cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/ak8f-x272
title: NOAA/WDS Paleoclimatology - Stevenson - Missouri Oklahoma and Gulf Railroad - QUPA - ITRDB OK041

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description:  NOAA Template Chronology file added 2018-12-31. NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/a7s0-dt56
title: NOAA/WDS Paleoclimatology - Umbanhowar fire data from Doroo Nuur, western Mongolia - IMPD MNDRN001

description: Fires are common in grassland regions of the world, and the frequency and severity of fire is linked to climate-driven changes in fuel loads. Western Mongolia is dominated by grasslands but the fire history of this region is largely unknown. We reconstructed modern fire (48 lakes) and historical fires (9 lakes) using sediment charcoal. Modern fuel loads were estimated using a combination of clipped plots, satellite-based estimates of annual aboveground net primary productivity (NPP) and NPP modeled from annual temperature and precipitation. Loss-on-ignition and environmental magnetics of lake sediments were analyzed as proxies for climate. We found little evidence for modern or historical fire in the landscape, as charcoal was absent from the surface sediments of 34 of 48 lakes. Charcoal influxes were uniformly low, averaging from 0.002 to 0.028 mm2/cm2 per yr, over the past 1200 years at nine lakes, and the past 6000-5000 years at two of the lakes with longer sediment records. In the modern landscape, livestock grazing has eliminated most of the fuels necessary to carry a fire, as measured fuel loads (27.3+-4.9 g/m2) were only ~20% of aboveground annual NPP estimated using MODIS Imagery or modeled from climate data. The historical absence of fire may indicate a longer history of intensive grazing than sometimes assumed, and cultural prohibitions against burning may also play a role. Regional summary indicated a >50% decrease in charcoal influxes since AD 1600 at most sites which may be related to lower temperatures or greater aridity during the 'Little Ice Age'. Alternatively this decrease in charcoal influxes may reflect increases in livestock numbers or increased local concentrations because of restrictions on the movement of animals coincident with the establishment of Manchu rule in the late seventeenth century.
DOI: 10.25921/amg6-q489
title: NOAA/WDS Paleoclimatology - Greenland Cosmogenic Exposure Ages Database

description: The last deglaciation is the most recent interval of large-scale climate change that drove the Greenland ice sheet from continental shelf to within its present extent. Here, we use a database of 645 published 10Be ages from Greenland to document the spatial and temporal patterns of retreat of the Greenland ice sheet during the last deglaciation. Following initial retreat of its marine margins, most land-based deglaciation occurred in Greenland following the end of the Younger Dryas cold period (12.9-11.7 ka). However, deglaciation in east Greenland peaked significantly earlier (13.0-11.5 ka) than that in south Greenland (11.0-10 ka) or west Greenland (10.5-7.0 ka). The terrestrial deglaciation of east and south Greenland coincide with adjacent ocean warming. 14C ages and a recent ice-sheet model reconstruction do not capture this progression of terrestrial deglacial ages from east to west Greenland, showing deglaciation occurring later than observed in 10Be ages. This model-data misfit likely reflects the absence of realistic ice-ocean interactions. We suggest that oceanic changes may have played an important role in driving the spatial-temporal ice-retreat pattern evident in the 10Be data.
description: Database of all cosmogenic exposure ages in Greenland (as of May 2016), including sample metadata, original published age, and information necessary for re-calculating ages using the CRONUS online calculator (hess.ess.washington.edu).  In addition, ages calculated using the Northeast North American (NENA) and Arctic Production rates are included.
DOI: 10.25921/adqm-9g21
title: NOAA/WDS Paleoclimatology - Eronen - Lieksa Koivujoki - PISY - ITRDB FINL005

