cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.960984
title: NGRIP ice-core volcanic sulfate concentration and deposition from 79.14 to 80.48 ka BP

description: We present continuous records of 1 cm resolved sulfate concentrations, insoluble particle number and mass concentration, and liquid conductivity using a Continuous Flow Analysis (CFA) system (Bigler et al., 2002; Bigler et al., 2011; Erhardt et al., 2022) from the North Greenland Ice Core Project (NGRIP; 75.10°N, 42.33°W; 2941 m a.s.l.) and estimated volcanic sulfate mass depositions for the time period 79.14 and 80.48 ka BP on the GICC05modelext chronology, transferred to the AICC2012 chronology (Veres et al., 2013; Seierstad et al., 2014) using a common volcanic marker in EPICA Dome C ice core dated 79.51 ka BP. The reconstruction is based on sulfate measurements employing high-resolution continuous flow analysis. Volcanic eruptions are detected when annual sulfate concentrations exceeded the background concentrations + 4 times the median of the absolute deviation. Background concentrations are estimated using a 181-point running median. Volcanic sulfate deposition rates are calculated by subtracting the background concentrations from total sulfate concentrations using thinning corrected estimates of mean ice accumulation rates at the ice-core site.
DOI: 10.1594/pangaea.967267
title: Simulation of greenhouse gas production during key transitions in a coastal thermokarst landscape in an anaerobic incubation experiment with samples from Bykovsky Peninsula, Siberia

description: The dataset presents the greenhouse gas production (CO2 and CH4) from sediment of a terrestrial permafrost outcrop (Byk14-A-1; 71.85175°N, 129.350883°E), the thermokarst lake Goltsovoye (PG2412 (TKL), 71.74515°N, 129.30217°E), the nearly-closed Polar Fox Lagoon (PG2411 (LAG1), 71.743056°N, 129.337778°E) and the semi-open Uomullyakh Lagoon (PG2410-1 (LAG1), 71.730833°N, 129.2725°E). We incubated the samples anaerobically at 4 °C under fresh (c=0 g/L), brackish (c=13g/L) and marine (36g/L) conditions for one year and measured carbon dioxide (CO2) and methane (CH4) concentrations regularly in a 250 µL subsample using gas chromatography with an Agilent GC 7890A equipped with an Agilent HP-PLOT Q column. Cumulative CO2 and CH4 concentrations and production rates per day are given over time for all samples with three replicates each per gram of dry weight and normalised to gram of soil organic carbon (SOC).
DOI: 10.1594/pangaea.968792
title: Additional bottle chemistry values (ta, tco2, stable water isotopes, nutrients) for the NEG2017 cruises on the Northeast Greenland Shelf, August-September 2017

description: These data comprise previously published and additional CTD rosette bottle data including PO₄, Si(OH)₄, NH₃, NO₂, NO₃, δ¹⁸O, δ²H, TA and tCO₂ measurements obtained during the NEG2017 cruise from 23 August 2017 to 11 September 2017. The cruises were part of ongoing research into understanding the interaction between water masses and biogeochemistry on the Northeast Greenland shelf. Where necessary (e.g. tCO₂) samples were spiked with HgCl to eliminate biological changes in the sample. Samples were stored in the dark until analysed.
DOI: 10.1594/pangaea.968793
title: Additional bottle chemistry values (ta, tco2, stable water isotopes, nutrients) for the NorthGreen2017 cruise on the Northeast Greenland Shelf, August-September 2017

description: These data comprise previously published and additional CTD rosette bottle data including PO₄, Si(OH)₄, NH₃, NO₂, NO₃, δ¹⁸O, δ²H, TA and tCO₂ measurements obtained during the NorthGreen2017 cruise from 11 September 2017 to 1 October 2017. The cruises were part of ongoing research into understanding the interaction between water masses and biogeochemistry on the Northeast Greenland shelf. Where necessary (e.g. tCO₂) samples were spiked with HgCl to eliminate biological changes in the sample. Samples were stored in the dark until analysed.
DOI: 10.1594/pangaea.934701
title: Glycerol dialkyl glycerol tetraethers in a Holocene sediment core (NGHP-01-16A) in front of the Godavari River in the Bay of Bengal (India)

