cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/s655-jh52
title: NOAA/WDS Paleoclimatology - GRIP Ice Core 386 KYr Ion Concentrations Data

description: Ion chromatography data of Ca, Mg, Cl and Ca and Coulter counter particle measurements are used to study the cycle of marine and continental primary aerosol reaching Greenland in relation to climatic changes over the last 150 kyr. A detailed comparison between Greenland (Dome Summit) and Antarctic (Vostok) records provides new insight on a potential link between northern and southern patterns. Ca is a good indicator of continental input and is mainly emitted as CaCO3. An attempt is made to estimate the contribution of aluminosilicates using the concentration of insoluble particles greater than 0.5 um in diameter. The relative abundance of non-sea-salt Mg and Ca and of aluminosilicate shows that the calcium content of continental background aerosol over Greenland was much higher during the glacial age. The neutralization capacity of carbonaceous aerosol is estimated. The inverse relationship between d18O and continental input as well as the response of this input to the rapid climatic variations that have occurred during the second part of the glacial age are discussed in terms of source and transport modification in relation to the presence and the extent of the great Laurentide ice cap. The corresponding Vostok profiles strongly suggest that some of the phenomena observed at high northern latitudes are of global concern. The marine component of Na (Nam) is a good tracer of sea-salt aerosol. Similarly to continental input, it shows an inverse but more linear relationship with d18O. The sensitivity of Greenland and Antarctic marine input to climate variations of small and large amplitude is compared, and a corresponding estimation is made for the aeolian contribution. The respective influence of atmospheric circulation and the water vapor cycle is discussed. The chlorine to marine sodium weight ratio increases with temperature from values very close to the bulk seawater ratio during the last glacial maximum (18-20 kyr B.P.) to values significantly higher during the Holocene and warm Eemian. The corresponding excess of chloride (HCl) is discussed in terms of atmospheric transport, taking into account the role of atmospheric acidity on sea-salt fractionation processes. Owing to postdepositional phenomena, similar Vostok data must be considered cautiously. Nevertheless, aerosol fractionation seems to have been much more important over the Vostok site, except during glacial extrema.
description: Ion data from the GRIP ice core, as well as organic acids, oxygen isotopes and layer thickness.
DOI: 10.25921/sshx-w702
title: NOAA/WDS Paleoclimatology - Griggs - Mabee Farm - QUSP - ITRDB NY044

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: Mabee Farm, Rotterdam Junction, NY. 
# Purpose of Collection:
# Archaeology - construction (felling dates)
# Cores are stored at:
# Cornell Tree Ring Laboratory Archive, Cornell University
# Notes:
# Ten samples from "one of earliest standing houses" in Albany - Schenectady region, but samples show at least three phases. All are species from the white oak group, probably Quercus alba. 
# Reference:
# Site report available at http://dendro.cornell.edu/projects/usa.php NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/stdz-z729
title: NOAA/WDS Paleoclimatology - Gulf of Aden 40,000 Year UK37, Mg/Ca, d18O, and TEX86 Data

description: The Indian monsoon, the largest monsoon system on Earth, responds to remote climatic forcings, including temperature changes in the North Atlantic. The monsoon was weak during two cool periods that punctuated the last deglaciation - Heinrich Stadial 1 and the Younger Dryas. It has been suggested that sea surface cooling in the Indian Ocean was the critical link between these North Atlantic stadials and monsoon failure; however, based on existing proxy records it is unclear whether surface temperatures in the Indian Ocean and Arabian Sea dropped during these intervals. Here we compile new and existing temperature proxy data from the Arabian Sea, and find that surface temperatures cooled whereas subsurface temperatures warmed during both Heinrich Stadial 1 and the Younger Dryas. Our analysis of model simulations shows that surface cooling weakens the monsoon winds and leads to destratification of the water column and substantial subsurface warming. We thus conclude that sea surface temperatures in the Indian Ocean are indeed the link between North Atlantic climate and the strength of the Indian monsoon.
description: Gulf of Aden temperature proxy data, including UK'37, Mg/Ca of foraminifera (Globigerinoides ruber, white), d18O of G. ruber (white), and TEX86 measured on core P178-15P.
DOI: 10.25921/sp6t-sy70
title: NOAA/WDS Paleoclimatology - Quelccaya Ice Cap - Particle, d18O, and Accumulation Data

