cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/kvs5-8j26
title: NOAA/WDS Paleoclimatology - Hughes - Kivach Nature Reserve - PISY - ITRDB RUSS272

description: We report new data on tree-ring growth in northern European Russia, a region with a hitherto relatively sparse tree-ring network. We explore its associations with climate variability. Areas, sampling locations and trees were selected for representativeness rather than climate sensitivity. Using tree rings from 651 conifers from six widely dispersed areas we show strong intercorrelation between trees within each major conifer species within and between areas. Regional composite tree-ring series for spruce and pine contain a major fraction of decadal and multidecadal variability. The most likely driver of this common variability is interannual to multidecadal climate variability. Gridded monthly instrumental climate data for the period 1902-2008, particularly mean temperature and total precipitation, were tested as predictors of each local species-specific tree-ring site chronology. The most consistent pattern emerged for spruce at all but the southernmost area. Cool and moist summers the year before growth were consistent drivers of spruce ring growth throughout the period, with no change in recent decades. Self-calibrating Palmer Drought Severity Index for prior summer was also a strong and consistent driver of spruce ring growth. For pine, there was a weaker but similarly stable association between larger rings and warm, moist conditions, in this case in the current summer. These associations were also identified at multidecadal time scales, particularly for spruce. On the other hand, the specific role of moisture variability in determining interannual to multidecadal variability in tree growth in this high latitude region raises questions about the relative vulnerability of spruce and pine there under global warming.
description: NOAA Template Raw Measurements file added 2020-01-15.
DOI: 10.25921/kzff-2j19
title: NOAA/WDS Paleoclimatology - Zoolithencave, Germany 150 Year Speleothem Isotope and Element Data

description: Two small annually laminated stalagmites from Zoolithencave (southeastern Germany) grew between CE 1821 and 1970 (Zoo-rez-1) and CE 1835 and 1970 (Zoo-rez-2), respectively. Trace element concentrations were determined by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). Samples for d13C and d18O analyses were micromilled on annual and subannual resolution. Soil and host rock samples were analyzed by X-Ray Diffraction (XRD) and their elemental concentrations determined via inductively coupled plasma optical emission spectrometer (ICP-OES). Trace element concentrations in the stalagmites show two groups in the principal component analyses: one with Mg, Ba, and Sr and another with Y, P, and Al, respectively. The second group reflects the content of detrital material. Increased weathering of soil minerals seems to have a strong influence on the silicate/carbonate weathering ratio controlling the variability of Mg, Ba, and Sr. Meteorological and Global Network of Isotopes in Precipitation (GNIP) station data were used to calculate the d18O values of the drip water (infiltration-weighted, mean annual, and the mean of the winter precipitation d18O values) as well as the corresponding speleothem calcite. The d18O values calculated by the infiltration-weighted model show similar patterns and amplitudes as the measured d18O values of the two stalagmites. This suggests that the d18O values of speleothem calcite reflect the d18O values of infiltration-weighted annual precipitation, which is related to mean annual temperature, resulting in a significant correlation between mean annual temperature and the measured d18O values of stalagmite Zoo-rez-2. This relationship could potentially be used for quantitative climate reconstruction in the future by extending the time series back in time with further stalagmites from Zoolithencave.
description: High-resolution speleothem stable isotope (d13C, d18O) and elements (Mg, Al, P, Sr, Y, Ba) data from two stalagmites collected in Zoolithencave, Germany for the past 150 years. Silicate versus carbonate weathering has an influence on speleothem trace elements; Yttrium, phosphorus, and aluminium reflect detrital content of the speleothems; d18O values of the stalagmites are a proxy for mean annual temperature. Speleothem Zoo-rez-1: -21-129 calBP.  Speleothem Zoo-rez-2: -21-114 cal BP.  Provided keywords: oxygen isotopes; carbon isotopes; trace elements; temperature proxy; karst processes.
DOI: 10.25921/kv73-e602
title: NOAA/WDS Paleoclimatology - Missouri Basin Spring Precipitation Reconstructions