description: Isoprenoid and branched Glycerol Dialkyl Glycerol Tetraethers (GDGTs) have been analysed in a marine sediment core (NGHP-01-16A) in front of the Godavari River in the Bay of Bengal (16.59331°N, 82.68345°E, 1268m m water depth). The core covers the Early to Late Holocene (~10000 years). The age model and %TOC are from Ponton et al. (2012) and Usman et al. (2018), respectively. TEX86 ratios and Sea Surface Temperatures were estimated following Kim et al. (2010).
DOI: 10.1594/pangaea.960977
title: D4i Greenland ice-core non-sea-salt sulfur concentrations and calculated volcanic sulfate deposition (1733-1900 CE)

description: The D4 ice core was recovered in 2003 from a high elevation, cold site in the dry snow region of the Greenland ice sheet (71.4°N, 43.9°W, 2730 m asl, 41 cm water equivalent per year annual accumulation rate). Initial collection and previous analyses of the core have been reported earlier (e.g., McConnell et al., 2007). New longitudinal samples of ~32 by ~32 mm were cut (D4i) from contiguous sections of the remaining D4 core archived in a commercial storage facility in Reno. The samples from near and below the pore close-off depth (66-145 m depth; dating 1733-1900 CE) were analyzed continuously using a state-of-the-art ice core analytical system. https://icecores.org/inventory/d4 . Mean monthly D4i non-sea-salt sulfur concentrations corrected for sea-salt sulfur contribution based on [Na], assuming a S/Na mass ratio of seawater of 0.084 [Bowen, 1979]. Estimated mean monthly D4i median pre-industrial (1733-1875 CE) sulfur background concentrations after excluding volcanic events identified as monthly values exceeding the median concentrations plus two times the interquartile range (Q3 minus Q1). D4i Excess-sulfur concentrations defined as non-sea-salt sulfur concentrations minus sulfur background concentrations; negative values set to 0; using monthly resolved excess-sulfur, we estimated long-term trends with a 61-yr running median (RM); we attributed a volcanic origin to values exceeding a threshold of the RM + 4 x MAD (median of absolute deviation); we multiplied each monthly excess-sulfur concentration value exceeding the detection treshold with 0.41 water equivalent per year / 12 (i.e., assuming constant snowfall rate throughout the year) to derive monthly volcanic sulfate deposition at the D4 site.
description: The dataset has four columns and is presented at a nominal monthly resolution (mid-month). For example the first value is for a core depth of 66.27m and has a nominal age of 15 Dec 1900.
DOI: 10.1594/pangaea.934712
title: Branched glycerol dialkyl glycerol tetraethers, crenarchaeol and geochemical parameters in soils, SPM and riverbed sediments in the Godavari River basin (India)

description: The concentration and fractional abundance of branched Glycerol Dialkyl Glycerol Tetraethers (brGDGTs), including 5-methyl and 6-methyl isomers, were investigated in the soils, suspended particulate matter (SPM) and riverbed sediments of the Godavari River basin, the largest non-Himalayan river in India and fed by the Southwest monsoon. Surface soils (0-10 cm) were collected near the Godavari River, and SPM and riverbed sediments were collected in a dry (February/March) and wet season (July/August) in 2015. Crenarchaeol was measured, as well as pH, TOC, and soil and sediment geochemistry.
DOI: 10.15468/dl.84rw4n
title: Occurrence Download

description: A dataset containing 389 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cyclospermum leptophyllum",
 "Country is Japan",
 "HasCoordinate is true"
 ]
}

 The dataset includes 389 records from 31 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0036354-250717081556266/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.xdjct7
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cyclospermum leptophyllum",
 "Country is Mozambique",
 "HasCoordinate is true"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0036356-250717081556266/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.970378
title: Oxygen micro profiles of multi-corer sediment core HE595_48-3

