cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.974167
title: Geochemical, pollen and bulk density record of MIS11-1 from Lake Petén Itzá (Site PI-6) Guatemala

description: We present data on bulk density, inorganic geochemistry (Ti, Ca, Al, Mn, and Fe), and pollen (Quercus, Moraceae, Pinus, tropicality index) from Lake Petén Itzá. In 2006, Lake Petén Itzá was drilled by the International Continental Scientific Drilling Program (ICDP), obtaining seven lacustrine sediment records: PI-01, PI-02, PI-03, PI-04, PI-06, PI-07, and PI-09. Here, we present data from Site PI-6 (17.00027°N, -89.78478°W), located in the northern part of the lake. At the Continental Scientific Drilling Facility at the University of Minnesota, bulk density was analyzed using a GEOTEK multi-sensor core logger with gamma-ray attenuation, with measurements taken every 0.5 cm. Inorganic geochemistry data were obtained using X-ray fluorescence (XRF) with a Cox Analytical Itrax Core Scanner. PI-6 sediments were measured with a Mo-tube at 30 kV, 20 mA, 30-second exposure, at 0.5-cm resolution. XRF data are presented in counts per second (cps). Subsequently, data were transformed to centered log-ratio (CLR). CLR values were obtained by dividing each element's concentration by the geometric mean of the elements measured at the same depth, then taking the natural logarithm of the ratio. CLR results have no units. Pollen data include a dataset of 39 samples from Site PI-6, previously published by Correa-Metrio et al. (2012). For each sample, pollen abundances were converted into percentages of the pollen sum. A "tropicality index" was calculated as ln(Moraceae% + 1) / ln(Quercus% + Pinus% + 1). Depth data correspond to the "Core composite depth below lake floor (CCLF)" or "Master composite depth (MCD)", which accounts for core recovery gaps and depth inconsistencies, while age data are based on the age-depth models presented by Martínez-Abarca et al. (2024).
description: Empty values were not measured/counted at the specific depth
DOI: 10.13130/rd_unimi/n9enq4/iewy7w
title: force_disp_final-138.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/w6d2op
title: edges_final-103.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.944997
title: Morphometrics from the shells of Globorotaloides hexagonus from sediment core TR163-23

description: Here we document the morphometric measurements from the shells of planktic foraminifer Globorotaloides hexagonus from Eastern Equatorial Pacific core site TR163-23 (0° 24.6' N, 92° 9.6' W; 2,730 m depth). Morphometric measurements include the length of the shell along the longest dimension from the final chamber, the number of chambers in the final whorl, and porosity. Porosity was assessed by the percentage of surface area on the final chamber consisting of pores. Stable isotope analyses were carried out on pooled samples of 3-10 shells, while morphometrics were measured in individuals.
DOI: 10.1594/pangaea.948182
title: Last Millennium U/Th ages of MV30 stalagmite record from Mata Virgem cave

description: Presented here are U-Th ages derived from the MV30 stalagmite. This sample was collected from Mata Virgem cave (11°37′27.07′′S, 47°29′19.04′′W) in the eastern region of the Brazilian tropical Savannah known as 'Cerrado'. 13 age ties have been calculated, including one that is an outlier (depth = 14 cm).
description: • Note that only the upper and lower sections of the sample have stable isotope data available. Data without errors represent averaged values from above and below samples to preserve the stable isotope curve tendancy.• The errors represent 2s error.• U decay constants: l238 = 1.55125x10-10 (Jaffey et al., 1971) and l234 = 2.82206x10-6 (Cheng et al., 2013). Th decay constant: l230 = 9.1705x10-6 (Cheng et al., 2013).• d234U = ([234U/238U]activity - 1)x1000.• d234Uinitial was calculated based on 230Th age (T), i.e., d234Uinitial = d234Umeasured x el234xT. • Corrected 230Th ages assume the initial 230Th/232Th atomic ratio of 4.4 ±2.2 x10-6. Those are the values for a material at secular equilibrium, with the bulk earth 232Th/238U value of 3.8. The errors are arbitrarily assumed to be 50%. • B.P. stands for "Before Present" where the "Present" is defined as the year 1950 A.D.
DOI: 10.13130/rd_unimi/n9enq4/4vrqvf
title: opt-130.txt

