cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/gf45-3885
title: NOAA/WDS Paleoclimatology - Kelly fire data from West Crazy Lake, Yukon Flats, Alaska - IMPD USWCL007

description: Wildfire activity in boreal forests is anticipated to increase dramatically, with far-reaching ecological and socioeconomic consequences. Paleorecords are indispensible for elucidating boreal fire regime dynamics under changing climate, because fire return intervals and successional cycles in these ecosystems occur over decadal to centennial timescales. We present charcoal records from 14 lakes in the Yukon Flats of interior Alaska, one of the most flammable ecoregions of the boreal forest biome, to infer causes and consequences of fire regime change over the past 10,000 y. Strong correspondence between charcoal-inferred and observational fire records shows the fidelity of sedimentary charcoal records as archives of past fire regimes. Fire frequency and area burned increased ~6,000–3,000 y ago, probably as a result of elevated landscape flammability associated with increased Picea mariana in the regional vegetation. During the Medieval Climate Anomaly (MCA; ~1,000–500 cal B.P.), the period most similar to recent decades, warm and dry climatic conditions resulted in peak biomass burning, but severe fires favored less-flammable deciduous vegetation, such that fire frequency remained relatively stationary. These results suggest that boreal forests can sustain high severity fire regimes for centuries under warm and dry conditions, with vegetation feedbacks modulating climate–fire linkages. The apparent limit to MCA burning has been surpassed by the regional fire regime of recent decades, which is characterized by exceptionally high fire frequency and biomass burning. This extreme combination suggests a transition to a unique regime of unprecedented fire activity. However, vegetation dynamics similar to feedbacks that occurred during the MCA may stabilize the fire regime, despite additional warming.
description: Chronology and macroscopic charcoal counts (number of pieces >180 microns) from West Crazy Lake sediments Yukon Flats, Alaska; 
Entity name, WC07 (Internal lab code); 
Contact person, Kelly R.; 
Sampling date, 2007-07-09;
Sampling device, All cores were taken with a combination of 7.5 cm livingstone, 5 cm livingstone, and 7.5 cm polycarbonate tube;
Water depth(cm), 610;
Sample storage, All cores have archive halves intact, and working halves sliced at 0.25-cm resolution. These are kept at 4°C in the Hu Lab, University of Illinois, Urbana.;
Analysis method, Macroscopic charcoal counts. Please see Kelly et al. 2013 for details;
Location Description, Yukon Flats Alaska;
DOI: 10.15468/dl.eh2w2e
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Coliiformes)",
 "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 -20,-50 -20,-50 -10,-60 -10,-60 -20))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0020812-251009101135966/datasets/export for details.
DOI: 10.25921/gab6-fa09
title: NOAA/WDS Paleoclimatology - NEEM Ice Core NEEM-1 Time Scale

description: A stratigraphy-based chronology for the North Greenland Eemian Ice Drilling (NEEM) ice core has been derived by transferring the annual layer counted Greenland Ice Core Chronology 2005 (GICC05) and its model extension (GICC05modelext) from the NGRIP core to the NEEM core using 787 match points of mainly volcanic origin identified in the electrical conductivity measurement (ECM) and dielectrical profiling (DEP) records. Tephra horizons found in both the NEEM and NGRIP ice cores are used to test the matching based on ECM and DEP and provide five additional horizons used for the timescale transfer.

A thinning function reflecting the accumulated strain along the core has been determined using a Dansgaard-Johnsen flow model and an isotope-dependent accumulation rate parameterization. Flow parameters are determined from Monte Carlo analysis constrained by the observed depth-age horizons.

In order to construct a chronology for the gas phase, the ice age-gas age difference (D-age) has been reconstructed using a coupled firn densification-heat diffusion model. Temperature and accumulation inputs to the D-age model, initially derived from the water isotope proxies, have been adjusted to optimize the fit to timing constraints from d15N of nitrogen and high-resolution methane data during the abrupt onset of Greenland interstadials.