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970380
title: Oxygen micro profiles of multi-corer sediment core HE595_70-1

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.15468/dl.k7xdnw
title: Occurrence Download

description: A dataset containing 3 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cyclospermum leptophyllum",
 "Country is Madagascar",
 "HasCoordinate is true"
 ]
}

 The dataset includes 3 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0036355-250717081556266/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.970326
title: Oxygen micro profiles of multi-corer sediment core HE595_26-1

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970383
title: Oxygen micro profiles of multi-corer sediment core HE595_12-3

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970385
title: Oxygen micro profiles of multi-corer sediment core HE595_1-3

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970381
title: Oxygen micro profiles of multi-corer sediment core HE595_9-1

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970386
title: Oxygen micro profiles of multi-corer sediment core HE595_45-1

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970387
title: Oxygen micro profiles of multi-corer sediment core HE595_41-4

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970388
title: Oxygen micro profiles of multi-corer sediment core HE595_97-1

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970389
title: Oxygen micro profiles of multi-corer sediment core HE595_6-1

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970392
title: Oxygen micro profiles of multi-corer sediment core HE595_69-2

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970393
title: Oxygen micro profiles of multi-corer sediment core HE595_98-3

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.970394
title: Oxygen micro profiles of multi-corer sediment core HE595_67-5

description: This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).
DOI: 10.1594/pangaea.972033
title: Three-year recordings of tectonic-climate data from Moxa Geodynamic Observatory

description: The dataset includes recordings from laser strainmeters, a weather station and several groundwater monitoring wells from Moxa Geodynamic Observatory, located in central Germany. The recordings of the laser strainmeters include measurements along the North-South and East-West directions. The data from the weather station contains recordings of temperature, barometric pressure, wind speed, global radiation, humidity, and snow load. This dataset was compiled for analyzing the causal relationship between climatic variables and strain measurements and covers the period from November 2014 to October 2017. The data has a temporal resolution of one hour, which was calculated from the original temporal resolution of 10 seconds by calculating the mean value. Laser strainmeter measurements underwent error correction and were corrected for Earth tides using the Cleanstrain + package (Langbein, 2010).
DOI: 10.1594/pangaea.968969
title: Solid-phase porosity, grain sizes, TOC, 210Pbxs and 137Cs data for sediment cores taken during RV Heincke cruise HE575 and HE595 in the Helgoland Mud Area, SE German Bight

description: This dataset includes solid-phase porosities, grain sizes (D10, D50 and mud contents), total organic carbon (TOC) contents, 210Pbxs activities and 137Cs activities (both with 1-sigma uncertainties) from multi-corer sampling retrieved during RV Heincke expeditions HE575 and HE595 in 2021 and 2022 respectively. The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea). Solid-phase porosity, 210Pbxs and 137Cs data were produced in the laboratories of the Alfred Wegener Institute (AWI) in Bremerhaven, Germany. Grain sizes were analysed at Alfred Wegener Institute (AWI) in List/Sylt, Germany. Total organic carbon contents were determined at the Faculty of Geosciences at the University of Bremen, Bremen, Germany.
DOI: 10.1594/pangaea.969033
title: Pore-water dissolved inorganic carbon (DIC) and its stable carbon isotopic composition (δ13C) for sediment cores taken during RV Heincke cruise HE575 and HE595 in the Helgoland Mud Area, German Bight

description: This dataset includes downcore measurements of dissolved inorganic carbon (DIC) and its stable carbon isotopic composition (δ13C-DIC) for sediment cores retrieved using multi-corer sampling during RV Heincke expeditions HE575 and HE595 in 2021 and 2022 respectively. The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea). DIC contents were determined in the laboratories of the Alfred Wegener Institute (AWI) in Bremerhaven, Germany. The δ13C-DIC data were produced at MARUM—Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany.
DOI: 10.1594/pangaea.968994
title: Compilation of studies on sediments since the mid-20th century in and around the Helgoland Mud Area, SE German Bight, North Sea (GIS shape file)

