cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.929095
title: Whale sightings during POLARSTERN cruise ARK-XXVII/2 (PS80/2)

description: Data on whale distribution and abundance in the polar oceans is rather sparse, as implementing the standard surveying method, line-transect surveys, is challenging and costly. To overcome this problem, we initiated a program to electronically log all opportunistic cetacean sightings during all Polarstern expeditions through the nautical officer on watch. Opportunistic (visual) sightings by naked eye were logged during Polarstern Cruise ARK-XXVII/2 (Longyearbyen -Tromsø ) by the nautical officer on duty using a customized Software package (WALOG, WhAleLOGger) installed on a touch screen laptop located on the ship's bridge. Species were identified by naked eye or handheld binoculars (7x50) to the lowest possible taxonomical level and assigned a “certainty” level of identification. The number of animals were counted if possible or estimated for larger groups. Whenever identification to species level was not possible, the next identifiable taxonomical category was assigned. Information on sighting position, date and time are automatically transferred from the ship's DAVIS-Ship System (https://dship.awi.de/) to the WALOG software at the time of logging. Photographs were taken if possible for retrospective analysis. All data of acquired sightings were retrospectively validated by a marine biologist and converted to a standard format. To this end, plausibility of sighting time, location, standardization of species names, eventual comments added at the time of sighting, as well as additional information such as photographs (if available) were checked either to verify or improve species identification. Datasets are used in species distribution modelling and to inform interested parties about occurrences.
description: Date/Time is given in UTC. Certainty of identification: definite if observer clearly identified the species. The number of individuals is binned according to the options given in the data acquisition software: 1, 2, 3, less equal 5, less equal 10, greater than 10, greater than 20. More precise values may exist, due to observer comments.
DOI: 10.1594/pangaea.929650
title: SF6 and CFC12 in the water column during POLARSTERN cruise PS106/2 (ARK-XXXI/1.2)

description: Dissolved gases that act as passive transient tracers have become increasingly popular in physical oceanography for determining the age of a water mass as well as its circulation. In particular, chlorofluorocarbon CFC12 and Sulfur Hexafluoride SF6 are most adapted for comparatively deep water masses that may be several decades old. We here present the full depth concentrations of CFC12 and SF6 from samples collected in June-July 2017 as part of the Polarstern expedition PS106.2 (ARK-XXXI/1.2) ”SiPCA” north of Svalbard, from the shelf to the Nansen abyssal plain. During selected casts, up to ten samples were collected from the Niskin (as first sample collected upon opening of the Niskin). All Niskin bottles had been cleaned with isopropanol beforehand. Samples were collected by connecting a 300 ml glass ampoule to the Niskin tap via an airtight stainless steel system. We let the ampoule fill three times for rinsing, screwed the system shut after the fourth filling, and immediately put the ampoule in icy cold water. These ampoules were flame sealed immediately after collection, one at a time, so that the last sample was sealed at worst a few hours after the cast. The samples were analysed on land in the months that followed the expedition, at the GEOMAR Helmholtz Zentrum für Ozeanforschung, according to the method described in Stöven (2011). These concentrations will now contribute both to local studies of the Svalbard shelf break and its ecosystem, but also to our understanding of the large scale circulation of deep water masses in the Arctic Ocean.
description: Concentrations in SF6 and CFC12 in the water column from samples collected from R/V Polarstern during expedition PS106.2 "SiPCA", June-July 2017, north of Svalbard. The samples were flame-sealed onboard by S. Sahlin, and analysed on land by T. Tanhua and T. Stöven at the GEOMAR Helmholtz Zentrum für Ozeanforschung. The quality control flag values are the same as WOCE: 2=good, 3=probably bad, 4=known bad, 9=not sampled.
DOI: 10.1594/pangaea.929107
title: Grain size classes of the dust fraction of sediment core PS75/056-1
title: Grain sizes analysed with laser particle sizer Beckmann Coulter LS13 320 at NIOZ, The Netherlands. The name of the samples includes the sample depth (e.g. 007-008 = 0.07-0.08 m core depth).
DOI: 10.1594/pangaea.928943
title: Optical water quality variables (Secchi disk depth and Forel-Ule colour indexes) observed during cruise M148/2 aboard RV METEOR

