cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.707276
title: Stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of DSDP Hole 79-545 (Appendix A)

description: Future warming is predicted to shift the Earth system into a mode with progressive increase and vigour of extreme climate events possibly stimulating other mechanisms that invigorate global warming. This study provides new data and modelling investigating climatic consequences and biogeochemical feedbacks that happened in a warmer world ~112 Myr ago. Our study focuses on the Cretaceous Oceanic Anoxic Event (OAE) 1b and explores how the Earth system responded to a moderate ~25,000 yr lasting climate perturbation that is modelled to be less than 1 °C in global average temperature. Using a new chronological model for OAE 1b we present high-resolution elemental and bulk carbon isotope records from DSDP Site 545 from Mazagan Plateau off NW Africa and combine this information with a coupled atmosphere-land-ocean model. The simulations suggest that a perturbation at the onset of OAE 1b caused almost instantaneous warming of the atmosphere on the order of 0.3 °C followed by a longer (~45,000 yr) period of ~0.8 °C cooling. The marine records from DSDP Site 545 support that these moderate swings in global climate had immediate consequences for African continental supply of mineral matter and nutrients (phosphorous), subsequent oxygen availability, and organic carbon burial in the eastern subtropical Atlantic, however, without turning the ocean anoxic. The match between modelling results and stratigraphic isotopic data support previous studies [summarized in Jenkyns 2003, doi:10.1098/rsta.2003.1240] in that methane emission from marine hydrates, albeit moderate in dimension, may have been the trigger for OAE 1b, though we can not finally rule out alternative mechanisms. Following the hydrate mechanism a total of 1.15 * 10**18 g methane carbon (delta13C=-60 per mil ), equivalent to about 10% to the total modern gas hydrate inventory, generated the delta13Ccarb profile recorded in the section. Modelling suggests a combination of moderate-scale methane pulses supplemented by continuous methane emission at elevated levels over ~25,000 yr. The proposed mechanism, though difficult to finally confirm in the geological past, is arguably more likely to occur in a warmer world and apparently perturbs global climate and ocean chemistry almost instantaneously. This study shows that, once set-off, this mechanism can maintain Earth's climate in a perturbed mode over geological time leading to pronounced changes in regional climate.
description: Supplement to: Wagner, Thomas; Wallmann, Klaus; Herrle, Jens O; Hofmann, Peter; Stuesser, Isabel (2007): Consequences of moderate ~25,000 yr lasting emission of light CO2 into the mid-Cretaceous ocean. Earth and Planetary Science Letters, 259(1-2), 200-211
DOI: 10.1594/pangaea.231275
title: Late Albian Col de Palluel (SE France, Niveau Breistroffer): results from palynomorphs
DOI: 10.1594/pangaea.957587
title: Various age models from sediment core MD01-2444 and IODP Site 339-U1385
DOI: 10.1594/pangaea.88777
title: Upper Aptian Pré-Guittard (Niveau Kilian) range chart in percentages of nannofossils in SE France

description: Method see Geisen et al, 1999, Micropaleontology. Volume: 1000 ml, high: 5 cm, field of view: 0.000227 cm**2
DOI: 10.1594/pangaea.872777
title: CLAM age model and biomes of sediment core Azzano_Decimo
DOI: 10.1594/pangaea.872787
title: CLAM age model and biomes of sediment core Fuquene
DOI: 10.1594/pangaea.872792
title: CLAM age model and biomes of sediment core Kamiyoshi_Basin
DOI: 10.1594/pangaea.919841
title: Alkenone sea surface temperatures Uk'37-SST from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3