description: The objective of this work is to evaluate the potential of tropical glaciers and ice caps for the reconstruction of past climatic conditions by the analysis of firn and ice cores. Samples were collected in pits and from cores retrieved on three snow fields in the South American Andes: Quelccaya Ice Cap and Huascarán in Peru and Chimborazo in Ecuador. These are compared with results from west Africa and Indonesia. Measurements include the microparticle concentration, oxygen isotopic abundance ratios, and total beta radioactivity, which in polar regions often exhibit seasonal depositional cycles. Annual variations in these three parameters are fairly well defined on Quelccaya and Huascarán and are apparently absent on Chimborazo. The Quelccaya Ice Cap contains the best preserved annual signal for all three parameters and, although in some instances the annual cycle is difficult to distinguish, the measurement of more than one stratigraphic parameter aids in the interpretation of the firn core records. The relatively flat bottom topography under Quelccaya suggests a simple ice flow regime, and depth-age calculations indicate that an ice core to bedrock should contain a record of 600 to 1300 years. This inference was confirmed by drilling to bedrock in 1983. This investigation of tropical glaciers indicates that the Quelccaya Ice Cap on the eastern edge of the Peruvian Andes has excellent potential to contain a lengthy and interpretable record of climatic conditions within the tropics of South America.
description: Additional References:
Thompson, L.G., E. Mosley-Thompson and Benjamin Morales Arnao. 1984. Major El Nino/Southern Oscillation events recorded in stratigraphy of the tropical Quelccaya Ice Cap. Science, 226 (4670), 50-52.

Thompson, L. G., E. Mosley-Thompson, J. F. Bolzan and B. R. Koci. 1985. A 1500 year record of tropical precipitation recorded in ice cores from the Quelccaya Ice Cap, Peru. Science, 229(4717), 971-973
DOI: 10.5281/zenodo.17361041
title: Divergent strategy to supremacy: cranial evolution and evolutionary constraints in Cretaceous apex- and meso-predators

description: Apex and meso-predators of the Cretaceous exhibited distinct macroevolutionary trajectories, reflecting differential responses to ecological and environmental pressures. However, the role of evolutionary process in shaping macroevolutionary trends of apex and meso-predatory non-avian theropods remains poorly understood. Here, I use the maxillary shape and size, combined with phylogenetic comparative methods, to elucidate distinct macroevolutionary trends among three lineages of larger- and medium-size non-avian theropods (Carcharodontosauria, Abelisauridae, and Coelurosauria). Abelisaurids primarily explored morphological innovation in skull shape while maintaining relatively stable body sizes through time. Carcharodontosaurids, in contrast, followed a size-driven evolutionary path, achieving gigantism while retaining conservative cranial morphologies. Coelurosaurs, particularly tyrannosauroids, adopted a mixed strategy, displaying early cranial modifications during the Jurassic, followed by an explosive increase in body size in the Late Cretaceous. These divergent strategies suggest an initial phase of disruptive selection that promoted morphological divergence, followed by stabilizing selection and phenotypic canalization in the Cretaceous period, ultimately shaping specialized adaptive responses in each clade. Overall, these results highlight how evolutionary history, ecological interactions, and developmental constraints structured the diversification of apex- and meso-predator non-avian theropods, providing insight into the interplay between innovation, constraint, and ecological adaptation in the evolution of large and medium terrestrial carnivores.
description: Here there is the R scripts with macroevolutioanry analysis, tree calibration procedure and the necessary data to run the codes.
DOI: 10.25921/smfy-kq56
title: NOAA/WDS Paleoclimatology - San Francisco Bay Northern Estuary 625 Year Salinity Reconstruction

description: Blue oak tree-ring chronologies correlate highly with winter-spring precipitation totals over California, with Sacramento and San Joaquin river stream flow, and with seasonal variations in the salinity gradient in San Francisco Bay. The convergence of fresh and saline currents can influence turbidity, sediment accumulation, and biological productivity in the estuary. Three selected blue oak chronologies were used to develop a 625-year-long reconstruction of the seasonal salinity gradient, or low salinity zone (LSZ), which provides a unique perspective on the interannual-to-decadal variability of this important estuarine habitat indicator. The reconstruction was calibrated with instrumental LSZ data for the winter-spring season, and explains 73% of the variance in the February-June position of the LSZ from 1956 to 2003. Because this calibration period post-dates the sweeping changes that have occurred to land cover, channel morphology, and natural streamflow regimes in California, the reconstruction provides an idealized estimate for how the LSZ might have fluctuated under the seasonal precipitation variations of the past 625 years, given the modern geometry and bathymetry of the estuary and land cover across the drainage basin. The February-June season integrates precipitation and runoff variability during the cool season, and does not extend into the late-summer dry season when LSZ extremes can negatively affect Sacramento-San Joaquin Delta (Delta) agriculture and some aquatic organisms. However, there is such strong inter-seasonal persistence in the instrumental LSZ data that precipitation totals during the cool season can strongly pre-condition LSZ position in late summer. The 625-year-long reconstruction indicates strong interannual and decadal variability, the frequent recurrence of consecutive 2-year LSZ maxima and minima, large-scale ocean atmospheric forcing, and an interesting asymmetrical influence of warm El Nino-Southern Oscillation (ENSO) events.
description:  Reconstruction of the position of the low salinity zone (LSZ) in the San Francisco Bay Northern Estuary for the past 625 Years, based on 3 northern California blue oak tree-ring chronologies.  Reconstructed parameter is the February–June seasonal LSZ position, in kilometers from the Golden Gate.
DOI: 10.25921/s5cq-zk61
title: NOAA/WDS Paleoclimatology - Baffin Island Lakes Surface Sediment Leaf Wax Hydrogen Isotope Data