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.935527
title: In situ Magnesium/Calcium analyses by LA-ICP-MS in individual N. pachyderma shells from plankton tows deployed in the Fram Strait
DOI: 10.13130/rd_unimi/n9enq4/4fouzl
title: nodes_init-143.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.928409
title: Element analysis of sediment core JR298-PC727
DOI: 10.13130/rd_unimi/n9enq4/dcsfv6
title: opt-121.txt

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/riw467
title: edge_data_final-136.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.902776
title: (Supplement 2) Manual morphometric foraminifera data from a sediment trap from the West Antarctic Peninsula
DOI: 10.1594/pangaea.964943
title: Early Eocene-early Oligocene carbon and oxygen stable isotope data of bulk carbonates from IODP Site U1557

description: Here, we present carbon and oxygen stable isotope data measured on bulk carbonates samples from Site U1557. This site was drilled during the International Ocean Discovery Program engineering Expedition 390C and is part of the South Atlantic Transect (SAT), a transect drilled across the western side of the southern Mid-Atlantic Ridge at ~31°S. The data set spans the early Eocene-early Oligocene, according to the shipboard preliminary age model for this site. The data reported here can be used to refine the age model for this site, to correlate this site with sites from other ocean basins, and could be of help in paleoceanography-related investigations.
DOI: 10.13130/rd_unimi/n9enq4/c8lvlt
title: opt-134.txt

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.948181
title: Last Millennium U/Th ages of MV1 stalagmite record from Mata Virgem cave

description: Presented here are U-Th ages derived from the MV1 stalagmite. This sample was collected from Mata Virgem cave (11°37′27.07′′S, 47°29′19.04′′W) in the eastern region of the Brazilian tropical Savannah known as 'Cerrado'. 11 age ties have been calculated, including two based on weighted means of the same depth.
description: • Note that only the upper and lower sections of the sample have stable isotope data available. Data without errors represent averaged values from above and below samples to preserve the stable isotope curve tendancy.• The errors represent 2s error.• U decay constants: l238 = 1.55125x10-10 (Jaffey et al., 1971) and l234 = 2.82206x10-6 (Cheng et al., 2013). Th decay constant: l230 = 9.1705x10-6 (Cheng et al., 2013).• d234U = ([234U/238U]activity - 1)x1000.• d234Uinitial was calculated based on 230Th age (T), i.e., d234Uinitial = d234Umeasured x el234xT. • Corrected 230Th ages assume the initial 230Th/232Th atomic ratio of 4.4 ±2.2 x10-6. Those are the values for a material at secular equilibrium, with the bulk earth 232Th/238U value of 3.8. The errors are arbitrarily assumed to be 50%. • B.P. stands for "Before Present" where the "Present" is defined as the year 1950 A.D.
DOI: 10.13130/rd_unimi/n9enq4/lrigz8
title: nodes_init-125.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/rdgk8n
title: edges_init-145.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.965570
title: Terrigenous grain size as sortable silt from IODP Sites 342-U1406
DOI: 10.1594/pangaea.967471
title: Monospecific benthic δ18O data from Cape Hatteras and Blake Outer Ridge during the Mid-Holocene (2-6 ka BP) and LGM (19-23 ka BP)

description: This dataset contains monospecific benthic δ18O data from cores that form depth transects at Cape Hatteras and Blake Outer Ridge. Data is from either the Mid-Holocene or LGM and is combined to form multi-species benthic δ18O means for each core during the Mid-Holocene and/or LGM (can you add a link to Vertical δ18O profiles from Cape Hatteras and Blake Outer Ridge during the Mid-Holocene (2-6 ka BP) and LGM (19-23 ka BP)?). For species that calcify in disequilibrium with the surrounding seawater, e.g., Uvigerina peregrina, species specific correction factors have been applied. For infaunal species where a range of values are published, the correction factor is determined by calculating the average offset from coeval measurements on C. wuellerstorfi or other epifaunal species, which, in all cases, are within the range of uncertainty of published correction factors. Reproducibility is the species specific error for each transect (e.g., Cape Hatteras) and timeslice (e.g., LGM) and n is the number of individual foraminifera in each measurement. Stable isotope measurements were performed using a VG Isogas SIRA mass spectrometer with Multicarb preparation system (&gt;80 μg) and a Thermo MAT253 isotope ratio mass spectrometer with Kiel IV carbonate preparation device (&lt;80 μg) at the Godwin Laboratory, University of Cambridge. δ18O and δ13C are reported relative to the Vienna Peedee belemnite (VPDB) standard, and for both instruments analytical precision is estimated to be better than ±0.07 ‰ and ±0.04 ‰ respectively.
description: Isotopic ratios were measured either with a VG Isogas SIRA mass spectrometer with Multicarb preparation system (&gt;80 μg) or with a Thermo MAT253 isotope ratio mass spectrometer with Kiel IV carbonate preparation device (&lt;80 μg).
DOI: 10.13130/rd_unimi/n9enq4/z3qzbp
title: nodes_final-124.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.967463
title: Vertical δ18O profiles from Cape Hatteras and Blake Outer Ridge during the Mid-Holocene (2-6 ka BP) and LGM (19-23 ka BP)

