cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.945773
title: Magnetic susceptibility of ODP Site 154-927, Pliocene Warm Period (3095 to 3307 ka) interval

description: Magnetic susceptibility record of the individual core sections from Wilkens et al., (2017, DOI: 10.5194/cp-13-779-2017) along the adjusted composite splice from this study and singular spectrum analyses (SSA, Analyseries software, Paillard et al., 1996, DOI: 10.1029/96EO00259) of this magnetic susceptibility record along adjusted composite splice from this study, with the ages from previously published age model (Wilkens et al., 2017, DOI: 10.5194/cp-13-779-2017) and revised ages (age model described in this study). This is for the interval from 105.775 mcd (adjusted, this study) to 128.895 mcd (adjusted, this study), corresponding to the time interval from 3095 ka (adjusted, this study) to 3307 ka (adjusted, this study).
DOI: 10.1594/pangaea.861674
title: Oxygen isotopes measured along snow Trench 2 from Kohnen Station, Dronning Maud Land, Antarctica
DOI: 10.1594/pangaea.945812
title: Oxygen and carbon stable isotopes ratios from benthic foraminifera from Miocene Climatic Optimum (MCO) (15589 to 15964 ka) time interval, ODP Hole 154-927A, Ceara Rise, tropical Atlantic Ocean

description: Stable oxygen and carbon isotope ratios measured on benthic foraminifera (Cibicidoides mundulus, Cibicidoides wuellerstorfi and Oridorsalis umbonatus) from the Miocene time interval from 15589 to 15964 ka at Leg 154 Site 927, Ceara Rise, tropical Atlantic. The sediment samples were washed and sieved at 63 µm and dry-sieved at 150 µm for benthic foraminifera picking. We performed stable isotope analyses (ẟ18O and ẟ13C) at Bremen university, using a ThermoFisher Scientific MAT 253plus gas isotope ratio mass spectrometer with a Kiel IV automated carbonate preparation device. This gives ẟ18O values with a standard deviation of house standard (Solnhofen limestone) over measurement period of 0.07 ‰ and ẟ13C values with standard deviation of house standard (Solnhofen limestone) over measurement period of 0.03 ‰. The number of specimens used for each measurement is specified. For the species-specific ẟ18O and ẟ13C values correction, we used the calibration given in the supplement table S3 from Westerhold et al. (2020, DOI: 10.1126/science.aba6853), and the average is calculated from the corrected values. The composite depths and age model presented are from this study.
DOI: 10.1594/pangaea.198640
title: Geometry of coccolith Gephyrocapsa in sediment core K708-007

description: measured on Gephyrocapsa spp.
DOI: 10.1594/pangaea.876637
title: Stable water isotopes measured along snow Trench T15-1 from Kohnen Station, Dronning Maud Land, Antarctica
DOI: 10.1594/pangaea.861673
title: Oxygen isotopes measured along snow Trench 1 from Kohnen Station, Dronning Maud Land, Antarctica
DOI: 10.1594/pangaea.382311
title: Radiosonde PS45/16236 during POLARSTERN cruise ARK-XIII/3 on 1997-08-21 09:58h

description: Height of tropopause 9607 m, precipitable water content 0.6396 cm
DOI: 10.15468/dl.xyqqn5
title: Occurrence Download

description: A dataset containing 114 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Africa",
 "TaxonKey is Heterochromis multidens (Pellegrin, 1900)"
 ]
}

 The dataset includes 114 records from 12 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000204-250123221155621/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.783559
title: (Fig. 4) Decarbonated grain size composition of sediment core GeoB11035-1
DOI: 10.1594/pangaea.736663
title: (Table 2) Mean coccolith lengths and corresponding coccolith carbonate masses for selected species of sediment core GeoB3603-1
DOI: 10.1594/pangaea.381417
title: Radiosonde PS45/16261 during POLARSTERN cruise ARK-XIII/3 on 1997-09-10 10:03h

description: Height of tropopause 9635 m, precipitable water content 0.7111 cm
DOI: 10.1594/pangaea.921326
title: Surface sediment Florisphaera profunda and modern environmental variables dataset
DOI: 10.1594/pangaea.721107
title: Seawater carbonate chemistry, growth rate and processes during experiments with Coccolithus pelagicus and Calcidiscus leptoporus, 2006

