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| Titel |
High sampling rate thermistor string observations at the slope of Great Meteor Seamount |
| VerfasserIn |
H. Haren, R. Groenewegen, M. Laan, B. Koster |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 1, no. 1 ; Nr. 1, no. 1 (2005-05-10), S.17-28 |
| Datensatznummer |
250000097
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| Publikation (Nr.) |
 copernicus.org/os-1-17-2005.pdf |
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| Zusammenfassung |
| A high sampling rate (1 Hz) thermistor string has been built to accommodate
the scientific need to accurately monitor high-frequency and vigorous
internal wave and overturning processes in the ocean. The thermistors and
their custom designed electronics can register temperature at an estimated
precision of about 0.001° C with a response time faster than 0.25 s
down to depths of 6000 m. With a quick in situ calibration using SBE 911 CTD
an absolute accuracy of 0.005° C is obtained. The present string
holds 128 sensors at 0.5 m intervals, which are all read-out within 0.5 s.
When sampling at 1 Hz, the batteries and the memory capacity of the recorder
allow for deployments of up to 2 weeks. In this paper, the instrument is
described in some detail. Its performance is illustrated with examples from
the first moored observations, which show Kelvin-Helmholtz overturning and
very high-frequency (Doppler-shifted) internal waves besides occasionally
large turbulent bores moving up the sloping side of Great Meteor Seamount,
Canary Basin, North-Atlantic Ocean. |
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