cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.956021
title: Seawater carbonate chemistry and cellular inorganic carbon fluxes in Trichodesmium

description: To predict effects of climate change on phytoplankton, it is crucial to understand how their mechanisms for carbon acquisition respond to environmental conditions. Aiming to shed light on the responses of extra- and intracellular inorganic C (Ci) fluxes, the cyanobacterium Trichodesmium erythraeum IMS101 was grown with different nitrogen sources (N2 vs NO3 –) and pCO2 levels (380 vs 1400 µatm). Cellular Ci fluxes were assessed by combining membrane inlet mass spectrometry (MIMS), 13C fractionation measurements, and modelling. Aside from a significant decrease in Ci affinity at elevated pCO2 and changes in CO2 efflux with different N sources, extracellular Ci fluxes estimated by MIMS were largely unaffected by the treatments. 13C fractionation during biomass production, however, increased with pCO2, irrespective of the N source. Strong discrepancies were observed in CO2 leakage estimates obtained by MIMS and a 13C-based approach, which further increased under elevated pCO2. These offsets could be explained by applying a model that comprises extracellular CO2 and HCO3– fluxes as well as internal Ci cycling around the carboxysome via the CO2 uptake facilitator NDH-14. Assuming unidirectional, kinetic fractionation between CO2 and HCO3– in the cytosol or enzymatic fractionation by NDH-14, both significantly improved the comparability of leakage estimates. Our results highlight the importance of internal Ci cycling for 13C composition as well as cellular energy budgets of Trichodesmium, which ought to be considered in process studies on climate change effects.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2021) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2023-02-20.
DOI: 10.1594/pangaea.385559
title: Nucleic acids in sediment core 13627-015
DOI: 10.1594/pangaea.385560
title: Nucleic acids in sediment core 13627-022
DOI: 10.1594/pangaea.743272
title: (Table 1) Geochemistry of ODP Hole 101-635B
DOI: 10.1594/pangaea.794493
title: (Appendix A) Concentrations and unsaturation indices of alkenones and alkenoates in ODP Hole 167-1016C sediments
DOI: 10.1594/pangaea.385553
title: Nucleic acids in sediment core 13077-057
DOI: 10.1594/pangaea.838182
title: Pollen profile PODKOVA, Russia

description: This dataset was archived on 2014-11-03 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.143699
title: Sedimentology and analysis of organic matter in core GIK23071-2
DOI: 10.1594/pangaea.58386
title: Biogeochemical parameters measured on sediment profile of multicorer M33/1_MC-15
DOI: 10.1594/pangaea.855452
title: High-resolution IP25 of sediment core SO201-2-77
DOI: 10.1594/pangaea.830535
title: Pigments in natural and transplanted sediments at Panarea shallow CO2 seeps during cruise ECO2-8
DOI: 10.1594/pangaea.54690
title: Organic geochemistry on sediment core PS2446-4
DOI: 10.1594/pangaea.947134
title: Meteorological data (1997-2018) of experimental field station in Bad Lauchstädt, Germany

description: The considered data set contains measurements of 4 automatic weather stations from 1997 until 2018 installed by Helmholtz Centre for Environmental Research - UFZ GmbH. Here, the main station corresponded to typical sensor technology and equipment of the German Meteorological Service [Deutscher Wetterdienst, DWD]. These data were quality-checked and processed as daily values. As far as possible, erroneous values were replaced by means of other stations on site. Very short failures could be supplemented by interpolation or averaging. Hence, values of measured variable can originate from different stations. However, only one value for each measured variable is provided for every day within the table. A unique label for individual weather stations is used to identify the exact origin of data.
DOI: 10.1594/pangaea.948496
title: Intact polar lipid concentrations of sediment core HE519_2-3

description: Intact polar lipids (IPLs) were extracted by a modified Bligh and Dyer extraction. The total lipid extract was seperated via column chromatography (activated Si-column). Displayed data shows the analyzed polar subfraction of the individual sediment intervals.
DOI: 10.1594/pangaea.948497
title: Intact polar lipid concentrations of sediment core HE560_26-2

description: Intact polar lipids (IPLs) were extracted by a modified Bligh and Dyer extraction. The total lipid extract was seperated via column chromatography (activated Si-column). Displayed data shows the analyzed polar subfraction of the individual sediment intervals.
DOI: 10.1594/pangaea.874356
title: (Supplementary Table 3) Biomarker data of Core PS51/38-3 (Time interval MIS 6 - MIS5)

description: #999 = present
DOI: 10.1594/pangaea.948498
title: Intact polar lipid concentrations of sediment core HH14-897-GC-MF