description: Uptake of half of the fossil fuel CO2 into the ocean causes gradual seawater acidification. This has been shown to slow down calcification of major calcifying groups, such as corals, foraminifera, and coccolithophores. Here we show that two of the most productive marine calcifying species, the coccolithophores Coccolithus pelagicus and Calcidiscus leptoporus, do not follow the CO2-related calcification response previously found. In batch culture experiments, particulate inorganic carbon (PIC) of C. leptoporus changes with increasing CO2 concentration in a nonlinear relationship. A PIC optimum curve is obtained, with a maximum value at present-day surface ocean pCO2 levels (?360 ppm CO2). With particulate organic carbon (POC) remaining constant over the range of CO2 concentrations, the PIC/POC ratio also shows an optimum curve. In the C. pelagicus cultures, neither PIC nor POC changes significantly over the CO2 range tested, yielding a stable PIC/POC ratio. Since growth rate in both species did not change with pCO2, POC and PIC production show the same pattern as POC and PIC. The two investigated species respond differently to changes in the seawater carbonate chemistry, highlighting the need to consider species-specific effects when evaluating whole ecosystem responses. Changes of calcification rate (PIC production) were highly correlated to changes in coccolith morphology. Since our experimental results suggest altered coccolith morphology (at least in the case of C. leptoporus) in the geological past, coccoliths originating from sedimentary records of periods with different CO2 levels were analyzed. Analysis of sediment samples was performed on six cores obtained from locations well above the lysocline and covering a range of latitudes throughout the Atlantic Ocean. Scanning electron micrograph analysis of coccolith morphologies did not reveal any evidence for significant numbers of incomplete or malformed coccoliths of C. pelagicus and C. leptoporus in last glacial maximum and Holocene sediments. The discrepancy between experimental and geological results might be explained by adaptation to changing carbonate chemistry.
description: Supplement to: Langer, Gerald; Geisen, Markus; Baumann, Karl-Heinz; Kläs, Jessica; Riebesell, Ulf; Thoms, Silke; Young, Jeremy (2006): Species-specific responses of calcifying algae to changing seawater carbonate chemistry. Geochemistry, Geophysics, Geosystems, 7, Q09006
DOI: 10.1594/pangaea.884329
title: Grain size data from ODP Site 162-982

description: Records of grain size data measured on the coarse fraction of sediment samples taken during Ocean Drilling Program Site 982 from the Rockall Plateau. For the studies of the coarse fraction the samples were freeze-dried using a FINN-AQUA (lyvotac GT2). Part of the freeze-dried sample was weighed and then washed on a 63-µm sieve and further separated into 63- to 125-, 125- to 500-, 500- to 1000-, and &gt;1000-µm fractions using an ATM-SONIC-Sifter. The 125- to 500-µm fraction was chosen for particle count procedure.
description: Supplement to: Baumann, Karl-Heinz; Huber, Robert (1999): Sea-surface gradients between the North Atlantic and the Norwegian Sea during the last 3.1 m.y.: comparison of Sites 982 and 985. In: Raymo, M.E.; Jansen, E.; Blum, P.; Herbert, T.D. (eds.), Proceedings of the Ocean Drilling Program, 162 Scientific Results, Proceedings of the Ocean Drilling Program, 162, Ocean Drilling Program, Proceedings of the Ocean Drilling Program Scientific Results, 162, 179-190
DOI: 10.1594/pangaea.186448
title: Sedimentology on core PS1113-1
DOI: 10.1594/pangaea.68904
title: Sediment components of core L008/23

description: Ages corrected for an ocean reservoir age of 400 14C yr
DOI: 10.1594/pangaea.932788
title: Airborne low-altitude snow depth on sea ice during aircraft flight P6_217_ICEBIRD_2019_1904101401, Version 1

description: Airborne observations of snow depth on sea ice were made in April 2019 during the winter campaign of the AWI IceBird campaign series. The data consist of five surveys, some with overlapping segments at low and high altitude, spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort Sea. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters for low-altitude flights and 7-9 meters for high-altitude flights. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data in the low-altitude data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m at low altitude and 7.2/5.1 m at the high altitude.
DOI: 10.1594/pangaea.736664
title: (Table 2) Mean coccolith lengths and corresponding coccolith carbonate masses for selected species of sediment core GeoB3725-1
DOI: 10.1594/pangaea.186462
title: Geometry of coccolith Coccolithus pelagicus in sediment core GIK23071-2

description: measured on Coccolithus pelagicus
DOI: 10.1594/pangaea.382318
title: Radiosonde PS45/16243 during POLARSTERN cruise ARK-XIII/3 on 1997-08-28 10:01h