description: Alkenone SST: Sediment samples (2.5 to 2.57 g) were freeze-dried and extracted by sonication using dichloromethane. The extracts were dried under nitrogen and hydrolysed with 7% potassium hydroxide in methanol. Extraction with hexane yielded a fraction enriched in neutral compounds, which was cleaned with ultra-pure water. The purified extracts were derivatised with BSTFA. Samples were injected diluted in toluene. They were then analysed with a Varian gas chromatograph Model 3400 equipped with a septum programmable injector and a flame ionisation detector. Absolute concentration errors were below 10%. Reproducibility tests showed that the uncertainty in the Uk'37 determinations was lower than 0.015 (ca. ±0.5ºC). The SST reconstruction (Uk'37-SST) was obtained from the relative composition of C37 unsaturated alkenones [Uk'37 = C37:2/(C37:2+C37:3)], using the calibration equation Uk'37 = 0.033*SST+0.044. The record was generated by B. Martart and J.O. Grimalt.Age model: The age model was developed by aligning the abrupt transitions of d18O record of G. bulloides in core MD01-2444 to warming and cooling events in the NGRIP d18Oice record, presented on: (i) the GICC05 timescale [Svensson, A. et al. A 60,000 year Greenland stratigraphic ice core chronology. Clim. Past 4, 47–57 (2008)]; and (ii) the WD2014: modified timescale, whereby NGRIP GICC05 ice ages 31.2–67.2 ka are multiplied by 1.0063. [Buizert, C. et al. The WAIS Divide deep ice core WD2014 chronology – Part 1: Methane synchronization (68–31 ka BP) and the gas age–ice age difference. Clim. Past 11, 153-173 (2015)].
DOI: 10.1594/pangaea.737903
title: Chlorophyll a concentrations measured on water samples of station PotterCove_1 at Potter Cove, King George Island, Western Antarctic Peninsula in 1996
DOI: 10.1594/pangaea.872805
title: CLAM age model and biomes of sediment core Little_Lake
DOI: 10.1594/pangaea.770446
title: Chlorophyll a concentrations measured on water samples of Station PotterCove_2 at Potter Cove, King George Island, Western Antarctic Peninsula in 2000
DOI: 10.1594/pangaea.821647
title: Layering experiment with 3 g/m**3 silt concentration
DOI: 10.1594/pangaea.738905
title: Pollen profile VACC3, Vaccarès, France

description: The EPD (http://www.europeanpollendatabase.net) accepted species name is given in the parameter comment. This dataset was archived on 2010-05-11 from the EPD database.
DOI: 10.1594/pangaea.949217
title: Raw data of physical oceanography and current velocity from mooring AK3-1 in the Arctic Ocean in 2015-2018

description: Time series data of physical oceanography (seawater conductivity, temperature, pressure, salinity) and ocean current velocities were obtained from mooring AK3 in the eastern Arctic Ocean north of Severnaya Zemlya (81.962 °N, 94.543 °W, water depth 1453 m) in 2015 - 2018. The mooring was deployed during Akademik Tryoshnikov expedition AT2015 as part of the NSF-funded NABOS (Nansen and Amundsen Basins Observational System) - program and recovered during AT2018, which was jointly organized between NABOS and the German BMBF-funded CATS (Changing Arctic Transpolar System)-project. The attached archive contains raw data files of Seabird SBE37 microcats, Seabird SBE26 bottom pressure recorders, RDI Acoustic Doppler Current profiler and Aanderaa point current meters. Auxiliary information such as sensor calibration sheets, mooring diagrams and schedule files are also provided, if applicable.
description: The file AK3.zip includes all available sensor raw data and the drawings from mooring AK3. The structure of the unzipped folders is mooring&gt;sensor/sampler type-&gt;serial number-&gt;instrument files. All instruments were synched to UTC before deployment, and the offset after the recovery is supplied in the respective instrument folder, if available. The archive also contains the sensor calibration sheets/files and relevant sampler schedule files, if available. Finally, mooring schematics are also attached as pdfs in the root folder. The file Moorings_AK_2015-2018.xlsx includes the metadata of all moorings that were deployed during AT2015 and recovered during AT2018.The authors are grateful to the captains, crews and technical/scientific staff of the expeditions. Many individuals have contributed to the conception of the research, the preparation of the instruments, the deployment and recoveries, as well as to the retrieval of the data, which we greatly acknowledge.
DOI: 10.1594/pangaea.860493
title: Calcium carbonate and organic carbon content, and stable carbon isotope record of organic carbon of IODP Hole 342-U1403A
DOI: 10.1594/pangaea.872815
title: CLAM age model and biomes of sediment core Navarres
DOI: 10.1594/pangaea.872809
title: CLAM age model and biomes of sediment core MD84-629
DOI: 10.1594/pangaea.88780
title: Aptian-Albian stable isotope records from the Mazagan Plateau, DSDP Site 545

description: Depth is given in mbsf
DOI: 10.1594/pangaea.88797
title: Lower Albian LArboudeysse (Niveau Paquier) range chart in percentages of nannofossils, in SE France

description: Method see Geisen et al, 1999, Micropaleontology
DOI: 10.1594/pangaea.88803
title: Stable isotope record of profile Pré-Guittard in SE France
DOI: 10.1594/pangaea.88805
title: Stable isotope record of profile Tarendol in SE France
DOI: 10.1594/pangaea.77350
title: Upper Aptian Niveau Kilian range chart of nannofossils in SE France

