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Title: Technical Note: Animal-borne CTD-Satellite Relay Data Loggers for real-time oceanographic data collection
Authors: Boehme, Lars
Lovell, Philip
Biuw, Martin
Roquet, F.
Nicholson, J.
Thorpe, S. E.
Meredith, M. P.
Fedak, Mike
Keywords: Southern-ocean
Elephant seals
GC Oceanography
Issue Date: 15-Dec-2009
Citation: Boehme , L , Lovell , P , Biuw , M , Roquet , F , Nicholson , J , Thorpe , S E , Meredith , M P & Fedak , M 2009 , ' Technical Note: Animal-borne CTD-Satellite Relay Data Loggers for real-time oceanographic data collection ' Ocean Science , vol 5 , no. 4 , pp. 685-695 . , 10.5194/os-5-685-2009
Abstract: 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 degrees 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.
Version: Publisher PDF
Description: Funded by NERC grants NE/E018289/1 and NER/D/S/2002/00426
Status: Peer reviewed
ISSN: 1812-0784
Type: Journal article
Rights: (c) Authors 2009. This work is distributed under the Creative Commons Attribution 3.0 License
Appears in Collections:NERC Sea Mammal Research Unit (SMRU) Research
University of St Andrews Research
Biology Research
Scottish Oceans Institute Research

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