cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.821988
title: (Table 1) Age determination of sediment core MD02-2515

description: Iron is considered to play a large role in the cycling of Si in Fe-limited regions of the ocean, but little is known about its role in Si biogeochemistry outside these areas. Here, we present published sediment trap data, new nutrient profiles and high resolution sedimentary records (Si isotopes, Biogenic silica%, N% and C%) from the Gulf of California, a non-Fe-limited region, to investigate the history of Si cycling in this highly productive basin. Modern nutrient profiles show that silicic acid in subsurface waters is in excess relative to nitrate and is therefore incompletely utilized during moderate winter upwelling events. Modern data, however, suggest that during intense upwelling episodes, silicic acid is preferentially utilized relative to nitrate by the biota, which we suggest reflects transient iron limitation. Our new d30Si record from the Guaymas Basin shows dramatic variations at millennial timescales. Low δ30Si values synchronous with Heinrich events are interpreted as resulting from the decline in Si(OH)4 utilization at times of decreased upwelling strength, while nearly complete Si(OH)4 utilization was observed at times of invigorated upwelling and increased opal burial during the Holocene, the Bølling-Allerød and the last glacial period. We attribute the complete utilization of Si(OH)4 to the occurrence of transient Fe limitation at these times. Our study highlights the importance of Fe limitation on Si and C cycling in coastal upwelling regions and suggests that upwelling dynamics, in combination with Fe availability, have the potential to modulate marine Si distribution and opal burial even at short timescales.
description: Ages 43.94 ka are tie points.
description: Supplement to: Pichevin, Laetitia; Ganeshram, Raja S; Reynolds, Ben C; Prahl, Frederick G; Pedersen, Thomas F; Thunell, Robert C; McClymont, Erin L (2012): Silicic acid biogeochemistry in the Gulf of California: Insights from sedimentary Si isotopes. Paleoceanography, 27(2), 319-333
DOI: 10.1594/pangaea.893856
title: Age determination of sediment core VIPI, Viitna Pikkjärv, Estonia

description: This dataset was archived on 2018-09-10 from the EPD database. (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.203899
title: (Table 2) 14C ages of samples from box and piston cores used to calculate accumulation rates for surface sediments, Southeast Atlantic
DOI: 10.1594/pangaea.954872
title: Age determination of beachrocks and hybrid carbonates deposited during the Holocene in southeastern Brazil

