cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/2syx-b667
title: NOAA/WDS Paleoclimatology - Mackay-region, Great Barrier Reef, Porites spp. rare earth element and yttrium concentrations from select years 1950-2002 CE

description: Rare earth element and yttrium (REY) concentrations were measured from two nearshore Porites sp. corals collected from Round Top Is. and Keswick Is., at 5 km and 32 km offshore from Mackay, Queensland, on the southern Great Barrier Reef, Australia. The REY patterns from the Round Top coral differed from the Keswick coral in 5 respects: (1) greater REY concentrations; (2) preferentially enriched light rare earth elements (LREEs); (3) reduced slope across the heavy rare earth elements (HREEs); (4) more negative cerium (Ce) anomaly; and (5) lower yttrium (Y) to holmium (Ho) ratios. These patterns suggest greater terrestrial exposure and higher biological productivity at Round Top Is. Total abundance of REY in both corals increased over time between 1950 and 2002. The rate of increase at Round Top Is. was 3-fold greater than at Keswick Is., thus the innermost site was likely more influenced by weathering from rapid agricultural expansion in the adjacent Pioneer River catchment. The Y/Ho ratio decreased over time in both corals, but as the coral values were substantially higher than ambient seawater, more research is suggested to identify the cause.
description: Contributed as part of the Great Barrier Reef Coral Skeletal Records Database (GBRCD).
       Provided Keywords: Great Barrier Reef, Coral Geochemistry, Water Quality, Rare Earth Elements
DOI: 10.25921/27zx-f176
title: NOAA/WDS Paleoclimatology - Amino Acid d13C and d15N Data from Monterey Bay, California from 1998-2004 CE

description: Recent implementation of compound-specific stable isotopes of amino acids (CSI-AA) to proteinaceous deep-sea corals opens a new realm of high-fidelity reconstructions of biogeochemical and ecological changes in the ocean. However, underlying these CSI-AA paleoceanographic applications are a series of fundamental assumptions, which hold first that baseline-proxy AA isotope values fixed at the base of food webs represent integrated d13C and d15N values of primary production, and second they stay unaltered during subsequent export and incorporation from particles into corals. Here, we explore the first long-term d13C and d15N CSI-AA data on a sediment trap time series together with contemporaneous deep-sea bamboo corals (Isidella sp.) in the California margin to for the first time directly test these assumptions. We found that the isotope values of essential (d13CEAA) and source AAs (d15NPhe) in sinking particles can quantitatively track bulk d13C and d15N values of export and primary production. These CSI-AA baseline proxies varied independently of carbon flux, trophic position (TPCSI-AA), and microbial degradation and resynthesis, suggesting good preservation in sinking particles. Paired comparisons between sinking particles and deep-sea corals revealed only small elevations of d13CEAA (~2 per mil) and d15NPhe (~1 per mil) in the coral skeletons, near the magnitude of analytical uncertainty. We hypothesize the difference in d13CEAA is due to the geographic offset in d13C values of primary production expected between the (more offshore) sediment trap site and (more onshore) coral specimens, whereas the d15NPhe offset is more likely related to a minor trophic fractionation. Using the derived empirical models, we demonstrated that CSI-AA applied to proteinaceous deep-sea corals can reconstruct bulk d15N values of export and primary production, baseline nitrogen d15N, and exported TPCSI-AA values with remarkable fidelity. Together, these findings improve our understanding of AA isotope behaviors in modern and paleoarchives and provide a strong field support for applying the rapidly evolving CSI-AA-based tools to paleoceanographic studies.
DOI: 10.25921/2tfd-ns38
title: NOAA/WDS Paleoclimatology - Touchan - Ehden Reserve - CDLI - ITRDB LBN007

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: 10.25921/2p3k-1a67
title: NOAA/WDS Paleoclimatology - Mackay-region, Great Barrier Reef, Porites spp. Ba/Ca and luminescence 1945-2003 CE

