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Electromagnetic induction measurements with the vertically oriented dipole of the CMD Mini Explorer (118 cm transmitter-receiver spacing) taken in the Ahr floodplain at Mayschoß, Rhineland-Palatinate (Germany)
No full textElectromagnetic induction (EMI) was measured with a CMD-Mini Explorer and a CMD Explorer (both GF Instruments s.r.o., Brno, Czech Republic) in June 2022. We used the vertical dipole (VDP) at coil spacings of 0.32 m (VDP1, CMD Mini Explorer), 0.71 m (VDP2, CMD Mini Explorer), 1.18 m (VDP3, CMD Mini Explorer), 1.48 m (VDP4, CMD Explorer), 2.82 m (VDP5, CMD Explorer) and 4.49 m (VDP6, CMD Explorer). With the existing coil spacings, effective penetration depths of 0.5 m (VDP1), 1.0 m (VDP2) and 1.8 m (VDP3) for the CMD Mini Explorer and 2.2 m (VDP4), 4.2 m (VDP5) and 6.7 m (VDP6) for the CMD Explorer could be achieved. According to the manufacturer, 70 % of the signal originate from above these depths. The EMI sensors measured the apparent electrical conductivity (ECa, in mS/m). Measurements were taken by carrying the instrument about 0.2 m (CMD Mini Explorer) respectively 0.9 m (CMD Explorer) above the ground while being directly connected to Differential -GPS (Leica GPS1200) for positioning. The acquisition rate was five measurements per second. Data quality was checked by measuring a reference line before and after each measurement. The maximum offset of the EMI values between the two time points was 1.2 mS/m. A correction of the data was not necessary. We removed the reference lines and single outliers. In addition, two interference areas were removed from all EMI data sets. (1) a L-shapped area, running from north to the center and then to east, in which an underground power cable runs. (2) an area on the north-eastern part of the measurement area. Information on the location and extent of the removed interference areas can be found in the enclosed explanation of the EMI measurements.
The data set contains the EMI data with an intercoil spacing of 1.18 m (VDP3, CMD Mini Explorer)
Experimental chlorophyll-a measurements from Arctic kelp communites of simulated marine heatwaves
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Coarse fraction of sediment core PS115/2_2
No full textSediment Core PS115/2-2 was recovered from the Amundsen Basin in 3600 m water depth at the eastern flank of the Gakkel Ridge during Polarstern Expedition PS115/2 in 2018 (Stein, 2019). The well-dated core is used to reconstruct in detail the interrelationship between ice-sheet dynamics and organic carbon burial in the central Eurasian Basin during the last 430 kyr, and to correlate marine and terrestrial records of the Eurasian Ice Sheet (EIS) history. For separation of the coarse fraction, large-sized samples of about 100 ml volume were taken every 5 cm, freeze-dried, weighed, and then sieved using a 63 µm sieve. The fraction >63 µm has been used for qualitative coarse-fraction analysis (e.g., determination of occurrences of foraminifers, coal fragments, detrital minerals etc.). For details and methods, we refer to Stein et al. (this paper)
Age model and linear sedimentation rates of sediment core PS115/2_2
No full textSediment Core PS115/2-2 was recovered from the Amundsen Basin in 3600 m water depth at the eastern flank of the Gakkel Ridge during Polarstern Expedition PS115/2 in 2018 (Stein, 2019). The well-dated core is used to reconstruct in detail the interrelationship between ice-sheet dynamics and organic carbon burial in the central Eurasian Basin during the last 430 kyr, and to correlate marine and terrestrial records of the Eurasian Ice Sheet (EIS) history. Our age model, a fundamental prerequisite for any kind of paleoclimatic reconstruction, is based on records of the inclination and relative paleointensity (RPI) of the Earth's magnetic field approved by rock magnetic data, 230Th and 231Pa excess (230Thex and 231Paex) records, and AMS14C ages. The listed tie points are used to develop the age model and to calculate linear sedimentation rates. For details and methods, we refer to Stein et al. (this paper)
Seawater carbonate chemistry and survival of different members in Antarctic macroalgal-associated amphipod assemblages
No full textTo assess how long-term acidification may influence the survival of different members in Antarctic macroalgal-associated amphipod assemblages, mesograzers, particularly amphipods, associated with the brown alga Desmarestia menziesii were collected from the immediate vicinity of Palmer Station, Antarctica (S64°46′, W64°03′) in January 2020 and maintained under three different pH treatments simulating ambient conditions (approximately pH 8.1), near-future conditions for 2100 (pH 7.7), and distant future conditions (pH 7.3) for 52 days then enumerated.
