cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/hqxk-8h74
title: NOAA/WDS Paleoclimatology - The Great Barrier Reef Coral Skeletal Records Database (GBRCD)

description: The Great Barrier Reef (GBR), Australia, has a long history of palaeoenvironmental coral research. However, it can be logistically difficult to find the relevant research and records, which are often unpublished or exist as “grey literature”. This hinders researchers' abilities to efficiently assess the current state of coral core studies on the GBR and thus identify any key knowledge gaps. This study presents the Great Barrier Reef Coral Skeletal Records Database (GBRCD), which compiles 208 records from coral skeletal research conducted since the early 1990s. The database includes records from the Holocene, from ∼8000 years ago, to the present day; records are from the northern, central, and southern GBR from inshore and offshore locations. Massive Porites spp. coral records comprise the majority (92.5 %) of the database, and the remaining records are from Acropora, Isopora, or Cyphastrea spp. The database includes 78 variables, with Sr/Ca, U/Ca, and Ba/Ca being the most frequently measured. Most records measure data over 10 or more years and are at monthly or lower resolution. The GBRCD is machine readable and easily searchable so that users can find records relevant to their research, e.g. by filtering for site name, time period, or coral type. It is publicly available as comma-separated values (CSV) data and metadata files with entries linked by the unique record ID and as Linked Paleo Data (LiPD) files. The GBRCD is publicly available from the NOAA National Center for Environmental Information World Data Service for Paleoclimatology at https://doi.org/10.25921/hqxk-8h74 (Arzey et al., 2024). The intention is to update the GBRCD annually, depending on the availability of relevant new GBR records or submission of legacy records to the GBRCD for archiving. The collection and curation of existing GBR coral research data provide researchers with the ability to analyse common proxies such as Sr/Ca across multiple locations and/or examine regional to reef-scale trends. The database is also suitable for multi-proxy comparisons and combination or composite analyses to determine overarching changes recorded by the proxies. This database represents the first comprehensive compilation of coral records from the GBR. It enables the investigation of multiple environmental factors via various proxy systems for the GBR, northeastern Australia, and potentially the broader Indo-Pacific region.
description: The Great Barrier Reef Coral Skeletal Records Database (GBRCD) is a curated database of coral records. It includes multi-year measurements of coral geochemistry and luminescence signals for corals from the Great Barrier Reef (Australia) region. 
      Provided Keywords: Great Barrier Reef, coral geochemistry, luminescence, trace metals, physical properties.
Email data submissions for this database to: GBRCDsubmissions (at) outlook(dot)com.
This dataset is distributed under a Creative Commons Attribution 4.0 International License (CC BY 4.0; https://creativecommons.org/licenses/by/4.0).
DOI: 10.25921/hqph-wd52
title: NOAA/WDS Paleoclimatology - Wang - Site L20 Northern Quebec - PCMA - ITRDB CANA650

description: Although global and Northern Hemisphere temperature reconstructions are coherent with climate model simulations over the last millennium, reconstructed temperatures tend to diverge from simulations at smaller spatial scales. Yet, it remains unclear to what extent these regional peculiarities reflect region-specific internal climate variability or inadequate proxy coverage and quality. Here, we present a high-quality, millennial-long summer temperature reconstruction for northeastern North America, based on maximum latewood density, the most temperature-sensitive tree-ring proxy. Our reconstruction shows that a large majority (31 out of 44) of the coldest extremes can be attributed to explosive volcanic eruptions, with more persistent cooling following large tropical than extratropical events. These forced climate variations synchronize regional summer temperatures with hemispheric reconstructions and simulations at the multidecadal time scale. Our study highlights that tropical volcanism is the major driver of multidecadal temperature variations across spatial scales.
description: NOAA Template Raw Measurements file added 2022-09-08.
DOI: 10.25921/hme9-q131
title: NOAA/WDS Paleoclimatology - Mašek - 01NS Kokořínsko - PISY - ITRDB CZE036