description: Coral core records, combined with measurements of coral community structure, were used to assess the long-term impact of multiple environmental stressors on reef assemblages along an environmental gradient. Multiple proxies (luminescent lines, Ba/Ca, d15N) that reflect different environmental conditions (freshwater discharge, sediment delivery to the nearshore, nutrient availability and transformations) were measured in Porites coral cores collected from nearshore reefs at increasing distance from the intensively agricultural region of Mackay (Queensland, Australia). The corals provide a record (1968–2002) of the frequency and intensity of exposure to terrestrial runoff and fertilizer-derived nitrogen and were used to assess how the present-day coral community composition may have been influenced by flood-related disturbance. Reefs closest to the mainland (5–32 km offshore) were characterized by low hard coral cover (=10%), with no significant differences among locations. Distinct annual luminescent lines and elevated Ba/Ca values (4.98 ± 0.63 µmol mol-1; mean ± SD) in the most inshore corals (Round Top Island; 5 km offshore) indicated chronic, sub-annual exposure to freshwater and resuspended terrestrial sediment that may have historically prevented reef formation. By contrast, corals from Keswick Island (32 km offshore) indicated episodic, high-magnitude exposure to Pioneer River discharge during extreme flood events (e.g., 1974, 1991), with strongly luminescent lines and substantially enriched coral skeletal d15N (12–14‰). The reef assemblages at Keswick and St. Bees islands were categorically different from all other locations, with high fleshy macroalgal cover (80.1 ± 7.2% and 62.7 ± 7.1%, respective mean ± SE) overgrowing dead reef matrix. Coral records from Scawfell Island (51 km offshore) indicated little exposure to Pioneer catchment influence: all locations from Scawfell and further offshore had total hard and soft coral cover comparable to largely undisturbed nearshore to middle shelf reefs of the southern Great Barrier Reef.
description: Contributed as part of the Great Barrier Reef Coral Skeletal Records Database (GBRCD).
     Provided Keywords: Great Barrier Reef, Coral Geochemistry, Water Quality
DOI: 10.25921/2t4n-9442
title: NOAA/WDS Paleoclimatology - Taylor Dome, Antarctica, High Resolution Microparticle Concentration and Size Distribution Data for the last ~230,000 years

description: Records of past temperature, precipitation, atmospheric trace gases, and other aspects of climate and environment derived from ice cores drilled on glaciers and ice caps around the world.  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.

description: The 554-m long Taylor Dome (Antarctica) core was drilled to bedrock in 1994 along with an additional 6 cm of basal debris. Taylor Dome is a small East Antarctic ice dome at the head of Taylor Valley, Southern Victoria Land. (77°47'47'' S; 158°43'26" E, elevation 2365 m) The isotope record was published by Grootes et al., Quaternary Research, 1999.  The records extends beyond 130,000, possibly to MIS 8. Below are the concentration and size distribution of insoluable particles measured using a Coulter Counter (TA2 and Multisizer various models) at Ohio State University (Mosley-Thompson) The sample volumes are for a 50 ul sample unless inidcated otherwise. NOTE: the particle counts are for the volume of sample indicated by the sample volume indicator. Extract the st9810 time scale from  https://www.ncei.noaa.gov/access/paleo-search/study/2418
DOI: 10.25921/2snf-hg79
title: NOAA/WDS Paleoclimatology - Mašek - 18VA Kokořínsko - PISY - ITRDB CZE051

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: 10.25921/2q93-1j31
title: NOAA/WDS Paleoclimatology - Mašek - 24VA Šumava - PCAB - ITRDB CZE057

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: 10.25921/2kfx-d452
title: NOAA/WDS Paleoclimatology - Mašek - 35VA Šumava - PCAB - ITRDB CZE068

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: 10.25921/23m8-9z47
title: NOAA/WDS Paleoclimatology - Global Ocean Surface Sediment Compilation of Thorium Isotopes and Trace Metals

description: Oxic pelagic clays are an important component of seafloor sediment that may hold valuable information about past ocean chemistry due to their affinity for and accumulation of biogeochemically important metals. We present a new approach to calculating site-specific sedimentation rates (SRs) by comparing authigenic sediment thorium isotope compositions (230Th/232Th) to seawater dissolved 230Th/232Th in a suite of deep (>3,000 m) pelagic core sites. We extracted the authigenic sediment fraction using an HHAc leach protocol, which major element chemistry (Al, Mn, Fe, Ti) suggested was less affected by lithogenic contamination than the HCl leach. Four different methods were tested for extracting the appropriate initial 230Th/232Th from seawater: using either the nearest water column station (methods 1 and 2) or a regionally averaged profile (methods 3 and 4) and using either the bottommost profile measurement (methods 1 and 3) or linear regression of the profile and extrapolation to the seafloor (methods 2 and 4). Method 3 outperformed the other methods in reconstructing previously published SRs from pelagic clays in the North Pacific. The new thorium-based SRs were then combined with estimates from the total sediment thickness on ocean crust and non-lithogenic cobalt accumulation to determine the best estimates for SRs of oxic pelagic clays. The Pacific has the lowest SR (median 0.28 cm/kyr), while the Atlantic is higher (median 0.46 cm/kyr) and the Indian Ocean is highest (median 0.75 cm/kyr). These new estimates are consistent with the expected spatial patterns of sedimentation, but they revise the absolute SR values downward from available gridded SR maps.
DOI: 10.25921/2dnp-gv97
title: NOAA/WDS Paleoclimatology - Stoykova et al. 2008 Duhlata Cave, Bulgaria 243KYr Speleothem Luminescence Data

