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| Titel |
Automated gas bubble imaging at sea floor – a new method of in situ gas flux quantification |
| VerfasserIn |
K. Thomanek, O. Zielinski, H. Sahling, G. Bohrmann |
| 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 ; 6, no. 2 ; Nr. 6, no. 2 (2010-06-07), S.549-562 |
| Datensatznummer |
250003470
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| Publikation (Nr.) |
 copernicus.org/os-6-549-2010.pdf |
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| Zusammenfassung |
| Photo-optical systems are common in marine sciences and have been
extensively used in coastal and deep-sea research. However, due to
technical limitations in the past photo images had to be processed
manually or semi-automatically. Recent advances in technology have
rapidly improved image recording, storage and processing
capabilities which are used in a new concept of automated in situ
gas quantification by photo-optical detection. The design for an in
situ high-speed image acquisition and automated data processing
system is reported ("Bubblemeter"). New strategies have been
followed with regards to back-light illumination, bubble extraction,
automated image processing and data management. This paper presents
the design of the novel method, its validation procedures and
calibration experiments. The system will be positioned and recovered
from the sea floor using a remotely operated vehicle (ROV). It is
able to measure bubble flux rates up to 10 L/min with a maximum
error of 33% for worst case conditions. The Bubblemeter has been
successfully deployed at a water depth of 1023 m at the Makran
accretionary prism offshore Pakistan during a research expedition
with R/V Meteor in November 2007. |
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