description: C=common (&gt;1 specimen/field view); F=frequent (1 specimen/2-10 fields of view); R=rare (1 speciemen/&gt;11 fields of view)
DOI: 10.1594/pangaea.872816
title: CLAM age model and biomes of sediment core Pacucha
DOI: 10.1594/pangaea.770444
title: Chlorophyll a concentrations measured on water samples of Station PotterCove_2 at Potter Cove, King George Island, Western Antarctic Peninsula in 1998
DOI: 10.1594/pangaea.905472
title: Physical oceanography obtained from the water sampling bottle files collected during Akademik Tryoshnikov cruise AT2018 to the Arctic Ocean

description: RV "Akademik Tryoshnikov" left Arkhangelsk on August, 17 2018 and on August 22-30, observations in the western part of the Laptev Sea under the auspice of CATS/Transdrift program were carried out. Some additional stations were taken on September 4.There are 42 stations obtained from the bottle sampling files. Observations were taken by using a Seabird SBE911plus CTD system. This system measures conductivity, temperature, and pressure at a 24Hz sample rate. Pressure was measured by a Digiquartz® sensor with accuracy of ±0.015% of full-scale range. For temperature measurements an SBE 3T sensor was used with accuracy of 0.005°C. Conductivity was measured by an SBE 4C sensor with accuracy of 0.0003 S/m.This study was supported by the Russian Ministry of Science and Higher Education, project: RFMEFI61617X0076.
DOI: 10.1594/pangaea.872819
title: CLAM age model and biomes of sediment core Siberia1
DOI: 10.1594/pangaea.872778
title: CLAM age model and biomes of sediment core BANYOLES
DOI: 10.1594/pangaea.872782
title: CLAM age model and biomes of sediment core Caledonia_Fen
DOI: 10.1594/pangaea.986839
title: Magnetic data of profile MSM122_H16-2 over the Hayes transform fault, North Atlantic, of MARIA S. MERIAN cruise MSM122

description: During the cruise MSM122 of the German research vessel MARIA S. MERIAN, we recorded densely spaced magnetic field measurement over the Oceanographer and Hayes transform faults in the North Atlantic to the Southwest of the Azores and hence at segment boundries offseting the Mid-Atlantic Ridge. Additional data were recorded to the south of Hayes transform and on the transits to Halifax outside of any territorial water.The total magnetic field was measured using two SeaSpy magnetometers which were towed at 350 m and 450 m, respectively, behind the stern of the ship, sampling the data continuously every 2 seconds. The ships navigation was corrected to match the position of the first magnetic sensor at 350 m behind the vessel. Uncorrected total field magnetic data are available in text/ascii format.
DOI: 10.1594/pangaea.986840
title: Magnetic data of profile MSM122_SH17 to the south of Hayes transform fault, North Atlantic, of MARIA S. MERIAN cruise MSM122

description: During the cruise MSM122 of the German research vessel MARIA S. MERIAN, we recorded densely spaced magnetic field measurement over the Oceanographer and Hayes transform faults in the North Atlantic to the Southwest of the Azores and hence at segment boundries offseting the Mid-Atlantic Ridge. Additional data were recorded to the south of Hayes transform and on the transits to Halifax outside of any territorial water.The total magnetic field was measured using two SeaSpy magnetometers which were towed at 350 m and 450 m, respectively, behind the stern of the ship, sampling the data continuously every 2 seconds. The ships navigation was corrected to match the position of the first magnetic sensor at 350 m behind the vessel. Uncorrected total field magnetic data are available in text/ascii format.
DOI: 10.1594/pangaea.986842
title: Magnetic data of profile MSM122_SH19 to the south of Hayes transform fault, North Atlantic, of MARIA S. MERIAN cruise MSM122

description: During the cruise MSM122 of the German research vessel MARIA S. MERIAN, we recorded densely spaced magnetic field measurement over the Oceanographer and Hayes transform faults in the North Atlantic to the Southwest of the Azores and hence at segment boundries offseting the Mid-Atlantic Ridge. Additional data were recorded to the south of Hayes transform and on the transits to Halifax outside of any territorial water.The total magnetic field was measured using two SeaSpy magnetometers which were towed at 350 m and 450 m, respectively, behind the stern of the ship, sampling the data continuously every 2 seconds. The ships navigation was corrected to match the position of the first magnetic sensor at 350 m behind the vessel. Uncorrected total field magnetic data are available in text/ascii format.
DOI: 10.1594/pangaea.986844
title: Magnetic data of profile T20 recorded during the transit of MARIA S. MERIAN cruise MSM122

