cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/yrx6-sm17
title: NOAA/WDS Paleoclimatology - Indian Ocean Pliocene Paired Foraminiferal d18O and Mg/Ca Data

description: To understand the gradual global cooling during the mid‐Pliocene (3.5-2.5 Myr ago) one needs to consider the tectonical constriction of tropical seaways, which affected ocean circulation and the evolution of climate. Here we use paired measurements of d18O and Mg/Ca ratios of planktonic foraminifera to reconstruct the Pliocene hydrography of the western tropical Indian Ocean (Site 709C) and changes in the Leeuwin Current in the eastern subtropical Indian Ocean (Site 763A) in response to Indonesian Gateway dynamics. Today, the Indonesian Throughflow (ITF) and, subsequently, the warm southward flowing Leeuwin Current off Western Australia are essential for the polar heat transport in the Indian Ocean. During 3.5-3 Ma, sea surface temperatures significantly dropped in the Leeuwin Current area, becoming since -3.3 Ma 2C-3C cooler than the rather unchanged sea surface temperatures from the eastern and western tropical Indian Ocean. We refer this drop in sea surface temperatures to a weakened Leeuwin Current with severe climatic effects on Western Australia induced by a tectonically reduced surface ITF. We suggest that this reduced surface ITF led to a diminished poleward heat transport in the Indian Ocean resulting in a weakened Leeuwin Current and possibly to cooling of the Benguela upwelling system.
description: Combined planktonic foraminiferal Mg/Ca and d18O data spanning 
the time period from 6-2 Ma, from 2 Indian Ocean ODP sites. 
Core ODP 763A is located in the subtropical eastern Indian Ocean 
within the present influence of the Leeuwin Current, and Core 
ODP 709C is located in the tropical western Indian Ocean. 
The ODP 709C isotope data are from Shackleton and Hall, 1990.
DOI: 10.25921/yape-t984
title: NOAA/WDS Paleoclimatology - Moose Lake, Alaska 6000 Year Midge Inferred July Temperature

description: Despite their importance for evaluating anthropogenic climatic change, quantitative temperature reconstructions of the Holocene remain scarce from northern high latitude regions. We conducted high-resolution midge analysis on the sediments of the past 6000 years from a lake in south-central Alaska. Results were used to estimate summer temperature (TJuly) variations on the basis of a midge temperature transfer function. The TJuly estimates from the near-surface samples are broadly consistent with instrumental and treering-based temperature data. Together with previous studies, these results suggest that midge assemblages are more sensitive to small shifts in summer temperature (~0.5°C) than indicated by the typical error range of midge temperature transfer functions (~1.5°C). A piecewise linear regression analysis identifies a significant change point at ca. 4000 years before present (cal. BP) in our TJuly record, with a decreasing trend after this point. Episodic TJuly peaks (~14.5°C) between 5500 and 4200 cal. BP and the subsequent climatic cooling may have resulted from decreasing summer insolation associated with the precessional cycle. Centennial-scale climatic cooling of up to 1°C occurred around 4000, 3300, 1800-1300, 600, and 250 cal. BP. These cooling events were more pronounced and lasted longer during the last two millennia than between 2000-4000 cal. BP. Some of these events have counterparts in climatic records from elsewhere in Alaska and other regions of the Northern Hemisphere, including several roughly synchronous with known grand minima in solar irradiance. Over the past 2000 years, our TJuly record displays patterns similar to those inferred from a wide variety of temperature proxy indicators at other sites in Alaska, including climatic fluctuations coeval with the Little Ice Age (~245 cal. BP), the Medieval Climate Anomaly (~1000 cal. BP), and the First Millennial Cooling (~1400 cal. BP). To our knowledge, this study offers the first high-resolution, quantitative record of summer-temperature variation that spans longer than the past 2000 years from the high-latitude regionsaround the North Pacific.
description: Multi-decadal midge assemblage and midge-inferred July temperature 
data for Moose Lake, Alaska, for the past 6000 years.
DOI: 10.25921/ysk2-tc35
title: NOAA/WDS Paleoclimatology - Finnish Lapland June-August Cloud Cover Reconstruction from 7.5-0 kY