description: Height of tropopause 9782 m, precipitable water content 0.6755 cm
DOI: 10.1594/pangaea.186460
title: Geometry of coccolith Coccolithus pelagicus in sediment core GIK23062-4
DOI: 10.1594/pangaea.890336
title: Neogloboquadrina pachyderma analysis from IODP Hole 306-U1313D
DOI: 10.1594/pangaea.890341
title: Calcium carbonate analysis from IODP Hole 306-U1313D
DOI: 10.1594/pangaea.890338
title: Strontium/Calcium ratio of Coccolith fractions from IODP Hole 306-U1313D
DOI: 10.1594/pangaea.932665
title: Airborne low-altitude snow depth on sea ice during aircraft flight P5_205_PAMARCMIP_2017_1704061801, Version 1

description: Airborne observations of snow depth on sea ice were made in March and April 2017 as part of the Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project (PAMARCMIP) under the AWI IceBird campaign series. The data consist of six surveys spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort and Chukchi Seas. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m.
DOI: 10.1594/pangaea.932787
title: Airborne low-altitude snow depth on sea ice during aircraft flight P6_217_ICEBIRD_2019_1904081301, Version 1

description: Airborne observations of snow depth on sea ice were made in April 2019 during the winter campaign of the AWI IceBird campaign series. The data consist of five surveys, some with overlapping segments at low and high altitude, spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort Sea. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters for low-altitude flights and 7-9 meters for high-altitude flights. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data in the low-altitude data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m at low altitude and 7.2/5.1 m at the high altitude.
DOI: 10.1594/pangaea.932780
title: Airborne high-altitude snow depth on sea ice during aircraft flight P6_217_ICEBIRD_2019_1904020901, Version 1

description: Airborne observations of snow depth on sea ice were made in April 2019 during the winter campaign of the AWI IceBird campaign series. The data consist of five surveys, some with overlapping segments at low and high altitude, spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort Sea. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters for low-altitude flights and 7-9 meters for high-altitude flights. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data in the low-altitude data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m at low altitude and 7.2/5.1 m at the high altitude.
DOI: 10.1594/pangaea.932667
title: Airborne low-altitude snow depth on sea ice during aircraft flight P5_205_PAMARCMIP_2017_1704102101, Version 1

description: Airborne observations of snow depth on sea ice were made in March and April 2017 as part of the Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project (PAMARCMIP) under the AWI IceBird campaign series. The data consist of six surveys spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort and Chukchi Seas. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m.
DOI: 10.1594/pangaea.921928
title: 100m-scale isotopic (δ18O) variability of the top-meter at location B52, East Antarctica

description: Small-scale (100 meter) isotopic composition of the top-meter of the snowpack around Kohnen station, Droning-Maud Land, East-Antarctica. The snow was sampled with the dual-tube sampling technique and the isotopic analysis were realized by CRDS (Cavity-Ring-Down Spectroscopy, l2130-i, Picarro Inc.) at the Alfred-Wegener-Institut Helmholtz-Zentrum für Polar-und Meeresforschung, in Bremerhaven, Germany.
DOI: 10.1594/pangaea.932702
title: Airborne high-altitude snow depth on sea ice during aircraft flight P6_211_RESURV79_2018_1804100301, Version 1

description: Airborne observations of snow depth on sea ice were made in April 2018 as part of the RESURV79 (Re-survey of the 79° Glacier) campaign under the AWI IceBird campaign series. The data consist of one survey spanning sea-ice covered area in the Fram Strait. For the flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 7-9 meters. The trajectory data contain the full and unfiltered data record with quality flags. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 7.2/13.0 m.
DOI: 10.1594/pangaea.878111
title: (S1) Abundance of coccolithophore taxa/groups in sediment core PS75/076-2
DOI: 10.1594/pangaea.875174
title: Estimated primary productivity and F. profunda index records of sediment core GeoB12613-1 from the western Indian Ocean (off Tanzania)
DOI: 10.1594/pangaea.932662
title: Airborne low-altitude snow depth on sea ice during aircraft flight P5_205_PAMARCMIP_2017_1703301101, Version 1

description: Airborne observations of snow depth on sea ice were made in March and April 2017 as part of the Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project (PAMARCMIP) under the AWI IceBird campaign series. The data consist of six surveys spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort and Chukchi Seas. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m.
DOI: 10.1594/pangaea.932786
title: Airborne low-altitude snow depth on sea ice during aircraft flight P6_217_ICEBIRD_2019_1904071201, Version 1

description: Airborne observations of snow depth on sea ice were made in April 2019 during the winter campaign of the AWI IceBird campaign series. The data consist of five surveys, some with overlapping segments at low and high altitude, spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort Sea. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters for low-altitude flights and 7-9 meters for high-altitude flights. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data in the low-altitude data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m at low altitude and 7.2/5.1 m at the high altitude.
DOI: 10.1594/pangaea.932666
title: Airborne low-altitude snow depth on sea ice during aircraft flight P5_205_PAMARCMIP_2017_1704082001, Version 1