description: We have confirmed the solar origin of insolation cycles of 11,500, 4400, 3950, 2770, 2500, 2090, 1960, 1670, 1460, 1280, 1195, 1145, 1034, 935, 835, 750 and 610 yrs found in speleothem luminescence by their presence in other indices of the solar wind. The 11,500-yr solar cycle can produce climatic variations similar to those caused by the orbital variations.We discovered a sub-annual cycle of 27 days in one very high-resolution speleothem proxy paleoclimatic record, attributed to solar rotation, which causes the periodic appearance of active zones on the visible solar surface, which are the major emitters of solar wind. Solar wind modulates cosmic ray flux at the Earth, while cosmic rays influence the atmospheric transparency, thus producing a multiplication of solar variations in insolation. Small variations of the solar activity can produce a measurable influence on insolation.
description: Solar insolation luminescence proxy record from a flowstone from Duhlata Cave, Bulgaria for 0 to 243,500 B.P.  Solar insolation is presented by Optical Density of Luminescence (ODL) in decimal logarithm relative units. Experimental Solar Insolation TIMS U/Th dated record registered at the Earth's surface to be used instead of the theoretical Milankovich curves of the orbital variations of the Solar Insolation. Duhlata Cave location: 42.48333°N, 23.18333°E; ~940 m elevation.

Additional data file contains extreme resolution (2 px/day) Solar luminosity luminescence proxy record from a stalagmite from Cold Water Cave, Iowa, USA for 5 years about 1000 B.P. Cold Water Cave location: 43°10'55" N, 91°51'59" W, 370 m elevation
DOI: 10.15468/dl.3xhxy3
title: Occurrence Download

description: A dataset containing 32 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is (Table 1) Proportion of Toxoplasma gondii seropositive arctic foxes (Alopex lagopus) by age group and geographic area"
 ]
}

 The dataset includes 32 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003960-180824113759888/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wpqtry
title: Occurrence Download

description: A dataset containing 8 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is (Table 1) Proportion of Toxoplasma gondii seropositive arctic foxes (Alopex lagopus) by age group and geographic area"
 ]
}

 The dataset includes 8 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032049-160910150852091/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.m86db4
title: Occurrence Download

description: A dataset containing 9 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Justicia dispar Merr."
 ]
}

 The dataset includes 9 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032093-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.oiupes
title: Occurrence Download

description: A dataset containing 32 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is (Table 1) Proportion of Toxoplasma gondii seropositive arctic foxes (Alopex lagopus) by age group and geographic area"
 ]
}

 The dataset includes 32 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0043734-180508205500799/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wx2tfe
title: Occurrence Download

description: A dataset containing 12 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Megapurpuricenus magnificus (LeConte, 1875)"
 ]
}

 The dataset includes 12 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0219198-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.6uppx7
title: Occurrence Download

description: A dataset containing 8 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is (Table 1) Proportion of Toxoplasma gondii seropositive arctic foxes (Alopex lagopus) by age group and geographic area"
 ]
}

 The dataset includes 8 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032052-160910150852091/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ftcmtk
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Crioprosopus nieti Chevrolat, 1857"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0219199-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.gh77mw
title: Occurrence Download

description: A dataset containing 533 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Acacia bancroftiorum Maiden"
 ]
}

 The dataset includes 533 records from 28 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032095-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.jmprz0
title: Occurrence Download

description: A dataset containing 32 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is (Table 1) Proportion of Toxoplasma gondii seropositive arctic foxes (Alopex lagopus) by age group and geographic area"
 ]
}

 The dataset includes 32 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0043750-180508205500799/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.5rlsr1
title: Occurrence Download

description: A dataset containing 8 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is (Table 1) Proportion of Toxoplasma gondii seropositive arctic foxes (Alopex lagopus) by age group and geographic area"
 ]
}

 The dataset includes 8 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032054-160910150852091/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.z98byf
title: Occurrence Download

description: A dataset containing 94 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Isodendrion longifolium A.Gray"
 ]
}

 The dataset includes 94 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032096-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.