cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/ksa2-2x87
title: NOAA/WDS Paleoclimatology - Conedera - La Gahna Copera - LADE - ITRDB SWIT225

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/k0jc-gg81
title: NOAA/WDS Paleoclimatology - Friedman - Garrison Dam Floodplain - PPDE - ITRDB ND015

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 2020-01-15.
DOI: 10.25921/kcnh-gt60
title: NOAA/WDS Paleoclimatology - Seim - Cuka Partisan - PIHE - ITRDB ALB003

description: Considerable progress has been made in assessing European climate variations of the last millennium, but little is known about the Mediterranean region and particularly its eastern part including the Balkan Peninsula. This area, however, will be particularly vulnerable to a predicted temperature increase and precipitation decrease, likely resulting in amplified drought extremes and episodes. Here we present a well-replicated composite tree-ring width chronology of millennial length from Albania, Balkan Peninsula. The Pinus heldreichii Christ dataset contains 302 series from 217 living and dead trees from 3 high-elevation sites, and spans the years 968-2008. Signal strength and growth-climate relationships were investigated using subsets according to location, age class, and growth level, as well as differently detrended chronology versions. Growth comparisons amongst the 3 sites' chronologies, between age classes and between growth-rate groups reveal an overall strong common signal. Growth-climate relationships over the last 100 yr, however, indicate that tree-ring formation does not depend on one single dominant factor, but rather on various combinations of summer precipitation and temperature resulting in temporally varying drought sensitivity. Our results emphasize a mixed and variable climate signal, corresponding with findings from other P. heldreichii sites across the Balkan Peninsula and Southern Italy.
description: NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/k5cc-mj53
title: NOAA/WDS Paleoclimatology - Büntgen - Goderzis-pass - ABAL - ITRDB GEOR007

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 2019-04-08.
DOI: 10.25921/kdbr-wp41
title: NOAA/WDS Paleoclimatology - Hogholt - Morimondo - QURO - ITRDB ITAL052

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: Climate response of two oak species in northern Italy in the last 60 years NOAA Template Raw Measurements file added 2019-08-22.
DOI: 10.25921/ktgk-5445
title: NOAA/WDS Paleoclimatology - Boswijk - Arney Road 139 - AGAU - ITRDB NEWZ093

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 2019-02-01.
DOI: 10.25921/kc41-xy86
title: NOAA/WDS Paleoclimatology - Phanerozoic record of global sea-level change for last 100 Ma

description: We review Phanerozoic sea-level changes (543 Ma to present) on various time scales and present a new sea-level record for the last 100 my. Long-term sea level peaked at 100±50 m during the Cretaceous, implying that ocean crust production rates were much lower than previously inferred. Sea level mirrors d18O variations, reflecting ice-volume change on the 10^4-10^6-year scales, but a link between d18O and sea level on the 10^7-year scale must be due to temperature changes that we attribute to tectonically controlled CO2 variations. Sea-level change has influenced phytoplankton evolution, ocean chemistry, and the loci of carbonate, organic carbon, and siliciclastic sediment burial. Over the past 100 my, sea-level changes reflect global climate evolution from a time of ephemeral Antarctic ice sheets (100-33 Ma), through a time of large ice sheets primarily in Antarctica (33-2.5 Ma), to a world with large Antarctic and large, variable Northern Hemisphere ice sheets (2.5-0 Ma).
description: Sea level curves derived from ODP drilling and backstripping.
DOI: 10.25921/k15y-yx09
title: NOAA/WDS Paleoclimatology - Lloyd - Alces Bluff - PCGL - ITRDB AK122

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: Third letter (B, F, or U) of the site code represents 
# the topographic position on these steep river bluffs: 
# B=trees towards the base of the bluff, F=trees out on 
# the face of the bluff, and U=trees on the upper bluff.  NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/kc7d-g806
title: NOAA/WDS Paleoclimatology - Copenheaver - Raystown Lake - QUAL - ITRDB PA015