description: During the cruise MSM122 of the German research vessel MARIA S. MERIAN, we recorded densely spaced magnetic field measurement over the Oceanographer and Hayes transform faults in the North Atlantic to the Southwest of the Azores and hence at segment boundries offseting the Mid-Atlantic Ridge. Additional data were recorded to the south of Hayes transform and on the transits to Halifax outside of any territorial water.The total magnetic field was measured using two SeaSpy magnetometers which were towed at 350 m and 450 m, respectively, behind the stern of the ship, sampling the data continuously every 2 seconds. The ships navigation was corrected to match the position of the first magnetic sensor at 350 m behind the vessel. Uncorrected total field magnetic data are available in text/ascii format.
DOI: 10.1594/pangaea.986845
title: Magnetic data of profile T21 recorded during the transit of MARIA S. MERIAN cruise MSM122

description: During the cruise MSM122 of the German research vessel MARIA S. MERIAN, we recorded densely spaced magnetic field measurement over the Oceanographer and Hayes transform faults in the North Atlantic to the Southwest of the Azores and hence at segment boundries offseting the Mid-Atlantic Ridge. Additional data were recorded to the south of Hayes transform and on the transits to Halifax outside of any territorial water.The total magnetic field was measured using two SeaSpy magnetometers which were towed at 350 m and 450 m, respectively, behind the stern of the ship, sampling the data continuously every 2 seconds. The ships navigation was corrected to match the position of the first magnetic sensor at 350 m behind the vessel. Uncorrected total field magnetic data are available in text/ascii format.
DOI: 10.1594/pangaea.931875
title: Steric height and bottom pressure water equivalent derived from mooring data at the Laptev Sea continental slope

description: This dataset has been created as a comparative dataset for assessment of satellite-derived sea level anomaly in the publication Doglioni et al. (2022). The dataset includes two time series, one of steric height and another of bottom pressure equivalent height, respectively computed from moored temperature and salinity data and ocean bottom pressure records at the Laptev Sea continental slope. Data were collected between September 2013 and August 2015 in the framework of the project Nansen and Amundsen Basins Observations System II (NABOS-II moorings M1_4 and M1_6, Polyakov et al., 2019). Temperature and salinity were linearly interpolated between the shallowest sensor (26 m) and the deepest sensor (700 m) onto a regular pressure grid with vertical spacing of 2 m. Constant extrapolation was performed above the shallowest sensor and no extrapolation was performed below the deepest sensor. Temperature and salinity vertical profiles were converted into density profiles using the Matlab sw_dens routine (Fofonoff & Millard, 1983). Bottom pressure records are detided using the Matlab routine t_tide (Pawlowicz et al., 2002) and instrumental drifts were removed. Steric height and bottom pressure equivalent height time series were averaged into monthly time steps.
DOI: 10.1594/pangaea.931878
title: Steric height and bottom pressure water equivalent derived from mooring data at the shelf break north of the Arctic Cape

