cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.57844
title: BioSil indet, CaCO3 and TOC data of sediment core MD96-2086

description: Concentration and mass accumulation rate profiles from Southeastern Atlantic sediment cores located off Namibia show that an exceptional episode in benthic carbonate dissolution occurred during early glacial isotope stage 6 (substages 6.6 and 6.5) between about 186 000 and 170 000 yr BP. Although this episode is restricted to or is more pronounced in this region than in other areas of the Atlantic Ocean, its exceptional character with respect to older and younger climatic episodes at the same site cannot be fully explained by local factors alone, but requires a combination of local and global influences. The onset of the carbonate dissolution episode is related to a more efficient transfer of organic matter from surface eutrophic areas to the lower and is due to low sea level, while its termination relates to a change in either global ocean alkalinity or bottom water circulation. An evaluation of the magnitude of this local carbonate dissolution episode suggests that its contribution to a global alkalinity change may have been significant. Carbonate dissolution was probably amplified by stronger upwelling activity of the Benguela System linked to an exceptional northern excursion of the boreal summer ITCZ during early glacial isotope stage 6. This low latitude global linkage may explain how this carbonate dissolution event as well as other 'anomalies' observed for early stage 6, like an important Dole effect minimum or a 'cold' Mediterranean sapropel, are related.
description: Supplement to: Bertrand, Philippe; Giraudeau, Jacques; Malaizé, Bruno; Martinez, Philippe; Gallinari, Morgane; Pedersen, Thomas F; Pierre, Catherine; Vénec-Peyré, Marie-Thérèse (2002): Occurrence of an exceptional carbonate dissolution episode during early glacial isotope stage 6 in the Southeastern Atlantic. Marine Geology, 180(1-4), 235-248
DOI: 10.1594/pangaea.58185
title: Grain size composition of sediments from Hole 81-552A
DOI: 10.1594/pangaea.57970
title: Color scan of sediment core PS2178-3

description: resolution 600 dpi, size: 1 MB, format: pdf
DOI: 10.1594/pangaea.58044
title: (Table T1) Stratigraphic occurence and relative abundances of diatom taxa from the Pliocene and Pleistocene of ODP Site 117-1089

description: Abundance: D = dominant &gt;60%, A = abundant 30-60, C = common 15-30, F = few 3-15, R = rare &lt;3, T = trace, X = present, - = none. Preservation: G = good, M = moderate, P = poor
DOI: 10.1594/pangaea.57673
title: List of undersea feature names with geographical coordinates, International Hydrographic Organization, Monaco
DOI: 10.1594/pangaea.58045
title: (Table T2) Stratigraphic occurence and relative abundances of diatom taxa from the Pliocene and Pleistocene of ODP Site 177-1090

description: Abundance: D = dominant &gt;60%, A = abundant 30-60, C = common 15-30, F = few 3-15, R = rare &lt;3, T = trace, X = present, - = none. Preservation: G = good, M = moderate, P = poor
DOI: 10.1594/pangaea.57494
title: Table 5 Comparison of surface elevations by Seasat and optical survey along EGIG line

description: Surface elevation maps of the southern half of the Greenland subcontinent are produced from radar altimeter data acquired by the Seasat satellite. A summary of the processing procedure and examples of return waveform data are given. The elevation data are used to generate a regular grid which is then computer contoured to provide an elevation contour map. Ancillary maps show the statistical quality of the elevation data and various characteristics of the surface. The elevation map is used to define ice flow directions and delineate the major drainage basins. Regular maps of the Jakobshavns Glacier drainage basin and the ice divide in the vicinity of Crete Station are presented. Altimeter derived elevations are compared with elevations measured both by satellite geoceivers and optical surveying.
description: Supplement to: Bindschadler, Robert A; Zwally, H Jay; Major, Judith A; Brenner, Anita C (1989): Surface topography of the Greenland ice sheet from satellite radar altimetry. NASA Technical Report, Goddard Space Flight Center, National Aeronautics and Space Administration, Office of Management, NASA-SP-503, 127 pp
DOI: 10.1594/pangaea.57434
title: Meteorology at station P3 in 1997
DOI: 10.1594/pangaea.58046
title: (Table T3) Stratigraphic occurence and relative abundances of diatom taxa from the Pliocene and Pleistocene of ODP Site 177-1091