description: Intact polar lipids (IPLs) were extracted by a modified Bligh and Dyer extraction. The total lipid extract was seperated via column chromatography (activated Si-column). Displayed data shows the analyzed polar subfraction of the individual sediment intervals.
DOI: 10.1594/pangaea.855503
title: Biomarker proxies on sediment core PS87/095-1

description: #-999 = trace amounts
DOI: 10.1594/pangaea.908653
title: Alkenone data and sea surface temperature reconstructions of sediment core AXC1432 from Nørre Skjoldungesund, Greenland shelf
DOI: 10.1594/pangaea.951667
title: Historical meteorological data (1896 – 1955) of experimental field station in Bad Lauchstädt, Germany

description: The historical weather data from 1896 to 1955 complete the long-term series of measurements of the weather data of Bad Lauchstädt. Values are available for air temperature and precipitation as pentad values (sum values of 5 days). Unfortunately, the exact origin of the data, as well as the measurement method and the quality of the data cannot be described. The data were digitalized on basis of original records of the experimental station and documents of the Central Office of the German Meteorological Service [Deutscher Wetterdienst] (see reference Hoffmann et al.).The data were checked for plausibility, but a residual uncertainty still remains. Nevertheless, the data represent an important contribution to a complete weather description at the site of Bad Lauchstädt. With the help of these data, evaluations and modelling of long-term experiments are possible.
DOI: 10.1594/pangaea.217797
title: Biogeochemistry in surface sediment during PELAGIA cruise PLG93
DOI: 10.1594/pangaea.759834
title: (Table 3) Vertical distribution of phytopigment and bacterial parameters in the sediment cores of profile D1-D7
DOI: 10.1594/pangaea.905514
title: Sterols in sediment core PS93/025
DOI: 10.1594/pangaea.55436
title: Pigments and TOC of sediment core IOW211660-6
DOI: 10.1594/pangaea.920231
title: Hemispherical-directional reflectance factor (HDRF) of snow surfaces retrieved from airborne camera measurements in Antarctica during austral summer in 2013/14 (links to files)

description: The hemispherical-directional reflectance function (HDRF) of snow surfaces was measured in Antarctica during austral summer in 2013/14. The HDRF was retrieved from airborne measurements using a digital 180° fish-eye camera onboard the research aircraft Polar 6 operated by the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), Bremerhaven, Germany.The dataset contains the weighting functions for isotropic (f_iso), volumetric (f_vol), and geometric (f_geo) scattering obtained by inverting the kernel-driven, semi-empirical Ross-Thick-Li-Sparse-Reciprocal model for the bidirectional reflectance distribution function (BRDF). Along with the weighting functions f_iso, f_vol, and f_geo, the weights of determination (WoD) and root-mean-square errors (RMSE) are given as a criterion for the quality of the inversion for all 3 camera channels (Red: 602 nm central wavelength, Greeen: 538 nm, Blue: 470 nm). In addition, the footprint size of the camera observations is stated.The snow HDRF was measured over a variety of different solar zenith angles, optical-equivalent snow grain sizes, and surface roughness, which are given as parameters within the dataset. The optical-equivalent snow grain size was retrieved from spectral surface albedo measurements with the Spectral Modular Airborne Radiation measurement sysTem (SMART) mounted on Polar 6 using observations at 1280 and 1100 nm wavelength. The surface roughness was measured using the airborne laser scanner RIEGL VQ580 on Polar 6.Averaging was performed over time intervals of 30 s. The number of camera pictures, SSA measurements and laser scanner observations used for averaging over each 30s-interval are given.The dataset further includes basic flight parameters such as the second of day, longitude, latitude, flight altitude, surface elevation, aircraft velocity, and an attitude flag (0 = okay, 1 = do not use) corresponding to the times of measurement.Use of these data requires prior OK from the PIs.
DOI: 10.1594/pangaea.903713
title: Alkane content of ODP Hole 122-763A
DOI: 10.1594/pangaea.720997
title: Pigments of sediment core 54301-009
DOI: 10.1594/pangaea.950112
title: Fatty acid distribution in ancient permafrost deposits at the Batagay Megaslump, East Siberia

description: This dataset presents the fatty acid concentrations (range: n-C12 to n-C34) from 9 sediment samples which are given in µg/g sediment. Different fatty acid compounds were found: n-fatty acids, iso-branched, anteiso-branched, monounsaturated, methyl branched, cyclopropyl, di-unsaturated and hydroxyl fatty acids, as well as phytanic acid. Biomarker parameters include the concentrations of short-chain (n-C12 to n-C19) and long-chain (n-C20 to n-C34) n-fatty acids, the higher plant fatty acid index (HPFA) and the ratio of iso- and anteiso-branched fatty acids C15 and C17 versus long-chain n-fatty acids (IA index). The fatty acids were measured using a TRACE 1310 Gas Chromatograph coupled to a TSQ 9000 Mass Spectrometer (Thermo Scientific).
DOI: 10.1594/pangaea.774043
title: (Table T2) Carbon, carbonate, n-alkane and alkenone concentrations of ODP Site 202-1239

description: Sediment depth is given in mcd. #0 = below detection limit.
DOI: 10.1594/pangaea.784930
title: CNS-analysis from IODP Hole 333-C0012C

