ICAR Research Data Repository for Knowledge Management
Temperature error in digital bathythermograph data
NOPR - NISCAIR Online Periodicals Repository
View Archive Info| Field | Value | |
| Title |
Temperature error in digital bathythermograph data
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| Creator |
Pankajakshan, Thadathil
Reddy, G. V. Ratnakaran, Lasitha Sarupria, J. S. Babu, V. Ramesh |
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| Subject |
Digital bathythermograph
Indian Ocean temperature error systematic bias |
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| Description |
234-236
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 oC, while it varied between -0.3 and -0.6 oC 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 oC, the observed DBT error, varying from -0.3 to -1 oC, is significant and such offsets should be removed from DBT archives. It is found that a corrective measure of +0.5 oC, 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 |
2009-05-22T11:35:49Z
2009-05-22T11:35:49Z 2003-09 |
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| Type |
Article
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| Identifier |
0379-5136
http://hdl.handle.net/123456789/4272 |
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| Language |
en_US
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| Publisher |
CSIR
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| Source |
IJMS Vol.32(3) [September 2003]
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