description: The objective of this study was to track changes in growth and dendroclimatic response of white oak (Quercus alba) trees that established in the forest interior and, following the creation of an artificial lake, continued living along the lake edge. Twenty-one white oaks from the lake edge were cored and 91% of the trees exhibited a growth response to the creation of the lake - most commonly a suppression. Two 32 y segments (pre-lake and post-lake) were compared for differences in dendroclimatic response. The tree-ring chronology from the pre-lake time period had significant negative correlations between ring width index (RWI) and temperature in Jun.; significant positive correlations between RWI and precipitation from Jun. of the previous year; significant positive correlations between RWI and precipitation in Mar. of the current year; and significant positive correlations between RWI and Palmer Drought Severity Index (PDSI) in Jul. After lake construction, the same trees exhibited significant positive correlations between RWI and Jul. temperature from the previous year; significant negative correlations between RWI and temperature in Feb. and May; significant positive correlations between RWI and precipitation in Sep.; and significant positive correlations between RWI and PDSI in Jun., Jul., Aug. and Sep. Most trees that experienced transitions from interior to edge positions responded with a decline in growth rate and a moderate change in dendroclimatic responsiveness.
description: NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/krn2-jd84
title: NOAA/WDS Paleoclimatology - Sacred Lake, Mt. Kenya 47000 Year GDGT Temperature Reconstruction

description: Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are a novel proxy for mean annual air temperature (MAAT) and have the potential to be broadly applicable to climate reconstruction using lacustrine sediments. Several calibrations have been put forth relating brGDGT distributions to MAAT using a variety of linear regressions, including the methylation (MBT) and cyclization (CBT) indices of brGDGTs, the relative abundances of the major, non-cyclized brGDGTs (MbrGDGTs), and best subsets regression (BSR) of the fractional abundances of the nine most common brGDGTs. However, these calibrations have rarely been applied to lake sediment cores to reconstruct temperatures and test the applicability of this proxy as a paleothermometer.  
We present an expanded East African lakes surface sediment brGDGT dataset based upon 111 lakes and examine three methods of calibrating brGDGTs to MAAT. These methods include recalculations of the East African lake MBT/CBT calibration and MbrGDGTs calibrations, as well as a new stepwise forward selection (SFS) calibration that uses the four combined brGDGTs that explain the most variance in temperature in our calibration set. We apply these new calibrations as well as five previously published lacustrine brGDGT calibrations to the brGDGT distributions of our surface sediment dataset and a 48 kyr sediment core from Sacred Lake, Mt. Kenya, producing the first brGDGT temperature reconstruction available from a small tropical lake. We compare the reconstructed temperatures to previously published paleotemperature records from East Africa to help us assess the performance of the brGDGT calibrations. We find that the SFS calibration has a consistently low root mean squared error of prediction (RMSEP) over the entire range of MAAT, while the MBT/CBT and MbrGDGT calibrations have relatively large RMSEPs, particularly between lakes with similar temperatures but variable pH. This suggests that these techniques do not properly deconvolve the temperature and pH signals recorded in the distributions of the brGDGTs. We further find that only the SFS calibration produces a credible reconstructed temperature history from Sacred Lake when compared to other last glacial maximum paleotemperature estimates from East Africa. Thus, we advocate for the use of the SFS calibration when reconstructing paleotemperatures from brGDGTs in East Africa.
description: This dataset contains depth, age, reconstructed temperatures, and bootstrap errors on the temperature reconstruction from a core from Sacred Lake, Mt. Kenya.  Temperatures were reconstructed from branched GDGTs using the Loomis et al. (2012) stepwise forward selection (SFS) calibration.
DOI: 10.25921/kzjx-nq51
title: NOAA/WDS Paleoclimatology - Krusic - Shitizi East Valley - PCSH - ITRDB CHIN013

description: The Asian monsoon system affects more than half of humanity worldwide, yet the dynamical processes that govern its complex spatiotemporal variability are not sufficiently understood to model and predict its behavior, due in part to inadequate long-term climate observations. Here we present the Monsoon Asia Drought Atlas (MADA), a seasonally resolved gridded spatial reconstruction of Asian monsoon drought and pluvials over the past millennium, derived from a network of tree-ring chronologies. MADA provides the spatiotemporal details of known historic monsoon failures and reveals the occurrence, severity, and fingerprint of previously unknown monsoon megadroughts and their close linkages to large-scale patterns of tropical Indo-Pacific sea surface temperatures. MADA thus provides a long-term context for recent monsoon variability that is critically needed for climate modeling, prediction, and attribution.
description: Purpose of Collection:  
# Climatology - precipitation analysis  
#  NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.25921/ktdm-5d82
title: NOAA/WDS Paleoclimatology - Woodhouse - Pumphouse update - PIED - ITRDB CO648