description: Abundance: D = dominant &gt;60%, A = abundant 30-60, C = common 15-30, F = few 3-15, R = rare &lt;3, T = trace, X = present, - = none. Preservation: G = good, M = moderate, P = poor
DOI: 10.1594/pangaea.58047
title: (Table T4) Stratigraphic occurence and relative abundances of diatom taxa from the Pliocene and Pleistocene of ODP Site 177-1092

description: Abundance: D = dominant &gt;60%, A = abundant 30-60, C = common 15-30, F = few 3-15, R = rare &lt;3, T = trace, X = present, - = none. Preservation: G = good, M = moderate, P = poor
DOI: 10.1594/pangaea.57433
title: MADAM.meteorology 1996
DOI: 10.1594/pangaea.57166
title: PKDB9274
DOI: 10.1594/pangaea.57167
title: PKDB6568
DOI: 10.1594/pangaea.57168
title: PKDB123366
DOI: 10.15468/dl.mwg5x6
title: Occurrence Download

description: A dataset containing 778 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is China",
 "GadmGid is one of (CHN.2_1, CHN.2.1_1, CHN.2.1.1_1)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Circus cyaneus (Linnaeus, 1766)",
 "Year 2020-2024"
 ]
}

 The dataset includes 778 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0031664-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.57169
title: PKDB83397
DOI: 10.1594/pangaea.57296
title: Density of ice core ngt27C94.2 from the North Greenland Traverse
DOI: 10.1594/pangaea.56898
title: PKDB162177
DOI: 10.1594/pangaea.57220
title: GISP2 Automatic Weather Station Daily Averages

description: AWS data from 1987-1995 for stations distributed on and around GISP2. Data received by satellite and accumulated by ARGOS before being transmitted to Univ of Wisconsin-Madison for processing. Daily averages created from the original 3 hour files.
DOI: 10.1594/pangaea.57630
title: Calcium carbonate content from DSDP Hole 81-552A in the northeastern Atlantic Ocean

description: ash layer at 12.20 m
DOI: 10.1594/pangaea.57226
title: GISP2 Laser Light Scattering in high resolution from meltwater

description: Measured from meltwater to obtain particle concentration along the shallow portions of the core (&lt;1650 m) before it was replaced by LLS from solid core.
DOI: 10.1594/pangaea.57235
title: Core derived downhole logs for holes CRP-2 and CRP-2A

description: In the northern McMurdo Sound (Ross Sea, Antarctica), the CRP-2/2A drillhole targeted the western margin of the Victoria Land Basin to investigate Neogene to Palaeogene climatic and tectonic history by obtaining continuous core and downhole logs. Well logging of CRP-2/2A has provided a complete and comprehensive dataset of in situ geophysical measurements. This paper describes the evaluation and interpretation of the downhole logging data using multivariate statistical methods. Two major types of multivariate statistical methods were each yielding a different perspective: (1) Factor analysis was used as an objective tool for classification of the drilled sequence based on physical and chemical properties. The factor logs are mirroring the basic geological controls (i.e., grain size, porosity, clay mineralogy) behind the measured geophysical properties, thereby making them easier to interpret geologically. (2) Cluster analysis of the logs groups similar downhole geophysical properties into one cluster, delineating individual logging or sedimentological units. These objectively and independently defined units, or statistical electrofacies, are helpful in differentiating lithological and sedimentological characterisations (e.g. grain size, provenance). The multivariate statistical methods of factor and cluster analysis proved to be powerful tools for fast, reliable, and objective characterisation of downhole geophysical properties at CRP-2/2A, resulting in interpretations which are consistent with sedimentological findings.
description: Supplement to: Bücker, Christian J; Jarrard, Richard D; Wonik, Thomas; Brink, Jason (2000): Analysis of downhole logging data from CRP-2/2A, Victoria Land Basin, Antarctica: a multivariate statistical approach. Terra Antartica, 7(3), 299-310
DOI: 10.1594/pangaea.57219
title: GISP2 Automatic Weather Station Cathy Daily Averages

description: AWS data from 1987-1995 for stations distributed on and around GISP2. Data received by satellite and accumulated by ARGOS before being transmitted to Univ of Wisconsin-Madison for processing. Daily averages created from the original 3 hour files.
DOI: 10.1594/pangaea.57221
title: GISP2 Automatic Weather Station Julie Daily Averages