The ice and gas chronologies and the corresponding thinning function represent the first chronology for the NEEM core, named GICC05modelext-NEEM-1. Based on both the flow and firn modelling results, the accumulation history for the NEEM site has been reconstructed. Together, the timescale and accumulation reconstruction provide the necessary basis for further analysis of the records from NEEM.

description: NEEM-1 ice core time scale with match points to NGRIP1 and NGRIP2 ice cores and the GICC05 timescale.  Also included are NEEM and NGRIP DEP and ECM data, and NEEM d15N.  Original Excel file contains the ice and gas time scales and all the info needed to construct it: match points, delta age calculations, flow model results, and accumulation rate results.  A text version contains the same information, and additional text files contain the NEEM and NGRIP DEP, ECM, and d15N data series, presented in WDC Paleo text format.
DOI: 10.25921/gk64-tf91
title: NOAA/WDS Paleoclimatology - Bahamas Coral SST Reconstruction Since 1552

description: Sea surface temperature variability in the North Atlantic Ocean recorded 
since about 1850 has been ascribed to a natural multidecadal oscillation 
superimposed on a background warming trend. It has been suggested that 
the multidecadal variability may be a persistent feature, raising the 
possibility that the associated climate impacts may be predictable. 
However, our understanding of the multidecadal ocean variability before 
the instrumental record is based on interpretations of high-latitude
terrestrial proxy records. Here we present an absolutely dated and 
annually resolved record of sea surface temperature from the Bahamas, 
based on a 440-year time series of coral growth rates. The reconstruction 
indicates that temperatures were as warm as today from about 1552 to 1570, 
then cooled by about 1°C from 1650 to 1730 before warming until the present. 
Our estimates of background variability suggest that much of the warming 
since 1900 was driven by anthropogenic forcing. Interdecadal variability 
with a period of 15-25 years is superimposed on most of the record, but 
multidecadal variability becomes significant only after 1730. We conclude 
that the multidecadal variability in sea surface temperatures in the
low-latitude western Atlantic Ocean may not be persistent, potentially 
making accurate decadal climate forecasts more difficult to achieve.

description: A low-latitude western Atlantic reconstruction of SST since 1552 
derived from annual growth variations in the coral Siderastrea siderea 
sampled at Gingerbreads Reef, Bahamas. 

Unfiltered Siderastrea extension data determined by CT scan, 
added in July 2011.
DOI: 10.25921/gab8-1n26
title: NOAA/WDS Paleoclimatology - Luckman - Seltat Creek - TSME - ITRDB CANA394

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: 
# # Cores are stored at:
# # University of Western Ontario
# # 
# # Reference:
# # Payne, M.  2006.  
# # The development of sitka spruce, white spruce and mountain hemlock 
# # ring-width chronologies from a transect along the Haines Road in the 
# # Yukon Territory and B.C.  
# # Unpublished B.Sc. Thesis, Department of Geography, University of Western Ontario. NOAA Template Raw Measurements file added 2019-01-27. NOAA Template Raw Measurements file added 2019-02-04.
DOI: 10.25921/g97w-vv88
title: NOAA/WDS Paleoclimatology - Shao - Wulan WL2 - JUPR - ITRDB CHIN062

description: Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to two millennia. The most coherent feature in nearly all of the regional temperature reconstructions is a long-term cooling trend, which ended late in the nineteenth century. At multi-decadal to centennial scales, temperature variability shows distinctly different regional patterns, with more similarity within each hemisphere than between them. There were no globally synchronous multi-decadal warm or cold intervals that define a worldwide Medieval Warm Period or Little Ice Age, but all reconstructions show generally cold conditions between ad 1580 and 1880, punctuated in some regions by warm decades during the eighteenth century. The transition to these colder conditions occurred earlier in the Arctic, Europe and Asia than in North America or the Southern Hemisphere regions. Recent warming reversed the long-term cooling; during the period ad 1971-2000, the area-weighted average reconstructed temperature was higher than any other time in nearly 1,400 years.
description: Purpose of Collection: 
# Climatology - temperature analyses NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.25921/gd36-ew50
title: NOAA/WDS Paleoclimatology - Yasue - Moshiri - PCGN - ITRDB JAPA013