description: Optical water quality variables were recorded using a black and white Secchi disk with a diameter of 40 cm and a Forel-Ule colour scale. The Secchi disk depth was recorded as a relative measure of water clarity at each in situ station. At half the Secchi disk depth the apparent colour of the water above the submerged Secchi disk was determined using the Forel-Ule colour scale. A Forel-Ule colour scale is a classic tools used to differentiate the percieved color of water based on a scale from 1 (indigo blue) to 21 (cola brown). The measurements were conducted as proposed in literature (Garaba and Zielinski, 2015; Wernand, 2011; Wernand and van der Woerd, 2010).
description: We would like to thank RV Captain Detlef Korte and crew for supporting our research activities aboard RV METEOR during cruise M148/2. We are grateful of all the shore-based technicians, administrative personnel and scientists involved in the cruise. The German Federal Ministry of Education and Research (BMBF), Meteor Leitstelle, German National Science Foundation (DFG), Max Planck Society contributed towards the organization and funding of Meteor Expedition M148/2 EreBUS: Processes Controlling Greenhouse Gas Emissions from the Benguela Upwelling System.
DOI: 10.1594/pangaea.929108
title: Grain size distribution of the dust fraction of ODP Site PS75/056-1
DOI: 10.1594/pangaea.929937
title: Dissolved copper and copper-binding organic ligands in deep-sea pore waters of the central equatorial Pacific Ocean

description: This data set presents dissolved copper (dCu) and copper-binding ligand (L) data for deep-sea pore waters in the Peru Basin, south east equatorial Pacific Ocean and the Clarion Clipperton Zone (CCZ) in the central equatorial Pacific Ocean. Samples were taken during cruises SO242, SO262, and SO268 using rhizons with a pore size of 0.12-0.18 µm. Several depths from one multicorer liner were pooled to get sufficient sample volume. dCu was determined by either ICP-MS analysis in kinetic energy discrimination mode or by competitive ligand equilibration–adsorptive stripping voltammetry (CLE-AdCSV). Cu speciation in the samples was also determined with CLE-AdCSV using salicylaldoxime (SA) as the added ligand. For each titration, the concentration of complexing ligands ([L]) and corresponding conditional stability constants (logK) were determined using the fitting software named ProMCC. The free copper ion (Cu2+) and bioavailable Cu' (Cu2+ + inorganic copper) were also calculated. Data was fitted using both the one-ligand and two-ligand complete complexation-fitting model. The model with the best fit and thus the least fitting error was used for data interpretation - this was always the one-ligand model. Side reaction coefficients and stability constants of SA of each sample were provided by van den Berg's ion-pairing model for seawater (EXCEL worksheet - ion-pairing model for seawater, written by C.M.G. van den Berg in 2014) using sample specific salinity values measured in the lab, a SA concentration of 5 µM, an ambient temperature of 21˚C, and a pH of 8.1.
DOI: 10.1594/pangaea.929959
title: Stable isotopes of Uvigerina spp. from sediment core M78/1_235-1

description: Stable carbon (δ13C) and oxygen isotope (δ18O) were performed on the benthic foraminiferal species Uvigerina spp. The foraminiferal specimens were selected from piston core M78/1-235-1, which was recovered from Tobago Basin (11°36.53'N 60°57.86'W) from 852 m water depth during R/V Meteor Cruise 78/1. Sampling and analytical studies were carried out from 412.5 to 800 cm core depth at 2-4 cm spatial resolution. This dataset extends the existing benthic proxy records (Poggemann et al., 2017; doi:10.1029/2018PA003376) further back in time, now focusing on the glacial time period and the latest fully developed D/O events (~22.7-37 ka BP). The isotope analyses were performed in 2017 and 2019 on a Thermo Scientific MAT 253 mass spectrometer with an automated Kiel IV Carbonate Preparation Device. The proxy data provide stratigraphical information on the Tobago Basin core M78/1-235-1.
DOI: 10.1594/pangaea.929961
title: Age and sediment reflectance of sediment core M78/1_235-1

description: This dataset provides depth, age, and sediment reflectance data of piston core M78/1-235-1, which was recovered from Tobago Basin (11°36.53'N 60°57.86'W) from 852 m water depth. A MINOLTA CM-508d hand-held spectrophotometer was used during R/V Meteor Cruise 78/1 to measure the light reflectance (L*) of the sediment. The spectral reflectance is measured over a wavelength spectrum from 400 to 700 nm at a 10 nm pitch. Routine measurements were made at 1 cm intervals and automatically recorded using the SPECTRAMAGIC® v.2.11 software. The L*- dataset without age information is archived at doi:10.1594/PANGAEA.788740 (Bahr et al., 2012). The L* data provide stratigraphical information, and information on fluvial supply of terrigenous matter to the core location.
DOI: 10.1594/pangaea.928953
title: Snow thickness measurements at ice station PS118_20190222_1 during POLARSTERN cruise PS118