description: AWS data from 1987-1995 for stations distributed on and around GISP2. Data received by satellite and accumulated by ARGOS before being transmitted to Univ of Wisconsin-Madison for processing. Daily averages created from the original 3 hour files.
DOI: 10.1594/pangaea.57222
title: GISP2 Automatic Weather Station Kenton Daily Averages

description: AWS data from 1987-1995 for stations distributed on and around GISP2. Data received by satellite and accumulated by ARGOS before being transmitted to Univ of Wisconsin-Madison for processing. Daily averages created from the original 3 hour files.
DOI: 10.1594/pangaea.57223
title: GISP2 Automatic Weather Station Klinck Daily Averages

description: AWS data from 1987-1995 for stations distributed on and around GISP2. Data received by satellite and accumulated by ARGOS before being transmitted to Univ of Wisconsin-Madison for processing. Daily averages created from the original 3 hour files.
DOI: 10.1594/pangaea.56536
title: Monthly carbon dioxide measurements on Mauna Loa, Hawaii from 1958 to 1998
DOI: 10.1594/pangaea.57224
title: GISP2 Automatic Weather Station Matt Daily Averages

description: AWS data from 1987-1995 for stations distributed on and around GISP2. Data received by satellite and accumulated by ARGOS before being transmitted to Univ of Wisconsin-Madison for processing. Daily averages created from the original 3 hour files.
DOI: 10.1594/pangaea.56574
title: Time series of monthly mean air temperature from 1856 to 1999
DOI: 10.1594/pangaea.57007
title: (Table 4) Paleomagnetic datums of ODP Hole 114-600A

description: C6BR/C6CN, 23.27 Ma is truncated by hiatus, therefore older than 23.27 Ma
DOI: 10.1594/pangaea.57008
title: (Table 1) Ages and depths of polarity reversal boundaries of ODP Site 114-701
DOI: 10.1594/pangaea.56138
title: Clay and smectite analysis of sediment core CRP-2A

description: Sediments of the CRP-2/2A drill core from the continental shelf of McMurdo Sound in Ross Sea, Pacific sector of the Southern Ocean, have been investigated for their clay mineral assemblages, especially for the smectite contents and smectite crystallinities. Highest smectite amounts and best crystallinities occur in three intervals below 485 mbsf in CRP-2/2A. They indicate deposition of sediments during a time when chemical weathering was active on large ice-free areas on the nearby Antarctic continent. In he upper part of the core, smectite contents are much lower and crystallinities are worse. This clay mineral composition indicates deposition of sediments during a time when physical weathering prevailed on an ice-covered continent. At deep-sea sites around Antarctica the shift from smectite-dominated to smectite-poor and illite-rich assemblages is well dated as earliest Oligocene, 33.9-33.1 Ma, and documents the onset of continental glaciation in East Antarctica. At CIROS-1 a corresponding shift in the clay mineralogy was observed at a depth of 425-445 mbsf.
description: Supplement to: Ehrmann, Werner (2000): Smectite content and crystallinity in sediments from CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 575-580
DOI: 10.1594/pangaea.56369
title: (Table 2) Age model of sediment core W8402A-14
DOI: 10.1594/pangaea.56097
title: ATM Concentration of H2O2 in atmosphere
DOI: 10.1594/pangaea.56099
title: GISP2 Concentration of H2O2 in surface snow

description: Samples were collected from the top few millimeters of snow from a 10 x 10 cm area. Samples were generally melted and analyzed within 1 to 3 hours after collection. Analysis was by the peroxidase method of Sigg et al. (1992).
DOI: 10.1594/pangaea.57018
title: (Table 4) Age model of ODP Hole 114-699A

description: Repeated entries in DEPTH signify hiatuses. Hiatus at 11.17 mbsf between 1.20 and 1.66 Ma. 64.64 mbsf inn C3AR, but younger than 6.00 Ma based on correlation to Hole 114-704B. 66.59 mbsf sample is middle Miocene, probably lower Nitzschia denticuloides Zone.
DOI: 10.1594/pangaea.56559
title: Monthly values of the North Atlantic Oscillation Index from 1821 to 2000