description: This dataset has been created as a comparative dataset for assessment of satellite-derived sea level anomaly in the publication Doglioni et al. (2022). The dataset includes two time series, one of steric height and another of bottom pressure equivalent height, respectively computed from moored temperature and salinity data and ocean bottom pressure records at the Arctic Cape shelf break. Data were collected between October 2015 and July 2018 in the framework of the project Changing Arctic Transpolar System (CATS mooring AK3). Temperature and salinity were linearly interpolated between the shallowest sensor (50 m) and the deepest sensor (1448 m) onto a regular pressure grid with vertical spacing of 2 m. Constant extrapolation was performed above the shallowest sensor and no extrapolation was performed below the deepest sensor. Temperature and salinity vertical profiles were converted into density profiles using the Matlab sw_dens routine (Fofonoff & Millard, 1983). Bottom pressure records are detided using the Matlab routine t_tide (Pawlowicz et al., 2002) and instrumental drifts were removed. Steric height and bottom pressure equivalent height time series were averaged into monthly time steps.
DOI: 10.1594/pangaea.755146
title: Suspended particulate matter measured on water samples of station PotterCove_3 at Potter Cove, King George Island, Western Antarctic Peninsula in 2008
DOI: 10.1594/pangaea.755147
title: Suspended particulate matter measured on water samples of station PotterCove_3 at Potter Cove, King George Island, Western Antarctic Peninsula in 2009
DOI: 10.1594/pangaea.317308
title: Current meter data at station ACM4_BEST_2 (CMDB code rcm00994)
DOI: 10.1594/pangaea.317317
title: Current meter data at station ACM4_BEST_4 (CMDB code rcm01003)
DOI: 10.1594/pangaea.770401
title: Chlorophyll a concentrations measured on water samples of Station PotterCove_1 at Potter Cove, King George Island, Western Antarctic Peninsula in 2000
DOI: 10.1594/pangaea.872802
title: CLAM age model and biomes of sediment core Lake_Tulane
DOI: 10.1594/pangaea.770404
title: Chlorophyll a concentrations measured on water samples of Station PotterCove_1 at Potter Cove, King George Island, Western Antarctic Peninsula in 2003
DOI: 10.1594/pangaea.869352
title: Physical oceanography at CTD stations of three transects in Potter Cove in 1996 and 1997
DOI: 10.1594/pangaea.770454
title: Chlorophyll a concentrations measured on water samples of Station PotterCove_2 at Potter Cove, King George Island, Western Antarctic Peninsula in 2009
DOI: 10.1594/pangaea.869360
title: Physical oceanography at CTD station PotterCove_2 in 2006
DOI: 10.1594/pangaea.927281
title: Microstructure measurements raw data during Akademik Tryoshnikov cruise AT2018 to the Arctic Ocean

description: Shipboard loosely-tethered free-falling microstructure (MSS) measurements were carried out during expedition Transdrift-XXIV to the eastern Arctic Ocean onboard the Akademik Tryoshnikov (AT2018). The expedition was jointly organized between the US-Russian NABOS (Nansen and Amundsen Basin Observational System), the German-Russian CATS (Changing Arctic Transpolar System, funded by BMBF), and the TICE-project funded by the Alfred-Wegener-Institute. 236 stations were carried out between 25 August and 23 September 2018. The profiler MSS90L manufactured by Sea and Sun Technology samples at 1024 Hz and was equipped with temperature, salinity, shear, and fluorescence sensors.
DOI: 10.1594/pangaea.949221
title: Raw data of physical oceanography and current velocity from mooring AK7-1 in the Arctic Ocean in 2015-2018

description: Time series data of physical oceanography (seawater conductivity, temperature, pressure, salinity) and ocean current velocities were obtained from mooring AK7 in the eastern Arctic Ocean north of Severnaya Zemlya (82.577 °N, 95.513 °W, water depth 3019 m) in 2015 - 2018. The mooring was deployed during Akademik Tryoshnikov expedition AT2015 as part of the NSF-funded NABOS (Nansen and Amundsen Basins Observational System) - program and recovered during AT2018, which was jointly organized between NABOS and the German BMBF-funded CATS (Changing Arctic Transpolar System)-project. The attached archive contains raw data files of Seabird SBE37 microcats, Seabird SBE26 bottom pressure recorders, RDI Acoustic Doppler Current profiler and Aanderaa point current meters. Auxiliary information such as sensor calibration sheets, mooring diagrams and schedule files are also provided, if applicable.
description: The file AK7.zip includes all available sensor raw data and the drawings from mooring AK7. The structure of the unzipped folders is mooring&gt;sensor/sampler type-&gt;serial number-&gt;instrument files. All instruments were synched to UTC before deployment, and the offset after the recovery is supplied in the respective instrument folder, if available. The archive also contains the sensor calibration sheets/files and relevant sampler schedule files, if available. Finally, mooring schematics are also attached as pdfs in the root folder. The file Moorings_AK_2015-2018.xlsx includes the metadata of all moorings that were deployed during AT2015 and recovered during AT2018.The authors are grateful to the captains, crews and technical/scientific staff of the expeditions. Many individuals have contributed to the conception of the research, the preparation of the instruments, the deployment and recoveries, as well as to the retrieval of the data, which we greatly acknowledge.
DOI: 10.1594/pangaea.672319
title: Water temperature profiles from 174 XBT drops along the track of POLARSTERN cruise ANT-V/2
DOI: 10.1594/pangaea.737896
title: Suspended particulate matter measured on water samples of station PotterCove_2 at Potter Cove, King George Island, Western Antarctic Peninsula in 1994