description: The data refer to the geochemical and isotopic characterization of sandstones, with carbonate cementation (beach rocks), and hybrid carbonates, formed by algal mats, in the shallow platform of the South Atlantic Ocean, Espírito Santo - Brazil. The determination of 14C activity was performed on 10 samples in Accelerator Mass Spectrometry Dating (AMS), University of California, Irvine (UCL). Sample preparation backgrounds have been subtracted based on measurements of 14C-free calcite. Radiocarbon concentrations were given as fractions of the modern standard, δ14C, and the conventional radiocarbon age followed the convention of Stuiver and Polach (1977). The 14C calibration was performed on the Radiocarbon Calibration Program* CALIB REV7.1.0, Copyright 1986-2018 (Stuiver and Reimer, 1993), with marine13.14C calibration dataset (Reimer et al., 2013). The concentrations of rare earth elements (REEs) and traces were obtained by ICP-MS (PerkinElmer Nexlon300D), after digestion according to the modified EPA Protocol 3052. The quality of data was checked by the analysis of standard reference material (PACS-2 National Research Council, Canada).
description: The study was carried out between 2017 and 2021 on the coast of Espírito Santo, specifically on the beach of Parati, municipality of Anchieta, in sandstones and hybrid carbonates, with the objective of analyzing the depositional dynamics throughout the Holocene. The occurrence of hybrid sandstones and carbonates in the intertidal zone is uncommon in the region, configuring an excellent proxy for the reconstitution of relative variations in sea level and paleoclimate.Radiocarbon concentrations are given as fractions of the Modern standard, D14C, and conventional radiocarbon age, following the conventions of Stuiver and Polach (Radiocarbon, v. 19, p.355, 1977). Sample preparation backgrounds have been subtracted, based on measurements of 14C-free calcite. All results have been corrected for isotopic fractionation according to the conventions of Stuiver and Polach (1977), with d13C values measured on prepared graphite using the AMS spectrometer. These can differ from d13C of the original material, and are not shown.These samples were leached 50% with dilute HCl prior to hydrolysis with 85% phosphoric acid. Duplicate samples of P1F118 gave significantly different results, as did carbonate cement and an embedded gastropod and bivalve from P2F418. d13C values shown above were measured to a precision of &lt;0.1‰ relative to standards traceable to PDB, using a Thermo Finnigan Delta Plus stable isotope ratio mass spectrometer (IRMS) with Gas Bench input. The initial P1F118 cement and P2F418B bivalve samples were too small to provide an additional CO2 aliquot for IRMS analysis.
DOI: 10.1594/pangaea.385642
title: Age determinations on sediment core PG1204
DOI: 10.1594/pangaea.921801
title: Radiocarbon measurements on tree rings of tree LYB-H40
DOI: 10.1594/pangaea.358845
title: (Table 2) Age determinations on sediment core PS2195-4
DOI: 10.1594/pangaea.833651
title: Radiocarbon datings on Globigerina bulloides of sediment core SO213/2_79-2
DOI: 10.1594/pangaea.669563
title: (Table 5) Luminescence-dating of sediment core PS2200-2 of the Arctic Ocean
DOI: 10.1594/pangaea.737630
title: (Table 2) Be isotope and Co concentrations for the four crusts
DOI: 10.1594/pangaea.357138
title: Paleoecological investigation of Hessische Senke at site Rau-4a
DOI: 10.1594/pangaea.762393
title: (Table 2) Age determination of sediment core PS2138-1
DOI: 10.1594/pangaea.821774
title: (Table 1) Core-top Neogloboquadrina pachyderma (s) B/Ca, Cd/Ca and d11B ratios
DOI: 10.1594/pangaea.812223
title: (Table 2) Radiocarbon dates of palsa and peat plateaus near the Herchmer and McClintock sites, Hudson Bay Lowlands

description: All ages in ka BP (1950). Ranges/Medians in descending order of probability.
DOI: 10.1594/pangaea.91162
title: Age determinations on sediment core PS2208-1
DOI: 10.1594/pangaea.964227
title: Age model of sediment core GeoTü SL167

description: The age model of sediment core GeoTü SL167 is based on 14C AMS measurements of planktonic foraminifera and is calibrated with the BACON v. 2.5.6 software for R (Blaauw & Christen, 2011) and a marine reservoir age of ΔR = 93 ± 61 years. The ΔR is based on the weighted mean of two regional marine reservoir corrections (Muscat) by Southon et al. (2002) using the marine calibration database (Reimer and Reimer, 2001, http://calib.org/marine/). Gravity core GeoTü SL167, was retrieved at station no. 960 during R.V. METEOR cruise M74/1b in 2007 (Bohrmann et al., 2010) from the northwestern Arabian Sea off Oman, at 22°37.2'N, 59°41.5'E, 774 m water depth, core recovery 7.39 m. The sediment core was retrieved for the reconstruction of circulation and productivity changes in the eastern Mediterranean Sea during the late Quaternary with particular focus on changes in the Indian monsoon system.
DOI: 10.1594/pangaea.357139
title: Paleoecological investigation of Hessische Senke at site Rau-5
DOI: 10.1594/pangaea.705458
title: (Table 3) Fission track age data for zircons from ignimbrites in Taupo Volcanic Zone

description: Age is fission track age, calculated using the zeta calibration method. Ignimbrites in Taupo Volcanic Zone (position is a mean of the Taupo Volcanic complex) are possible correlatives of Rangitawa Tephra
DOI: 10.1594/pangaea.106764
title: Age determinations of sediment core PG1238
DOI: 10.1594/pangaea.323500
title: Age determination of sediment core HN04S-160GC
DOI: 10.1594/pangaea.902101
title: (Table 1) Radiocarbon and calibrated ages of sediment cores GeoB16601-5 and MD05-2905