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Chronology file added 2018-12-19. NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/avy7-6w80
title: NOAA/WDS Paleoclimatology - Hessl fire data from Terkhin Tsagaan Nuur West - IMPD MNTSW001

description: Recent increases in wildland fire, warming temperatures, and land use change have coincided in many forested regions, making it difficult to parse causes of elevated fire activity. Here we use 20 multicentury fire scar chronologies (464 fire scar samples) from Mongolia to evaluate the role of climate forcing of fire in the context of livestock grazing and minimal fire suppression. We observe no change in fire return intervals post-1900; however, since the 1500s, periods of drought are coincident with more fire and shorter fire return intervals. We observe same year and some antecedent year effects of dought on fire, a pattern typical of semiarid forests elsewhere. During the instrumental period, drought remains an important drive of fire however, limited fire activity in recent decades may be due to the coincidence of drought and intensive grazing that have synergized to reduce fuel continuity and fire spread.
DOI: 10.25921/amx0-jt43
title: NOAA/WDS Paleoclimatology - Kairaitis - Gelvonai - QURO - ITRDB LITH030

description: Pedunculate oak (Quercus robur L.) is one of the widely used and dendrochronologically investigated species in Europe. Still, it is a problematical dating object if its outermost section is missing partly or totally. Thus, we need sapwood estimation of living trees. As sapwood amount varies geographically, numbers of sapwood rings have been published for different regions in Europe but no such estimation has been done for the Baltic States yet. Therefore, this paper deals with the estimation of pedunculate oak sapwood growing in the eastern Baltic region, i.e. in Finland, Estonia, Latvia, and Lithuania.

In total, 668 oak core samples of living trees from 43 stands were investigated. Ring widths were measured and the number of sapwood rings was determined according to two criteria: difference of colour and absence of tyloses in earlywood vessels. The samples were divided into two sets, according to the tH-values between site chronologies and the major geobotanical sub-provinces. Thus, the nine Finnish and western Estonian sites were attributed to the western region and the 34 eastern Estonian, Latvian and Lithuanian sites to the eastern region.

As the result of a statistical analysis, we explain that the number of oak sapwood rings ranges from 4.09 to 20.85 and 6.45 to 18.02 within 95% confidence limits in the western and eastern regions, respectively. For the three Baltic countries and southern Finland in general, we recommend to consider a sapwood estimate of 6.18-18.71 rings. Regarding earlier studies, the general European trend of decreasing sapwood ring number towards the east was confirmed. A geographical pattern of eastward decrease of the median sapwood ring number was noticed in the Baltics as well. The chronology based upon 668 samples of living oak trees from all sites covered the period of 1631-2008.
description: NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/ac8f-t589
title: NOAA/WDS Paleoclimatology - ITASE 230 Year Antarctic Ice Core Snow Accumulation Data

description: Predictions concerning Antarctica's contribution to sea level change have been hampered by poor knowledge of surface mass balance. Snow accumulation is the most direct climate indicator and has important implications for paleoclimatic reconstruction from ice cores. Snow accumulation measurements (stake, core, snow radar) taken along a 500-km transect crossing Talos Dome (East Antarctica) have been used to assess accumulation signals and the representativeness of ice core records. Stake readings show that accumulation hiatuses can occur at sites with accumulation rates below 120 kg m-2 yr-1. Differences between cores and stakes can lead to statistical misidentification of annual layers determined from seasonal signals at sites with accumulation rates below 200 kg m-2 yr-1 because of nondetection of higher and lower values. Achieving ±10% accuracy in the reconstruction of snow accumulation from single cores requires high accumulation (750 kg m-2 yr-1). Low-accumulation sites are representative if cumulative rates computed over several years are used to reach the 750 kg m-2 yr-1 threshold. Temporal variability of accumulation over the last two centuries shows no significant increase in accumulation. Wind-driven processes are a fundamental component of surface mass balance. Spatial variations in accumulation are well correlated with surface slope changes along the wind direction and may exceed 200 kg m-2 yr-1 within 1 km. Wind-driven sublimation rates are less than 50 kg m-2 yr-1 in plateau areas and up to 260 kg m-2 yr-1 in slope areas and account for 20-75% of precipitation, whereas depositional features are negligible in surface mass balance.
description: Snow accumulation data from 3 ITASE ice cores along a north-south transect collected in the Talos Dome area of East Antarctica.
DOI: 10.25921/a7z6-hw85
title: NOAA/WDS Paleoclimatology - Cook - Mammoth Cave Recollect - QUAL - ITRDB KY004

