cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/3rv3-r195
title: NOAA/WDS Paleoclimatology - Wiles - McGinnis Trail Update - TSME - ITRDB AK205

description: Ring-width (RW) records from the Gulf of Alaska (GOA) have yielded a valuable long-term perspective for North Pacific changes on decadal to longer timescales in prior studies but contain a broad winter to late summer seasonal climate response. Similar to the highly climate-sensitive maximum latewood density (MXD) proxy, the blue intensity (BI) parameter has recently been shown to correlate well with year-to-year warm-season temperatures for a number of sites at northern latitudes. Since BI records are much less labour intensive and expensive to generate than MXD, such data hold great potential value for future tree-ring studies in the GOA and other regions in mid- to high latitudes. Here we explore the potential for improving tree-ring-based reconstructions using combinations of RW- and BI-related parameters (latewood BI and delta BI) from an experimental subset of samples at eight mountain hemlock (Tsuga mertensiana) sites along the GOA. This is the first study for the hemlock genus using BI data. We find that using either inverted latewood BI (LWBinv) or delta BI (DB) can improve the amount of explained temperature variance by > 10 % compared to RW alone, although the optimal target season shrinks to June–September, which may have implications for studying ocean–atmosphere variability in the region. One challenge in building these BI records is that resin extraction did not remove colour differences between the heartwood and sapwood; thus, long term trend biases, expressed as relatively warm temperatures in the 18th century, were noted when using the LWBinv data. Using DB appeared to overcome these trend biases, resulting in a reconstruction expressing 18th–19th century temperatures ca. 0.5 °C cooler than the 20th–21st centuries. This cool period agrees well with previous dendroclimatic studies and the glacial advance record in the region. Continuing BI measurement in the GOA region must focus on sampling and measuring more trees per site (> 20) and compiling more sites to overcome site-specific factors affecting climate response and using subfossil material to extend the record. Although LWBinv captures the inter-annual climate signal more strongly than DB, DB appears to better capture long-term secular trends that agree with other proxy archives in the region. Great care is needed, however, when implementing different detrending options and more experimentation is necessary to assess the utility of DB for different conifer species around the Northern Hemisphere.
DOI: 10.25921/3d3a-j673
title: NOAA/WDS Paleoclimatology - Touchan - Çal Dağı - PISY - ITRDB TUR065

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: 10.13140/rg.2.2.16538.44483
title: Arabidopsis thaliana gene for porphobilinogen deaminase
DOI: 10.25921/3nkr-jv14
title: NOAA/WDS Paleoclimatology - Villalba - Rio Horqueta - RHJ - JGAU - ITRDB ARG155

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: 10.25921/3xt9-6y38
title: NOAA/WDS Paleoclimatology - Amedee Lighthouse - Stable Isotope Data

description: A 335 year stable isotope record from a New Caledonia coral (22 degrees S, 166 degrees E) helps fill a large gap in historical climate reconstructions. Although the long-term cord delta(18)O-based sea surface temperature (SST) trend is one of warming, there are notable decadal fluctuations, especially in the early 18th and early 19th centuries. Mean annual SSTs between 1658 and 1900 are estimated to be similar to 0.3 degrees C lower than the 20th century average, with interdecadal excursions of 0.5 degrees-0.8 degrees C. Time series analyses of the coral isotope record reveals significant concentrations of variance in the El Nino band; an inderdecadal spectral peak is present, but its robustness requires additional statistical evaluation. A secular but irregular decrease in cord delta(13)C values begins in the mid-1800s and may reflect the anthropogenic perturbation of the carbon reservoir. These and other results indicate that the New Caledonia coral isotope record is a valuable source of information on southwest Pacific climate history.
description: Coral collected live in ~3m of water in September of 1992. We sampled the coral at two levels of sampling density. The upper 40 years of the coral was sampled at 12 samples/density-band couplet (dbc). The remainder of the coral was sampled at 4 samples/dbc. Calendar year assignments based on integrated use of density-bands and observed SST measurements. Precision of isotopic measurements (±2) was monitored by daily analyses of a powdered calcite standard (NBS-20) and was better than 0.08 per mil for both oxygen and carbon. The average standard deviation of forty-six replicate analyses of coral samples is 0.10 per mil for oxygen and 0.07 per mil carbon. Values are reported in standard notation relative to VPDB after correction for the 17O contribution.
DOI: 10.25921/3x8y-ny44
title: NOAA/WDS Paleoclimatology - Verschuren - Windthrown Trees, Research Plot, Sonian Forest - FASY - ITRDB BEL002

