cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/twm7-pf61
title: NOAA/WDS Paleoclimatology - Lake Kalliojärvi, Finland 4,000 Year Varve Thickness Data

description: Clastic-organic varved sediments from the boreal Lake Kalliojärvi, Central Finland, record changes in snow accumulation for more than 4000 years. The varve record was reconstructed using digital image analysis from 4132 varve yr BP to present with 2.2% counting error and is supported by paleomagnetic data. Two laminae are identified in a typical varve structure: (1) the minerogenic lamina, which accumulates during spring as a result of catchment erosion triggered by spring floods and (2) the organic lamina, which is composed of allochthonous and autochthonous organic matter that accumulates during summer, autumn, and winter. The minerogenic influx is related to variations in snow accumulation and follows the different phases of the North Atlantic Oscillation (NAO). Decreased snow accumulation is related to a weakened NAO phase. Thus, the minerogenic influx record provides additional information about NAO variation. The Fe/Mn ratio is related to changes in redox conditions at the lake floor. The oxygen availability in the lake floor depends on the duration of the ice cover during winter. Strengthened Siberian High (SH) causes colder autumn and winter temperatures and therefore leads to extended duration of ice cover. Fe/Mn can be considered as a proxy for SH. The sediment record suggests pronounced, generally positive but strongly fluctuating NAO phase, from ca. 4100 to 3200 varve yr BP. Periods of strengthened SH are observed at 3900-3600, 1900-1500, and 1200-750 varve yr BP. Our study suggests that NAO and SH operate individually, are not clearly linked, and do not entirely block each other.
description: Varve thickness data from Lake Kalliojärvi, Eastern Finland for the past 4,000 years. A varve consists of two types of laminae. A minerogenic laminae consist of minerogenic clasts, grain size maximum of 25 um. Minerogenic clast accumulation is related to catchment erosion during spring floods triggered by melting of snow. The second lamina consists of organic material of autochthonous and allochthonous origin. Digital image analysis was used to count and analyse the physical properties of the varves. A manual revision of the automatic varve counts was made using thin sections under microscope. Varve chronology is based on a single varve count; however, three individual counts were performed for comparison and to calculate the error estimate. In total 4132 varves were counted. Counting error estimation is +/- 2.2% for the entire varve sequence.

Provided Keywords: Lacustrine varved sediments; North Atlantic Oscillation; Siberian High; Snowfall reconstruction; Northern Europe; Geochemistry
DOI: 10.25921/t5a2-h688
title: NOAA/WDS Paleoclimatology - Porter - Johnson Creek site JC1 - PCGL - ITRDB CANA538

description: We present a new 23-site network of white spruce ring-width chronologies near boreal treeline in Old Crow Flats, Yukon Territory, Canada. Most chronologies span the last 300 years and some reach the mid-16th century. The chronologies exhibit coherent growth patterns before the 1930s. However, since the 1930s, they diverge in trend and exhibit one of two contrasting, but well-replicated patterns we call Group 1 and Group 2. Over the instrumental period (1930-2007) Group 1 sites were inversely correlated with previous-year July temperatures while Group 2 sites were positively correlated with growth-year June temperatures. At the broader northwestern North America (NWNA) scale, we find that the Group 1 and Group 2 patterns are common to a number of white spruce chronologies, which we call NWNA 1 and NWNA 2 chronologies. The NWNA 1 and NWNA 2 chronologies also share a single coherent growth pattern prior to their divergence (ca. 1950s). Comparison of the NWNA 1/NWNA 2 chronologies against gridded 20th-century temperatures for NWNA and reconstructed northern hemisphere summer temperatures (ad 1300-2000) indicates that all sites responded positively to temperature prior to the mid-20th century (at least back to ad 1300), but that some changed to a negative response (NWNA 1) while others maintained a positive response (NWNA 2). The spatial extent of divergence implies a large-scale forcing. As the divergence appears to be restricted to the 20th century, we suggest that the temperature response shift represents a moisture stress caused by an anomalously warm, dry 20th-century climate in NWNA, as indicated by paleoclimatic records. However, because some sites do not diverge and are located within a few kilometres of divergent sites, we speculate that site-level factors have been important in determining the susceptibility of sites to the large-scale drivers of divergence.
description: NOAA Template Raw Measurements file added 2019-01-27. NOAA Template Raw Measurements file added 2019-02-04.
DOI: 10.25921/t9ft-f585
title: NOAA/WDS Paleoclimatology - Great Lakes Glacial Events Radiocarbon Dates

description: Data of past climate and environment derived from unusual proxy evidence.  Parameter keywords describe what was measured in this data set.  Additional summary information can be found in the abstracts of papers listed in the data set citations.
DOI: 10.25921/tvwr-2z17
title: NOAA/WDS Paleoclimatology - Buckley - Yolla Bolly - PIBA - ITRDB CA555

