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Photosynthetic efficiency and symbiont cover of Amphistegina lobifera measured by PAM fluorometry and CLSM during a menthol-DCMU bleaching experiment (Nov–Dec 2022, Bremen, Germany)

This dataset contains experimental data from a one-month aquarium-based bleaching experiment conducted on Large Benthic Foraminifera (Amphistegina lobifera) from 16 November to 16 December 2022 at the Marine Experimental Facility of the Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany. The aim of the experiment was to obtain symbiont-free A. lobifera individuals for future re-inoculation studies and symbiont switching experiments. The foraminifera were originally collected in May 2022 at the Interuniversity Institute for Marine Sciences (IUI) in Eilat, Israel (29°30'07.8N, 34°55'04.9E) and maintained in culture in Germany until the start of the experiment. To assess the effectiveness of two chemical agents—menthol and 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU)—in disrupting symbiosis, photosynthetic efficiency (measured as maximum quantum yield, Fv/Fm) was recorded every other day during the first week of the experiment using a Pulse-Amplitude-Modulated (PAM) fluorometer. Fv/Fm measurements were discontinued after the first week due to complete inhibition of photosynthesis. Symbiont coverage (%) was assessed on day one and then weekly until week four using Confocal Laser Scanning Microscopy (CLSM).

Fixed-wing Magnetics NOGRAM I + II

In 1998, as part of the expedition NOGRAM I (Northern Gravity, Radio Echo Sounding and Magnetics), a flight campaign was carried out over the Lincoln Sea north of Greenland with the Polar 2 aircraft (Dornier 228-100) in cooperation with the Alfred Wegener Institute Helmholtz Center for Polar and Marine Research. A second flight campaign NOGRAM II took place in 2011 with the Polar 5 (Basler BT-67) over the Wandel Sea north of Greenland. The aim of the research was the structure and architecture of the upper Earth’s crust underneath the ice-covered offshore areas of the Morris Jesup Plateau and coastal waters north of Greenland. The airborne magnetic surveys were carried out with a flight line spacing of 3 km, and control profiles were flown every 30 km. During the two expeditions, 33000 km of line data were collected (16000 km in 1998, and 17000 km in 2011).

Multibeam bathymetry processed data (KONGSBERG EM712 working area dataset) of RV HEINCKE during cruise HE622, 'Tiefe Rinne' at Heligoland, North Sea

Multibeam bathymetry processed data (KONGSBERG EM712 multibeam echosounder) was collected onboard RV HEINCKE during cruise HE622 in the German North Sea (2023-06-06 - 2023-06-20) at 'Tiefe Rinne' at Helgoland. The raw data (.all format) were processed using QPS Qimera software (v 1.7), based on the following workflow: 0.Raw data > 1.Apply correct Sound Velocity Profiles -> 2.Create dynamic surface (shallow Mode) -> 3.Apply Spline Filter (Medium/Weak) > 4. Finalize with manual 2D and 3D editing, -> 5.Export in GeoTIFF format and projected in the UTM32N coordinate system (EPSG:32632). The bathymetry dataset here is gridded at 2 m resolution. The data products were created in the context of the DAM (German Marine Research Alliance), CONMAR research project.

Multibeam bathymetry raw data (Kongsberg EM712 entire dataset) of RV MARIA S. MERIAN during cruise MSM99

Multibeam bathymetry raw data using the ship's own Kongsberg EM 712 multibeam echosounder was not continuously recorded during RV MARIA S. MERIAN cruise MSM99. Data was recorded on 16 days between 2021-02-26 and 2021-03-19. This dataset contains 13x survey lines (occasionally with some line crossing perpendicular to the track) in the Baltic Sea and Gulf of Bothnia. The approximate average depth of the entire dataset is around 150m, ranging from 280m to 22m. No ancillary sound velocity profiles (SVP) files from the cruise are added to this dataset. Data analysis of the multibeam raw data revealed that SVP has been changed several during the survey. This publication is conducted within the efforts of the German Marine Research Alliance in the core area 'Data management and Digitalization' (Deutsche Allianz Meeresforschung, DAM). Data are unprocessed and therefore contains incorrect depth measurements (artifacts) without further processing. Note that refraction errors can be expected due to the lack of proper SVP. Overall, it appears that the data quality is rather good since the gridded hillshade data showed relatively few obstacles. Data can be processed e.g. with the open source software package MB-System (Caress et al. 2024, https://doi.org/10.5281/zenodo.6302801).