description: Inter-annual climatically driven growth variability of above-ground biomass compartments (for example, tree stems and foliage) controls the intensity of carbon sequestration into forest ecosystems. However, understanding the differences between the climatic response of stem and foliage at the landscape level is limited. In this study, we examined the climate-growth response of stem and leaf biomass and their relationship for Pinus sylvestris (PISY) and Picea abies (PCAB) in topographically complex landscapes. We used tree-ring width chronologies and time series of the normalized difference vegetation index (NDVI) derived from high-resolution Landsat scenes as proxies for stem and leaf biomass, respectively. We then compared growth variability and climate-growth relationships of both biomass proxies between topographical categories. Our results show that the responses of tree rings to climate differ significantly from those found in NDVI, with the stronger climatic signal observed in tree rings. Topography had distinct but species-specific effects: At moisture-limited PISY stands, stem biomass (tree rings) was strongly topographically driven, and leaf biomass (NDVI) was relatively insensitive to topographic variability. In landscapes close to the climatic optimum of PCAB, the relationship between stem and leaf biomass was weak, and their correlations with climate were often inverse, with no significant effects of topography. Different climatic signals from NDVI and tree rings suggest that the response of canopy and stem growth to climate change might be decoupled. Furthermore, our results hint toward different prioritizations of biomass allocation in trees under stressful conditions which might change allometric relationships between individual tree compartments in the long term.
DOI: 10.25921/h2jf-my91
title: NOAA/WDS Paleoclimatology - Mašek - 02PL Kokořínsko - PISY - ITRDB CZE037

description: Inter-annual climatically driven growth variability of above-ground biomass compartments (for example, tree stems and foliage) controls the intensity of carbon sequestration into forest ecosystems. However, understanding the differences between the climatic response of stem and foliage at the landscape level is limited. In this study, we examined the climate-growth response of stem and leaf biomass and their relationship for Pinus sylvestris (PISY) and Picea abies (PCAB) in topographically complex landscapes. We used tree-ring width chronologies and time series of the normalized difference vegetation index (NDVI) derived from high-resolution Landsat scenes as proxies for stem and leaf biomass, respectively. We then compared growth variability and climate-growth relationships of both biomass proxies between topographical categories. Our results show that the responses of tree rings to climate differ significantly from those found in NDVI, with the stronger climatic signal observed in tree rings. Topography had distinct but species-specific effects: At moisture-limited PISY stands, stem biomass (tree rings) was strongly topographically driven, and leaf biomass (NDVI) was relatively insensitive to topographic variability. In landscapes close to the climatic optimum of PCAB, the relationship between stem and leaf biomass was weak, and their correlations with climate were often inverse, with no significant effects of topography. Different climatic signals from NDVI and tree rings suggest that the response of canopy and stem growth to climate change might be decoupled. Furthermore, our results hint toward different prioritizations of biomass allocation in trees under stressful conditions which might change allometric relationships between individual tree compartments in the long term.
DOI: 10.25921/hf7p-gy65
title: NOAA/WDS Paleoclimatology - Ho - Tonzi Ranch - PISA - ITRDB CA736

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
DOI: 10.25921/hkma-ft31
title: NOAA/WDS Paleoclimatology - Martin Lake, Indiana, Long-Chain Plant Wax N-Alkane Hydrogen Isotope Data Over the Past 2000 Years

description: We compare hydrogen isotopic measurements of long-chain leaf-wax n-alkanes (δ2Hw; C27, C29, and C31) from Martin Lake, Indiana, USA, with a calcite-based reconstruction of the oxygen isotopic composition of precipitation (δ18Op) from the same lake. We observe stable and high δ2Hw during the Common Era (last 2000 years), which we interpret as growing-season precipitation originating mainly from the Gulf of Mexico and Atlantic. During the Little Ice Age (LIA; 1200–1850 CE), δ2Hw values increased by 3–8 ‰, concomitant with a significant decrease in δ18Op values by up to 12.5 ‰. Multiple proxy records for this time indicate persistent growing-season drought. We interpret these relatively high δ2Hw values, as compared to the δ18Op values, as a signal of low relative humidity that resulted in an 2H enrichment in plant source water resulting in high δ2H values through enhanced plant water and/or soil evaporation. These results support the occurrence of low humidity conditions during the LIA in the midcontinental USA that also contributed to the marked decline of regional pre-Columbian Mississippian populations.
description: 2000 year record of plant wax n-alkane hydrogen isotopes from Martin Lake, IN. Provided Keywords: Hydroclimate, Paleoclimate, Common Era, Medieval Climate Anomaly, Current Warm Period
DOI: 10.25921/hmm9-0g93
title: NOAA/WDS Paleoclimatology - Central Great Barrier Reef, Porites sp. Ba/Ca record 1962-2008 CE