description: Tree-ring stable isotope chronologies provide very high-resolution palaeoclimatic data, and the number of records is increasing rapidly worldwide. To extend the chronologies back in time, before the period covered by the old living trees, the use of subfossil wood samples is required. Typically, the longest continuous subfossil chronologies consist of regionally collected tree-ring materials, rather than tree rings from a single site, and are likely more sensitive to data heterogeneity. Yet, the characteristics of such datasets remain hitherto unexplored. Here we produce a continuous, decadally resolved chronology of 13C/12C ratio (δ13C) from Finnish Lapland over the past 7.5 ka (5500 BCE to 2010 CE) for which there is replication of at least five Pinus sylvestris trees. Less negative δ13C values were observed as trees age and for western sites (higher in elevation and further from the cold oceanic air flow). The age-related trends in living tree δ13C data were expressed mainly over the first fifty years mimicking the "juvenile effect" whereas the subfossil data showed trend over the trees' lifespan. These findings demonstrated the need to detrend the individual δ13C series before averaging them into the mean chronology. The corresponding biases were removed from the isotopic data using the methods frequently applied for tree-ring width and density proxies, the Regional Curve Standardization (RCS) combined with signal-free approach. While the RCS procedures commonly preserve the long-term variations in the resulting chronology, not all types of them did so as demonstrated for chronologies produced using separate RCS models for the δ13C series with relatively high and low isotopic level (offset from the grand mean). It was shown that these δ13C levels (i.e. the relative isotopic enrichment) result both from the low-frequency climate signal and biogeographical aspects (the site longitude/altitudes). The non-climatic biases were removed from the δ13C series by using separate RCS models for the subsets (western and eastern) of isotopic series. Similar to previous investigations using annually resolved δ13C data from Lapland, our chronology had strong negative correlations to variations in cloud cover. Here, a bootstrapping experiment was used to verify this dendroclimatic association. The resulting palaeo-cloud reconstruction portrayed decadal to multi-millennial variations with centennial anomalies coinciding with the mid and late Holocene events of climate transitions, highlighting the value of subfossil isotope chronologies from tree rings in synthesising climate dynamics from several proxy sources over the present interglacial.
description: Cloud cover reconstruction (June-August) for Finnish Lapland from tree-ring d13C over the past 7.5 thousand years
DOI: 10.25921/y3ap-ej70
title: NOAA/WDS Paleoclimatology - Conedera - Valli Copera - PIST - ITRDB SWIT227

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 Raw Measurements file added 2019-02-05.
DOI: 10.25921/ybyd-bw06
title: NOAA/WDS Paleoclimatology - Pederson - Upper Smith Creek - PSME - ITRDB MT125

description: In western North America, snowpack has declined in recent decades, and further losses are projected through the 21st century. Here, we evaluate the uniqueness of recent declines using snowpack reconstructions from 66 tree-ring chronologies in key runoff-generating areas of the Colorado, Columbia, and Missouri River drainages. Over the past millennium, late 20th century snowpack reductions are almost unprecedented in magnitude across the northern Rocky Mountains and in their north-south synchrony across the cordillera. Both the snowpack declines and their synchrony result from unparalleled springtime warming that is due to positive reinforcement of the anthropogenic warming by decadal variability. The increasing role of warming on large-scale snowpack variability and trends foreshadows fundamental impacts on streamflow and water supplies across the western United States.
description: Purpose of Collection: Climatology - Snowpack reconstruction
#  NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/y7c4-7062
title: NOAA/WDS Paleoclimatology - Zhang et al. 2008 Wanxiang Cave, China Stalagmite d18O Data

description: A record from Wanxiang Cave, China, characterizes Asian Monsoon (AM) history over the past 1810 years. The summer monsoon correlates with solar variability, Northern Hemisphere and Chinese temperature, Alpine glacial retreat, and Chinese cultural changes. It was generally strong during Europe's Medieval Warm Period and weak during Europe's Little Ice Age, as well as during the final decades of the Tang, Yuan, and Ming Dynasties, all times that were characterized by popular unrest.  It was strong during the first several decades of the Northern Song Dynasty, a period of increased rice cultivation and dramatic population increase. The sign of the correlation between the AM and temperature switches around 1960, suggesting that anthropogenic forcing superseded natural forcing as the major driver of AM changes in the late 20th century.
DOI: 10.25921/ynwz-1g29
title: NOAA/WDS Paleoclimatology - Crosta et al. 2004 Southern Ocean Diatom SST-Sea Ice Recons

