Physical properties of sea ice cores from site BGC2 measured on legs 1 to 3 of the MOSAiC expedition ...

• Main Authors: Angelopoulos, Michael, Damm, Ellen, Simões Pereira, Patric, Abrahamsson, Katarina, Bauch, Dorothea, Bowman, Jeff S, Dumitrascu, Adela, Marsay, Christopher M, Rinke, Annette, Sachs, Torsten, Stefels, Jacqueline, Stephens, Mark, Verdugo, Josefa, Wang, Lei, Zhan, Liyang
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Arctic Ocean; brine; first-year ice; MOSAiC20192020; MOSAiC_BGC; MOSAiC_ECO; MOSAiC expedition; MOSAiC_ICE; MOSAiC_SNOW; Sea ice; second-year ice; Temperature and Salinity; Event label; Site; DATE/TIME; Utility; DEPTH, ice/snow; Salinity; Temperature, ice/snow; Density, ice; Volume, brine; Rayleigh number; Ice corer; see comment; Estimated from electrical conductivity and temperature of the melted ice samples; Linear interpolation at the midpoint of the sample based on the measurements from the ice temperature profile; after Cox & Weeks 1983; PS122/1; PS122/2; PS122/3; Polarstern; Arctic Amplification AC3; Arctic Research Icebreaker Consortium A strategy for meeting the needs for marine-based research in the Arctic ARICE; Multidisciplinary drifting Observatory for the Study of Arctic Climate MOSAiC; Ridges - Safe HAVens for ice-associated Flora and Fauna in a Seasonally ice-covered Arctic OCean HAVOC; Arctic; Fram Strait; ice core; North Pole
• Online Access: https://dx.doi.org/10.1594/pangaea.943812; https://doi.pangaea.de/10.1594/PANGAEA.943812

We present sea ice temperature and salinity data from first-year ice (FYI) and second-year ice (SYI) relevant to the temporal development of sea ice permeability and brine drainage efficiency from the early growth phase in October 2019 to the onset of spring warming in May 2020. Our dataset was collected in the central Arctic Ocean during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Expedition in 2019 to 2020. MOSAiC was an international transpolar drift expedition in which the German icebreaker RV Polarstern anchored into an ice floe to gain new insights into Arctic climate over a full annual cycle. In October 2019, RV Polarstern moored to an ice floe in the Siberian sector of the Arctic at 85 degrees north and 137 degrees east to begin the drift towards the North Pole and the Fram Strait via the Transpolar Drift Stream. The data presented here were collected during the first three legs of the expedition, so all the coring activities took place on the same floe. The ... : utility: Each core was retrieved for a different purpose. 'CH4' = methane, 'HALO' = halocarbon, 'BROMO' = bromoform, 'TEMP' = temperature (then used for subsequent analysis), 'CORE_LONG' = long sea ice core (top of ice surface to ocean) on rare days when short cores with higher ice depth resolution sampling were retrieved. The short cores were not included in the time series of the related study. Additional cores labelled 'ISO' (for stable water isotope analysis) are not shown here and were not included in the time series of the related study, because the sampling scheme for laboratory measurements changed during the field campaign. Normally, the BROMO or HALO core was used for temperature profiles at the BGC1, BGC2, and BGC3 sites. Note that the utility name represents a minimum utility for each core. For example, a BROMO core was sometimes used for HALO as well. This is because there were situations were melted ice samples of separate ice cores were combined for a given ice depth sampling range. Hence, ...