description: This dataset is a literature compilation of sediment work carried out in and around the Helgoland Mud Area in the German Bight of the North Sea. It includes authors, titles, sample locations and corresponding parameters of 31 studies and 177 respective sampling locations.
DOI: 10.1594/pangaea.966770
title: Water and ice temperatures measured by thermistor probe in a melt pond during expedition PS122/5 (MOSAiC Leg 5) to the central Arctic in August-September 2020

description: The temperatures at water depths of 0.015, 0.05, 0.1, and 0.2 m were measured by thermistor probe (TR-5120, T&D Corp., Nagano, Japan) and temperature data were stored in a data logger (TR-52i, T&D Corp.) at St. 1 melt pond during expedition PS122/5 (MOSAiC Leg 5) to the central Arctic in August-September 2020. In order to install the thermistor probe, we used stick longer than the diameter of the pond.
DOI: 10.1594/pangaea.971690
title: Stable oxygen and carbon isotope record of stalagmite C09-2 from Cloşani Cave (20 ka to modern)

description: This dataset covers stable isotope and trace element records covering the last 20ka from two speleothems (C09-2, C09-1) from Cloşani Cave, Romania. This datasets extends the previously published data obtained from stalagmite C09-2 in time and adds additional trace elements to the existing record (compare to Warken et al., 2019 doi:10.1594/PANGAEA.909989). High resolution trace element data obtained from laser ablation ICPMS are downsampled to annual mean values.
DOI: 10.1594/pangaea.966749
title: Profiles of temperature, salinity, and density measured by a handheld CTD in melt ponds during expedition PS122/5 (MOSAiC Leg 5) to the central Arctic in August-September 2020

description: Water temperature, salinity and density were obtained in melt ponds within the MOSAiC Leg 5 ice camp between 23 August and 14 September 2020. A Rinko handheld CTD (JFE Advantech Co., Ltd., Japan) was carefully lowered into the melt ponds on a regular basis to determine the spatial distribution and temporal evolution of the stratification. A fresh meltwater layer was detected within the melt ponds. As part of a dedicated study, the present dataset documents the evolution of this layer.
DOI: 10.1594/pangaea.972606
title: Stable oxygen and carbon isotope record of stalagmite C09-1 from Cloşani Cave (20 ka to modern)

description: This dataset covers stable isotope and trace element records covering the last 20ka from two speleothems (C09-2, C09-1) from Cloşani Cave, Romania. This datasets extends the previously published data obtained from stalagmite C09-2 in time and adds additional trace elements to the existing record (compare to Warken et al., 2019 doi:10.1594/PANGAEA.909989). High resolution trace element data obtained from laser ablation ICPMS are downsampled to annual mean values.
DOI: 10.1594/pangaea.972607
title: Trace element record of stalagmite C09-1 from Cloşani Cave (20 ka to modern)

description: This dataset covers stable isotope and trace element records covering the last 20ka from two speleothems (C09-2, C09-1) from Cloşani Cave, Romania. This datasets extends the previously published data obtained from stalagmite C09-2 in time and adds additional trace elements to the existing record (compare to Warken et al., 2019 doi:10.1594/PANGAEA.909989). High resolution trace element data obtained from laser ablation ICPMS are downsampled to annual mean values.
DOI: 10.1594/pangaea.972608
title: Trace element record of stalagmite C09-2 from Cloşani Cave (20 ka to modern)

description: This dataset covers stable isotope and trace element records covering the last 20ka from two speleothems (C09-2, C09-1) from Cloşani Cave, Romania. This datasets extends the previously published data obtained from stalagmite C09-2 in time and adds additional trace elements to the existing record (compare to Warken et al., 2019 doi:10.1594/PANGAEA.909989). High resolution trace element data obtained from laser ablation ICPMS are downsampled to annual mean values.