description: This dataset consists of glacial and Mid-Holocene multi-species benthic δ18O mean data from cores that form depth transects at Cape Hatteras and Blake Outer Ridge. The mean δ18O for each core was derived by averaging multiple monospecific measurements from different depth intervals corresponding to the MH or LGM. The standard error is σ/√n; where σ is the multi-species replicate error at either CH or BOR across both time periods, and n is the number of species analysed at each core. Stable isotope measurements were performed using a VG Isogas SIRA mass spectrometer with Multicarb preparation system (&gt;80 μg) and a Thermo MAT253 isotope ratio mass spectrometer with Kiel IV carbonate preparation device (&lt;80 μg) at the Godwin Laboratory, University of Cambridge. δ18O and δ13C are reported relative to the Vienna Peedee belemnite (VPDB) standard, and for both instruments analytical precision is estimated to be better than ±0.07 ‰ and ±0.04 ‰ respectively. Where foraminiferal abundances were low and/or bulk sediment was scarce or unavailable, we also supplemented our data with published δ18O data. This file also contains glacial sortable silt mean grain size data for a limited number of cores from both transects. Samples were processed using established methods (McCave et al., 1995) and analyzed at University College London on a Beckman Coulter Multisizer using the Enhanced Performance Multisizer 4 beaker and stirrer to ensure full sediment suspension. Two or three separate aliquots were analyzed for each sample, sizing 70,000 particles per aliquot. Full procedural error based on replicates starting from newly sampled bulk sediment was ±0.32 μm (n=10). Glacial mean sortable silt values were calculated by averaging data from sediments corresponding to between 19 and 23 ka BP. The standard error is σ/√n; where σ is the standard deviation of glacial measurements for each core, and n is the number of glacial measurements for each core.
description: Isotopic ratios were measured either with a VG Isogas SIRA mass spectrometer with Multicarb preparation system (&gt;80 μg) or with a Thermo MAT253 isotope ratio mass spectrometer with Kiel IV carbonate preparation device (&lt;80 μg).
DOI: 10.13130/rd_unimi/n9enq4/hxsvwc
title: force_disp_final-112.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/rzvxyq
title: force_disp_init-109.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.934414
title: Intercalibrated dataset of in situ dissolved organic matter fluorescence from ice tethered profile 64 in the Central Arctic (2012-2013)

description: Here we present a merged and calibrated dataset of temperature, practical salinity and dissolved organic matter (DOM) fluorescence obtained from several Ice Tethered Profilers (ITPs) deployed across the central Arctic (2011-2016). The data offer a unique spatial coverage of the distribution of DOM in the surface 800 m below Arctic sea ice. A total of 5044 profiles are gathered. The ITP data are level 3 data products pressure-bin-averaged at 1-db vertical resolution with depth down to either 200 or approximately 750 m. Data (max 800m depth) from CTD casts made during two oceanographic cruises are also included. These were used as part of the calibration and validation of the ITP calibration routines. The cruises were PS94 (ARK-XXIX/3) with POLARSTERN in 2015 and NAACOS with DANA in 2012. The presented DOM fluorescence data are smoothed, corrected for instrument drift and calibrated to provide intercomparable data across the sensors. Fluorescence is reported in Raman Units (nm-1), and comparable to laboratory measurements conducted according to current community recommendations.
DOI: 10.1594/pangaea.967472
title: Downcore and single benthic foraminiferal δ18O data from Cape Hatteras and Blake Outer Ridge during the last 25 ka BP