description: The impacts of warming temperatures and declining snowpack on seasonal water yields in the Missouri River Headwaters are not well understood, revealing a gap in our understanding of regional hydroclimate and drivers of streamflow within the Upper Missouri River basin. This study presents the first annually resolved tree-ring reconstruction of spring precipitation for the Missouri River Headwaters. This reconstruction along with existing tree-ring reconstructions of 1 April snow water equivalence (SWE) and water year streamflow are used to detect variable influences of winter and spring precipitation on streamflow over past centuries, and relative to the modern period. The results suggest that spring precipitation has been a more consistent influence on water year streamflow in the Missouri River Headwaters over past centuries than winter snowpack. The strong relationship between 1 April SWE values and water year streamflow in the Missouri River Headwaters observed over much of the 20th century is not found to be a consistent feature of these multicentury paleorecords. Instead, the climatic influences on streamflow within the Missouri River Headwaters are likely more variable than 20th-century instrumental records indicate.
description: Spring Precipitation (May - June) for the Missouri River Headwaters region (~42-50N, ~103-114W) reconstructed from tree-ring data, for the past 600 years. Previously published Upper Missouri River Basin reconstructions of Snow Water Equivalent, Streamflow, and Temperature used in the analysis are included.
DOI: 10.25921/k9vr-5r75
title: NOAA/WDS Paleoclimatology - Therrell - Round Bluff - QUSP - ITRDB IL021

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: Round Bluff, October 27th, 2014,Q. stellata and Q. alba NOAA Template Raw Measurements file added 2020-03-09.
DOI: 10.25921/kxxn-4d50
title: NOAA/WDS Paleoclimatology - Lake Austre Nevlingen, Svalbard 12,000 Year Biomarker and Geochemical Data

description: Arctic precipitation is predicted to increase in the coming century, due to a combination of enhanced northward atmospheric moisture transport and local surface evaporation from ice-free seas. However, large model uncertainties, limited long-term observations, and high spatiotemporal variability limit our understanding of these mechanisms, emphasizing the need for paleoclimate records of precipitation changes. Here we use lipid biomarkers in lake sediments to reconstruct precipitation seasonality in northern Spitsbergen, Svalbard. We measured the hydrogen isotopic ratios (d2H) of n-alkanoic acids (C20-C30) from sedimentary leaf waxes in lake Austre Nevlingen, Spitsbergen. We interpret d2H values of mid-chain (C22) and long-chain (C28) n-alkanoic acids to represent d2H of lake and soil water, respectively. Austre Nevlingen lake water d2H reflects amount-weighted mean annual precipitation d2H. In contrast, soil water is mostly recharged by summer rainfall, and therefore reflects d2H values of summer precipitation. Austre Nevlingen leaf wax d2H values are 2H-depleted in the Early Holocene, suggesting high winter precipitation amounts. This coincides with high summer insolation, strong Atlantic water advection and reduced spring sea-ice cover in surrounding waters. Winter precipitation continued to dominate until c. 6 cal. kyr BP. After 6 cal. kyr BP, the trend in the biomarker record is not as clear. This could be related to colder conditions causing longer duration of seasonal lake-ice cover, thereby influencing the precipitation seasonality registered by the lake water. The Austre Nevlingen record suggests a close relationship between precipitation seasonality and regional ocean surface conditions, consistent with simulations suggesting that Arctic winter sea-ice loss will lead to increased local evaporation.
description: n-alkanoic acid hydrogen isotope (d2H) and concentration data, plus x-ray fluorescence elemental data and loss-on-ignition, from sediment cores ANS1 and ANP3, collected from lake Austre Nevlingen, northern Spitsbergen, Svalbard. Two-core composite fatty acid d2H data also presented
DOI: 10.25921/k91b-0t87
title: NOAA/WDS Paleoclimatology - Polar Ice Core 42-77ka Excess Methane Data