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.838030
title: Pollen profile DOE, Russia

description: This dataset was archived on 2014-11-03 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.776748
title: (Table T2) Organic geochemistry of ODP Hole 210-1276A shales

description: Sediment depth is given in mbsf. Age determinations from Shipboard Scientific Party (2004, doi:10.2973/odp.proc.ir.210.103.2004) and S. Gardin (pers. comm.). For TOC values see Table T1 (doi:10.1594/PANGAEA.776747).
DOI: 10.1594/pangaea.834243
title: Impacts of ocean acidification on sediment processes in shallow waters of the arctic ocean

description: Despite the important roles of shallow-water sediments in global biogeochemical cycling, the effects of ocean acidification on sedimentary processes have received relatively little attention. As high-latitude cold waters can absorb more CO2 and usually have a lower buffering capacity than warmer waters, acidification rates in these areas are faster than those in sub-tropical regions. The present study investigates the effects of ocean acidification on sediment composition, processes and sediment-water fluxes in an Arctic coastal system. Undisturbed sediment cores, exempt of large dwelling organisms, were collected, incubated for a period of 14 days, and subject to a gradient of pCO2 covering the range of values projected for the end of the century. On five occasions during the experimental period, the sediment cores were isolated for flux measurements (oxygen, alkalinity, dissolved inorganic carbon, ammonium, nitrate, nitrite, phosphate and silicate). At the end of the experimental period, denitrification rates were measured and sediment samples were taken at several depth intervals for solid-phase analyses. Most of the parameters and processes (i.e. mineralization, denitrification) investigated showed no relationship with the overlying seawater pH, suggesting that ocean acidification will have limited impacts on the microbial activity and associated sediment-water fluxes on Arctic shelves, in the absence of active bio-irrigating organisms. Only following a pH decrease of 1 pH unit, not foreseen in the coming 300 years, significant enhancements of calcium carbonate dissolution and anammox rates were observed. Longer-term experiments on different sediment types are still required to confirm the limited impact of ocean acidification on shallow Arctic sediment processes as observed in this study.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2014-07-22.
description: Supplement to: Gazeau, Frédéric; Van Rijswijk, P; Pozzato, L; Middelburg, Jack J (2014): Impacts of Ocean Acidification on Sediment Processes in Shallow Waters of the Arctic Ocean. PLoS ONE, 9(4), e94068
DOI: 10.1594/pangaea.818927
title: (Table 1) Organic carbon, bitumen, and bitumen components at DSDP Leg 64 Holes
DOI: 10.1594/pangaea.885444
title: Biomarkers of sediment core MD99-2284
DOI: 10.1594/pangaea.52676
title: (Table 1) Age model, carbon, alkenones, stable isotopes and calculated sea surface temperatures of sediment core 86014-12PC51
DOI: 10.1594/pangaea.823708
title: Relative concentrations of diene and triene highly branched isoprenoids in sediment core NBP00-03-MTC38C

description: These data were produced as part of the ERC ICEPROXY and French ANR CLIMICE projects within the scientific network of the ESF PolarClimate HOLOCLIP and FP7 PAST4FUTURE projects.
DOI: 10.1594/pangaea.900715
title: Palynology of sediment cores from site GS15-198-38
DOI: 10.1594/pangaea.914804
title: Pyropheophorbide of varved sediments from Lake Łazduny, NE Poland
DOI: 10.1594/pangaea.753642
title: (Table 2) Organic geochemistry of sediments from ODP Hole 112-688A
DOI: 10.1594/pangaea.936118
title: Seabed photographs taken along OFOS profile PS124_63-1 during POLARSTERN cruise PS124
DOI: 10.1594/pangaea.838211
title: Pollen profile ELGENNYA, Russia

description: This dataset was archived on 2014-11-03 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.838130
title: Pollen profile GYTGYKAI, Russia

description: This dataset was archived on 2014-11-03 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.936120
title: Seabed photographs taken along OFOS profile PS124_101-1 during POLARSTERN cruise PS124
DOI: 10.1594/pangaea.838105
title: Pollen profile CUTHILL1, United Kingdom