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Chronology file added 2018-12-20. NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/avz2-b936
title: NOAA/WDS Paleoclimatology - Gulf of Alaska Alkenone paleotemperatures, d18Oseawater reconstructions, benthic oxygen isotopes and benthic faunal data for the past 18,000 years

description: Marine sediments from the North Pacific document two episodes of expansion and strengthening of the subsurface oxygen minimum zone (OMZ) accompanied by seafloor hypoxia during the last deglacial transition. The mechanisms driving this hypoxia remain under debate. We present a new high-resolution alkenone palaeotemperature reconstruction from the Gulf of Alaska that reveals two abrupt warming events of 4–5 degrees Celsius at the onset of the Bølling and Holocene intervals that coincide with sudden shifts to hypoxia at intermediate depths. The presence of diatomaceous laminations and hypoxia-tolerant benthic foraminiferal species, peaks in redox-sensitive trace metals, and enhanced 15N/14N ratio of organic matter, collectively suggest association with high export production. A decrease in 18O/16O values of benthic foraminifera accompanying the most severe deoxygenation event indicates subsurface warming of up to about 2 degrees Celsius. We infer that abrupt warming triggered expansion of the North Pacific OMZ through reduced oxygen solubility and increased marine productivity via physiological effects; following initiation of hypoxia, remobilization of iron from hypoxic sediments could have provided a positive feedback on ocean deoxygenation through increased nutrient utilization and carbon export. Such a biogeochemical amplification process implies high sensitivity of OMZ expansion to warming.
description: Alkenone paleotemperatures, d18Oseawater reconstructions, and benthic faunal data in this worksheet are from jumbo piston core EW0408-85JC in the Gulf of Alaska. The age model for this core is previously published in Davies-Walczak et al., 2014 (DOI: 10.1016/j.epsl.2014.04.004). Additional benthic oxygen isotope data is provided from cores EW0408-87JC and EW0408-26JC in the Gulf of Alaska, along with the radiocarbon chronology for EW0408-87JC. Source reference for EW0408-26JC age model- Praetorius, S.K. and A.C., Science, 2014 (DOI: 10.1126/science.1252000). Please cite original reference when using this data and consult original publication for details on radiocarbon chronology. Sediment concentrations (K37's mg/g) are not reported for a small number of samples for which analysis of the recovery standard was compromised (indicated with NAN).
     Provided Keywords: ocean hypoxia, deglacial, oxygen minimum zone,  alkenone paleotemperature
DOI: 10.25921/aa5h-8703
title: NOAA/WDS Paleoclimatology - Peterson - Mount Rainier Low - ABLA - ITRDB WA110

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: 10.25921/a0as-1044
title: NOAA/WDS Paleoclimatology - Central Equatorial Pacific Dust Flux, Productivity and d15N Data for 0-27ka

description: The “major” nutrients for phytoplankton growth (nitrogen, phosphorus, and silicon) are supplied to the surface waters of the Equatorial Pacific (EP) by wind-driven upwelling along the equator. Their consumption by phytoplankton is thought to be limited in part by the low concentrations of the critical micro-nutrient iron. Greater atmospheric dust deposition may have fertilized the EP with iron during the Last Glacial Period (LGP, 17-27,000 years ago). Here we present meridional transects of dust (232Th), phytoplankton productivity (opal, 231Pa/230Th, excess Ba), and the degree of nitrate consumption (foraminifera-bound d15N) from the Central EP for Holocene and LGP time slices. Despite two- to three-fold greater dust deposition in the Central EP, productivity was the same or lower during the LGP compared to the Holocene, and the degree of nitrate consumption was unchanged. These biogeochemical findings suggest that the relatively greater ice age dust fluxes were inadequate to drive significant iron fertilization in the Central EP, which may be because the absolute rate of dust deposition in the LGP, despite being greater than the Holocene rate, was still very low. The lower productivity coupled with unchanged nitrate consumption suggests lower subsurface major nutrient concentrations in the Central EP during the LGP. As these nutrients are today dominantly sourced from the Subantarctic Zone of the Southern Ocean, the Central EP data are consistent with more complete nutrient consumption in the Subantarctic, apparently because of iron fertilization in that region, where absolute dust fluxes were much higher. Thus, ice age iron fertilization ultimately worked to lower, not raise, Equatorial Pacific productivity.
description: Site Information:
 MC # BB # Lat(N) Long(W) Depth(m)
 14 13 -0.22 156 3049
 21 20 1.27 157.3 2850
 26 25 2.46 159.4 3545
 29 28 2.97 159.2 3152
 33 32 5.2 160.4 2933
 39 36 6.83 161 2859
         Provided Keywords: Holocene, Last Glacial Period, dust, productivity, Th isotopes, opal, barium
DOI: 10.15468/dl.wrup78
title: Occurrence Download

description: A dataset containing 756129 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Perca fluviatilis Linnaeus, 1758"
 ]
}