description: Ice core records of atmospheric methane (CH4) and its isotopic composition provide important information about biogeochemical cycles in the past. Interpreting these data requires that they faithfully record the composition of the atmosphere. In this study, we describe anomalies of up to 30-40 ppb CH4 that are only observed in dust-rich (>~60 ng Ca/g ice), glacial-period ice measured with standard melt-refreeze methods. The stable isotopic composition of CH4 is also significantly affected. Results from the GISP2 and NEEM ice cores from Greenland show that excess CH4 is either released or produced in the presence of liquid water in amounts which are highly correlated with the abundance of Ca2+ and mineral dust in the sample. Additional experiments show that excess CH4 is unaffected by the addition of HgCl2 (a microbial inhibitor) and is not related to ice core storage time. Dust concentrations in Antarctic ice cores are an order of magnitude lower than in Greenlandic ice cores and no excess CH4 was observed in samples from the Antarctic WAIS Divide (WD) and South Pole (SPICE) ice cores. While the overall structure of the ice core atmospheric methane history is minimally impacted by excess CH4, the impacts on the isotopic record and on inverse models used to reconstruct CH4 sources are greater. We propose three potential mechanisms to explain the presence of excess CH4: (1) that CH4 is adsorbed on dust particles prior to deposition on the ice sheet and is slowly desorbed during the melt-extraction step of sample analysis; (2) that dust acts as a micro-environment within the ice sheet for methanogenic extremophiles; or (3) that excess CH4 is a product of abiotic degradation of organic compounds during the melt-extraction step of sample analysis.
description: Excess CH4 data from the NEEM, GISP2, WAIS Divide, RICE, and SPICE polar ice cores for 42.7-77 ka, plus updated and previously unpublished CH4 measurements of samples from the GISP2 ice core (file lee2020ch4-gisp2.txt)
DOI: 10.25921/kb0m-4w89
title: NOAA/WDS Paleoclimatology - Barclay - Copper River Delta Hemlock A - TSME - ITRDB AK169

description: Fluctuations of four valley glaciers in coastal south-central Alaska are reconstructed for the past two millennia. Tree-ring crossdates on 216 glacially killed stumps and logs provide the primary age control, and are integrated with glacial stratigraphy, ages of living trees on extant landforms, and historic forefield photographs to constrain former ice margin positions. Sheridan Glacier shows four distinct phases of advance: in the 530s to c.640s in the First Millennium A.D., and the 1240s to 1280s, 1510s to 1700s, and c.1810s to 1860s during the Little Ice Age (LIA). The latter two LIA advances are also recorded on the forefields of nearby Scott, Sherman and Saddlebag glaciers. Comparison of the Sheridan record with other two-millennia long tree-ring constrained valley glacier histories from south-central Alaska and Switzerland shows the same four intervals of advance. These expansions were coeval with decreases in insolation, supporting solar irradiance as the primary pacemaker for centennial-scale fluctuations of mid-latitude valley glaciers prior to the 20th century. Volcanic aerosols, coupled atmospheric-oceanic systems, and local glacier-specific effects may be important to glacier fluctuations as supplemental forcing factors, for causing decadal-scale differences between regions, and as a climatic filter affecting the magnitude of advances.
description:  NOAA Template Chronology file added 2020-05-12.
DOI: 10.15468/dl.bpmpzt
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
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 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0021100-251009101135966/datasets/export for details.
DOI: 10.25921/k5j0-p437
title: NOAA/WDS Paleoclimatology - Chitral HinduKush, Pakistan 424 Year Palmer Drought Severity Index Reconstruction