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Chronology file added 2018-12-20. NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/t81y-a746
title: NOAA/WDS Paleoclimatology - Laguna La Gaiba, Bolivia 40 KYr Leaf Wax Carbon and Hydrogen Isotope Data

description: Stable isotope analysis of leaf waxes in a sediment core from Laguna La Gaiba, a shallow lake located at the Bolivian margin of the Pantanal wetlands, provides new perspective on vegetation and climate change in the lowland interior tropics of South America over the past 40,000 years. The carbon isotopic compositions (d13C) of long-chain n-alkanes reveal large shifts between C3- and C4-dominated vegetation communities since the last glacial period, consistent with landscape reconstructions generated with pollen data from the same sediment core. Leaf wax d13C values during the last glacial period reflect an open landscape composed of C4 grasses and C3 herbs from 41-20 ka. A peak in C4 abundance during the Last Glacial Maximum (LGM, ~21 ka) suggests drier or more seasonal conditions relative to the earlier glacial period, while the development of a C3-dominated forest community after 20 ka points to increased humidity during the last deglaciation. Within the Holocene, large changes in the abundance of C4 vegetation indicate a transition from drier or more seasonal conditions during the early/mid-Holocene to wetter conditions in the late Holocene coincident with increasing austral summer insolation. Strong negative correlations between leaf wax d13C and image values over the entire record indicate that the majority of variability in leaf wax image at this site can be explained by variability in the magnitude of biosynthetic fractionation by different vegetation types rather than changes in meteoric water image signatures. However, positive image deviations from the observed d13C-image trends are consistent with more enriched source water and drier or more seasonal conditions during the early/mid-Holocene and LGM. Overall, our record adds to evidence of varying influence of glacial boundary conditions and orbital forcing on South American Summer Monsoon precipitation in different regions of the South American tropics. Moreover, the relationships between leaf wax stable isotopes and pollen data observed at this site underscore the complementary nature of pollen and leaf wax d13C data for reconstructing past vegetation changes and the potentially large effects of such changes on leaf wax image signatures. 
description: Leaf wax (C27-C33 n-alkane) carbon and hydrogen isotope data from Laguna La Gaiba sediments
DOI: 10.25921/t944-5w66
title: NOAA/WDS Paleoclimatology - Stokes - Mount Trumbull Site A June Tank Tuweep - PIED - ITRDB AZ032

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Chronology file added 2018-12-20. NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/tfze-9854
title: NOAA/WDS Paleoclimatology - Woodhouse - Mesa de Maya - PIPO - ITRDB CO569

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Chronology file added 2018-12-20. NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/tc8f-1r06
title: NOAA/WDS Paleoclimatology - Southeastern Indian Ocean Mg/Ca, Ba/Ca, d18O and SST data over the last 17,000 yr. BP

description: Time series of Mg/Ca, Ba/Ca, and δ18O analyzed in tests of surface-dwelling planktonic foraminifer Globigerinoides ruber from two marine sediment cores recovered in the Mozambique Channel offthe Zambezi River, southwestern tropical Indian Ocean, reveal climate variability over the last 17 kyr. Analysis of samples collected from the water column of the Mozambique Channel validates that Mg/Ca in G. ruber reflects calcification temperatures at 0-30 m water depth and that the surface water of the southwestern Indian Ocean is very sensitive to dissolved Ba input from adjacent rivers. Foraminiferal Ba/Ca and Mg/Ca time series are used to reconstruct hydrological and thermal changes over southeastern African and southwestern tropical oceans. The Mg/Ca-based sea surface temperature (SST) estimates indicate that the thermal evolution of the tropical southwestern Indian Ocean followed, within age model uncertainties, climate changes over Antarctica. The trend of the SST record is marked by a gradual warming from 24.7 ± 0.6 °C at 17.0 ± 0.2 kyr BP to 26.4 ± 0.3 °C at 10-11 kyr BP interrupted by two prominent coolings of ~1.5 ± 0.2 °C and ~1 °C centered at 15 ± 0.1 kyr BP and 13.4 ± 0.2 kyr BP, respectively. Declining SSTs in the early Holocene reach their minimum (25 °C) at 8.7 ± 0.2 kyr BP and give way to stable thermal conditions over the Middle and Late Holocene. The Ba/Ca record indicates that the Zambezi basin experienced relatively wetconditions during the early phase of the last deglaciation, Bølling-Allerød, and the early Holocene. These wet phases coincide with an increase of SST in the Mozambique Channel. In contrast, relatively dry conditions through-out the middle and late Holocene epoch are accompanied by relatively cold Mozambique Channel surface water. These shifts likely reflect a response to meridional shifts of the austral westerlies and subtropical front. These hypothesized shifts would have modulated the advection of cold Southern Ocean water into the Mozambique Channel. Changes in SST in the Mozambique Channel, and possible resultant changes in the zonal gradient in the tropical Indian Ocean, in turn, had a strong impact on the precipitation over southeastern Africa.
DOI: 10.25921/tp5c-sc16
title: NOAA/WDS Paleoclimatology - United Kingdom Bithynia opercula Amino Acid Racemization Data

