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CTD measurements at 8 stations of Senckenberg cruise SEN2212

CTD measurements taken during the Senckenberg cruise SEN2212 for the CONMAR project of the DAM research mission "Protection and Sustainable Use of Marine Areas". All measurements were taken the 3rd of May 2022 between Jade and Wangerooge in the German North Sea coast using a Sea And Sun CTD. Further data processing was undertaken using Sea And Sun's SDA SST software. Depth was calculated from pressure and latitude according to Fofonoff & Millard (1983) using python seawater 3.3.4 module.

Multibeam bathymetry processed data (Kongsberg EM710 working area dataset) of RV HEINCKE during cruise HE525

Swath sonar bathymetry data used for that dataset was recorded during RV Heincke during cruise He525 using the onboard Kongsberg EM 710 multibeam echosounder. The cruise took place between 2019-03-05 and 2019-03-08 in the German North Sea. Data were recorded on 3 days between 2019-03-05 and 2019-03-07. The approximate average depth of the entire dataset is around 20 m. To enhance MBES data accuracy, one sound velocity profile casts were conducted in the vicinity of the working area prior to the survey using sound velocity profiler MIDAS SVP 3000. After processing, these data were directly imported into the MBES Acquisition software Kongsberg SIS Seafloor Information System. Raw data were converted to MB-System format. Data were automaticallay and manually edited for false measurements. No further artificial sound velocity profiles were used during further processing. The data were corrected for tidal changes using data provided by the OSU Tidal Prediction Software OTPS that is retrievable through MB-System. The vertical datum of the data is now matched to mean sea level (MSL). Raster were calculated and stored in as GRD-files (Float-32, netCDF, EPSG 4326).

Multibeam bathymetry raw data (Kongsberg EM710 entire dataset) of RV HEINCKE during cruise HE525

Multibeam bathymetry raw data using the ship's own Kongsberg EM 710 multibeam echosounder was not continuously recorded during RV Heincke cruise He525. Data were recorded on 3 days between 2019-03-05 and 2019-03-07 in the German North Sea and data acquisition was continuously monitored during the survey. The survey was targeted to cover occurences of boulders in the North of Helgoland. Before data acquisition, sound velocity measurements using a sound velocity profil (SVP) probe were applied on the data for data calibration and are part of this dataset publication (He525_SVP_20190305.txt). Data are unprocessed and therefore may contain incorrect depth measurements without further processing. Data can be processed e.g. 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/, 2017).

Hydrographic parameters in Lake Constance in 2010

In the south-eastern part of Lake Constance a deep pockmark, a shallow pockmark station, as well as a reference station have been sampled for dissolved methane concentrations (with water samples) and hydrographic parameters with a Seabird CTD probe. The rosette was located within the pockmark with the help of a horizontal scanning sonar. In April 2010 no methane data are available.

Hydrographic parameters and dissolved methane in Lake Constance in 2008

In the south-eastern part of Lake Constance a deep pockmark, a shallow pockmark station, as well as a reference station have been sampled for dissolved methane concentrations (with water samples) and hydrographic parameters with a Seabird CTD probe. The rosette was located within the pockmark with the help of a horizontal scanning sonar.

Hydrographic parameters and dissolved methane in Lake Constance in 2007

In the south-eastern part of Lake Constance a deep pockmark, a shallow pockmark station, as well as a reference station have been sampled for dissolved methane concentrations (with water samples) and hydrographic parameters with a Seabird CTD probe. The rosette was located within the pockmark with the help of a horizontal scanning sonar.

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