description: Currently, the rate of global warming has led to persistent drought patterns. It is considered to be the preliminary reason affecting socio-economic development under the background of dynamic forecasting of water supply and forest ecosystems in West Asia. However, long-term climate records in the semi-arid Chitral mountains of northern Pakistan are seriously lacking. Therefore, we developed a new tree-ring width chronology of Cedrus deodara spanning the period of 1537-2017. We reconstructed the March-August Palmer Drought Sensitivity Index (PDSI) for the past 424 years back to A.D. 1593. Our reconstruction was featured with nine dry and eight wet periods 1593-1598, 1602-1608, 1631-1645, 1647-1660, 1756-1765, 1785-1800, 1870-1878, 1917-1923, 1981-1995, and 1663-1675, 1687-1708, 1771-1773, 1806-1814, 1844-1852, 1932-1935, 1965-1969 and 1996-2003, respectively. This reconstruction is consistent with other dendroclimatic reconstructions in west Asia, confirming its reliability. The analysis of the Multi-Taper Method and wavelet analysis revealed drought variability at periodicities of 2.1-2.4, 3.3, 6, 16.8, and 34-38 years. The drought patterns could be linked to the broad-scale atmospheric-oceanic variability such as El Niño-Southern Oscillation (ENSO), Atlantic Multi-decadal Oscillation (AMO) and solar activity. In terms of current climate conditions, our findings have important implications for developing drought-resistant policies in communities on the fringes of Hindu Kush mountain Ranges in northern Pakistan.
description: A 424-year tree-ring-based Palmer Drought Severity Index reconstruction based on Cedrus deodara D. Don from the Hindu Kush range of Pakistan. The tree ring width measurements are archived in the International Tree-Ring Data Bank, Site Code PAKI041: https://www.ncdc.noaa.gov/paleo/study/29553
DOI: 10.25921/k3w1-kr97
title: NOAA/WDS Paleoclimatology - Lagunillas Peatland, Chile 1,800 Year Geochemical and Isotope Data

description: A Late Holocene paleoenvironmental record was obtained from the Lagunillas cushion peatland (LP, 27 12'S, 69 17'W), located in the dry Puna of the western Central Andes. Ten radiocarbon dates build the chronology for the last 1800 cal a BP. Analyses of stable isotopes on cellulose (d18Ocell, d13Ccell) and geochemical proxies on organic matter (d13COM, d15Nbulk, TOC, TN, LOI, T535) were conducted to identify major paleoenvironmental changes in this record. Simultaneously, ambient water (d18O, d2H) and plant samples of the dominant species Oxychloe andina (d18Ocell, d13Ccell) reveal insights into modern conditions. The record reveals distinct multi-centennial oscillations of peat layer thickness and d18Ocell. Decomposition, changes in the dominating plant species as well as in plant parts (leaves/roots) can be excluded as driving factors for these oscillations. Thus, d18Ocell seems to be externally forced and reflects humidity changes. Around 470 cal a BP a distinct change towards increased humidity occurred, lasting during the Little Ice Age until about 70 cal a BP. Humid conditions prevailed between 1530 and 1270 cal a BP. Increasing d18Ocell values since 30 cal a BP mark a trend towards again increased aridity.
description: Multiproxy record from Lagunillas Peatland, Chile as base for 1,800 year paleoenvironmental reconstruction
DOI: 10.25921/kp2m-px14
title: NOAA/WDS Paleoclimatology - Sauchyn - Beauvais Lake - PSME - ITRDB CANA568

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: Upper Missouri River Basin Streamflow project NOAA Template Raw Measurements file added 2020-01-15.
DOI: 10.25921/ksnj-kc97
title: NOAA/WDS Paleoclimatology - Sauchyn - Beaver Creek Road - PIPO - ITRDB MT139

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: Upper Missouri River Basin Streamflow project NOAA Template Raw Measurements file added 2020-01-15.
DOI: 10.25921/kcs1-dc94
title: NOAA/WDS Paleoclimatology - Arnold - Croome Court - QUSP - ITRDB BRIT079