description: A Modern Analog Technique (MAT5201/31) has been applied to fossil diatom assemblages to provide down-core
estimates of February sea-surface temperatures (SSTs) and of sea ice duration over the past 220 000 years at 56‡40PS,
160‡14PE. At the core location, sea ice progression lagged the SST drop by V1 ka at interglacial^glacial transitions,
and sea ice retreat was almost synchronous to the SST increase at glacial^interglacial terminations. Sea ice increased
continuously during glacial periods to reach its maximum extent at the end of glacial times, although SSTs were
almost constant during glacials. This indicates that SSTs are the major parameter determining the advance and retreat
of sea ice at transitions, but that the sea ice advance during glacial conditions may be related to positive feedbacks of
the ice on albedo, air temperature and meridional wind stress. The strong correlation (r =0.75) between sea ice
duration at the core location and the Vostok CO2 record argues for a control of Antarctic sea ice extent on
atmospheric CO2 concentration via the modification of the ocean-to-atmosphere gas balance.
DOI: 10.25921/y6c1-ks18
title: NOAA/WDS Paleoclimatology - Franzese et al. 2009 Agulhas Retroflection 30KYr Stratigraphic Data

description: The Agulhas Leakage represents a significant portion of the warm, surface return flow of the global overturning circulation and thus may be an important feedback in the ocean climate system. Models indicate that reduced leakage could be caused by a stronger Agulhas Current and/or a more upstream (eastward) Agulhas Retroflection, while a weaker Agulhas Current would result in a more westward retroflection and increased leakage. However, data for the Last Glacial Maximum support both a weaker Agulhas Current and less leakage, implying a possible displacement of the retroflection. We present new 87Sr/86Sr results for modern sediments within this region, confirming that the modern pathway of the Agulhas Current, Retroflection, and Leakage can be traced by terrigenous sediment provenance using Sr isotopes. New 87Sr/86Sr data from sediments deposited during the Last Glacial Maximum suggest that the glacial Agulhas Current and Retroflection followed nearly their modern trajectory. The provenance data appear to rule out both a stronger Agulhas Current and a more upstream Agulhas Retroflection. We conclude that the reduced glacial leakage was caused by the weakened Agulhas Current, with no significant change in the retroflection position. This is inconsistent with the model predictions and thus emphasizes the need for further work in this region.
DOI: 10.25921/ytde-e780
title: NOAA/WDS Paleoclimatology - Ortiz et al. 2009 Chukchi Sea Holocene DSR/qXRD Mineralogy Data

description: Sediment clay and silt mineral assemblages provide an excellent means of assessing the provenance of fine-grained Arctic sediment especially when a unique mineral assemblage can be tied to specific source areas. The diffuse spectral reflectance (DSR) first derivative measurements and quantitative X-Ray Diffraction (qXRD) on a high-resolution sediment core from the continental slope north of Alaska constrain the sediment mineralogy. DSR results are augmented by measurements on several adjacent cores and compared to surface sediment samples from the northern Alaskan shelf and slope. Using Principal Component Analysis (PCA), we infer that the three leading DSR modes relate to mixtures of smectite + dolomite, illite + goethite, and chlorite + muscovite. This interpretation is consistent with the down core qXRD results. While the smectite + dolomite, and illite + goethite factors show increased variability down core, the chlorite + muscovite factor had highest positive loadings in the middle Holocene, between ca. 6.0 and 3.6 ka. Because the most likely source of the chlorite + muscovite suite in this vicinity lies in the North Pacific, we argue that the oscillations in chlorite + muscovite values likely reflect an increase in the inflow of Pacific water to the Arctic through the Bering Strait. The time interval of this event is associated in other parts of the globe with a non-linear response of the climate system to the decrease in insolation, which may be related to changes in water exchange between the Pacific and Arctic Ocean.
DOI: 10.25921/ysx4-gq14
title: NOAA/WDS Paleoclimatology - Slonosky 2002 Paris Monthly Precipitation 1688-2009

description: Precipitation measurements taken at the Paris Observatory from the 1680s to the 1750s are presented; these values are blended with modern data until 2001. The most striking change in the precipitation patterns over the past 300 years is the change in seasonal distribution; in the late 17th and 18th centuries, summer precipitation accounted for 60% of the yearly total, changing to a uniform seasonal distribution in the 20th century. Winter precipitation has increased by 24 mm/century, while summer precipitation increased by 4 mm/century. The winter of 2000/2001 was the wettest of the past three centuries; the year 2000 recorded the largest amount of precipitation since observations began.
description: Adjusted data time series as used in Slonosky 2002 added 10/2019
DOI: 10.25921/ya2q-xh47
title: NOAA/WDS Paleoclimatology - Mamet - SFOR, Wapusk National Park, Manitoba - PCMA - ITRDB CANA280