description: Snow depth measurements were obtained using a MagnaProbe (Snow-Hydro, Fairbanks, Alaska, USA) during walking surveys on most ice stations during PS118. The walks were randomly done on the entire floe. The MagnaProbe measurements were accompanied by measurements of the total sea-ice thickness with a ground-based multifrequency electromagnetic induction instrument (GEM-2) along the same transect.
DOI: 10.1594/pangaea.930807
title: δD on lipid plant waxes of sediment core M125-67-4
DOI: 10.1594/pangaea.930809
title: Mineralogical composition of sediment core M125-67-4
DOI: 10.1594/pangaea.930810
title: Elemental composition of sediment core M125-67-4
DOI: 10.1594/pangaea.929450
title: Dissolved copper in deep-sea pore waters from multi corer SO262_26-1, central equatorial Pacific Ocean

description: Samples for dissolved (&lt;0.2 µm) copper (Cu) in deep-sea pore waters from the Clarion Clipperton Zone, eastern German license area for polymetallic nodule mining in the Pacific Ocean, were collected with a multicorer in 2018 during cruise SO262. Samples were obtained at 2 cm intervals for the upper 20 cm of sediment through centrifugation and filtration through 0.2 µm polycarbonate syringe filters for trace metal analyses. The goal of this was to assess trace metal concentrations in pore waters and spatial heterogeneity. Samples were analyzed in 2019 by quadrupole ICP-MS in kinetic energy discrimination (KED) mode.
DOI: 10.15468/dl.wdzgcu
title: Occurrence Download

description: A dataset containing 85 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Mulloidichthys auriflamma (Forsskål, 1775)"
 ]
}

 The dataset includes 85 records from 22 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001355-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.929453
title: Dissolved copper in deep-sea pore waters from multi corer SO262_63-1, central equatorial Pacific Ocean

description: Samples for dissolved (&lt;0.2 µm) copper (Cu) in deep-sea pore waters from the Clarion Clipperton Zone, eastern German license area for polymetallic nodule mining in the Pacific Ocean, were collected with a multicorer in 2018 during cruise SO262. Samples were obtained at 2 cm intervals for the upper 20 cm of sediment through centrifugation and filtration through 0.2 µm polycarbonate syringe filters for trace metal analyses. The goal of this was to assess trace metal concentrations in pore waters and spatial heterogeneity. Samples were analyzed in 2019 by quadrupole ICP-MS in kinetic energy discrimination (KED) mode.
DOI: 10.1594/pangaea.929454
title: Dissolved copper in deep-sea pore waters from multi corer SO262_149-1, central equatorial Pacific Ocean

description: Samples for dissolved (&lt;0.2 µm) copper (Cu) in deep-sea pore waters from the Clarion Clipperton Zone, eastern German license area for polymetallic nodule mining in the Pacific Ocean, were collected with a multicorer in 2018 during cruise SO262. Samples were obtained at 2 cm intervals for the upper 20 cm of sediment through centrifugation and filtration through 0.2 µm polycarbonate syringe filters for trace metal analyses. The goal of this was to assess trace metal concentrations in pore waters and spatial heterogeneity. Samples were analyzed in 2019 by quadrupole ICP-MS in kinetic energy discrimination (KED) mode.
DOI: 10.1594/pangaea.930612
title: Geochemistry (Mg/Ca and stable oxygen isotopes) of Globigerinoides ruber (pink variety) of sediment core M125-35-3

description: This dataset includes stable oxygen isotope (δ¹⁸O ‰ V-SMOW) data and reconstructed Sea Surface Temperatures (SST) based on foraminiferal Mg/Ca measured on Globigerenoides ruber (pink variety) covering the last deglacial period (20 to 10 ka). Raw Mg/Ca data were converted to SSTs using the species-specific calibration provided by Dekens et al. (2002; doi:10.1029/2001GC000200). Combined stable oxygen isotope data and Mg/Ca based SSTs were used to calculate ice-volume free seawater (δ¹⁸Oivf-sw). Foraminiferal species G. ruber (p) were sampled from sediment Gravity Core M125-35-3 retrieved during research cruise M125 (RV METEOR) in 2016. Core M125-35-3 is located off south western Brazil in the tropical western South Atlantic in the pathway of the tropical warm southward-flowing Brazil Current.
DOI: 10.1594/pangaea.930105
title: Hydrogen uptake activities of metagenomic fosmid clones derived from hydrothermal vent systems along the Mid-Atlantic Ridge during METEOR cruise M78/2