description: This dataset contains downcore benthic δ18O data from four cores at Cape Hatteras (for each core there is data from between one and three different benthic foraminifera species). Also included are single foraminiferal δ18O and δ13C measurements from Blake Outer Ridge core ODP-172-1054 during the LGM. Benthic foraminifera were picked from the &gt;212 μm sediment size fraction, with samples typically consisting of between 5 and 15 specimens and weighing between 25 and 212 212 μg. Depending on sample size, stable isotope measurements were performed using a VG Isogas SIRA mass spectrometer with Multicarb preparation system (&gt;80 μg) and a Thermo MAT253 isotope ratio mass spectrometer with Kiel IV carbonate preparation device (&lt;80 μg) at the Godwin Laboratory, University of Cambridge. δ18O and δ13C are reported relative to the Vienna Peedee belemnite (VPDB) standard, and for both instruments analytical precision is estimated to be better than ±0.07 ‰ and ±0.04 ‰ respectively.
description: Isotopic ratios were measured either with a VG Isogas SIRA mass spectrometer with Multicarb preparation system (&gt;80 μg) or with a Thermo MAT253 isotope ratio mass spectrometer with Kiel IV carbonate preparation device (&lt;80 μg).
DOI: 10.13130/rd_unimi/n9enq4/bq8qpp
title: nodes_init-142.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.928486
title: Grain-size composition and water content of sediment core JR298-GBC735
DOI: 10.1594/pangaea.940834
title: Hydrological and isotope measurements in the Djankuat research basin from 2019-2020
DOI: 10.13130/rd_unimi/n9enq4/cit2mi
title: force_disp_init-108.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/uj3whs
title: force_disp_final-114.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.928481
title: Grain-size composition and water content of sediment core JR298-PC732
DOI: 10.13130/rd_unimi/n9enq4/w27evh
title: nodes_init-102.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.928480
title: Grain-size composition and water content of sediment core JR298-PC728
DOI: 10.1594/pangaea.928482
title: Grain-size composition and water content of sediment core JR298-PC736
DOI: 10.13130/rd_unimi/n9enq4/0grgod
title: edge_data_final-115.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/be4df6
title: nodes_init-130.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.937781
title: Magnaprobe snow and melt pond depth measurements from the 2019-2020 MOSAiC expedition

description: At MOSAiC, we collected snow depths by Magnaprobe - an automated snow depth probe, throughout the seasons, most often alongside electromagnetic measurements for deriving total thickness. Most of the data were collected routinely along established transect lines and loops to create timeseries. Some data were collected opportunistically e.g., during 'events'. In addition, several repeated ridge transects were established. During the melt season (June – September 2020), the Magnaprobe was used to measure snow depth, surface scatter layer depth and melt pond depth. This repository includes data obtained by Magnaprobe, sea ice thickness derived by subtracting snow depth from co-located total thickness measurements, a descriptive document including maps (Magnaprobe Repository Description), and a table of with other transect-mode measurements at MOSAiC (Action Log Table): remote sensing instruments, snow structure measurements etc.
description: All files are text files. Most of the files are data files. Some files are meta files (descriptive text).The data files are comma separated value values. Depending on the processing level they may have a header.The data structure in this repository is organized in the following manner:1. All data are sorted into folders by 'scientific activity' number.2. Raw data have the file-naming structure: magnaprobe-transect-date-activity_raw.dat (for example: magnaprobe-transect-20191024-PS122-1_4-1_raw.csv).3. Level 1 data have the file-naming structure: magnaprobe-transect-date-activity-_location.csv. All possible locations are listed in the paragraph below.4. Level 2 location data have same filenames as the Level 1 data, but with added suffixes:a. -track.csv: track with geographic coordinatesb. -track-icecs-yx.csv: track with added local coordinatesc. -track-icesc-xy_corr.csv: track with local coordinates shifted to better correspond the local coordinates of GEM-25. Level 3 data have the file-naming structure: magna+gem2-transect-activity_location.csv.6. In addition, some folders contain text files with activity descriptions. For legs 4-5 there are point-wise comments in the last column of the level 1 data.
DOI: 10.1594/pangaea.956152
title: PlioVAR KM5c, M2 sea surface temperature (SST) anomalies
DOI: 10.13130/rd_unimi/n9enq4/j7k86h
title: nodes_init-149.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.946935
title: Absolute abundances of benthic foraminifera in the South Dover Bridge core
DOI: 10.1594/pangaea.946936
title: Relative abundances of benthic foraminifera and biogroups in the South Dover Bridge core
DOI: 10.13130/rd_unimi/n9enq4/1vhn6c
title: opt-131.txt