description: The biogenic structures of stationary organisms can be effective recorders of environmental fluctuations. These proxy records of environmental change are preserved as geochemical signals in the carbonate skeletons of scleractinian corals and are useful for reconstructions of temporal and spatial fluctuations in the physical and chemical environments of coral reef ecosystems, including The Great Barrier Reef (GBR). We compared multi-year monitoring of water temperature and dissolved elements with analyses of chemical proxies recorded in Porites coral skeletons to identify the divergent mechanisms driving environmental variation at inshore versus offshore reefs. At inshore reefs, water Ba/Ca increased with the onset of monsoonal rains each year, indicating a dominant control of flooding on inshore ambient chemistry. Inshore multi-decadal records of coral Ba/Ca were also highly periodic in response to flood-driven pulses of terrigenous material. In contrast, an offshore reef at the edge of the continental shelf was subject to annual upwelling of waters that were presumed to be richer in Ba during summer months. Regular pulses of deep cold water were delivered to the reef as indicated by in situ temperature loggers and coral Ba/Ca. Our results indicate that although much of the GBR is subject to periodic environmental fluctuations, the mechanisms driving variation depend on proximity to the coast. Inshore reefs are primarily influenced by variable freshwater delivery and terrigenous erosion of catchments, while offshore reefs are dominated by seasonal and inter-annual variations in oceanographic conditions that influence the propensity for upwelling. The careful choice of sites can help distinguish between the various factors that promote Ba uptake in corals and therefore increase the utility of corals as monitors of spatial and temporal variation in environmental conditions.
description: Contributed as part of the Great Barrier Reef Coral Skeletal Records Database (GBRCD).
      Provided Keywords: Great Barrier Reef, coral geochemistry, river discharge, upwelling
DOI: 10.25921/h9ed-1h93
title: NOAA/WDS Paleoclimatology - Wang et al. 2001 Hulu Cave Stalagmite Oxygen Isotope Data

description: Oxygen isotope records of five stalagmites from Hulu Cave near Nanjing bear a remarkable resemblance to oxygen isotope records from Greenland ice cores, suggesting that East Asian Monsoon intensity changed in concert with Greenland temperature between 11,000 and 75,000 years before the present (yr. B.P.). Between 11,000 and 30,000 yr. B.P., the timing of changes in the monsoon, as established with 230Th dates, generally agrees with the timing of temperature changes from the Greenland Ice Sheet Project Two (GISP2) core, which supports GISP2's chronology in this interval. Our record links North Atlantic climate with the meridional transport of heat and moisture from the warmest part of the ocean where the summer East Asian Monsoon originates.
description: Hulu Cave Stalagmite Oxygen Isotope Data and 230Th dating. These data also available as supplementary information for Wang et al. 2001 and Yuan et al. 2004 from www.sciencemag.org. Extended age and isotope data from stalagmite H82 were published by Yuan et al. 2004. Oxygen data between 140.0 and 165.6 mm are from Yuan et al. 2004 and the rest from Wang et al. 2001. The distances have been re-measured by Yuan et al. 2004 and the total distance difference accumulated over 165.6 mm is within 2 mm of the original measurement. This contributes to a slight refinement in the timescale. Depths are relative to the top (youngest surface) of each stalagmite and are measured along the growth axis. Ages are established with 230Th ages, band counting, and as described in the text. "Years BP" refers to years relative to 1950 A.D. 

d13C (y axis) vs d18O (x axis) linear regression results: Data are regressed by individual stalagmite, as well as for the whole data set. Units are in per mil relative to VPDB for both isotope values. Best-fit lines have negative slopes for all groupings except for PD. The best-fit line for PD data has a positive slope; however, R2 is relatively low for this stalagmite. Thus, we observe no strong positive correlations among any groupings, indicating no evidence for kinetic fractionation. 
Stalagmite               Slope     Intercept   Correlation(R2)   #data points
MSD                      -1.23     -14.77         0.629            268
MSL                      -1.93     -20.76         0.387            285
PD                           1       0.39         0.285            149
YT                       -0.42     -10.48         0.235            338
H82                      -0.21      -9.99         0.014            612
MSD+MSL+PD+YT+H82        -0.13      -7.89         0.011           1652
DOI: 10.25921/h0wz-jc67
title: NOAA/WDS Paleoclimatology - Touchan - Alaçam Deresi - PINI - ITRDB TUR057

description: The first large-scale network of 79 tree-ring chronologies in the Eastern Mediterranean and Near East (EMNE; 33°N–42°N, 21°E–43°E) is described and analyzed to identify the seasonal climatic signal in indices of annual ring width. Correlation analysis and cluster analysis are applied to tree-ring data and gridded climate data to assess the climate signal embedded in the network in preparation for climate field reconstructions and formal proxy/model intercomparison experiments. The lengths of the 79 combined chronologies range from 89 to 990 years. The monthly correlations and partial correlations reveal a pervasive positive association with May, June, and sometimes July precipitation, positive correlations with winter and spring (December through April) temperatures, and negative relationships with May through July temperature, although as expected, there are site-to-site exceptions to these general patterns. Cluster analysis suggests three groups of sites based on their association with climate. The chronologies for the EMNE have coherent seasonal precipitation and temperature signals across a fairly broad geographical domain. The predominant signal is a positive growth response to May–June precipitation. Collectively, the findings suggest that the network can be exploited to develop season-specific field reconstructions of precipitation and drought history in the EMNE.
DOI: 10.25921/h0fg-wn32
title: NOAA/WDS Paleoclimatology - Brown fire data from Bathroom Fire, central Oregon - IMPD USBRF002