This dataset is included in the OA-ICC data compilation maintained in the framework of the IAEA Ocean Acidification International Coordination Centre (see https://oa-icc.ipsl.fr). Original data were downloaded from U.S. Antarctic Program Data Center (see Source) by the OA-ICC data curator. In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2024) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2025-07-02
Master track from POLAR 6 flight P6-257_IceBird_Winter_2025_2503250601 in 1 sec resolution (zipped, 1 MB)
No full textRaw data acquired by GPS1 position sensors on board research aircraft Polar 6 during the campaign P6-257_IceBird_Winter_2025 were processed to receive a validated master track which can be used as reference of further expedition data. Novatel FlexPak6 GPS receiver was used as navigation sensors during the campaign. Data were downloaded from AWI Datamanagement System (https://dms.awi.de) with a resolution of 1 sec. Processed data are provided as a master track with 1 sec resolution and a generalized track with a reduced set of the most significant positions of the master track. A detailed report on processing is also available for each flight
Master track from POLAR 6 flight P6-257_IceBird_Winter_2025_2503300901 in 1 sec resolution (zipped, 135 KB)
No full textRaw data acquired by GPS1 position sensors on board research aircraft Polar 6 during the campaign P6-257_IceBird_Winter_2025 were processed to receive a validated master track which can be used as reference of further expedition data. Novatel FlexPak6 GPS receiver was used as navigation sensors during the campaign. Data were downloaded from AWI Datamanagement System (https://dms.awi.de) with a resolution of 1 sec. Processed data are provided as a master track with 1 sec resolution and a generalized track with a reduced set of the most significant positions of the master track. A detailed report on processing is also available for each flight
Seawater carbonate chemistry and normalised phospholipidome profile of and metadata associated with the abdomen muscle of female Northern shrimp Pandalus borealis collected in the wild from four geogr
No full textThe dataset contains information on the phospholipidome profile of the abdomen muscle of female Northern shrimp Pandalus borealis collected in the wild from four geographic origins in the Northwest Atlantic: St. Lawrence Estuary (SLE; 48° 35' N, 68° 35' W, May 2018; Event SLE_Pandalus_2018), Eastern Scotian Shelf (ESS; 45° 23' N, 61° 04' W, February 2019; Event ESS_Pandalus_2019), Esquiman Channel (EC; 50° 44' N, 57°29' W, July 2019; Event EC_Pandalus_2019) and Northeast Newfoundland Coast (NNC; 50° 18' N, 54° 16' W, November 2019, Event NNC_Pandalus_2019). Female shrimp were exposed for 30 days under laboratory conditions to several ocean global change scenarios, with three temperatures (low temperature of 2 °C, intermediate temperature of 6 °C, and elevated temperature of 10 °C) and pH (current pH 7.75 and low pH 7.40). This experiment aimed to determine the changes in the phospholipidome profiles of shrimp from different origins in response to different scenarios of future ocean global changes combining Ocean Warming (OW) and Ocean Acidification (OA) and low dissolved oxygen (DO). Phospholipid species were quantified in abdomen muscle of female shrimp using high-resolution HILIC-MS/MS. Several datasets are provided, containing (i) the raw data expressed as peak area, (ii) the peak area data recalibrated to the internal standards for each class of phospholipid, and (iii) the final normalised data following transformation using ordered quantile normalisation, along with (iv) the metadata associated with abdomen muscle samples. A total of 269 phospholipids were identified and quantified from 260 female shrimp, with 10 shrimp per treatment exposed sampled from two tanks per treatment (5 shrimp in each). Phospholipid peak areas determined using Xcalibur data system v3.3 (Thermo Fisher Scientific, USA). Shrimp that molted/died during respirometry experiments were excluded from the analysis. Shrimp that were exposed to low DO were removed from the dataset prior to data transformation and downstream statistical analysis, but the raw data is provided.
This dataset is included in the OA-ICC data compilation maintained in the framework of the IAEA Ocean Acidification International Coordination Centre (see https://oa-icc.ipsl.fr). Original data were downloaded from the PANGAEA dataset (see Source). In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2024) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2025-07-09