description: The hydrogen isotope composition of plant waxes preserved in lacustrine sediments is a potentially valuable tool for reconstructing paleoenvironmental changes in the Arctic. However, in contrast to the mid- and low-latitudes, significantly less effort has been directed towards understanding the factors controlling D/H fractionation in high latitude plant waxes and the impact of these processes on the interpretation of sedimentary leaf wax dD records. To better understand these processes, we examined the D/H ratios of long chain fatty acids in lake surface sediments spanning a temperature and precipitation gradient on Baffin Island in the eastern Canadian Arctic. D/H ratios of plant waxes increase with increasing temperature and aridity, with values ranging from -240 per mil to -160 per mil over the study area. Apparent fractionation factors between n-alkanoic acids in Arctic lake sediments and precipitation (EFA-ppt) are less negative than those of mid-latitude lakes and modern plants by 25 per mil to 65 per mil, consistent with n-alkane data from modern Arctic plants (Yang et al., 2011). Furthermore, EFA-ppt values from Arctic lakes become systematically more positive with increasing evaporation, in contrast to mid-latitude sites, which show little to no change in fractionation with aridity. These data are consistent with enhanced water loss and isotope fractionation at higher latitude in the Arctic summer, when continuous sunlight supports increased daily photosynthesis. The dominant control on dDFA variations on Baffin Island is temperature. However, changing EFA-ppt result in steeper dDFA-temperature relationships than observed for modern precipitation. The application of this dDFA-based paleotemperature calibration to existing dDFA records from Baffin Island produces much more realistic changes in late Holocene temperature and highlights the importance of these effects in influencing the interpretation of Arctic dDFA records. A better understanding of the controls on hydrogen isotope fractionation in high latitude leaf waxes will be essential to the proper interpretation of isotope records from sedimentary plant waxes in the Arctic.
description: Hydrogen isotope (dD) data from Baffin Island lakes, including measurements made on surface sediment leaf waxes, lake water, and precipitation.
DOI: 10.15468/dl.txv6dc
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Struthioniformes)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1980",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 },
 "Geometry POLYGON((-140 -70,-130 -70,-130 -60,-140 -60,-140 -70))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0024523-251009101135966/datasets/export for details.
DOI: 10.25921/sknj-1t84
title: NOAA/WDS Paleoclimatology - Smith - Mount Porter - TSME - ITRDB CANA472

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/spt7-vk92
title: NOAA/WDS Paleoclimatology - Eastern Finland 1,000 Year Lake Level Reconstructions

description: Future climate warming is expected to alter atmospheric moisture balance and therefore paleoclimatic archives of past moisture and hydrological patterns may provide understanding of the magnitude, speed, and ecosystem responses to the regionally altered climatic regimes. The present study aimed at disentangling millennial variation in hydroclimatic parameters, including summer effective moisture (lake levels) and ice-free season by using sedimentary cladoceran fossils. We used a site-specific cladoceran-based inference model to reconstruct lake level fluctuations in a 1500-yr sediment record from Lake Pieni-Kauro, eastern Finland in the context of previously established paleoclimatic data of summer temperature and precipitation. In addition, we applied cladoceran planktonic/littoral ratio, mean body size, and abundance of fossil ephippia as supplementary proxies for paleoclimatic interpretations. The results showed that lake level was lower during the pre- and early Medieval Climate Anomaly (MCA, around 500-1000 AD) than at present and started to rise toward the culmination during the Little Ice Age (LIA, around 1600–1700 AD) when the lake level was higher than at present. Pelagic cladoceran body size was larger and abundance of ephippia increased during the LIA suggesting significant reduction in the length of the ice-free season and lower water temperatures. Comparison of the lake level reconstruction with the previous paleoclimatic data suggested that effective moisture has had a long-term negative relationship with temperature and positive relationship with summer precipitation in eastern Finland. The results indicated that the pre- and early MCA was warm and dry (long ice-free season, low summer effective moisture) and the culmination of the LIA was cool and moist (reduced ice-free season, increased summer effective moisture). Unraveling the seasonality of the multicentury hydroclimatic patterns in eastern Finland may offer important insights in linking the large-scale atmospheric circulation patterns to seasonal climate events.
description: Lake level reconstructions based on sedimentary cladoceran fossils
DOI: 10.25921/sm55-yb24
title: NOAA/WDS Paleoclimatology - Briffa et al. 1988 European Gridpoint and Regional Summer Temperature Reconstructions