description: Early instrumental pressure measurements from Gibraltar and the Reykjavik area of Iceland have been used to extend to 1821 the homogeneous pressure series at the two locations. In winter the two sites are located close to the centres of action that comprise the North Atlantic Oscillation (NAO). The extended 'winter half-year' record of the NAO enables recent changes in the record to be placed in the context of the period 1823–1996. The period since the early 1970s is the most prolonged positive phase of the oscillation and the late 1980s and early 1990s is the period with the highest values (strongest westerlies). The winter of 1995–1996 marked a dramatic switch in the index, with the change from 1994–1995 being the greatest change recorded from one year to the next since the series began in 1823. (The extended Gibraltar and Reykjavik monthly pressures and the NAO series can be found on the Climatic Research Unit home page, http://www.cru.uea.ac.uk/).
description: The North Atlantic Oscillation (NAO) is defined as the normalized pressure difference between a station on the Azores and one on Iceland. NOA is one of the major modes of variability of the Northern Hemisphere atmosphere. It is particularly important in winter, when it exerts a strong control on the climate of the Northern Hemisphere. It is also the season that exhibits the strongest interdecadal variability. For winter, the difference between the normalised sea level pressure over Gibraltar and the normalised sea level pressure over Southwest Iceland is a useful index of the strength of the NAO. Jones et al. (1997) used early instrumental data to extend this index back to 1823.
description: Supplement to: Jones, Philip D; Jonsson, T; Wheeler, Dennis A (1997): Extension to the North Atlantic Oscillation using early instrumental pressure observations from Gibraltar and South-West Iceland. International Journal of Climatology, 17(13), 1433-1450
DOI: 10.1594/pangaea.56560
title: Density of ice core ngt03C93.2 from the North Greenland Traverse
DOI: 10.1594/pangaea.56563
title: Monthly Southern Oscillation Index from 1866 to 1997

description: The SOI is defined as the normalized pressure difference between Tahiti and Darwin. There are several slight variations in the SOI values calculated at various centres. Here we calculate the SOI based on the method given by Ropelewski and Jones (1987). The reader is also referred to Allan et al. (1991) and Können et al. (1998) for details of the early pressure sources and methods used to compile the series from 1866 onwards.
DOI: 10.1594/pangaea.56566
title: Geochemistry of sediment core STK8
DOI: 10.1594/pangaea.56615
title: Density of ice core ngt14C93.2 from the North Greenland Traverse
DOI: 10.1594/pangaea.55713
title: Physical properties of sediment core CRP-2A

description: In this paper the relationship between whole-core compressional wave velocities and gamma-ray attenuation porosities of sediments cored at CRP-2/2A is examined, and compared with results from CRP-1, CRP-2/2A core-plug samples, and global models for velocity/porosity relationships of marine sediments. The high degree of data scatter observed in the velocity/porosity relationship of CRP-1 core is even larger in CRP-2/2A core. The general pattern of the velocity/porosity relationship is similar in CRP-2/2A whole core and core plug measurements. Despite scatter, all data indicate a strong primary dependence of velocity on porosity. This relationship appears to be independent of lithology except for sections with zero porosity and porosity &gt;0.6, which are attributed to large lonestones and lapillistones, respectively. Core velocity/porosity patterns of CRP-1 and CRP-2/2A are very similar for sediments from the same age interval (19-23 Ma), both characterized by relatively low velocities (mostly between 2 and 3 km s-1) compared to porosity (0.1 - 0.4). Within this range of porosity, core velocities increase significantly up to more than 4 km s-1 below ca 440 mbsf. The change in the velocity/porosity relationship as a function of core depth is attributed to down-core increase in intergrain coupling enhanced by carbonate cementation. This is confirmed by a positive correlation of carbonate content with velocities higher or lower than empirically predicted from porosity. After removing first-order compaction control from the whole-core porosity record, no significant control by clay content can be identified (R = 0.3). This is different to the results for core from CRP-1 (R = 0.6) which is not cemented.
description: Supplement to: Niessen, Frank; Kopsch, Conrad; Polozek, Kerstin (2000): Velocity and porosity from CRP-2/2A core logs, Victoria Land Basin, Antarctica. Terra Antartica, 7(3), 241-253
DOI: 10.1594/pangaea.56135
title: Analysis of macerals in sediment core 159-959C