description: Mean calibrated ages were used to construct the age models. The online version of the program CALIB 7.1 was used, with access dates of 12 November 2016 (GeoB16601-5; samples 17-18 and 35-36) and 11 December 2017 (MD05-2905; all samples). The online version of the program CALIBomb was used for the GeoB16601-5 core top (0-1 cm), with access date of 28 January 2019. For core 16601-5: Radiocarbon concentrations are given as fractions of the modern standard, D14C, and conventional radiocarbon age, following the conventions of Stuiver and Polach (1977). Sample preparation backgrounds have been subtracted, based on measurements of 14C-free calcite. All results have been corrected for isotopic fractionation according to the conventions of Stuiver and Polach (1977), with d13C values measured on prepared graphite using the AMS spectrometer. These can differ from d13C of the original material, if fractionation occurred during sample graphitization or the AMS measurement, and are not shown.AMS- radiocarbon ages of core MD05-2905 were originally published by Yang et al. (2008; Frontiers of Earth Science in China 2: 170-176) and re-calibrated to improve the age model of this core.
DOI: 10.1594/pangaea.206170
title: Carbon isotope data in sediment core BOFS4C

description: Scottish Universities Environmental Research Centre. Authorship was originally taken from the JGOFS CDs (Lowry & BODC) and was changed by request of the BODC.
DOI: 10.1594/pangaea.54975
title: Radionuclides of sediment core GIK23059-3
DOI: 10.1594/pangaea.900471
title: Ras Umm Sidd annual winter δ¹⁸O data of coral core/colony RUS-95 as proxy for major Red Sea deep water renewals

description: The Red Sea is a deep marine basin often considered as small‐scale version of the global ocean. Hydrographic observations and ocean‐atmosphere modeling indicate Red Sea deep water was episodically renewed by wintertime open‐ocean deep convections during 1982-2001, suggesting a renewal time on the order of a decade. However, the long‐term pacing of Red Sea deep water renewals is largely uncertain. We use an annually resolved coral oxygen isotope record of winter surface water conditions to show that the late twentieth century deep water renewals were probably unusual in the context of the preceding ~100 years. More frequent major events are detected during the late Little Ice Age, particularly during the early nineteenth century characterized by large tropical volcanic eruptions. We conclude that Red Sea deep water renewal time is on the order of a decade up to a century, depending on the mean climatic conditions and large‐scale interannual climate forcing.
description: Supplement to: Felis, Thomas; Mudelsee, Manfred (2019): Pacing of Red Sea deep water renewal during the last centuries. Geophysical Research Letters, 46(8), 4413-4420
DOI: 10.5281/zenodo.15751843
title: Global Green Methanol Market 2025 To 2034

description: Green Methanol Market Size, Trends and Insights By Production Method (Biomass-based Methanol, Electrolysis-based Methanol (Green Methanol)), By Application (Transportation, Industrial, Power Generation), By End-User Industry (Shipping and Maritime, Automotive, Chemical and Petrochemical Industries), and By Region - Global Industry Overview, Statistical Data, Competitive Analysis, Share, Outlook, and Forecast 2025–2034.

Reports Description

As per the Green Methanol Market analysis conducted by the CMI Team, the global Green Methanol Market is expected to record a CAGR of 34.04% from 2025 to 2034. In 2025, the market size is projected to reach a valuation of USD 2.54 Billion. By 2034, the valuation is anticipated to reach USD 42.3 Billion.

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DOI: 10.5281/zenodo.15751844
title: Global Green Methanol Market 2025 To 2034

description: Green Methanol Market Size, Trends and Insights By Production Method (Biomass-based Methanol, Electrolysis-based Methanol (Green Methanol)), By Application (Transportation, Industrial, Power Generation), By End-User Industry (Shipping and Maritime, Automotive, Chemical and Petrochemical Industries), and By Region - Global Industry Overview, Statistical Data, Competitive Analysis, Share, Outlook, and Forecast 2025–2034.