description: Marine and ice-core records show that the Earth has experienced a succession of glacials and interglacials during the Quaternary (last ~2.6 million years), although it is often difficult to correlate fragmentary terrestrial records with specific cycles. Aminostratigraphy is a method potentially able to link terrestrial sequences to the marine isotope stages (MIS) of the deep-sea record. We have used new methods of extraction and analysis of amino acids, preserved within the calcitic opercula of the freshwater gastropod Bithynia, to provide the most comprehensive data set for the British Pleistocene based on a single dating technique. A total of 470 opercula from 74 sites spanning the entire Quaternary are ranked in order of relative age based on the extent of protein degradation, using aspartic acid/asparagine (Asx), glutamic acid/glutamine (Glx), serine (Ser), alanine (Ala) and valine (Val). This new aminostratigraphy is consistent with the stratigraphical relationships of stratotypes, sites with independent geochronology, biostratigraphy and terrace stratigraphy. The method corroborates the existence of four interglacial stages between the Anglian (MIS 12) and the Holocene in the terrestrial succession. It establishes human occupation of Britain in most interglacial stages after MIS 15, but supports the notion of human absence during the Last Interglacial (MIS 5e). Suspicions that the treeless 'optimum of the Upton Warren interstadial' at Isleworth pre-dates MIS 3 are confirmed. This new aminostratigraphy provides a robust framework against which climatic, biostratigraphical and archaeological models can be tested.
description: Amino acid racemization (AAR) data on Bithynia opercula samples from a variety of sites in the British Isles and selected northern European stratotypes.  D/L data for aspartic acid, glutamic acid, serine, alanine and valine, and [Ser]/[Ala] in Bithynia opercula.
DOI: 10.25921/tcd8-9s57
title: NOAA/WDS Paleoclimatology - Cold Air Cave, South Africa 350Yr Isotope Data and Temperature Reconstruction

description: A 350-year-long, well-dated d18O stalagmite record from the summer rainfall region in South Africa is positively correlated with regional air surface temperatures at interannual time scales. The coldest period documented in this record occurred between 1690 and 1740, slightly lagging the Maunder Minimum (1645-1710). A temperature reconstruction, based on the correlation between regional surface temperatures and the stalagmite d18O variations, indicates that parts of this period could have been as much as 1.4°C colder than today. Significant cycles of 22, 11 and 4.8 years demonstrate that the solar magnetic and the El Niño-Southern Oscillation cycle could be important drivers of multidecadal to interannual climate variability in this region. The observation that the most important driver of stalagmite d18O on interannual time scales from this subtropical region is regional surface temperature cautions against deterministic interpretations of d18O variations in low-latitude stalagmites as mainly driven by the amount of precipitation.
description: This dataset contains 350-year stalagmite stable isotope data and 5-yr smoothed annual mean temperature reconstruction (deviation from 1961-90 mean, ± 2std error = 0.578082397 deg C) from Cold Air Cave in South Africa.
DOI: 10.5517/cc80f3s
title: CCDC 238734: Experimental Crystal Structure Determination

description: Related Article: Haoxi Huang, Yuanhua Wang, Zhiyong Chen, Wen H. Hu|2005|Synlett|2005|2498|doi:10.1055/s-2005-872689
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.25921/tk6w-7654
title: NOAA/WDS Paleoclimatology - Petersen fire data from Beef Pasture - IMPD USBEE001

