/* DATA DESCRIPTION: Citation: Dale, Andy W; Lomnitz, Ulrike (2025): Particulate geochemistry of sediment core AL561_11-2 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.987332 Abstract: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise. Keyword(s): Geochemistry; MUC; North Sea; porewater; Porewater chemistry; Sediment Related to: Spiegel, Timo; Dale, Andrew W; Lenz, Nina; Schmidt, Mark; Moros, Matthias; Lindhorst, Sebastian; Wolschke, Hendrik; Müller, Daniel; Butzin, Martin; Fuhr, Michael; Kalapurakkal, Habeeb Thanveer; Kasten, Sabine; Wallmann, Klaus (2025): Mass accumulation rates decreased in the Skagerrak basin over the last 100 years. Continental Shelf Research, 286, 105411, https://doi.org/10.1016/j.csr.2025.105411 Spiegel, Timo; Dale, Andrew W; Lenz, Nina; Schmidt, Mark; Sommer, Stefan; Becker, Kevin W; Elling, Felix J; Porz, Lucas; Daewel, Ute; Fuhr, Michael; Kalapurakkal, Habeeb Thanveer; Wallmann, Klaus (2025): Benthic POC cycling in the Skagerrak basin: The role of lateral POC input. Continental Shelf Research, 293, 105536, https://doi.org/10.1016/j.csr.2025.105536 Spiegel, Timo; Dale, Andrew W; Lenz, Nina; Schmidt, Mark; Sommer, Stefan; Kalapurakkal, Habeeb Thanveer; Przibilla, Anna; Lindhorst, Sebastian; Wallmann, Klaus (2023): Biogenic silica cycling in the Skagerrak. Frontiers in Marine Science, 10, 1141448, https://doi.org/10.3389/fmars.2023.1141448 Spiegel, Timo; Diesing, Markus; Dale, Andrew W; Lenz, Nina; Schmidt, Mark; Sommer, Stefan; Böttner, Christoph; Fuhr, Michael; Kalapurakkal, Habeeb Thanveer; Schulze, Cosima; Wallmann, Klaus (2024): Modelling mass accumulation rates and 210Pb rain rates in the Skagerrak: lateral sediment transport dominates the sediment input. Frontiers in Marine Science, 11, 1331102, https://doi.org/10.3389/fmars.2024.1331102 Project(s): Anthropogenic impacts on particulate organic carbon cycling in the North Sea (APOC) (URI: https://www.apoc-project.de/en/) Coverage: LATITUDE: 58.747990 * LONGITUDE: 10.224040 DATE/TIME START: 2021-08-05T07:30:18 * DATE/TIME END: 2021-08-05T07:30:18 MINIMUM DEPTH, sediment/rock: 0.005 m * MAXIMUM DEPTH, sediment/rock: 0.435 m Event(s): AL561_11-2 (ALK561_11MUC3-2) * LATITUDE: 58.747990 * LONGITUDE: 10.224040 * DATE/TIME: 2021-08-05T07:30:18 * ELEVATION: -215.0 m * LOCATION: Skagerrak (URI: http://en.wikipedia.org/wiki/Skagerrak) * CAMPAIGN: AL561 (URI: https://doi.org/10.3289/CR_AL561) * BASIS: Alkor (1990) (URI: https://www2.bsh.de/aktdat/dod/fahrtplanung/Alkor.htm) * METHOD/DEVICE: MultiCorer (MUC) Parameter(s): DEPTH, sediment/rock [m] (Depth sed) * GEOCODE * PI: Dale, Andy W (adale@geomar.de) Replicate (Repl) * PI: Dale, Andy W (adale@geomar.de) Carbon, organic, total [%] (TOC) * PI: Dale, Andy W (adale@geomar.de) * METHOD/DEVICE: EURO EA Elemental Analyzer Calcium carbonate [%] (CaCO3) * PI: Dale, Andy W (adale@geomar.de) * METHOD/DEVICE: EURO EA Elemental Analyzer Water content, wet mass [%] (Water wm) * PI: Dale, Andy W (adale@geomar.de) Nitrogen, total [%] (TN) * PI: Dale, Andy W (adale@geomar.de) * METHOD/DEVICE: EURO EA Elemental Analyzer Sample code/label (Sample label) * PI: Dale, Andy W (adale@geomar.de) Porosity, volume (Poros vol) * PI: Dale, Andy W (adale@geomar.de) Sulfur, total [%] (TS) * PI: Dale, Andy W (adale@geomar.de) * METHOD/DEVICE: EURO EA Elemental Analyzer Carbon, total [%] (TC) * PI: Dale, Andy W (adale@geomar.de) * METHOD/DEVICE: EURO EA Elemental Analyzer License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) Status: Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels) Size: 393 data points */ Depth sed [m] Repl TOC [%] CaCO3 [%] Water wm [%] TN [%] Sample label Poros vol TS [%] TC [%] 0.005 A 1.7090 11.24162 75.44750 0.2305 9954 0.8824849 0.3075 3.0580 0.015 A 1.9710 13.36245 73.44933 0.2590 9955 0.8711418 0.3370 3.5745 0.025 A 1.9630 13.20828 70.00846 0.2585 9956 0.8508461 0.3265 3.5480 0.035 A 1.9540 13.23328 69.54530 0.2585 9957 0.8480373 0.3310 3.5420 0.045 A 1.9500 13.52078 68.06548 0.2580 9958 0.8389362 0.3220 3.5725 0.055 A 1.9350 13.69161 66.81696 0.2640 9959 0.8311036 0.3335 3.5780 0.065 A 2.0505 13.30828 65.92380 0.2700 9960 0.8254117 0.3200 3.6475 0.075 A 1.9420 13.47078 66.32767 0.2610 9961 0.8279948 0.3160 3.5585 0.085 A 1.8870 13.65411 55.02805 0.2525 9962 0.7493888 0.3110 3.5255 0.095 A 1.8085 14.47078 53.33446 0.2515 9963 0.7363587 0.3290 3.5450 0.105 A 1.8425 14.12494 54.86220 0.2515 9964 0.7481285 0.3255 3.5375 0.115 A 1.8770 15.14994 53.00250 0.2630 9965 0.7337624 0.3675 3.6950 0.125 A 1.9655 15.04161 52.71115 0.2710 9966 0.7314720 0.3520 3.7705 0.135 A 1.9750 14.93744 53.49553 0.2715 9967 0.7376134 0.3540 3.7675 0.145 A 1.8545 12.35828 50.48138 0.2425 9968 0.7135742 0.3140 3.3375 0.155 A 1.9730 14.30828 51.12383 0.2730 9633 0.7187990 0.3280 3.6900 0.165 A 2.0480 14.56661 49.93171 0.2800 9634 0.7090592 0.3405 3.7960 0.175 A 2.0435 14.74994 51.21160 0.2795 9635 0.7195085 0.3265 3.8135 0.185 A 2.0115 13.33745 50.80447 0.2495 9636 0.7162088 0.2775 3.6120 0.195 A 2.0730 13.28328 52.87246 0.2820 9637 0.7327414 0.3435 3.6670 0.205 A 2.0475 14.95827 53.74979 0.2870 9638 0.7395874 0.3630 3.8425 0.215 A 2.0690 15.25827 53.01776 0.2895 9639 0.7338820 0.3780 3.9000 0.225 A 2.0295 15.60827 53.71194 0.2850 9640 0.7392940 0.4400 3.9025 0.235 A 2.0105 15.99994 53.34850 0.2895 9641 0.7364682 0.4475 3.9305 0.245 A 2.0040 15.85410 52.21886 0.2870 9642 0.7275770 0.4505 3.9065 0.255 A 1.9650 15.82494 50.22181 0.2875 9643 0.7114473 0.4695 3.8640 0.265 A 2.0250 15.52077 48.52224 0.2855 9644 0.6972895 0.4645 3.8875 0.275 A 1.9915 15.84160 47.93410 0.2795 9645 0.6922945 0.5215 3.8925 0.285 A 1.9960 14.94577 46.69241 0.2635 9646 0.6815825 0.5355 3.7895 0.295 A 1.9820 15.98744 47.59004 0.2735 9647 0.6893491 0.5435 3.9005 0.305 A 1.9105 14.44994 47.21866 0.2520 9648 0.6861503 0.4075 3.6445 0.315 A 2.0170 14.94161 46.82182 0.2690 9649 0.6827096 0.4810 3.8100 0.325 A 2.0170 14.98744 47.05430 0.2690 9650 0.6847281 0.4390 3.8155 0.335 A 2.1065 14.74994 46.91752 0.2770 9651 0.6835415 0.4410 3.8765 0.345 A 2.1550 14.49578 47.14243 0.2825 9652 0.6854913 0.4065 3.8945 0.355 A 2.1700 14.35828 46.01858 0.2845 9653 0.6756729 0.3685 3.8930 0.365 A 2.0860 14.56244 46.64515 0.2795 9654 0.6811703 0.3665 3.8335 0.375 A 2.0175 15.05411 45.80365 0.2710 9655 0.6737733 0.3525 3.8240 0.385 A 2.0665 14.17078 45.44381 0.2620 9656 0.6705771 0.3135 3.7670 0.395 A 2.0380 14.31661 45.31895 0.2695 9657 0.6694635 0.3575 3.7560 0.405 A 1.9925 13.60828 53.32944 0.2475 9658 0.7363196 0.3145 3.6255 0.415 A 1.9395 14.68327 52.84356 0.2520 9659 0.7325143 0.3685 3.7015 0.425 A 1.8605 14.10828 52.66749 0.2370 9660 0.7311279 0.3715 3.5535 0.435 A 1.8365 14.32494 0.2420 0.3845 3.5555