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Radiosonde raw data measured during POLARSTERN cruise PS138, links to files
No full textThe meteorological observatory Polarstern continuously performs radiosoundings during times of ship operation. Typically, there is one launch to full altitude at 12 UTC every day. Additionally, there often is a launch with a smaller balloon for forecasting purposes (helicopter operations) around 6 UTC. All data published here is left "as recorded", no quality control was applied
Radiosonde raw data measured during POLARSTERN cruise PS147/1, links to files
No full textThe meteorological observatory Polarstern continuously performs radiosoundings during times of ship operation. Typically, there is one launch to full altitude at 12 UTC every day. Additionally, there often is a launch with a smaller balloon for forecasting purposes (helicopter operations) around 6 UTC. All data published here is left "as recorded", no quality control was applied
Radiosonde raw data measured during POLARSTERN cruise PS135/2, links to files
No full textThe meteorological observatory Polarstern continuously performs radiosoundings during times of ship operation. Typically, there is one launch to full altitude at 12 UTC every day. Additionally, there often is a launch with a smaller balloon for forecasting purposes (helicopter operations) around 6 UTC. All data published here is left "as recorded", no quality control was applied
Plio-Pleistocene composite Alkenone, color reflectance, and oxygen isotope data from ODP Sites 175-1085 and 175-1087
No full textWe measured the unsaturation index (Uk'37) and concentration of C37 alkenones in sediment samples from Ocean Drilling Program (ODP) Sites 175-1085 and 175-1087 to quantify the evolution of sea surface temperatures (SSTs) and biological productivity (C37 Total) at the boundary between the Benguela Upwelling System (BUS) and Agulhas Current for the last 4 Ma. To calculate SSTs, we applied the linear core-top calibration of Müller et al. (1998, doi:10.1016/S0016-7037(98)00097-0). Alkenones were measured using a gas chromatograph with a flame ionization detector, Agilent Technologies, 6890/8890 equipped with an Agilent RTX-200 column. C37 alkenone concentrations were quantified using internal standards of n-hexatricontane and n-heptatriacontane and were normalized to the dry mass of sediment extracted for each sample. In addition, we present a composite of color reflectance (L*) at both sites (data and method according to: Wefer et al., 1998, doi:10.2973/odp.proc.ir.175.101.1998) and a composite of previously measured benthic oxygen and carbon isotope data at ODP Site 1085 (data and method according to: Anderson et al. (2000, doi:10.2973/odp.proc.sr.175.201.2001); Lisiecki and Raymo (2005, doi:10.1029/2004PA001071); Tachikawa et al., 2021; doi:10.1016/j.quascirev.2020.106752). The two age models (LR04 and orbitally tuned) and 1087-to-1085 depth match are also included. The age models and adjusted depths were calculated using the Match code from Lisiecki and Lisiecki (2002, doi:10.1029/2001pa000733). Finally, the data used to produce the adjusted depth (mbsf) depth scale for the two sites are included. The adjusted depth scale minimizes the unrealistic growth of composite sections due to core expansion via compressing each core by the rate of expansion, and then fine tuning the compression and offset relative to driller's depth, while aligning key features of the offset holes- similar to the process used by Hodell et al. (2015, doi:10.1016/j.gloplacha.2015.07.002)
Benthic foraminifera faunal total relative abundance data for the Marine Isotope Stage (MIS) 19 to MIS 28 interval of IODP Site 339-U1387, Gulf of Cadiz
No full textBottom current strength indicators for the Marine Isotope Stage (MIS) 19 to MIS 28 interval of IODP Site 339-U1387, Gulf of Cadiz
No full text
Dissolved total mercury and methylmercury concentrations in the Southern Ocean during the PS133/1 expedition (22 October – 9 November 2022)
No full textWater samples for total mercury (Hg) and methylmercury (MeHg) were collected in the Southern Ocean between 22 October and 9 November 2022 during the PS133/1 expedition, covering depths from 20 to 7000 m. Sampling was conducted using an ultraclean Titan rosette system (SBE-911Plus, Seabird) equipped with 24 × 12 L Ocean Test Equipment (OTE) bottles and a metal-free winch with a synthetic reinforced Vectran cable. After recovery, the clean CTD rosette was covered with clean plastic caps and transferred by trolley to an ISO Class 5 clean laboratory container. Each bottle was introduced through a clean airlock, rinsed externally with Milli-Q water from the container's integrated water treatment system, and subsampled following GEOTRACES ultraclean protocols. Samples for total Hg were collected unfiltered into pre-cleaned 60 mL glass vials to minimize contamination. Samples for MeHg were collected unfiltered into 250 mL HDPE Nalgene bottles and acidified to 0.4 % v/v with ultrapure trace-metal-grade HCl. Total Hg concentrations were determined using a custom single gold-trap purge and trap system following US EPA Method 1631. Dissolved MeHg concentrations were quantified by gas chromatography coupled to sector field inductively coupled plasma mass spectrometry (GC–SF–ICP–MS) with isotopic dilution calibration