[{"name":"oden-ryder-2019-sediment-detlef-lincoln-sea-1","title":"Sea-ice biomarkers and total organic carbon from sediment of Holocene age collected in the southern Lincoln Sea in 2019","summary":"This dataset includes sea-ice related biomarkers and the amount of total organic carbon from 15 surface sediment samples and two gravity cores collected during the Ryder 2019 Expedition with Swedish icebreaker Oden. The data were collected to reconstruct the Holocene variability in the southern Lincoln Sea sea-ice conditions.\r\n\r\nThe sea-ice related biomarkers include IP25 (short for Ice proxy with 25 carbon atoms) and brassicasterol. IP25 is produced by certain haptophyte algae living in brine channels at the bottom of seasonal sea-ice, while brassicasterol is a biomarker characteristic of marine phytoplankton productivity.\r\n\r\nFrom the IP25 and brassicasterol data the PBIP25 index has been calculated, which is a semi-quantitative measure of past sea ice conditions. The surface samples cover the northern end of Nares Strait, Petermann Fjord, the southern Lincoln Sea, and Sherard Osborn Fjord. The two gravity cores (Ryder19-12-GC1, Ryder19-14-GC1) are from the southern Lincoln Sea and cover the Holocene period.","citations":"Detlef H, O'Regan M, Stranne C, M\u00f8rk Jensen M, Glasius M, Cronin TM, Jakobsson M, Pearce C (2023) Seasonal sea-ice in the Arctic\u2019s last ice area during the Early Holocene. Commun Earth Environ 4:86. doi:10.1038\/s43247-023-00720-w","comments":"This dataset is related to the following datasets:\r\n- [Physical properties of marine sediment cores from the Ryder 2019 expedition](https:\/\/bolin.su.se\/data\/oden-ryder-2019-sediment-mscl-1)\r\n- [Geochemical XRF core scanning data of marine sediment cores from the Ryder 2019 expedition](https:\/\/bolin.su.se\/data\/oden-ryder-2019-sediment-xrf-1).\r\n\r\nThe bulk density and XRF Ca\/Ti ratios from Ryder19-12-GC1 and Ryder19-14-GC1 were used for lithological correlation and age modelling of the two cores. Please see the associated publication for details. Coordinates for the gravity core sites can also be found in the two related datasets.\r\n\r\nData were collected during the [Ryder 2019 expedition](https:\/\/polarforskningsportalen.se\/en\/arctic\/expeditions\/ryder-2019) on board the Swedish icebreaker (I\/B) Oden, which was organized by the Swedish Polar Research Secretariat.","category":"Marine","subcategory":"Sediment cores","keywords":"Sea ice; Biomarkers; Holocene; Lincoln Sea; Ryder 2019 expedition; Icebreaker Oden","scientist":"Henrieka Detlef, Matt O'Regan, Christian Stranne, Mads M\u00f8rk Jensen, Marianne Glasius, Thomas M. Cronin, Martin Jakobsson, Christof Pearce","firstname":"Henrieka","lastname":"Detlef","address":"Department of Geoscience, Aarhus University","postalcode":"8000","city":"Aarhus C","province":"","country":"Denmark","parameters":"Earth science > Oceans > Marine sediments","location":"Ocean > Arctic Ocean","progress":"Completed","language":"English","project":"The Ryder 2019 expedition was financially supported by the Swedish Polar Research Secretariat, the Centre for Coastal and Ocean Mapping at the University of New Hampshire, Stockholm University, and the Nippon Foundation of Japan. This research has received funding from the Aarhus Universitets Forskningsfond (grant no. AUFF-E-17-7-22 to Christof Pearce), the Vetenskapsr\u00e5det (grant no. 2016-04021 to Martin Jakobsson; grant no. 2020-04379 to Matt O'Regan, grant no. 2018-04350 to Christian Stranne), and the European Union\u2019s Horizon 2020 research and innovation programme under the Marie Sk\u0142odowska-Curie grant agreement no. 882893 (H2020-MSCA-IF-2019 grant no. 882893 to Henrieka Detlef) . Thomas M. Cronin was funded by the U.S. Geological Survey Climate R & D Program. \u201dAny use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.\u201d","publisher":"Bolin Centre Database","version":"1","constrains":"","access":""}]