCAIR. http://www.niscair.res.in |
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Format |
129487 bytes
application/pdf |
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Publisher |
NISCAIR, CSIR
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