description: Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to two millennia. The most coherent feature in nearly all of the regional temperature reconstructions is a long-term cooling trend, which ended late in the nineteenth century. At multi-decadal to centennial scales, temperature variability shows distinctly different regional patterns, with more similarity within each hemisphere than between them. There were no globally synchronous multi-decadal warm or cold intervals that define a worldwide Medieval Warm Period or Little Ice Age, but all reconstructions show generally cold conditions between ad 1580 and 1880, punctuated in some regions by warm decades during the eighteenth century. The transition to these colder conditions occurred earlier in the Arctic, Europe and Asia than in North America or the Southern Hemisphere regions. Recent warming reversed the long-term cooling; during the period ad 1971-2000, the area-weighted average reconstructed temperature was higher than any other time in nearly 1,400 years.
description: Purpose of Collection: 
# # Climatology - temperature analyses NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.25921/gfqb-f466
title: NOAA/WDS Paleoclimatology - Shao - Delingha DLH1 - JUPR - ITRDB CHIN050

description: Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to two millennia. The most coherent feature in nearly all of the regional temperature reconstructions is a long-term cooling trend, which ended late in the nineteenth century. At multi-decadal to centennial scales, temperature variability shows distinctly different regional patterns, with more similarity within each hemisphere than between them. There were no globally synchronous multi-decadal warm or cold intervals that define a worldwide Medieval Warm Period or Little Ice Age, but all reconstructions show generally cold conditions between ad 1580 and 1880, punctuated in some regions by warm decades during the eighteenth century. The transition to these colder conditions occurred earlier in the Arctic, Europe and Asia than in North America or the Southern Hemisphere regions. Recent warming reversed the long-term cooling; during the period ad 1971-2000, the area-weighted average reconstructed temperature was higher than any other time in nearly 1,400 years.
description: Purpose of Collection: 
# Climatology - temperature analyses NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.25921/g8sh-wv48
title: NOAA/WDS Paleoclimatology - Holmes - Kaiser Pass - JUOC - CA087, PAGES North America 2K Version

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/g01f-k747
title: NOAA/WDS Paleoclimatology - Lara - Krummholz - NOPU - ITRDB CHIL024

description: Nothofagus pumilio (Poepp et Endl.) Krasser, is a deciduous tree species that grows in Chile and adjacent Argentina between 36 and 56°S, often forming the Andean tree line. This paper presents the first eight tree-ring chronologies from N. pumilio at its northern range limit in the central Andes of Chile (36-39°S) and the first precipitation reconstruction for this region. Samples were taken from upper tree-line stands (1500-1700 m elevation) in three study areas: Vilches, Laguna del Laja, and Conguillío. Results indicate that, at the northern sites (Vilches and Laguna del Laja), the tree-ring growth of N. pumilio is positively correlated with late-spring and early summer precipitation and that higher temperatures reduce radial growth, probably because of an increase in evapotranspiration and decrease in water availability. At the southern Conguillío study area, radial growth was negatively correlated with late-spring and early summer precipitation. The presence of volcanic activity in this latter study area, which might have masked the climate signal, did not seem to have a significant influence on radial growth. A reconstruction of November-December (summer) precipitation for the period 1837-1996 from N. pumilio tree-ring chronologies accounted for 37% of instrumentally recorded precipitation variance. This is the first precipitation reconstruction from N. pumilio chronologies. Only temperature and snow cover have previously been reconstructed using this species. The reconstruction indicates that the driest and wettest 25-year periods within the past 160 years are 1890-1914 and 1917-1941, respectively.
description: Purpose of Collection:
# Climatology
# 
# Cores are stored at:
# University of Western Ontario NOAA Template Raw Measurements file added 2019-04-29.
DOI: 10.25921/gq88-nk44
title: NOAA/WDS Paleoclimatology - Cherubini - Vordemwald - QUPE - ITRDB SWIT359

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: Cores are stored at: 
# WSL
# 
# Notes: 
# NNW exposure
# Formerly vor_628_QUPE_R.tuc NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/gavg-y850
title: NOAA/WDS Paleoclimatology - Büntgen - Tale - PCAB - ITRDB SVK005

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 2019-02-05.
DOI: 10.25921/g1g8-w451
title: NOAA/WDS Paleoclimatology - Neuwirth - Hessen/Kellerwald dhk05 - FASY - ITRDB GERM152