Multibeam bathymetry raw data (R2Sonic SONIC 2024 entire dataset) of RV ELISABETH MANN BORGESE during cruise EMB304

Multibeam bathymetry raw data using the ship's own R2Sonic SONIC 2024 Wideband multibeam echosounder was not continuously recorded during RV ELISABETH MANN BORGESE (EMB) cruise EMB304. Data was recorded on 3 separate days (2022-10-25, 2022-10-29, 2017-10-30. This dataset contains a survey in the Baltic Sea. The system settings of the device were set prior to the cruise and data acquisition was not entirely monitored during the survey time. This publication is conducted within the efforts of the German Marine Research Alliance in the core area 'Data management and Digitalization' (Deutsche Allianz Meeresforschung, DAM). This dataset is considered to be a test dataset for the incorporation of data from EMB into PANGAEA. The software QINSy from QPS was used for data recording. Data is stored with the regular QINSy data format .db and the auxiliary .xtf data format. Data are not compatible with the open source software package MB-System (Caress, D. W., and D. N. Chayes, MB-System: Mapping the Seafloor, http://www.mbari.org/products/research-software/mb-system/, 2022), therefore - as up to this publication date – professional software like CARIS HIPS/SIPS or QPS QIMERA is needed the post-process the data. Thus, individual data files could not be georeferenced by reading out the files itself using open-source software. Data files contained empty spaces " " in the file names. All files had to be renamed using underscores "_", since PANGAEA database does not allow the usage of spaces " " in file names. Data are unprocessed and therefore contain incorrect depth measurements (artifacts). Note that refraction errors can be expected due to the lack of accurate sound velocity profiles (SVP). Overall, it appears that the data quality differs. The gridded hillshade from data acquired on 2022-10-25 showed relatively many obstacles at the slant beams (bad data quality). Data acquired on 2022-10-29 show in general relatively less obstacles (very good data quality) with elongated structures on the seafloor without a distinct pattern. Data acquired on 2022-10-30 show in general a few obstacles (moderate data quality).

Multibeam bathymetry raw data (Kongsberg EM 712 transit dataset) of RV MARIA S. MERIAN during cruise MSM98

Multibeam bathymetry raw data was recorded in the North Sea during cruise MSM98 that took place between 2021-01-08 and 2021-01-23. The data was collected using the ship's own Kongsberg EM 712. This data is part of the DAM (German Marine Research Alliance) underway research data project.

Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV MARIA S. MERIAN during cruise MSM85

Multibeam bathymetry raw data was recorded in the Atlantic during cruise MSM85 that took place between 2019-07-23 and 2019-08-13. The data was collected using the ship's own Kongsberg EM 122. This data is part of the DAM (German Marine Research Alliance) underway research data project.

Water column raw data (Kongsberg EM712 entire dataset) of RV MARIA S. MERIAN during cruise MSM98

Water column raw data using the ship's own Kongsberg EM 712 multibeam echosounder was almost continuously recorded during RV MARIA S. MERIAN cruise MSM98. Data was recorded on 15 days between 2021-01-08 and 2021-01-22 located in the North Sea in shallow water. The corresponding .all files are published via https://doi.pangaea.de/10.1594/PANGAEA.937616 and https://doi.pangaea.de/10.1594/PANGAEA.928946 . This publication is conducted within the efforts of the German Marine Research Alliance in the core area 'Data management and Digitalization' (Deutsche Allianz Meeresforschung, DAM).