Reports Description

As per the Green Methanol Market analysis conducted by the CMI Team, the global Green Methanol Market is expected to record a CAGR of 34.04% from 2025 to 2034. In 2025, the market size is projected to reach a valuation of USD 2.54 Billion. By 2034, the valuation is anticipated to reach USD 42.3 Billion.

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DOI: 10.1594/pangaea.803544
title: (Table 1) Age determination of glass-samples from ODP Hole 135-841B

description: Several samples from the rhyolitic lavas encountered in Hole 841 B in the Tonga Forearc were made available by A. Ewart for potassiumargon (K-Ar) dating in an attempt to constrain the age of the eruptions.The material was supplied in crushed form and consisted primarily of volcanic glass together with some microphenocrysts made up mainly of plagioclase and quartz. Plagioclase could not be separated in sufficient amount for dating, especially as the potassium content of the plagioclase was quite low (~0.055% K). Petrographic examination of the volcanic glass indicated that it was remarkably fresh: it was clear, unaltered, and essentially isotopic. Thus, it was decided to attempt to date the volcanic glass.
description: lambda e + lambda e' = 0.581 * 10**-10/a; lamda beta = 4.962 * 10**-10/a; 10K/K = 1.167 * 10**-4 mol/mol
description: Supplement to: McDougall, Ian (1994): Data report: Dating of rhyolitic glass in the Tonga forearc (Hole 841B). In: Hawkins, J; Parson, L; Allan, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 135, 923
DOI: 10.1594/pangaea.830645
title: (Table S1) Age determination of sediment cores of the Gulf of Alaska

description: Oxygen isotope data from planktonic and benthic foraminifera, on a high-resolution age model (44 14C dates spanning 17,400 years), document deglacial environmental change on the southeast Alaska margin (59°33.32'N, 144°9.21'W, 682 m water depth). Surface freshening (i.e., d18O reduction of 0.8 per mil) began at 16,650 ± 170 cal years B.P. during an interval of ice proximal sedimentation, likely due to freshwater input from melting glaciers. A sharp transition to laminated hemipelagic sediments constrains retreat of regional outlet glaciers onto land circa 14,790 ± 380 cal years B.P. Abrupt warming and/or freshening of the surface ocean (i.e., additional d18O reduction of 0.9 per mil) coincides with the Bølling Interstade of northern Europe and Greenland. Cooling and/or higher salinities returned during the Allerød interval, coincident with the Antarctic Cold Reversal, and continue until 11,740 ± 200 cal years B.P., when onset of warming coincides with the end of the Younger Dryas. An abrupt 1 per mil reduction in benthic d18O at 14,250 ± 290 cal years B.P. likely reflects a decrease in bottom water salinity driven by deep mixing of glacial meltwater, a regional megaflood event, or brine formation associated with sea ice. Two laminated opal-rich intervals record discrete episodes of high productivity during the last deglaciation. These events, precisely dated here at 14,790 ± 380 to 12,990 ± 190 cal years B.P. and 11,160 ± 130 to 10,750 ± 220 cal years B.P., likely correlate to similar features observed elsewhere on the margins of the North Pacific and are coeval with episodes of rapid sea level rise. Remobilization of iron from newly inundated continental shelves may have helped to fuel these episodes of elevated primary productivity and sedimentary anoxia.
description: Calendar years calculated from mean planktonic 14C ages for JC and TC samples and benthic 14C ages for MC samples, using CALIB v.6.0 [Stuiver and Reimer, 1993] with the Marine09 calibration curve. For planktonic samples (JC and TC) Delta R = 470 ± 80 years, and for benthic samples (MC) Delta R = 900 ± 100.
description: Supplement to: Davies, M H; Mix, Alan C; Stoner, Joseph S; Addison, Jason A; Jaeger, John; Finney, Bruce P; Wiest, Johannes (2011): The deglacial transition on the southeastern Alaska Margin: Meltwater input, sea level rise, marine productivity, and sedimentary anoxia. Paleoceanography, 26(2), PA2223
DOI: 10.1594/pangaea.871356
title: Table S35 - Calcareous Nannofossil Events ODP Site 207-1258

