Tung, Chueh-Chen; Beermann, Jan; Sander, Lasse; Gutow, Lars: Sediment characteristics in the muddy region in southeast of the island of Helgoland (North Sea) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993036 (dataset in review)
Abstract:
Sediment were sampled on expedition HE625 of the R/V Heincke in July 2023 at 50 stations spread evenly over the muddy sediment region in southeast of the island of Helgoland (southeastern North Sea). At each station, two replicate samples were taken with a van Veen grab with a sampling area of 0.1 m² and a penetration depth of 10 cm. A subsample of the upper 6 cm of sediment was taken using a coring tube from the second grab with a diameter of 4.5 cm. The grain-size distribution was determined based on laser-diffraction granulometry using a CILAS 1180L particle size analyzer. Another sub-sample of 40 g of sediment were dried, weighed, and incinerated at 500 °C for five hours to estimate the organic content (%) as weight loss on combustion. Sediment variables included organic carbon content (OC), sediment composition (percentages of sand, silt, and clay), grain size (d10, d50, d90), and statistical measures of sediment grain size distribution (skewness, sorting, kurtosis).
Funding:
Landesamt für Umwelt (LfU), grant/award no. 0608.452217: Untersuchung der Tiefen Rinne bei Helgoland und der circalitoralen Schlickgebiete im schleswig-holsteinischen Küstenmeer (TRENCH)
Coverage:
Median Latitude: 54.087127 * Median Longitude: 8.001411 * South-bound Latitude: 53.975200 * West-bound Longitude: 7.652755 * North-bound Latitude: 54.221825 * East-bound Longitude: 8.386617
Date/Time Start: 2023-07-04T16:59:49 * Date/Time End: 2023-07-17T13:01:09
Minimum Elevation: -47.0 m * Maximum Elevation: -3.0 m
Event(s):
HE625_29-2 * Latitude: 54.222618 * Longitude: 8.386858 * Date/Time: 2023-07-03T05:57:30 * Elevation: -9.0 m * Location: North Sea * Campaign: HE625 (LABEL) * Basis: Heincke * Method/Device: Grab (GRAB) * Comment: rope length: 11m
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Sander, Lasse | |||
| 2 | Station label | Station | Sander, Lasse | OptionalLabelEvent | ||
| 3 | LATITUDE | Latitude | Sander, Lasse | Geocode | ||
| 4 | LONGITUDE | Longitude | Sander, Lasse | Geocode | ||
| 5 | DATE/TIME | Date/Time | Sander, Lasse | Geocode | ||
| 6 | Sorting | Sort | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | ||
| 7 | Skewness | Skew | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | ||
| 8 | Kurtosis | Kurt | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | ||
| 9 | Percentile 10 | Perc10 | µm | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | |
| 10 | Median, grain size | D50 | µm | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | |
| 11 | Percentile 90 | Perc90 | µm | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | |
| 12 | Gravel | Gravel | % | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | |
| 13 | Sand | Sand | % | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | |
| 14 | Clay | Clay | % | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | |
| 15 | Silt | Silt | % | Sander, Lasse | Laser diffraction particle size analyzer, CILAS, 1180L | |
| 16 | Organic matter | OM | % | Gutow, Lars | Ignition loss at 500°C | OC: dried, weighed, and incinerated at 500 °C for five hours, estimated as weight loss on combustion |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
600 data points