Charakterisierung von Schiffsemissionen und ihr Eintrag ins Meer

PlumeBaSe beschäftigt sich mit der detaillierten Analyse der Zusammensetzung organischer Aerosole, freigesetzt während der Verbrennung fossiler Treibstoffe durch Schiffe, und deren weiterem Weg in der marinen Umwelt. Durch die hochaufgelöste Beprobung der Aerosole und ihrer Transformationsprodukte vom Schiffsschornstein bis in die Ostsee wird eine Brücke zwischen Atmosphären- und Meeresforschung geschlagen. Der zunehmende globale Warentransport auf dem Wasserweg erhöht den Druck auf marine Ökosysteme. Große Schiffe emittieren, zusätzlich zu gasförmigen Schadstoffen, große Mengen an Partikeln reich an Spurenmetallen und organischen Schadstoffen zunächst in die Atmosphäre von wo aus die Schadstoffe ins Meer gelangen. Negative Auswirkungen saurer Oxide und organischer Schadstoffe sind bekannt, weniger hingegen wurde bisher die Deposition der Schiffsaerosole und deren Beitrag zur Meeresverschmutzung untersucht. Besonders lückenhaft ist das Verständnis für die Alterungsprozesse während des atmosphärischen Transports sowie in der Wassersäule, beispielweise durch UV-Strahlung oder reaktive Sauerstoffspezies, obwohl die Transformationsprodukte sehr unterschiedliche Auswirkungen auf Biota haben und die Molekülstruktur den weiteren Weg in der Umwelt maßgeblich beeinflussen können.Um diese Wissenslücken zu schließen, soll in PlumeBaSe durch eine vielschichtige Umweltbeprobung eine neuartige, umfassende Erhebung des Emissionstransports und der Aerosolalterung erreicht werden. Die Projektpartner des Leibniz Instituts für Ostseeforschung Warnemünde (IOW), der Universität Rostock (UR) und der Karls-Universität Prag (CU) befassen sich mit den folgenden zentralen Hypothesen: (H1) Schiffsemissionen tragen signifikant zur Verschmutzung des Oberflächenwassers bei, der Eintrag ist besonders hoch entlang der Hauptschifffahrtsrouten. (H2) Während des atmosphärischen und marinen Transports ändern sich die physikalischen (Partikelgrößenverteilung) und chemischen (molekulare Profile) Eigenschaften der emittierten Aerosole, was ihren weiteren Weg in der Umwelt beeinflusst. (H3) Die Veränderungen auf molekularer Ebene können verfolgt und genutzt werden um Schadstoffeinträge über die Atmosphäre von den über Nassabscheider eingebrachte Verschmutzungen zu unterscheiden.Diese angestrebten Zielsetzungen werden in drei Arbeitspaketen adressiert via I. Zeitlich und räumlich hochaufgelöster Analyse von Partikelgrößenverteilungen direkt in den Abgasfahnen der Schiffe unter Nutzung eines unbemannten Luftschiffes, kombiniert mit hochsensitiven gerichteten und ungerichteten chemischen Analysen der II. atmosphärischen Schadstoffe in Partikeln unterschiedlicher Größe, sowie der III. Schadstoffe im Meerwasser. Die Ostsee stellt durch die hohe Schiffsverkehrsdichte, gute Erreichbarkeit und Regulation der Schiffsemissionen ein ideales Untersuchungsgebiet dar, welches sich auch als Modellsystem für die Beeinflussung küstennaher Ozeane durch Schiffsverkehr weltweit eignet.

FZT 15: Der Ozean im Erdsystem; Ocean Margins - Research Topics in Marine Geosciences for the 21st Century, Sub project: Infrastructure, Support and Central Management

The research centre 'Ocean Margins' at the University of Bremen was established in July 2001 to geoscientifically investigate the transitional zones between the oceans and the continents. The work of the research centre is a cooperative effort, with expertise provided by the geosciences department and other departments of the university, as well as by MARUM (Center for Marine Environmental Sciences), the Alfred Wegener Institute for Polar and Marine Research, the Max Planck Institute for Marine Microbiology, the Center for Marine Tropical Ecology, and the Senckenberg Research Institute in Wilhelmshaven. Funded by the DFG, the studies focus on four main research fields: Paleoenvironment, Biogeochemical processes, Sedimentation Processes, and Environmental Impact Research. The term 'Ocean Margin' encompasses the region from the coast, across the shelf and continental slope, to the foot of the slope. Over 60 percent of the world's population live in coastal regions. These people have a long history of exploitation of coastal waters, including the recovery of raw materials and food. Human activity has recently been expanding ever farther out into the ocean, where the ocean margins have become more attractive as centers for hydrocarbon exploration, industrial fishing, and other purposes. The research themes of the centre range from environmental changes in the Tertiary to the impact of recent coastal construction, and from microbial degradation in the sediment to large-scale sediment mass wasting along continental margins. New full professorships and junior professorships have been established within the framework of this research centre. In addition to the primary research activities, a research infrastructure will be made available to outside researchers. Graduate education and the public understanding of science also play an important role. In the course of the first two rounds of the Excellence Initiative, the Research Centre was promoted to that status of a cluster of excellence, which has increased the amount of funding it receives up to the average amount of 6.5 million per annum received by clusters of excellence.

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