Krastel, Sebastian , Berndt, Christian , Held, Philipp, Geersen, Jacob , Bauer, Benedikt, Cornelius, Olav, Dürr, Marie-Luise, Eichler, Jacob, Mathe, Annika, Supka, Ruth, Tobisch, Chiara Alina and Ziehl, Anna (2022) Geophysical Student Field Trip Baltic Sea, Cruise No. AL579, 20.08.2022 – 28.08.2022, Kiel (Germany) – Kiel (Germany), GÜ Uni Kiel. . Alkor-Berichte, AL579 . CAU Kiel, 32 pp. DOI 10.3289/CR_AL579.

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Abstract

Research cruise AL579 is part of the bachelor course "Physics of the Earth System - Geophysics,
Meteorology and Oceanography" at the University of Kiel. It is the field exercise for marine
geophysics and hydroacoustics. The aim of the annually recurring cruise is to give students a
practical insight into the acquisition, processing, documentation, and interpretation of marine
geophysical data. AL579 took place from August 20th -28th 2022 with the main study areas in
Eckernförde Bay and the Bay of Mecklenburg. Parts of the scientific crew changed during a
stopover in Kiel on Wednesday, 24.8.2022. In Eckernförde Bay we mainly collected Multibeam
Echosounder (MBES) and INNOMAR Subbottom Echosounder (SES) data calibrated by CTD
measurements close to the pockmark field off Mittelgrund. On Wednesday, 24.8.2022 we tested a
new Ocean Bottom Seismometer (OBS) prototype. In the Bay of Mecklenburg, the focus was on
Blinkerhügel and the seafloor structures further west where an enigmatic stone structure was
discovered in 2021. This area was surveyed with Sidescan Sonar, MBES, SES, and CTD
measurements and several video transects with an underwater drone. We also collected two sets
of multi-channel seismic data to investigate the deeper structures of the Western Baltic Sea and
the Bay of Mecklenburg.

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