description: Records of past fire occurrence from tree rings, charcoal found in lake sediments, and other proxies. Parameter keywords describe what was measured in this data set.  Additional summary information can be found in the abstracts of papers listed in the data set citations.  Additional information on the International Multiproxy Database (IMPD) data set procedures are also available.
DOI: 10.5517/cc8xx35
title: CCDC 266107: Experimental Crystal Structure Determination

description: Related Article: Yong-Ling Shi, Min Shi|2005|Synlett||2623|doi:10.1055/s-2005-917109
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/cc93jsp
title: CCDC 271522: Experimental Crystal Structure Determination

description: Related Article: Ling Zhou, Xiao-Ping Cao, B.Neumann, H.-G.Stammler, D.Kuck|2005|Synlett|2005|2771|doi:10.1055/s-2005-918937
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/cc9fj3b
title: CCDC 281111: Experimental Crystal Structure Determination

description: Related Article: D.Enders, S.Noll, J.W.Bats|2005|Synlett||2679|doi:10.1055/s-2005-917095
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.25921/tvnn-tc12
title: NOAA/WDS Paleoclimatology - Lake El'gygytgyn, NE Russia Pliocene Biogeochemical Data and Temperature Reconstruction

description: The Pliocene epoch represents an analog for future climate, with atmospheric carbon dioxide concentrations and continental configurations similar to present. Although the presence of multiple positive feedbacks in polar regions leads to amplified climatic changes, conditions in the Pliocene terrestrial Arctic are poorly characterized. High latitude sedimentary records indicate that dramatic glacial advance and decay occurred in the Pliocene Arctic, with attendant effects on global sea-level. Understanding these deposits and their implications for Earth's future requires developing a sense of climatic evolution across the Pliocene-Pleistocene transition and during the intensification of Northern Hemisphere Glaciation (iNHG) ~2.7 million yr ago (Ma). Here we reconstruct Arctic terrestrial environmental change from 2.82-2.41 Ma (Marine Isotope Stages (MIS) G10-95) using the distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) and the isotopic composition of plant leaf waxes (dDwax) in a sedimentary archive from Lake El'gygytgyn, Northeast Russia. Our records reveal changes in proxy behavior across this interval that we attribute to changing boundary conditions, including sea level, sea ice, vegetation and pCO2 during different MISs. We find that brGDGT temperatures and dDwax are decoupled for most of the record, although both show an increasing range of glacial-interglacial variability following iNHG. dDwax is stable from MIS G10-G4 despite changes in vegetation and temperature, suggesting different sources or pathways for moisture to Lake El'gygytgyn during the Late Pliocene.
description: Biogeochemical data and deuterium isotopes from Pliocene sediments (2.8 - 2.4 ma) collected in Lake El'gygytgyn, NE Russia.  Data include branched GDGT (glycerol dialkyl glycerol tetraether) measurements and indices, n-alkanes, deuterium isotopes, and reconstructed temperature.
DOI: 10.5517/cc97z0h
title: CCDC 275776: Experimental Crystal Structure Determination

description: Related Article: Xiaoxia Sun, Shuangjun Wang, Shangjin Sun, Jin Zhu, Jingen Deng|2005|Synlett|2005|2776|doi:10.1055/s-2005-918927
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.3535/saq-b92-pb7
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/hml-mpd-7z4
title: Elephantidae Gray, 1821

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/qxh-8dn-zze
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/l5x-cjf-b0w
title: Bison C. H. Smith, 1827

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/s00-s9a-hy6
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/7xl-g1l-y7a
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/jw0-42j-wmh
title: †Palorbitolina lenticularis (Blumenbach, 1805)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/p0d-cqd-6zf
title: Equus (Equus) caballus Linnaeus, 1758

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.15468/dl.ezcgwy
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Oreochromis niloticus",
 "Country is Syrian Arab Republic",
 "HasCoordinate is true"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0019580-250811113504898/datasets/export for details.
DOI: 10.3535/bss-mbl-z36
title: †Palorbitolina lenticularis (Blumenbach, 1805)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/wex-3t0-6jv
title: †Nucleolites scutatus Lamarck, 1816

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/bhs-3vx-qtc
title: Foraminifera d'Orbigny, 1826

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/zzf-c5x-3qf
title: Lamniformes

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/vta-y2e-7mz
title: Bos taurus primigenius Bojanus, 1827

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.