description: Note: & - this study, # - Sexton et al. 2011, B = Base, T = Top, Bc = Base common occurence, Tc = Top common occurence, Br = Base rare occurence, X=crossover.
DOI: 10.1594/pangaea.56587
title: (Table 2) Optical stimulated luminescence dates on fluvial sediments below the Markhida till at sites along the lower Pechora

description: OSL dates on quarts, using the sand grain fraction. All dates are performed at the Nordic Laboratory for Luminescence Dating, Risø
DOI: 10.1594/pangaea.806805
title: (Table 1) Radiocarbon dating of peat cores LVPS4 and LVPS5B
DOI: 10.1594/pangaea.56085
title: Table 2. Radiocarbon ages on shells and foraminifera from core 62
DOI: 10.1594/pangaea.902695
title: (Table S04) Radiocarbon ages from sediment core MD03-2705

description: For age dating methods, see references. Calendar ages were calculated from the published raw radiocarbon ages into calendar ages using using Oxcal (online version 4.3) (Ramsey, 2009), the IntCal13 calibration curve (Reimer et al., 2013) and the modern reservoir age corresponding to each location extracted from GLODAP (Key et al., 2004). The reservoir age considered is 470 ± 120 a.
DOI: 10.1594/pangaea.726727
title: Radiocarbon dating of sediment profile PG1111
DOI: 10.1594/pangaea.802150
title: (Table 1) Age determination of the last glacial section of sediment cores from Lago Calvarne Bog and Laguna Cascada

description: All ages in 1 sigma range.
DOI: 10.1594/pangaea.783411
title: (Table 1) Age model tie points of sediment cores GeoB11035-1, GeoB13071-1, and GeoB130206-1

description: 14C age at base of GeoB11035-1 (asterisk) is not considered because beyond radiocarbon limits. a Correlation with d18O record of GISPII. b Leibniz Laboratory, Kiel, Germany. c Poznan Radiocarbon Laboratory, Poland. d Correlation with GeoB11035-1 according to Fig. 3.
DOI: 10.1594/pangaea.896777
title: Age determination profile SHE III, Lough Sheeauns, Co. Galway
DOI: 10.1594/pangaea.186368
title: Radiocarbon age determinations on sediment core CH61-143
DOI: 10.1594/pangaea.186374
title: Radiocarbon age determinations on sediment core 72-021-6
DOI: 10.1594/pangaea.186375
title: Radiocarbon age determinations on sediment core 79K
DOI: 10.1594/pangaea.186380
title: Radiocarbon age determinations on sediment core ALB-166
DOI: 10.1594/pangaea.793169
title: (Table 1) Radiocarbon ages obtained from friable sediments of Hole AMIGE-1993-210
DOI: 10.1594/pangaea.186381
title: Radiocarbon age determinations on sediment core BB326-26
DOI: 10.1594/pangaea.771439
title: Age determination of sediment core CIROS-2

description: FAD/LAD depths are from: Winter, D M (1995) Upper neogene diatom biostratigraphy from coastal drillcores in Southern Victoria Land Antarctica. MSc thesis, University of Nebraska-Lincoln.FAD/LAD ages are from: Cody, R D; Levy, R H; Harwood, D M; Sadler, P M (2008) Thinking outside the zone: High-resolution quantitative diatom biochronology for the Antarctic Neogene. Palaeogeography, Palaeoclimatology, Palaeoecology, 260(1-2), 92-121, doi:10.1016/j.palaeo.2007.08.020.
DOI: 10.1594/pangaea.186281
title: Radiocarbon age determinations on sediment core V25-60
DOI: 10.1594/pangaea.186300
title: Radiocarbon age determinations on sediment core V30-51
DOI: 10.1594/pangaea.785493
title: 14C datings of sediment core HU91/039-012TC and HU91/039-012P from the northernmost Baffin Bay
DOI: 10.1594/pangaea.763713
title: Tab. 2: Age determinations in southern Kirwanveggen
DOI: 10.1594/pangaea.894102
title: Age determination of sediment core OTTMOR, Morttjern, Norway

