Sommer, Stefan, Flögel, Sascha, Walter, Michael and Wenzhöfer, Frank (2022) Autonomous Robotic Network to Resolve Coastal Oxygen Dynamics : Cruise No. AL547, 20.10. – 31.10.2020, Kiel – Kiel, ARCODYN. . Alkor-Berichte, AL547 . GEOMAR Helmholtz Centre for Ocean Research Kiel, 24 pp. DOI 10.3289/CR_AL547.

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Abstract

The ALKOR cruise AL547 represents a concluding milestone of the Helmholtz innovation project
ARCHES (Autonomous Robotic Networks to Help Modern Societies). The aim was to implement
a heterogeneous robotic sensing network to simultaneously monitor changes in the water column
and at the seafloor. The network has been developed by a consortium of partners from AWI, DLR,
GEOMAR and the University of Kiel. The participating sensing platforms allow for real-time data
transfer and the entire network shall be able to autonomously respond to environmental changes
in the ocean. The network comprised seven different mobile and stationary platforms. Tests were
conducted at the Mittelgrund working area in the entrance of the Eckernförde Bay (western Baltic
Sea). During 47 stations the various sensing platforms were deployed and recovered for
maintenance. A total of 87853 messages were sent using hydro-acoustics, of which 71734
messages contained O 2 data, 15177 were status messages, 926 messages were commands to trigger
a change of the measurement behavior of a platform and 16 messages represented broadcasts about
the environmental status. We synoptically recorded short-term O 2 time series on the different
platforms, which were placed along a depth gradient in the working area. As the Eckernförde Bay
is known for sporadic fish kills by anoxia we hope to contribute to a better understanding of the
O 2 dynamics in coastal areas.

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