description: Organic petrologic and geochemical analyses were performed on modern and Quaternary organic carbon-poor deep sea sediments from the Equatorial Atlantic. The study area covers depositional settings from the West African margin (ODP Site 959) through the Equatorial Divergence (ODP Site 663) to the pelagic Equatorial Atlantic. Response of organic matter (OM) deposition to Quaternary climatic cycles is discussed for ODP Sites 959 and 663. The results are finally compared to a concept established for fossil deep sea environments [Littke and Sachsenhofer, 1994 doi:10.1021/ef00048a041]. Organic geochemical results obtained from Equatorial Atlantic deep sea deposits provide new aspects on the distribution of sedimentary OM in response to continental distance, atmospheric and oceanographic circulation, and depositional processes controlling sedimentation under modern and past glacial–interglacial conditions. The inventory of macerals in deep sea deposits is limited due to mechanical breakdown of particles, degree of oxidation, and selective remineralization of labile (mostly marine) OM. Nevertheless, organic petrology has a great potential for paleoenvironmental studies, especially as a proxy to assess quantitative information on the relative abundance of marine vs. terrigenous OM. Discrepancies between quantitative data obtained from microscopic and isotopic (delta13Corg) analyses were observed depending on the stratigraphic level and depositional setting. Strongest offset between both records was found close to the continent and during glacial periods, suggesting a coupling with wind-born terrigenous OM from central Africa. Since African dust source areas are covered by C4 grass plants, supply of isotopically heavy OM is assumed to have caused the difference between microscopic and isotopic records.
description: Supplement to: Wagner, Thomas (1999): Petrology of organic matter in modern and Late Quaternary deposits of the equatorial Atlantic. International Journal of Coal Geology, 39(1-3), 155-184
DOI: 10.1594/pangaea.56090
title: GISP2-D Borehole Diameter

description: Depth=TVD true vertical depth. The diameter of the 3-km borehole (GISP-D) at the GISP2 site was measured during 1993, 1994, and 1995 using University of Copenhagens geophysical logging system (UCPH); the UCPH logging system is described in Gundestrup et al.(1994).
DOI: 10.1594/pangaea.56093
title: GISP2 Methane Concentrations

description: Ice ages were calculated by linear interpolation from the Meese et al. timescale. Depth is midpoint of sample.
DOI: 10.1594/pangaea.56095
title: GISP2 D-core methane sulfonic acid concentrations
DOI: 10.1594/pangaea.56096
title: GISP2 F-core methane sulfonic acid concentrations
DOI: 10.1594/pangaea.56189
title: Thorium 234 measured on water bottle samples from the upper 100 m
DOI: 10.1594/pangaea.56109
title: Occurence of Miocene foraminifera species in sediment core CRP-1 (Table 1)
DOI: 10.1594/pangaea.55840
title: Relative clay mineral abundances of sediment core GeoB2821-1
DOI: 10.1594/pangaea.56110
title: Occurence of macrofossils in the carbonate-rich unit of sediment core CRP-1 (Table 1, 2, 3)

description: Macrofossils are a significant component of biogenic carbonate sediments in the Quaternary section of the CRP-1 drillhole, Cape Roberts, Victoria Land Basin. The middle Pleistocene macrofossil assemblages contain more than 60 taxa (probably up to 80) belonging to molluscs (&gt;40), bryozoans (&gt;14), polychaetes (3), octocorals (1), echinoids (1), brachiopods (1), and scalpellid cirripeds (1). Taxa determined at the species level are all known from the present day Ross Sea and permit reconstruction of the palaeoenvironment in some detail. At the time of deposition of the carbonate-rich unit. Roberts Ridge was a bank 100 m deep or more, with a particulate bottom under the influence of weak bottom currents. The CRP-1 assemblages represent the richest and most diverse fossil macrofauna hitherto recorded from the Pleistocene of Antarctica.
description: Supplement to: Taviani, Marco; Beu, A; Lombardi, Chiara (1998): Pleistocene macrofossils from CRP-1 Drillhole, Victoria Land Basin, Antarctica. Terra Antartica, 5(3), 485-491
DOI: 10.1594/pangaea.56111
title: Occurence of foraminifera in sediment core CRP-1 (Table 1)
DOI: 10.1594/pangaea.56119
title: Bulk weight, density, porosity of sediment core MD99-2341
DOI: 10.1594/pangaea.55533
title: GISP2 Ions: Deep (D) Core (Detailed)

description: GISP2 major ion concentrations in parts per billion (ppb) by mass. Blanks in chemical species represent samples below detection limits. Firn samples were cleaned in the freezer by hand scraping and placed in a pre-cleaned container. The pieces were kept frozen until analyzed. Samples from 96 meters to 200 meters were cleaned by rinsing with milli-Q water. Samples below 200 meters were cleaned by hand scraping after sectioning.