description: Common beech (Fagus sylvatica) is one of the most important deciduous tree species in European forests. However, climate-change-induced drought may threaten its dominant position. The Sonian Forest close to Brussels (Belgium) is home to some of the largest beech trees in the world. This UNESCO world heritage site is famous for its high density of very large beech trees as a result of its climatic suitability, fertile soil conditions, and past management. Here we utilized tree-ring data from increment cores to investigate the growth of these old and monumental beech trees, evaluating their growth trends, response to past climate, and the effect of mast years on 39 living and 16 recently wind-thrown trees. Our analysis reveals that the sampled trees were generally sensitive to spring and summer droughts but recovered quickly after such an extreme climatic event. The growth trend of living trees has remained high and only shows a slight, statistically insignificant, decline over the past 50 years. Although the overall growth rate remains strong (BAI 50 cm2/year), the past five decades have shown strong inter-annual growth variations due to frequent and more intense droughts combined with an increased frequency of mast years. We also found notable differences in growth patterns between the living trees and those that had recently been wind-thrown. While there were no significant differences between living and wind-thrown trees in response to droughts, heatwaves, or mast years when examining year-to-year growth changes, the wind-thrown trees did exhibit considerably lower overall growth rates and a significant downward trend in growth (BAI −0.57 cm2/year). This difference in growth trends has been apparent since at least the 1980s. Overall, the findings of this study can provide valuable insights for understanding the long-term dynamics of lowland beech forests and their responses to climate change.
description: Trees that have recently been windthrown.
DOI: 10.25921/3gst-m381
title: NOAA/WDS Paleoclimatology - Southeastern Pacific Ocean Geochemistry and Mass Accumulation Data during the Holocene

description: Changes in Southern Ocean biological pump efficiency are frequently invoked as a source of glacial/interglacial CO2 variability. It was recently suggested that Southern Ocean biological pump weakening also contributed to Holocene CO2 increase. Here we test the causes and downstream effects of biological pump inefficiency during the Holocene. We first provide evidence that a southward shift of the South Westerly Winds, was likely the cause of increasing upwelling in the Southern Ocean leading to local biological pump weakening as reflected in fossil-bound δ15N. We then introduce a series of ultra-high resolution (6 m/ky) productivity records from the Chilean Margin to determine the fate of Southern Ocean nutrients. A compilation of records from Pacific sites supports export and complete consumption of preformed Southern Ocean nutrients, which might have reduced the contributions of Southern Ocean marine source to the Holocene increase in atmospheric CO2.
description: Provided Keywords: XRF
DOI: 10.13140/rg.2.2.17573.91364
title: Chain C, Processed Aspartate Decarboxylase Mutant With Ser25 Mutated To Cys
DOI: 10.25921/3kk4-mx85
title: NOAA/WDS Paleoclimatology - Guliya Ice Cap, China, -0.64 to 15ka BP Ice Core d18O and d-excess Data

description: Ice cores from the northwestern Tibetan Plateau (NWTP) contain long records of regional climate variability, but refrozen meltwater and dust in these cores has hampered development of robust timescales. Here we introduce an approach to dating the ice via the isotopic composition of atmospheric O2 in air bubbles (d18Oatm), along with annual layer counting and radiocarbon dating. We provide a robust chronology for water isotope records (d18Oice and d-excess) from three ice cores from the Guliya ice cap in the NWTP. The measurement of d18Oatm, although common in polar ice core timescales, has rarely been used on ice cores from low- latitude high-altitude glaciers due to 1) low air pressure, 2) the common presence of refrozen melt that adds dissolved gases and reduces the amount of air available for analysis, and 3) the respiratory consumption of molecular oxygen (O2) by microorganisms in the ice, which fractionates the d18O of O2 from the atmospheric value. Here we make corrections for melt and respiration to address these complications. The resulting records of water isotopes from the Guliya ice cores reveal climatic variations over the last 15,000 y, the timings of which correspond to those observed in independently dated lake and speleothem records and confirm that the Guliya ice cap existed before the Holocene. The millennial-scale drivers of d18Oice are complex and temporally variable; however, Guliya d18Oice values since the mid-20th century are the highest since the beginning of the Holocene and have increased with regional air temperature.
DOI: 10.13140/rg.2.2.25543.09125
title: Chain A, Unprocessed Aspartate Decarboxylase Mutant, With Alanine Inserted At Position 24
DOI: 10.13140/rg.2.2.35609.42089
title: Chain B, Glycine 24 To Serine Mutation Of Aspartate Decarboxylase
DOI: 10.25921/39x7-e788
title: NOAA/WDS Paleoclimatology - Swetnam fire data from Sierra Ajos - IMPD USPTA002

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.