description: Growth responses to twentieth century climate variability of the three main European tree species Fagus sylvatica, Quercus petraea, and Pinus sylvestris within two temperate low mountain forest sites were analyzed, with particular emphasis on their dependence upon ecological factors and temporal stability in the obtained relationships. While site conditions in Central (~51°N, 9°E, KEL) and West (50.5°N, 6.5°E, EIF) Germany are similar, annual precipitation totals of ~700 mm and ~1,000 mm describe a maritime-continental gradient. Ring-width samples from 228 trees were collected and PCA used to identify common growth patterns. Chronologies were developed and redundancy analysis and simple correlation coefficients calculated to detect twentieth century temperature, precipitation, and drought fingerprints in the tree-ring data. Summer drought is the dominant driver of forest productivity, but regional and species-specific differences indicate more complex influences upon tree growth. F. sylvatica reveals the highest climate sensitivity, whereas Q. petraea is most drought tolerant. Drier growth conditions in KEL result in climate sensitivity of all species, and Q. petraea shifted from non-significant to significant drought sensitivity during recent decades at EIF. Drought sensitivity dynamics of all species vary over time. An increase of drought sensitivity in tree growth was found in the wetter forest area EIF, whereas a decrease occurred in the middle of the last century for all species in the drier KEL region. Species-specific and regional differences in long-term climate sensitivities, as evidenced by temporal variability in drought sensitivity, are potential indicators for a changing climate that effects Central-West German forest growth, but meanwhile hampers a general assessment of these effects.
description: Purpose of Collection:
# climate/growth relationship NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/g9a5-fd29
title: NOAA/WDS Paleoclimatology - Neuwirth - Nordrhein-Westfalen/Eifel dre10 - FASY - ITRDB GERM182

description: Spatiotemporal variations in tree growth are induced by varying environmental conditions. Different methods like variants of the principal component analysis and the hierarchical cluster analysis are commonly applied in dendroecology to separate subsets of growth patterns within large tree-ring datasets. To seek for methodological differences in classification techniques and their specific characteristics, we compared three standard methods using a homogeneous oak (Quercus spp.) network from temperate forests in Central-West Germany. Classifications of the original dataset consisting of 46 oak ring-width sites, carried out with the varimax rotated principle component analysis, Ward's method and the average linkage method, reveal differences in the classification of approximately 20% of the sites. Analyses with modified datasets are calculated to evaluate effects of dataset extension, different time periods and different tree-ring detrendings. The application of the principal component analysis generally leads to the most stable site classifications, whereas the most sensitive response to changes in the dataset is obtained by Ward's method. The average linkage method separates single sites in the classification and thus emphasises outliers within the tree-ring network.
description: Purpose of Collection:
# climate/growth relationship NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.15468/dl.4q7fvz
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Gastropoda)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1980",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 },
 "Geometry POLYGON((140 0,150 0,150 10,140 10,140 0))"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0020813-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/g1dd-dv62
title: NOAA/WDS Paleoclimatology - Kaiser - Two Creeks - PCMA - ITRDB WI013

description: Dendrochronological analysis of fossil wood from Two Creeks, Wisconsin, reveals that the Two Creekan Intetstade lasted at least 252 yr. The sites crossdated by tree rings cover an area of about 970 km2. AMS determinations from the beginning and end of the chronology open a 14 C time window for the episode from 12,050 to 11,750 yr B.P. The interval is contemporaneous with the Older Dryas in northern Europe. The development of a forest covering at least 970 km2 on the western shore of Lake Michigan indicates a water level about as low as in modern times. Glacier retreat must have opened drainage channels either through the Straits of Mackinac or via the Indian River Plateau into the eastern lakes. The beginning of the tree-ring chronology coincides with the peak of meltwater pulse 1A at 12,000 yr B.P. Increased amounts of meltwater seem to have disturbed the heat exchange between the waters and the atmosphere in the North Atlantic off the Gulf of St. Lawrence or affected the d18O-ratio of the evaporation, causing the climatic or isotopic reversal of the Older Dryas in Greenland and northern Europe.
description: Collection purpose: 
# Determination of Two Creeks Insterstadial, meltwater event
# 
# Cores are stored at: 
# WSL
# 
# Notes: 
# Older Dryas/early Alleroed, cal. 12000-11750 BP
# Formerly Two Creeks (TC)
# 
# References:
# Kaiser K.F.(1994) 
# Two Creeks Interstadial dated through dendrochronology and AMS, 
# QR 42, 288-298.; 
# Kaiser, K.F. (1993): Beitrage zur Klimageschichte 
# vom spaten Hochglazial bis ins fruhe Holozan ... 
# Ziegler Druck- und Verlags-AG, Winterthur. 203p. NOAA Template Raw Measurements file added 2019-02-08.