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/rkdpvv
title: edges_final-141.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.946582
title: Metalloporphyrin concentrations and selected metal abundances ODP Site 207-1258, Demerara Rise

description: Metalloporphyrins, and metal-specific porphyrins (e.g. VO-porphyrins), are summed concentrations of multiple compounds shown in Fig. S2 (Connock et al., 2022). Metal abundances are from previous work (Owens et al., 2006; doi:10.1016/j.epsl.2016.05.046). Horizontal black lines bracket the OAE 2 interval.
DOI: 10.1594/pangaea.979617
title: Lake water chemistry profiles

description: Diatom-derived highly branched isoprenoids (HBIs) are found extensively in marine sediments, but are observed in a limited number of lake sediments. To expand on this record, between 2022 and 2024, we collected lake surface sediment samples from 50 lakes in the United States of America from the Midwest and Northeast. Studied lakes capture a range in climate, water chemistry (e.g., pH, salinity, alkalinity), size, and trophic states. Lakes also vary in their diatom species compositions. Water chemistry profiles were measured in each lake. Water chemistry parameters included pH, conductivity, salinity, oxidation reduction potential, dissolved oxygen and were measured using a multiparameter sonde.
DOI: 10.13130/rd_unimi/n9enq4/lyhiaz
title: edges_init-113.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.943338
title: Foraminifera abundance of sediment core KNR197-10CDH42
DOI: 10.1594/pangaea.979618
title: Lake water sample chemistry

description: Diatom-derived highly branched isoprenoids (HBIs) are found extensively in marine sediments, but are observed in a limited number of lake sediments. To expand on this record, between 2022 and 2024, we collected lake surface sediment samples from 50 lakes in the United States of America from the Midwest and Northeast. Studied lakes capture a range in climate, water chemistry (e.g., pH, salinity, alkalinity), size, and trophic states. Lakes also vary in their diatom species compositions. Water was collected for water chemistry at three depths including the "surface" at 10 cm depth, an "integrated" surface sample, and "deep" water (2 m above sediment/water interface) when lake depth permitted. The integrated sample was designed to collect the water from the euphotic zone where phytoplankton are concentrated. Water was sampled from the euphotic zone (calculated as 2 times the Secchi disk depth) using an integrated water sampler fabricated from a 2 m long x 5.2 cm ID PVC pipe (2" nominal schedule 40 PVC pipe) fitted with a ball valve at the top. When the euphotic zone was &gt;2 m, only the upper 2 m was sampled. When the euphotic zone intersected with the sediment/water interface, water was collected from the surface to 0.5 m above the sediment/water interface. Discrete water samples were collected at other depths using a horizontal water sampler. Water samples were analyzed for alkalinity, dissolved inorganic carbon (DIC) concentration, and DIC carbon isotopes.
DOI: 10.13130/rd_unimi/n9enq4/tslyyc
title: edges_final-106.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.1594/pangaea.946580
title: Biomarker concentrations from ODP Site 207-1258, Demerara Rise

description: Free base- (FB) chlorins, FB-porphyrins, metalloporphyrins, obGDGTs, DAGEs, and ext. Archaeols are summed concentrations of multiple compounds shown in Fig. S2 (Connock et al., 2022). Horizontal black lines bracket the OAE 2 interval.
DOI: 10.13130/rd_unimi/n9enq4/krz3d5
title: nodes_final-132.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/eujll8
title: force_disp_init-146.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/wg5kfv
title: edges_init-105.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip
DOI: 10.13130/rd_unimi/n9enq4/e3nhjg
title: edges_final-142.dat

description: 250729_SIMULATION_DATA/TENS-M_1.zip