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 Raw Measurements file added 2019-01-27. NOAA Template Raw Measurements file added 2019-02-04.
DOI: 10.25921/ycpw-7019
title: NOAA/WDS Paleoclimatology - Salzer - Sheep Mountain Update - PILO - ITRDB CA667

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 Raw Measurements file added 2019-02-08.
DOI: 10.15468/dl.gg4txf
title: Occurrence Download

description: A dataset containing 31 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Abroma augusta (L.) Willd."
 ]
}

 The dataset includes 31 records from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007488-250415084134356/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/4ht-myk-tyx
title: Mammalia Linnaeus, 1758

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/7bq-jj7-ewg
title: Mammalia Linnaeus, 1758

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/95e-h02-p43
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/m56-h4a-kve
title: Parrina Cushman, 1931

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/vzf-t4e-lm8
title: †Parvacythereis Gruendel, 1973

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/cya-lt4-wfv
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/dey-m5b-5vw
title: Rhabdammina irregularis Carpenter, 1869

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/jbh-ae3-lqk
title: Amphistegina d'Orbigny, 1826

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/a57-w2b-w9w
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/ssv-xk5-8pn
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.5281/zenodo.15500557
title: Energy-efficient silicon cold-source diodes with subunity ideality factor and high rectification ratio

description: Simulation input and resluts of the paper "Energy-efficient silicon cold-source diodes with subunity ideality factor and highrectification ratio"
DOI: 10.5281/zenodo.15500558
title: Energy-efficient silicon cold-source diodes with subunity ideality factor and high rectification ratio

description: Simulation input and resluts of the paper "Energy-efficient silicon cold-source diodes with subunity ideality factor and highrectification ratio"
DOI: 10.3535/mmf-bj3-1nb
title: Pseudoclavulina juncea Cushman, 1936

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/x3s-vm0-cxq
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/d1r-v71-xx6
title: Cribroelphidium incertum (Williamson, 1858)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/1r7-lzt-nyb
title: †Orbitolites Lamarck, 1801

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/e21-s5z-fdd
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/4jl-5w0-10d
title: Mammalia Linnaeus, 1758

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/bcs-54q-698
title: Mammalia Linnaeus, 1758

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/ka6-b5x-qkl
title: Mammalia Linnaeus, 1758

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/xp6-350-d2f
title: †Mandelstamia Ljubimova, 1955

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/1va-lhl-n79
title: Pseudorotalia schroeteriana (Parker & Jones in Carpenter, 1862)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/7tv-t7p-a19
title: Saidovina karreriana (Brady, 1881)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/t1a-vg5-3lb
title: Chilostomella cushmani Chapman, 1941

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/a25-800-bb9
title: Dentalina albatrossi (Cushman, 1923)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/ldj-5mg-2j3
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/pe7-yex-d34
title: Globorotalia tumida (Brady, 1877)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/xnf-zcz-q0a
title: Phyllopachyceras

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/22h-rb3-8mx
title: Animalia

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/f5y-t06-ste
title: Amphistegina lessonii d'Orbigny in Deshayes, 1830

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/59h-rvl-ca0
title: Bivalvia Linnaeus, 1758

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/9gc-fjg-nd2
title: †Dendritina elegans d'Orbigny, 1846

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/b04-qky-v7g
title: †Curfsina quadrispinata Deroo, 1966

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/rjn-v26-g9j
title: Crinoidea Miller, 1821

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/ytc-r2k-ral
title: Crinoidea Miller, 1821

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.15468/dl.4jzfxm
title: Occurrence Download

description: A dataset containing 816264 species occurrences available in GBIF matching the query:
{
 "Geometry" : [
 "POLYGON((-78.27822 -0.58045,-78.37749 -0.794,-78.45534 -0.93899,-78.45106 -1.08398,-78.37178 -1.14968,-78.11323 -1.25325,-77.8454 -1.23825,-77.6447 -1.17468,-77.509 -1.13326,-77.54971 -0.74972,-77.80897 -0.55545,-78.27822 -0.58045))"
 ]
}

 The dataset includes 816264 records from 433 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0019679-250811113504898/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/k0e-m18-f8y
title: Animalia

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