 The dataset includes 756129 records from 351 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0219469-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.u2qqyj
title: Occurrence Download

description: A dataset containing 252 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Türkiye",
 "TaxonKey is Papaver rhoeas L."
 ]
}

 The dataset includes 252 records from 17 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0260935-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kt9afu
title: Occurrence Download

description: A dataset containing 651 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Quercus cornelius-mulleri Nixon & K.P.Steele"
 ]
}

 The dataset includes 651 records from 17 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014176-180824113759888/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.hsvxuc
title: Occurrence Download

description: A dataset containing 685 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Country is United Kingdom of Great Britain and Northern Ireland",
 "OccurrenceStatus is Present",
 "TaxonKey is Cortaderia Stapf"
 ]
}

 The dataset includes 685 records from 41 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0238563-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ms6s5s
title: Occurrence Download

description: A dataset containing 205 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "BasisOfRecord is Human Observation",
 "BasisOfRecord is Specimen",
 "BasisOfRecord is Unknown evidence"
 ]
 },
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Faxonius neglectus (Faxon, 1885)",
 "Year 1950-2021"
 ]
}

 The dataset includes 205 records from 6 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0257118-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.94haxt
title: Occurrence Download

description: A dataset containing 148163 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 {
 "or" : [
 "Continent is Asia",
 "Continent is Europe"
 ]
 },
 "TaxonKey is Populus L."
 ]
}

 The dataset includes 148163 records from 56 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0260936-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.a7lzmv
title: Occurrence Download

description: A dataset containing 2091 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "Country is Chile",
 "Country is Argentina"
 ]
 },
 "TaxonKey is Tadarida brasiliensis (I.Geoffroy, 1824)"
 ]
}

 The dataset includes 2091 records from 30 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014176-181003121212138/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.xvwxbn
title: Occurrence Download

description: A dataset containing 164357 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is The Himalayan Uplands Plant database (HUP Version 1)"
 ]
}

 The dataset includes 164357 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0237979-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.9fbwqc
title: Occurrence Download

description: A dataset containing 43804 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Symplocaceae"
 ]
}

 The dataset includes 43804 records from 430 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0263972-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kttwjl
title: Occurrence Download

description: A dataset containing 708 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-93.41978 17.10606,-93.25129 17.10606,-93.25129 17.19685,-93.41978 17.19685,-93.41978 17.10606))",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 708 records from 43 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014176-181108115102211/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.8ubmhz
title: Occurrence Download

description: A dataset containing 685 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Portugal",
 {
 "or" : [
 "DatasetKey is iNaturalist Research-grade Observations",
 "DatasetKey is Observation.org, Nature data from around the World"
 ]
 },
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "MediaType is Image",
 "TaxonKey is Erebidae"
 ]
}

 The dataset includes 685 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0215229-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.zdxbvz
title: Occurrence Download

description: A dataset containing 23686 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "DatasetKey is EOD – eBird Observation Dataset",
 "Geometry POLYGON Z((-22.02269 64.16395 0,-21.94364 64.12079 0,-21.95248 64.09119 0,-21.94259 64.08548 0,-21.93686 64.08668 0,-21.90346 64.08633 0,-21.89097 64.0917 0,-21.88531 64.09604 0,-21.87078 64.09701 0,-21.85053 64.09554 0,-21.82828 64.08975 0,-21.81135 64.09491 0,-21.79928 64.10198 0,-21.79567 64.10759 0,-21.79771 64.12023 0,-21.78785 64.12696 0,-21.78051 64.14117 0,-21.76969 64.15467 0,-21.78883 64.15564 0,-21.86484 64.15535 0,-22.02269 64.16395 0))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "License is CC0 1.0",
 "OccurrenceStatus is Present",
 "Year 2015-2019"
 ]
}

 The dataset includes 23686 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0262658-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.