description: This dataset was contributed as part of the North American Tree-ring Fire Scar Synthesis (NAFSS) project (https://www.ncei.noaa.gov/access/paleo-search/study/34853). Data were contributed to the project from the original data generators.
DOI: 10.25921/3gyj-gt22
title: NOAA/WDS Paleoclimatology - Tarawa Atoll - Stable Isotope and Mn/Ca Data

description: In the western tropical Pacific, the interannual migration of the Indonesian Low convective system causes changes in rainfall that dominate the regional signature of the El Niño-Southern Oscillation (ENSO) system. A 96-year oxygen isotope record from a Tarawa Atoll coral (1°N, 172°E) reflects regional convective activity through rainfall-induced salinity changes. This monthly resolution record spans twice the length of the local climatological record and provides a history of ENSO variability comparable in quality with those derived from instrumental climate data. Comparison of this coral record with a historical chronology of EI Niño events indicates that climate anomalies in coastal South America are occasionally decoupled from Pacific-wide ENSO extremes. Spectral analysis suggests that the distribution of variance in this record has shifted among annual to interannual periods during the present century, concurrent with observed changes in the strength of the Southern Oscillation.
description: High-resolution (monthly) coral stable isotope and Mn/Ca from Tarawa Atoll, Republic of Kiribati. Included are 20 year (1959-1979 AD) records of d13C and d18O (Cole and Fairbanks, 1990) and Mn/Ca (Shen et al. 1992), plus a 96 year (1894 - 1990 AD) record of d18O (Cole et al. 1993). Site: Tarawa Atoll, Republic of Kiribati (1 N, 172 E) Water depth: 2-4m Coral species Hydnophora microconos (short records) and Porites lobata (long record). Data are stable isotope data presented by Cole and Fairbanks (1990) and Mn/Ca data presented by Shen et al. (1992) for 1959-1979 AD, and d18O data presented by Cole, Fairbanks, and Shen (1993) for the years 1894-1990. All stable isotopes were measured on untreated coral samples at Lamont-Doherty Earth Observatory by J. Cole and R. Fairbanks, on a Finnigan MAT-251 mass spectrometer with automated Carousel-48 carbonate device. Raw values are in standard per mil notation relative to PDB. For normalization in Cole et al. 1993, we subtracted the monthly mean from each monthly value and divided by the standard deviation of the full dataset. Measurement precisions are 0.08 per mil for d18O and 0.04 per mil for d13C. Mn/Ca measurements were performed at the University of Washington by G. Shen and L. Linn by graphite furnace atomic absorption spectrophotometry; only coral LDGO-44 was analyzed for Mn/Ca. Sample treatment procedures are described in Shen et al. (1992). Average departures from duplicate means are 1.6 nmol Mn/mol Ca. Ages for all samples in this file were derived from annual variations in d13C, assumed to correspond with annual rainy seasons as described in Cole and Fairbanks (1990). Density banding confirms these ages for LDGO-44 samples, but coral LDGO-39 did not exhibit clearly annual banding patterns. For Mn/Ca data prior to 1962 in LDGO-44, ages were determined by extrapolation based on density band data, as isotopic data only extends to 1962 in LDGO-44.
DOI: 10.25921/3epz-se87
title: NOAA/WDS Paleoclimatology - Swetnam fire data from Biledo Peak West, pipeline trail - IMPD USRFS002

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.

description: This dataset was contributed as part of the North American Tree-ring Fire Scar Synthesis (NAFSS) project (https://www.ncei.noaa.gov/access/paleo-search/study/34853). Data were contributed to the project from the original data generators.
DOI: 10.25921/3fqb-fj43
title: NOAA/WDS Paleoclimatology - Schmied - Steinbachwald - QURO - ITRDB DEU424

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: 10.25921/30ka-5g61
title: NOAA/WDS Paleoclimatology - Ferrero - Nogalar - NOG - JGAU - ITRDB ARG158

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: Tropical Tree Ring Network SiteID = JUAUS_ARG_09
DOI: 10.25921/3n3j-b390
title: NOAA/WDS Paleoclimatology - Margolis fire data from Nabor Creek, Northern New Mexico - IMPD USNAB002

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.

description: Data were contributed to the project from the original data generators.

Sample Storage Location: Bandelier National Monument, NM
Dating Method: crossdated
Related ITRDB_Chronology: Not Applicable

Fire scar data from this site are available in FHX2 format at:
  https://www.ncei.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/usnab002.fhx
along with associated metadata at:
  https://www.ncei.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/usnab002-noaa.txt

Extended supplemental information file descriptions (where applicable):
   usnab002-NAB_FS_tree_meta.csv: TreeID, species, tree condition, latitude, longitude, and sample date
   usnab002-NAB_tree_age.csv: Tree, species, condition, inner ring date, outer ring date, latitude, and longitude
DOI: 10.13140/rg.2.2.21715.78889
title: ГИБКИЕ МЕТОДОЛОГИИ УПРАВЛЕНИЯ ОБРАЗОВАТЕЛЬНЫМИ ПРОЕКТАМИ (613)
DOI: 10.15468/dl.86gb9u
title: Occurrence Download

description: A dataset containing 93799 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Piciformes)",
 "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((-100 50,-90 50,-90 60,-100 60,-100 50))"
 ]
}

 The dataset includes 93799 records from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0024914-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/3yhz-7523
title: NOAA/WDS Paleoclimatology - Vanoni - Seldenhalde - FREX - ITRDB CHE448

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: 10.25921/3jem-cq64
title: NOAA/WDS Paleoclimatology - Rohner - Vorm Stein - QUSP - ITRDB CHE458

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: Elevation range: 475 - 495 m a.s.l.