description: In western North America, snowpack has declined in recent decades, and further losses are projected through the 21st century. Here, we evaluate the uniqueness of recent declines using snowpack reconstructions from 66 tree-ring chronologies in key runoff-generating areas of the Colorado, Columbia, and Missouri River drainages. Over the past millennium, late 20th century snowpack reductions are almost unprecedented in magnitude across the northern Rocky Mountains and in their north-south synchrony across the cordillera. Both the snowpack declines and their synchrony result from unparalleled springtime warming that is due to positive reinforcement of the anthropogenic warming by decadal variability. The increasing role of warming on large-scale snowpack variability and trends foreshadows fundamental impacts on streamflow and water supplies across the western United States.
description: Purpose of Collection: 
# Climatology - Snowpack reconstruction
#  NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/k3c6-gq72
title: NOAA/WDS Paleoclimatology - Esper - Boibar Valley 2 - JUSP - ITRDB PAKI010

description: We present an analysis of 28 juniper tree-ring sites sampled over the last decades by several research teams in the Tien Shan and Karakorum mountains of western central Asia. Ring-width chronologies were developed on a site-by-site basis, using a detrending technique designed to retain low-frequency climate variations. Site chronologies were grouped according to their distance from the upper timberline in the Tien Shan (~3,400 m a.s.l.) and Karakorum (~4,000 m), and low- and high-elevation composite chronologies combining data from both mountain systems developed. Comparison of these elevational subsets revealed significant coherence (r = 0.72) over the 1438–1995 common period, which is inconsistent with the concept of differing environmental signals captured in tree-ring data along elevational gradients. It is hypothesized that the uniform growth behavior in central Asian juniper trees has been forced by solar radiation variations controlled via cloud cover changes, but verification of this assumption requires further fieldwork. The high-elevation composite chronology was further compared with existing temperature reconstructions from the Karakorum and Tien Shan, and long-term trend differences discussed. We concluded that the extent of warmth during medieval times cannot be precisely estimated based on ring-width data currently available.
description: Purpose of Collection: 
# Dendroclimatology
# 
# Cores and cross-sections are stored at: 
# WSL
#  NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.25921/k3eb-y423
title: NOAA/WDS Paleoclimatology - Chinese Loess Plateau 700KYr Amino Acid Racemization Data

description: Amino acid geochronology provides important chronostratigraphic insight in the regional correlation and paleoclimatic evaluation of loess-paleosol sequences in the midwestern US, throughout western, central, and eastern Europe, and in China. In general, loess of the last four glacial cycles, corresponding to marine oxygen-isotope stages (OIS) 2-4, 6, 8, and 10, respectively, can be distinguished on the basis of alloisoleucine/isoleucine (A/I) ratios measured in fossil gastropod shells preserved in the loess. The racemization reaction is much slower in older samples, resulting in decreased temporal resolution. In the midwestern US and Europe, it is not possible to confidently subdivide the last glacial cycle on the basis of aminostratigraphic data. However, in China, where effective temperatures were higher during the Late Pleistocene, loess above and below L1SS1, the OIS-3 interstadial paleosol, can be distinguished using amino acid racemization data. With improvements in analytical methods, multiple amino acid D/L enantiomers are now being measured using reverse-phase liquid chromatography. Aspartic acid racemizes at a higher rate than the traditionally measured alloisoleucine/isoleucine diastereomers and can be measured more rapidly. This development offers hope for better temporal resolution and enhanced stratigraphic subdivision of loess units than has been achieved previously.
description: Alloisoleucine/isoleucine data from fossil snail shells recovered 
from loess strata of the Chinese loess plateau in the region near 
Luochuan, Shaanxi Province, China. 

Fossil gastropod shells collected from large exposures of stratified 
loess and paleosols in the vicinity of Luochuan, Shaanxi Province, 
China, are analyzed by cation-exchange HPLC to determine the extent 
of isoleucine epimerization.  Three of the sample sites (Lower Heimu, 
Upper Heimu and Potou) are within about three kilometers of the 
village of Luochuan and are near branches of a large, deep gully 
system (Heimugou).  The fourth site is at an excavation for a railroad 
grade about 20 km southwest of Luochuan and close to the city of 
Huangling.  The ratio of D-alloisoleucine/L-isoleucine (AI) 
progressively increases in shells from strata of increasing 
stratigraphic age over several loess (glacial) cycles from L1 
(youngest) to L5 (oldest sampled for this report).  The AI values 
provide clear discrimination of loess stratigraphic units L1, L2 and 
L3.  Although AI values continue to increase in units older than L3, 
resolution decreases.  Confounding the inevitable reduction of 
resolution with increasing age is the fact that shells are much less 
abundant in the older strata and, therefore, few shell samples were 
recovered.  Due to this scarcity of data, the extent of isoleucine 
epimerization in shells from these older units remains poorly 
characterized.  On the other hand, the resolution in the youngest 
loess, L1, is good enough that it appears possible to discriminate 
between the two loess strata within it, L1LL1 and L1LL2.
DOI: 10.25921/kg7f-7p44
title: NOAA/WDS Paleoclimatology - Sauchyn - Two O'Clock Creek - PSME - ITRDB CANA350