description: Temperature variations over Europe are reconstructed for a 6-month “summer” season from April to September for the period 1750–1850 using a network of maximum latewood density chronologies of coniferous trees. Around 44% of the variance of the whole temperature grid was explained in calibration. Independent verification indicates that over the reconstruction period the explained variance averaged over the whole grid should lie in the range 30 to 35%. The reconstructions are better in the north of the region (about 50% explained temperature variance based on comparison with independent climate data) than in the south (below 20%). The temperature recontructions indicate cooler summers over Europe from 1812 to 1816 and during the 1830s. The summers of the 1820s were the warmest reconstructed. Decadal variations occur on a regional scale but no similar periods of anomalously cooler or warmer summers occurred between 1750 and 1810 throughout Europe.
DOI: 10.25921/spxt-ee88
title: NOAA/WDS Paleoclimatology - Kharal - Manang Valley 2 - ABSB - ITRDB NEPA052

description: Elevation is a strong determinant of local climate and may therefore be an important factor to consider when examining the association between climate and tree growth. In this study, we developed a set of tree-ring width records for Abies spectablis (D.Don Spach) in the Manang Valley of central Nepal Himalaya and tested how tree growth and the relationship between tree growth and climate varied across a 450-m elevation transect. The sampled trees had a median age of 115 years, and the oldest individual specimen, which was located at 3775 m, had more than 212 rings. The common signal shared across the tree-ring series was relatively weak, which is typical for ring-width chronologies from the Himalayas. Even though these forests are located within a semi-arid climate, temperature had a stronger and more consistent influence on Abies growth than precipitation. All three chronologies across the transect exhibited a negative relationship with mean March-June temperatures, which could reflect the impact of warm weather during the early part of the growing season, possibly mediated through its influence on evapotranspiration and soil moisture. While interannual fluctuations in tree growth were synchronous across sites, longer-term trends in growth varied across the transect, with high-elevation trees showing elevated growth during the last two or three decades and lower-elevation trees behaving just the opposite. These disparate trends suggest the factors that control longer-term trends in forest productivity vary substantially with elevation. For studies intending to use tree-ring width records in the Trans Himalaya as climate proxies, it may be preferable to collect specimens at lower forest sites, where the agreement across the population of trees is stronger. Because longer-term trends in ring width can differ substantially from one elevation to another in this region, it may also be necessary to collect a greater number of samples from several positions along an elevation gradient.
description: NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.3535/1cq-hqr-9te
title: Plantae

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/9dp-rs1-4mr
title: Plantae

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/qbq-axm-hn7
title: Platanus L.

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/xdg-b0y-tja
title: Plantae

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/skz-tzx-eep
title: Carpinus L.

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/55t-58j-78j
title: Plantae

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/dyb-2vs-3qa
title: Plantae

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.15468/dl.6krq2r
title: Occurrence Download

description: A dataset containing 3 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Neodontobutis tonkinensis)",
 "BasisOfRecord is one of (Specimen, Literature Occurrence, Human Observation, Observation)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1991",
 "Year is less than or equal to 2025"
 ]
}

 The dataset includes 3 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0019551-250811113504898/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/jn3-j73-h4b
title: Plantae

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/rn9-k91-m8l
title: Plantae

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/01d-kqq-88b
title: Plantae

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/yaz-t9l-drb
title: Plantae

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.57931/2583647
title: Electric Grid Visualization: Hourly Generation, Load, Unserved Load, and Locational Marginal Prices during a 2018 Heatwave

description: Visualization of hourly generation, load, unserved load, and locational marginal energy prices in the western United States during a July 22-28 heatwave event in 2018. In addition to hourly time series data of each of the parameters, choropleth maps showing the hourly value for each balancing authority are provided as well as a county-level choropleth map of temperature.
DOI: 10.3535/21l-qrm-lxq
title: Plantae

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