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| Titel |
Technical Note: Animal-borne CTD-Satellite Relay Data Loggers for real-time oceanographic data collection |
| VerfasserIn |
L. Boehme, P. Lovell, M. Biuw, F. Roquet, J. Nicholson, S. E. Thorpe, M. P. Meredith, M. Fedak |
| 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 ; 5, no. 4 ; Nr. 5, no. 4 (2009-12-15), S.685-695 |
| Datensatznummer |
250002740
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| Publikation (Nr.) |
 copernicus.org/os-5-685-2009.pdf |
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| Zusammenfassung |
| The increasing need for continuous monitoring of the world oceans has
stimulated the development of a range of autonomous sampling platforms. One
novel addition to these approaches is a small, relatively inexpensive
data-relaying device that can be deployed on marine mammals to provide
vertical oceanographic profiles throughout the upper 2000 m of the water
column. When an animal dives, the CTD-Satellite Relay Data Logger (CTD-SRDL)
records vertical profiles of temperature, conductivity and pressure. Data are
compressed once the animal returns to the surface where it is located by, and
relays data to, the Argos satellite system. The technical challenges met in
the design of the CTD-SRDL are the maximising of energy efficiency and
minimising size, whilst simultaneously maintaining the reliability of an
instrument that cannot be recovered and is required to survive its lifetime
attached to a marine mammal. The CTD-SRDLs record temperature and salinity
with an accuracy of better than 0.005 °C and 0.02 respectively.
However, due to the limited availability of reference data, real-time data
from remote places are often associated with slightly higher errors. The
potential to collect large numbers of profiles cost-effectively makes data
collection using CTD-SRDL technology particularly beneficial in regions where
traditional oceanographic measurements are scarce or even absent. Depending
on the CTD-SRDL configuration, it is possible to sample and transmit
hydrographic profiles on a daily basis, providing valuable and often unique
information for a real-time ocean observing system. |
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