description: This dataset was archived on 2018-09-14 from the EPD database. (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.756432
title: (Table 1) Radiocarbon ages of bottom sediments from the Red Sea
DOI: 10.1594/pangaea.786090
title: (Table 2) Radiocarbon datings and calendar year calibrations for the proxy records on the Norwegian-Barents Sea-Svalbard margin
DOI: 10.1594/pangaea.894174
title: Age determination of sediment core SETESI, Isbenttjønn, Norway

description: This dataset was archived on 2018-09-14 from the EPD database. (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.758814
title: Table 1. Radiocarbon age determinations from Lake Prespa core Co1204

description: Data also referenced in Table 1 (doi:10.1594/PANGAEA.804715), Wagner et al 2012 (doi:10.1016/j.quaint.2012.02.016).
DOI: 10.1594/pangaea.756119
title: (Table 1f) Radiocarbon dating of bottom sediments from Station AK26A-2625
DOI: 10.1594/pangaea.759777
title: Table 2 Radiocarbon measurements of charcoal and plant remains along core Lz1120

description: depth his corrected
DOI: 10.1594/pangaea.57055
title: Biostratigraphical datum events in sediment core CRP-2/2A (Table 7.1)
DOI: 10.1594/pangaea.759992
title: Table I. Radiocarbon dates of the humic acid free fraction (HAF), and the humic acid fraction (HA) from bulk sediment samples of cores Lz1020, Lake Hoare
DOI: 10.1594/pangaea.131646
title: (Table 1) Radionuclides in the water column at station PS1768-2
DOI: 10.1594/pangaea.716584
title: Tab. 15: 14C Radiocarbon dating of profile 7441-111 (Reisbach)
DOI: 10.1594/pangaea.894154
title: Stable carbon isotope of sediment core EMB046_20-3GC in the Skagerrak
DOI: 10.1594/pangaea.186315
title: Radiocarbon age determinations on sediment core ELT17.030-PC
DOI: 10.1594/pangaea.893826
title: Age determination of sediment core PLA, Lake Plaani Külajärv, Estonia

description: This dataset was archived on 2018-09-10 from the EPD database. (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.769668
title: (Table 1) AMS 14C ages of clam shells found in Core SLR 37-1

description: One shell from trawl TWL 38-1 was taken for the carbonate age of a 'recently' living clam.
DOI: 10.1594/pangaea.407609
title: Age determination of sediment core MD84-641
DOI: 10.1594/pangaea.57366
title: tab 2
DOI: 10.1594/pangaea.54970
title: Radionuclides of surface sediments from the Norwegian-Greenland Sea
DOI: 10.1594/pangaea.743945
title: Radiocarbon dating of profile Rotmoos
DOI: 10.1594/pangaea.871357
title: Table S31 - Calcareous Nannofossil Events ODP Site 208-1262

description: Note: * - ship, # - Agnini et al. 2007, B = Base, T = Top, Bc = Base common occurence, Tc = Top common occurence, Br = Base rare occurence, X=crossover.
DOI: 10.1594/pangaea.725920
title: (Table 2a) Results of radiocarbon analyses of mollusk shells from Core BP03-07/06
DOI: 10.1594/pangaea.727658
title: (Table 1) Age determination of sediment core PG1214
DOI: 10.1594/pangaea.84259
title: Radiocarbon (14C) age determinations on sediment core GIK12310-4

description: Conventional 14C ages without d13C correction; 68 % probability within the given standard deviation.
DOI: 10.1594/pangaea.784669
title: (Table 4) Radiocarbon datings of the authigenic carbonate buildup from Site AMK40-3745-M1-7
DOI: 10.1594/pangaea.327308
title: (Figure 6) Stable oxygen isotope record of planktic foraminifer Neogloboquadrina pachyderma from sediment core PS2458-4
DOI: 10.6084/m9.figshare.28426934
title: 123

description: Ai design education behavior
DOI: 10.6084/m9.figshare.28426934.v2
title: 123

description: Ai design education behavior
DOI: 10.1594/pangaea.438880
title: Age determination of sediment profile PG1179