description: This dataset was archived on 2014-11-03 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.723121
title: Organic matter content in sediment samples along the gut of holothurians collected at a North-eastern Atlantic Abyssal Locality
DOI: 10.1594/pangaea.720996
title: Pigments of sediment core 13200-053, subcore 2
DOI: 10.1594/pangaea.217791
title: Biogeochemistry of sediment core CD84_5B
DOI: 10.1594/pangaea.217790
title: Biogeochemistry of sediment core CD84_3B
DOI: 10.1594/pangaea.783649
title: CNS-analysis from IODP Hole 333-C0011C

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.838078
title: Pollen profile CAMPING, Russia

description: This dataset was archived on 2014-11-03 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.58384
title: Biogeochemical parameters measured on sediment profile of multicorer SO118_MC-38
DOI: 10.1594/pangaea.757330
title: (Table 2) Steady state calculation of diffusion coefficient from ODP Hole 75-530A green and black shales

description: Detection limit of 0.01 ng/g used.
DOI: 10.1594/pangaea.52739
title: (Table 1) Alkenones, stable isotopes and calculated sea surface temperatures of sediment core KNO5103-0029GGC
DOI: 10.1594/pangaea.783481
title: CNS-analysis from IODP Hole 333-C0018A

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.174591
title: Geochemistry of sediment core IKU-6307/07-U-02
DOI: 10.1594/pangaea.838115
title: Pollen profile EK4, Russia

description: This dataset was archived on 2014-11-03 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.55883
title: Analysis of organic material in sediment core PL94-08 (Table 2)
DOI: 10.1594/pangaea.929918
title: Sea-ice biomarkers, benthic and planktonic foraminiferal abundance, and total organic carbon in Holocene sediments from outer Petermann Fjord, Greenland

description: Composite sediment core OD1507-03TC-41GC-03PC was collected at an average water depth of 976 m in outer Petermann Fjord during The Petermann 2015 Expedition to Petermann Fjord and adjacent Hall Basin in Nares Strait, northern Greenland. Previous results showed that the splice covers large parts of the Holocene, from the present to 6,900 cal yrs BP (Reilly et al. 2019). The core was sampled approximately every 5 cm for sea-ice related biomarker and total organic carbon (TOC) analyses and approximately every 10 cm for foraminiferal abundance counts. Where enough material was available, the depth of foraminiferal samples match the depth of biomarker samples. Sea-ice related biomarkers (IP25, HBI II, Brassicasterol, Cholesterol, Dinosterol, Campesterol, and β-sitosterol) where extracted using saponification (5% potassium hydroxide (KOH) in methanol (MeOH):H2O (9:1, v/v); 70°C, 1 h) followed by extraction of the non-saponifiable lipids into hexane (3 x 2 mL). After sample purification the different biomarkers were analysed on an Agilent 7890B GC fitted with an HP-5ms Ultra Inert column (30 m x 250 μm x 0.25 μm) coupled to a 5977A series mass selective detector and equipped with a Gerstel multipurpose sampler (MPS) at Aarhus University. TOC measurements and analysis of the carbon isotopic composition of the TOC were performed on 10 mg of the same sample material as for biomarker analyses. The samples were treated with 35% HCl prior to analyses, to remove inorganic carbon. The stable isotope δ13Corg and % wt TOC were measured using a continuous-flow IsoPrime IRMS coupled to an Elementar PyroCube elemental analyser at the Aarhus AMS Centre (AARAMS), Aarhus University, Denmark. Samples for foraminiferal abundance counts were wet sieved at 63 µm and counted wet, submerged in a 'storage' solution of 70 % distilled water and 30 % ethanol with baking soda to preserve fragile calcareous and agglutinated tests. A wet splitter was used when necessary to achieve a count of at least 200-300 benthic foraminifers.
DOI: 10.1594/pangaea.932826
title: Seabed photographs taken along OFOS profile PS124_21-7 during POLARSTERN cruise PS124
DOI: 10.1594/pangaea.785006
title: CNS-analysis from IODP Hole 333-C0012D