description: In this paper the mean water year (October through September) flow of the North Saskatchewan River (NSR) at Edmonton, Alberta is reconstructed back to 1063 A.D. using a new network of moisture-sensitive tree-ring chronologies from limber pine and Douglas fir at seven sites in the headwater sub-basins of the North Saskatchewan River Basin (NSRB). Over the full extent of the proxy hydrometric record (1063-2007), we examined 1) the duration and severity of low flow, 2) the dominant frequencies of periodic variability and 3) the correlation between these significant periodicities in proxy streamflow and climate indices, specifically sea surface temperature oscillations, which are known drivers of regional hydroclimatic variability. This new record of the paleohydrology of the NSRB is compared to previous tree-ring reconstructions of the annul flow of the North and South Saskatchewan Rivers. Extending the reference hydrology for the basin from decades to centuries changes perceptions of the reliability of the water supply and understanding of the hydroclimatic variability. The gauge record not does represent the full extent of interannual to multidecadal variability in the tree-ring data; there are periods of low flow in the pre-instrumental record that are longer and more severe than those recorded by the gauge.
description: NOAA Template Raw Measurements file added 2019-01-27. NOAA Template Raw Measurements file added 2019-02-04.
DOI: 10.25921/kzre-dg05
title: NOAA/WDS Paleoclimatology - Knight - Lavender Mountain - PIPA - ITRDB GA016

description: The depth of the 2006-9 drought in the humid, southeastern US left several metropolitan areas with only a 60-120 day water supply. To put the region's recent drought variability in a long-term perspective, a dense and diverse tree-ring network-including the first records throughout the Apalachicola-Chattahoochee-Flint river basin - is used to reconstruct drought from 1665 to 2010 CE. The network accounts for up to 58.1% of the annual variance in warm-season drought during the 20th century and captures wet eras during the middle to late 20th century. The reconstruction shows that the recent droughts are not unprecedented over the last 346 years. Indeed, droughts of extended duration occurred more frequently between 1696 and 1820. Our results indicate that the era in which local and state water supply decisions were developed and the period of instrumental data upon which it is based are amongst the wettest since at least 1665. Given continued growth and subsequent industrial, agricultural and metropolitan demand throughout the southeast, insights from paleohydroclimate records suggest that the threat of water-related conflict in the region has potential to grow more intense in the decades to come.
description:  NOAA Template Chronology file added 2018-12-20. NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.15468/dl.5436ub
title: Occurrence Download

description: A dataset containing 1124 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "Geometry POLYGON((-121 -40,-31 -40,-31 36,-121 36,-121 -40))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Laelia"
 ]
}

 The dataset includes 1124 records from 124 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0021093-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/kk7m-dw41
title: NOAA/WDS Paleoclimatology - Krusic - Qiaxi - PCSH - ITRDB CHIN012

description: The Asian monsoon system affects more than half of humanity worldwide, yet the dynamical processes that govern its complex spatiotemporal variability are not sufficiently understood to model and predict its behavior, due in part to inadequate long-term climate observations. Here we present the Monsoon Asia Drought Atlas (MADA), a seasonally resolved gridded spatial reconstruction of Asian monsoon drought and pluvials over the past millennium, derived from a network of tree-ring chronologies. MADA provides the spatiotemporal details of known historic monsoon failures and reveals the occurrence, severity, and fingerprint of previously unknown monsoon megadroughts and their close linkages to large-scale patterns of tropical Indo-Pacific sea surface temperatures. MADA thus provides a long-term context for recent monsoon variability that is critically needed for climate modeling, prediction, and attribution.
description: Purpose of Collection:  
# Climatology - precipitation analysis NOAA Template Raw Measurements file added 2019-04-08.