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: 10.25921/hrhm-gk24
title: NOAA/WDS Paleoclimatology - Chitral, Pakistan Precipitation Reconstruction from 1637-2018 CE

description: Increased flood risks have been projected, but with large uncertainties, in the Kabul River Basin (Afghanistan and Pakistan). To place future changes in a long-term perspective, we produce a 382-year precipitation reconstruction for the basin using seven tree-ring chronologies of old-growth conifers from the Hindu Kush Mountains, a monsoon-shadow area. The reconstruction proves robust over rigorous cross-validations (R2 = 0.60, RE = 0.60, CE = 0.53). The full reconstruction (1637–2018) reveals a steady decline in the low end of the precipitation distribution, implying increasing drought risks. We show that droughts are getting more severe, shorter, and more frequent, interspersed with more frequent pluvials in the past century. Drought risks, compounded with projected flood intensification, pose significant threats for this transboundary river. Therefore, future water management needs to account for both flood and drought risks and be informed by long-term hydroclimatic variability.
description: Precipitation at Chitral, Kabul River Basin (Pakistan) reconstructed from tree rings
     Provided Keywords: dendrochronology, water cycle
DOI: 10.25921/hv3r-cx84
title: NOAA/WDS Paleoclimatology - Fajardo, Puerto Rico Coral Carbon Isotope Data from 1948-2004 CE

description: Tropical small mountainous rivers deliver a poorly quantified, but potentially significant, amount of carbon to the world’s oceans. However, few historical records of land–ocean carbon transfer exist for any region on Earth. Corals have the potential to provide such records, because they draw on dissolved inorganic carbon (DIC) for calcification. In temperate systems, the stable- (d13C) and radiocarbon (Δ14C) isotopes of coastal DIC are influenced by the d13C and Δ14C of the DIC transported from adjacent rivers. A similar pattern should exist in tropical coastal DIC and hence coral skeletons. Here, d13C and Δ14C measurements were made in a 56-year-old Montastraea faveolata coral growing ~1 km from the mouth of the Rio Fajardo in eastern Puerto Rico. Additionally, the d13C and Δ14C values of the DIC of the Rio Fajardo and its adjacent coastal waters were measured during two wet and dry seasons. Three major findings were observed: (1) synchronous depletions of both d13C and Δ14C in the coral skeleton are annually coherent with the timing of peak river discharge, (2) riverine DIC was always more depleted in d13C and Δ14C than seawater DIC, and (3) the correlation of d13C and Δ14C was the same in both coral skeleton and the DIC of the river and coastal waters. These results indicate that coral skeletal d13C and Δ14C are recording the delivery of riverine DIC to the coastal ocean. Thus, coral records could be used to develop proxies of historical land–ocean carbon flux for many tropical regions. Such information could be invaluable for understanding the role of tropical land–ocean carbon flux in the context of land-use change and global climate change.
description: Provided Keywords: coral, radiocarbon, carbon isotopes, paleoceanography, d13C, Delta14C
DOI: 10.15468/dl.4nd44n
title: Occurrence Download

description: A dataset containing 75603 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Continent is North America",
 "CoordinateUncertaintyInMeters 0.0-1000.0",
 "TaxonKey is Alliaria petiolata"
 ]
}

 The dataset includes 75603 records from 6 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0020849-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/hxbm-0815
title: NOAA/WDS Paleoclimatology - Inga-Guillen - Matereni - JGNE - ITRDB PER003

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:  Rings were dated according to the Southern Hemisphere convention of assigning the year based on when ring formation began (Schulman, 1956). NOAA Template Raw Measurements file added 2022-04-04.
DOI: 10.15468/dl.qtacya
title: Occurrence Download

description: A dataset containing 7 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Polyplacophora)",
 "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((-60 -60,-50 -60,-50 -50,-60 -50,-60 -60))"
 ]
}

 The dataset includes 7 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0020868-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.