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.143701
title: Sedimentology and analysis of organic matter in core GIK17728-2
DOI: 10.1594/pangaea.887425
title: Biomarker content and total organic carbon of sediment core BP99-04/07
DOI: 10.1594/pangaea.896651
title: Organic carbon content and biomarkers of ODP Hole 151-911A
DOI: 10.1594/pangaea.57890
title: Isotopes, TOC, TN, CaCO3 and accumulation rate of sediment core GeoB4234-1
DOI: 10.1594/pangaea.838127
title: Pollen profile GOLUBOY, Russia

description: This dataset was archived on 2014-11-03 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.869928
title: (Appendix Xa) Coarse grain analysis of sediment core GIK18302-2
DOI: 10.1594/pangaea.54595
title: Geochemistry of sediment core PS2782-1
DOI: 10.1594/pangaea.869930
title: (Appendix XI) Coarse grain analysis of sediment core GIK18312-2
DOI: 10.1594/pangaea.949988
title: Alkane distribution in ancient permafrost deposits at the Batagay Megaslump, East Siberia

description: Paq: aquatic organic matter proxy based on n-alkanes.This dataset presents the alkane concentrations (range: n-C17 to n-C33) from 30 sediment samples which are given in µg/g sediment. Different alkane compounds were found: n-alkanes, alkylcyclohexanes, alkylcyclopentanes, methylalkanes, as well as diethylalkanes and ethyl-methylalkanes. Biomarker parameters include the concentrations of short-chain (n-C17 to n-C19) and long-chain (n-C20 to n-C33) n-alkanes, the average chain length of n-alkanes (ACL), the aquatic organic matter proxy based on n-alkanes (Paq) and the carbon preference index of n-alkanes (CPI). The alkanes were measured using a TRACE 1310 Gas Chromatograph coupled to a TSQ 9000 Mass Spectrometer (Thermo Scientific).
DOI: 10.1594/pangaea.746155
title: (Table 1) Hydrocarbon concentrations in ODP Hole 107-652A
DOI: 10.1594/pangaea.882255
title: Sedimentological and geochemical analyses of sediment core GeoB10817-4
DOI: 10.1594/pangaea.385556
title: Nucleic acids in sediment core 13200-032
DOI: 10.1594/pangaea.385552
title: Nucleic acids in sediment core 12930-075
DOI: 10.1594/pangaea.385558
title: Nucleic acids in sediment core 13368-026
DOI: 10.1594/pangaea.777618
title: Modern soil samples
DOI: 10.1594/pangaea.741030
title: Palynological estimation of ODP Hole 189-1172A
DOI: 10.1594/pangaea.720991
title: Pigments of sediment core 13077-069, subcore 1
DOI: 10.1594/pangaea.889147
title: Geochemical data of sediment core GeoB10831-3
DOI: 10.1594/pangaea.869933
title: (Appendix XIIc) Coarse grain analysis of sediment core GIK18298-2
DOI: 10.1594/pangaea.932581
title: Total organic carbon and IP25 of IODP Site 341-U1419
DOI: 10.1594/pangaea.855868
title: Biogeochemical measurements of sediments collected at station MSM15/1_487-1 in the Black Sea during the MSM15/1 cruise in 2010
DOI: 10.1594/pangaea.869926
title: (Appendix IX) Coarse grain analysis of sediment core GIK18302-2
DOI: 10.1594/pangaea.667643
title: (Table 1) Environment parameters of surface sediment samples from the Admiralty Bay, King George Island, West Antarctica
DOI: 10.1594/pangaea.743877
title: (Table 2) Organic and inorganic carbon chemistry of ODP Leg 103 samples
DOI: 10.1594/pangaea.107730
title: Organic geochemistry of sediment core PS2122-1
DOI: 10.1594/pangaea.836211
title: Alkenones and UK'37 derived SSTs of late MIS 6 to early MIS 5d section of ODP Site 161-975

description: Sediment depth is given in mcd.
DOI: 10.1594/pangaea.897420
title: Microphytobenthos fatty acids during a mesocosm experiment with addition of Palmaria decipiens and Desmarestia anceps to sediments from Potter Cove

description: C22:6(n-3) is a fatty acid that can be used as a biomarker for diatoms; fatty acids have been extracted from samples from core sediments.
DOI: 10.1594/pangaea.914859
title: (Annex 5) Rock-Eval pyrolysis results for samples from sediment core MD13-3455G
DOI: 10.1594/pangaea.57439
title: Analysis of organic material in sediment core PS2763-7
DOI: 10.1594/pangaea.819031
title: (Table 3) Microscopic, elemental analysis, and Rock-Eval pyrolysis at DSDP Holes 64-479 and 64-480
DOI: 10.1594/pangaea.72131
title: Gaschromatographic analysis of sediment core MD01-2462
DOI: 10.1594/pangaea.809298
title: (Table 1) Organic carbon and pyrolysis at DSDP Hole 77-535

description: Sediment depth is given in mbsf. Blanks in the pyrolysis columns indicate no analysis because organic carbon content was less than 0.5 wt.%.