description: Metagenomic fosmid libraries were constructed from hydrothermal chimneys and fluids and screened for hydrogen uptake (hydrogenase) activity by means of an activity-based screen. The hydrogen uptake activity of positively screened clones was determined by means of a spectrophotometric assay and the DNA-sequences of the respective fosmid inserts were determined by PacBio Sequencing. The dataset contain hydrogen-uptake activities of fosmid clones from the Sisters Peak, Nibelungen and Lilliput hydrothermal vent fields.
description: Metagenomic fosmid libraries were constructed from the environmental sample and screened for hydrogen uptake activity. The hydrogen upake activity of the fosmid clones has been determined as described in the cited publication.
DOI: 10.1594/pangaea.930674
title: Stable isotope record of benthic foraminifera of sediment core M125-73-3
DOI: 10.1594/pangaea.931015
title: Measuring of Dissolved Inorganic Carbon (DIC) with Automated Infra-Red Inorganic Carbon Analyzer (AIRICA)

description: Dissolved Inorganic Carbon (DIC) is one of four parameters measured in order to determine the marine carbonate system. The AIRICA system (Serial No. #027, Marianda, Tulpenweg 28, D-24145 Kiel) works by acidifying (2 acid strokes of 10 % phosphoric acid) a discrete sample amount (2100 µL), generating CO2. The carbon is released out of the water with the help of a carrier gas (99,999 % Nitrogen) that streams through the acidified probe (180 ml min-1). The gas flows through a NAFION dryer and Peltier cooler in order to dry the gas stream. The AIRICA system measures the CO2 concentration by using an infrared detector LICOR 7000 (LI-COR Environmental – GmbH, Siemensstrasse 25A, 61352 Bad Homburg, Germany). Once in the LICOR detector, the CO2 generates a peak, whose area is directly proportional the carbon released, allowing DIC concentration to be calculated when the exact amount of the sample is known. With the help of certified reference materials (Reference material for CO2 measurements, University of California, San Diego, Scripps Institution of Oceanography, Marine Physical Laboratory, 9500 Gilman Drive, La Jolla), previously unnoticed blank impurities can be fixed, leading to more precise measurements and more valuable data. A precision of 1.5-2 µmol kg-1 can be reached. In addition, an average of three repeated measurements is determined, with a maximum deviation of 3 µmol kg-1.
DOI: 10.1594/pangaea.930675
title: Color reflectance of sediment core M125-73-3
DOI: 10.1594/pangaea.930676
title: Element analysis of sediment core M125-73-3
DOI: 10.1594/pangaea.930683
title: Lipid biomarker of sediment core M125-73-3
DOI: 10.1594/pangaea.932458
title: Whale sightings during POLARSTERN cruise PS97 (ANT-XXXI/3)

description: Data on whale distribution and abundance in the polar oceans is rather sparse, as implementing the standard surveying method, line-transect surveys, is challenging and costly. To overcome this problem, we initiated a program to electronically log all opportunistic cetacean sightings during all Polarstern expeditions through the nautical officer on watch. Opportunistic (visual) sightings by naked eye were logged during Polarstern Cruise PS97 (Punta Arenas – Punta Arenas) by the nautical officer on duty using a customized Software package (WALOG, WhAleLOGger) installed on a touch screen laptop located on the ship's bridge. Species were identified by naked eye or handheld binoculars (7x50) to the lowest possible taxonomical level and assigned a “certainty” level of identification. The number of animals were counted if possible or estimated for larger groups. Whenever identification to species level was not possible, the next identifiable taxonomical category was assigned. Information on sighting position, date and time are automatically transferred from the ship's DAVIS-Ship System (https://dship.awi.de/) to the WALOG software at the time of logging. Photographs were taken if possible for retrospective analysis. All data of acquired sightings were retrospectively validated by a marine biologist and converted to a standard format. To this end, plausibility of sighting time, location, standardization of species names, eventual comments added at the time of sighting, as well as additional information such as photographs (if available) were checked either to verify or improve species identification. The large number of unidentified sightings during this cruise resulted from sightings at great distances. Datasets are used in species distribution modelling and to inform interested parties about occurrences.
description: Date/Time is given in UTC. Certainty of identification: definite if observer clearly identified the species. The number of individuals is binned according to the options given in the data acquisition software: 1, 2, 3, less equal 5, less equal 10, greater than 10, greater than 20. More precise values may exist, due to observer comments.
DOI: 10.15468/dl.sxnyyy
title: Occurrence Download

description: A dataset listing the 33040 species recorded in GBIF matching the query:
{
 "and" : [
 "Country is Namibia",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present"
 ]
}