description: Airborne observations of snow depth on sea ice were made in March and April 2017 as part of the Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project (PAMARCMIP) under the AWI IceBird campaign series. The data consist of six surveys spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort and Chukchi Seas. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m.
DOI: 10.1594/pangaea.942061
title: Turbidity data measured by mooring deployment during RV SONNE cruise SO268/2 in the German license area, CCZ, NE Pacific Ocean

description: Expedition SO268 was part of the JPI Oceans project MiningImpact to assess the environmental impacts of deep sea mining of polymetallic nodules in the Clarion Clipperton Zone (CCZ). During this expedition, BGR deployed two moorings which were additionally equipped with two NIOZ optical backscatter sensors.
description: Converted, Depth is missing; Sensor was at 2.5 mab
DOI: 10.1594/pangaea.867495
title: Late Holocene coccolith assemblage data of sediment core GeoB8323-2 from the Benguela Upwelling System

description: Coccolith occurrences in sediment core GeoB 8323-2, from the Benguela Upwelling System off south-western Africa, were analysed to reconstruct the temporal changes in surface water conditions, upwelling intensity and associated productivity during the late Holocene (last 2.25ka BP). Absolute numbers of total coccolithophores are low throughout the core, reaching a maximum of 320 x 10^6 coccoliths/gram sediment around 770 years BP. Despite the low abundance of coccoliths, coherent patterns of a changing assemblage composition can be identified. These suggest a consistent paleoceanographic development of highly variable Late Holocene environmental change during the last three millennia. Phases of decreased upwelling in the Benguela Upwelling System are indicated by elevated abundances of Florisphaera profunda alongside reduced occurrence of Coccolithus pelagicus and C. braarudii from 2.25-2.00ka BP, ~ 1.00ka BP and during the last 200 years, also accompanied by a reduced species diversity. Sea surface temperatures estimated with a Gephyrocapsa-based transfer function are in the order of 18-20°C. These phases are intersected by periods of colder sea surface temperatures of 16-17°C and increased productivity, as indicated by an opposing trend for the aforementioned species. Given the climatological and oceanographical complexity of the area, deciphering a single driving mechanism for these changes proves difficult. Synchronous changes in the Antarctic sea ice extent, however, give credit to the conceptual model of latitudinal migration of the westerly wind belt and its interaction with the south-easterly trade winds as an important driver for oceanographic changes in the area.
description: Supplement to: Weiser, Jens; Baumann, Karl-Heinz; Hahn, Annette; Zabel, Matthias (2016): Late Holocene paleoceanographic changes off south-western Africa as inferred from coccolithophore assemblages, Proc. 15th INA Conf., Bohol, Philippines. Journal of Nannoplankton Research, 36(2), 161-171
DOI: 10.15468/dl.tnz89j
title: Occurrence Download

description: A dataset containing 145 species occurrences available in GBIF matching the query:
{
 "and" : [
 "OccurrenceStatus is Present",
 "TaxonKey is Camellia pitardii var. cryptoneura (Hung T.Chang) T.L.Ming"
 ]
}

 The dataset includes 145 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000206-250123221155621/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.943329
title: Turbidity data measured during a plume monitoring experiment during RV SONNE cruise SO268/2 in the Belgian license area, CCZ, NE Pacific Ocean

description: Expedition SO268 was part of the JPI Oceans project MiningImpact to assess the environmental impacts of deep sea mining of polymetallic nodules in the Clarion Clipperton Zone (CCZ). A sediment plume monitoring operation was conducted as part of this expedition. During the expedition, a small experiment was carried out to study monitoring of sediment plumes using a multibeam system. This dataset contains the data of a JFE optical backscatter sensor (JFE OBS (NIOZ_ENV-17)) which was simultaneously deployed during SO268/2_ST152_ROV22.
description: converted
DOI: 10.1594/pangaea.382309
title: Radiosonde PS45/16234 during POLARSTERN cruise ARK-XIII/3 on 1997-08-19 10:01h

description: Height of tropopause 9710 m, precipitable water content 0.8463 cm
DOI: 10.1594/pangaea.382306
title: Radiosonde PS45/16231 during POLARSTERN cruise ARK-XIII/3 on 1997-08-17 03:24h

description: Height of tropopause 10038 m, precipitable water content 1.0319 cm
DOI: 10.1594/pangaea.382310
title: Radiosonde PS45/16235 during POLARSTERN cruise ARK-XIII/3 on 1997-08-20 09:58h

description: Height of tropopause 9251 m, precipitable water content 0.7206 cm