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: Tree-ring analysis of timbers from the roof of the 'Red Wing', Croome Court, Croome D'Abitot, near Upton upon Severn. The ring width series of 13 samples represented by site sequence CRMASQ01 which spans period AD 1639-1753 NOAA Template Raw Measurements file added 2020-03-09. July 2024: Elevation added by WDS-Paleo using get_elev_point() from the elevatr R package with the AWS Terrain Tiles (aws) and WGS 84 reference frame.
DOI: 10.25921/k5pf-n356
title: NOAA/WDS Paleoclimatology - Sniderhan - Southern Old Black Spruce - PCMA - ITRDB CANA613

description: Northwestern Canada's boreal forest has experienced rapid warming, drying, and changes to permafrost, yet the growth responses and mechanisms driving productivity have been understudied at broad scales. Forest responses are largely driven by black spruce - the region's most widespread and dominant tree. We collected tree-ring samples from four black spruce-dominated sites across 15 degrees of latitude, spanning gradients in climate and permafrost. We investigated (1) differences in growth patterns, (2) variations in climatic drivers of growth, and (3) trends in water use efficiency (WUE) through 13C isotope analysis from 1945 - 2006. We found positive growth trends at all sites except mid-latitude, where rapid permafrost thaw drove declines. Annual growth was lowest at the tree limit site and highest at the treeline. Climatic drivers of these growth patterns varied; positive growth responses at the northerly sites were associated with warmer winters, whereas d13C trends and climate-growth responses at mid-latitude sites indicated growth was limited by moisture availability. d13C signatures indicated increased WUE at the southernmost site, with no significant trends at northern sites. These results suggest that warming will increase growth of trees at black spruce's northern extent, but southerly areas may face drought stress if precipitation does not balance evapotranspiration.
description: Tree ring sampled; trees were sampled extensively (living and dead stems) using an increment borer from three 10 x 10 m plots and two 5 x 5 m plots in 2012. Variable plot sizes were used to achieve similar sample size amongst plots with differing stem densities. Additional trees were sampled from two sets of transects in 2015, where a core sample was taken from the nearest dominant or co-dominant tree every 5 m along two parallel 45 m transects, 25 m apart. Subsample of tree for delta 13C analysis. NOAA Template Raw Measurements file added 2020-11-18.
DOI: 10.25921/kh9n-5t21
title: NOAA/WDS Paleoclimatology - Treml - Tatranská Lomnica - PISY - ITRDB SVK014

description: Extreme tree growth reductions represent events of abrupt forest productivity decline and carbon sequestration reduction. An increase in their magnitude can represent an early warning signal of impending tree mortality. Yet the long-term trends in extreme growth reductions remain largely unknown. We analyzed the trends in the proportion of trees exhibiting extreme growth reductions in two Central-European conifer species - Pinus sylvestris (PISY) and Picea abies (PCAB) - between 1901 and 2018. We used a novel approach for extreme growth reduction quantification by relating their size to their mean recurrence interval. Twenty-eight sites throughout Czechia and Slovakia with 1120 ring width series representing high- and low-elevation forests were inspected for extreme growth reductions with recurrence intervals of 15 and 50 years along with their link to climatic drivers. Our results show the greatest growth reductions at low-elevation PCAB sites, indicating high vulnerability of PCAB to drought. The proportions of trees exhibiting extreme growth reductions increased over time at low-elevation PCAB, decreased recently following an abrupt increase in the 1970-1980s at high-elevation PCAB, and showed nonsignificant trends in high- and low-elevation PISY. Climatic drivers of extreme growth reductions, however, shifted over time for all site categories as the proportion of low-temperature-induced extreme growth reductions declined since the 1990s, whereas events caused by drought consistently increased in frequency during the same period. We observed higher growth volatility at the lower range of distribution compared with the upper range margin of PISY and PCAB. This will undoubtedly considerably impact tree growth and vitality as temperatures and incidence of drought in Central Europe are expected to further increase with ongoing climate change.
description: Extreme growth reductions in Central-European Pinus sylvestris (PISY) and Picea abies (PCAB). NOAA Template Raw Measurements file added 2021-12-29.