 The dataset's 33040 records were derived from 972 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001332-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.931390
title: Physical oceanography from mooring KPO_1098 (corrected version)

description: GEOMAR moorings are typically equipped with instruments recording pressure, temperature, conductivity, dissolved oxygen and current velocity. Instruments with pressure, temperature, conductivity and oxygen sensors were calibrated in situ immediately prior to and after a mooring deployment period by attaching them to the CTD frame during CTDO casts. Correction terms were then developed from the difference between the sensor readings and the calibrated CTDO data during several minute long calibration stops. These correction terms were then applied to the full deployment periods. This ensured best data quality with recognition of potential sensor drifts and also allowed for the estimation of calibration and measurement errors (Hahn et al. 2014, Bittig et al. 2018, Berx et al. 2019).
description: instrument = Label:kpo_1098_01 File:kpo_1098_instr_01.nc Type:Teledyne RDI Narrowband 150 SN:00589instrument = Label:kpo_1098_02 File:kpo_1098_instr_02.nc Type:GEOMAR TD-Logger SN:47instrument = Label:kpo_1098_03 File:kpo_1098_instr_03.nc Type:Seabird MicroCat 37-SM SN:01286 depth/pressure data was at least partially derived and not directly measured, consult quality flags for detailsinstrument = Label:kpo_1098_04 File:kpo_1098_instr_04.nc Type:Aanderaa RCM 11 SN:00477 depth/pressure data was at least partially derived and not directly measured, consult quality flags for detailsinstrument = Label:kpo_1098_05 File:kpo_1098_instr_05.nc Type:Aanderaa RCM 8 SN:08365 depth/pressure data was at least partially derived and not directly measured, consult quality flags for detailsinstrument = Label:kpo_1098_06 File:kpo_1098_instr_06.nc Type:Seabird MicroCat 37-SM mit P SN:10610instrument = Label:kpo_1098_07 File:kpo_1098_instr_07.nc Type:Aanderaa RCM 8 SN:10554 depth/pressure data was at least partially derived and not directly measured, consult quality flags for detailsinstrument = Label:kpo_1098_08 File:kpo_1098_instr_08.nc Type:Aanderaa RCM 8 SN:10776 depth/pressure data was at least partially derived and not directly measured, consult quality flags for detailsinstrument = Label:kpo_1098_09 File:kpo_1098_instr_09.nc Type:Seabird MicroCat 37-SM SN:00055 depth/pressure data was at least partially derived and not directly measured, consult quality flags for detailscomment = flag_meaningscomment = 0:unknowncomment = 1:good_datacomment = 2:probably_good_datacomment = 3:potentially_correctable_bad_datacomment = 4:bad_datacomment = 5:not_usedcomment = 6:not_usedcomment = 7:nominal_valuecomment = 8:interpolated_valuecomment = 9:missing_value
DOI: 10.1594/pangaea.932506
title: Processed hourly current meter data from Mooring EB1/3 2018-2019

description: This data set contains current meter measurement data from deep-sea mooring EB1/3 deployed in the North Atlantic Eastern Boundary (EB) region at Goban Spur from April 2018 to May 2019. The mooring is part of an array that represents the eastern extension of the basin-wide "North Atlantic Changes" (NOAC) ocean observatory deployed along 47°N. Data were interpolated on a regular hourly time grid.
DOI: 10.1594/pangaea.932510
title: Processed hourly current meter data from Mooring EB3/3 2018-2019

description: This data set contains current meter measurement data from deep-sea mooring EB3/3 deployed in the North Atlantic Eastern Boundary (EB) region at Goban Spur from April 2018 to May 2019. The mooring is part of an array that represents the eastern extension of the basin-wide "North Atlantic Changes" (NOAC) ocean observatory deployed along 47°N. Data were interpolated on a regular hourly time grid.
DOI: 10.1594/pangaea.931965
title: Stable carbon isotope ratios of Cibicidoides wuellerstorfi of sediment core PS75/104-1

description: Here we show the downcore LGM to Holocene carbonate system of intermediate water sediment record PS75/104-1 offshore New Zealand. We measured foraminiferal B/Ca ratios via laser ablation-inductively coupled-mass spectrometry (LA-ICP-MS) and used the calibration of Yu et al. (2013) for Cibicidoides wuellerstorfi and Ronge et al. (under review) for C. dispars. Measurements were conducted at the GEOMAR in Kiel in 2013.
DOI: 10.1594/pangaea.933039
title: Clay mineral composition of sediment core PS97/085-3