cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/dayj-vg37
title: NOAA/WDS Paleoclimatology - Hinterburgsee, Switzerland 13,000 Year Chironomid-inferred July Temperature

description: We developed a quantitative chironomid-July air temperature inference model based on surface sediments from 81 Swiss lakes and applied it to the Holocene subfossil chironomid record of Hinterburgsee, a small subalpine lake in the northern Swiss Alps (present-day mean July air temperature of 11.3°C). After smoothing to reduce the high between-sample variability of inferred temperatures, the reconstruction indicates July air temperatures of 10.4- 10.9°C at the end of the Younger Dryas, of 11.9-12.8°C during the early and mid-Holocene (11500-4000 cal. BP), and slightly lower temperatures of 11.5-12.0°C during the late Holocene (3500-1000 cal. BP). A warming trend inferred for the past millennium is most likely an artifact of human impact on Hinterburgsee's chironomid fauna, rather than a genuine temperature signal. The most prominent climatological events during the Holocene were two periods of lower temperatures at c. 10700-10500 cal. BP and 8200-7700 cal. BP and an abrupt shift to a cooler late-Holocene climate around 4000-3700 cal. BP. Although the chironomid-inferred climate signals were within the prediction error of the model (1.51°C), major inferred temperature changes agree well with other northern and central European climate reconstructions and underline the potential of subfossil chironomid analysis to reconstruct even the moderate climatic changes within the Holocene.
description: Chironomid-inferred July temperature estimates for Hinterburgsee, Switzerland for the past ~13,000 years. 
A quantitative chironomid-July air temperature inference model based on surface sediments from 81 Swiss lakes 
was applied to the subfossil chironomid record of Hinterburgsee, a small subalpine lake in the northern Swiss Alps.
The chironomid inferred July air temperature estimated standard error of prediction (Root mean square) is 1.51°C.
DOI: 10.25921/d5x4-1k75
title: NOAA/WDS Paleoclimatology - West Greenland Trough-Mouth Fan Sedimentary Data

description: Along the West Greenland continental margin adjoining Baffin Bay, bathymetric data show a series of large submarine fans located at the mouths of cross-shelf troughs. One of these fans, termed here ‘Uummannaq Fan’, is a trough-mouth fan built largely by debris delivered from a fast-flowing outlet of the Greenland Ice Sheet during past glacial maxima. Cores from this fan provide the first information on glacimarine sedimentary facies within a major West Greenland trough-mouth fan and on the nature of Late Weichselian–Holocene glacigenic sediment delivery to this region of the Baffin Bay margin. Glacigenic debris flows deposited on the upper slope and extending to at least 1800 m water depth in front of the trough-mouth are related to the remobilization of subglacial debris that was delivered onto the upper slope at times when an ice stream was positioned at the shelf edge. In contrast, sedimentary facies from the northern sector of the fan are characterized by hemipelagic and ice-rafted sediments and turbidites; glacigenic debris flows are notably absent in cores from this region. Quantitative X-ray diffraction studies of the <2-mm sediment fraction indicate that the bulk of the sediment in the fan is derived from Uummannaq Trough but there are distinct intervals when sediment from northern Baffin Bay sources dominates, especially on the northern limit of the fan. These data demonstrate considerable variation in the nature of sediment delivery across the Uummannaq Fan when the Greenland Ice Sheet was at the shelf edge. They highlight the variability of glacimarine depositional processes operating on trough-mouth fans on high-latitude continental margins during the last glacial maximum and indicate that glacigenic debris flows are just one of a number of mechanisms by which such large depocentres form.
DOI: 10.25921/d7f7-ty50
title: NOAA/WDS Paleoclimatology - Kenigsberg - Jubilee Mountain - ABLA - ITRDB CANA371

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: Purpose of Collection:
# # Climatology
# # 
# # Cores are stored at:
# # University of Western Ontario
# # 
# # Reference:
# # Kenigsberg, M.  2005.  The dendroclimatic potential of subalpine fir in the Canadian northwest.  
# # Unpublished M.Sc. Thesis, Department of Geography, The 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/d107-as26
title: NOAA/WDS Paleoclimatology - Kelly fire data from Granger Lake, Yukon Flats, Alaska - IMPD USGAL008

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 Chopper Lake sediments Yukon Flats, Alaska; 
Entity name, GA08 (Internal lab code); 
Contact person, Kelly R.; 
Sampling date, 2008-07-20;
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), 950;
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;
DOI: 10.15468/dl.wzw99e
title: Occurrence Download

description: A dataset containing 1349 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Abies nephrolepis"
 ]
}

 The dataset includes 1349 records from 88 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0006381-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/dbtj-xe05
title: NOAA/WDS Paleoclimatology - Kelly fire data from Landing Lake, Yukon Flats, Alaska - IMPD USCPL008

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 Chopper Lake sediments Yukon Flats, Alaska; 
Entity name, LD08 (Internal lab code); 
Contact person, Kelly R.; 
Sampling date, 2008-0718;
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), 420;
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;
DOI: 10.25921/dn3f-9546
title: NOAA/WDS Paleoclimatology - Woodhouse - Collins Gulch - PIED - CO595, PAGES North America 2K Version

description: Updated proxy reconstructions of water year (October-September) streamflow for four key gauges in the Upper Colorado River Basin were generated using an expanded tree ring network and longer calibration records than in previous efforts. Reconstructed gauges include the Green River at Green River, Utah; Colorado near Cisco, Utah; San Juan near Bluff, Utah; and Colorado at Lees Ferry, Arizona. The reconstructions explain 72-81% of the variance in the gauge records, and results are robust across several reconstruction approaches. Time series plots as well as results of cross-spectral analysis indicate strong spatial coherence in runoff variations across the subbasins. The Lees Ferry reconstruction suggests a higher long-term mean than previous reconstructions but strongly supports earlier findings that Colorado River allocations were based on one of the wettest periods in the past 5 centuries and that droughts more severe than any 20th to 21st century event occurred in the past.
DOI: 10.25921/dnsb-4h95
title: NOAA/WDS Paleoclimatology - East Greenland Shelf Sediment Data from 1850-1986 AD

description: The reduction in sea ice along the SE Greenland coast during the last century has severely impacted ice-rafting to this area. In order to reconstruct ice-rafting and oceanographic conditions in the area of Denmark Strait during the last ~150 yr we conducted a multi-proxy study on three short (20 cm) sediment cores from outer Kangerdlugssuaq Though (~300m water depth). The proxy-based data obtained has been compared with historical and instrumental data to gain a better understanding of the ice sheet-ocean interactions in the area. A robust chronology has been developed based on 210Pb and 137Cs measurements on core PO175GKC#9 (~66.2°N, 32°W) and expanded to the two adjacent cores based on correlations between calcite weight% records. Our proxy records include sea ice and phytoplankton biomarkers, and a variety of mineralogical determinations based on the <2 mm sediment fraction, including identification with quantitative X-ray diffraction, ice-rafted debris counts o! n the 63-150 Âµm sand fraction, and source identifications based on the composition of Fe oxides in the 45-250 Âµm fraction. A multivariate statistical analysis indicated significant correlations between our proxy records and historical data, especially with the mean annual temperature data from Stykkisholmur (Iceland) and the storis index (historical observations of sea ice export via the East Greenland Current). In particular, the biological proxies (calcite wt%, IP25, and TOC%) showed significant linkage with the storis index. Our records show two distinct intervals in the recent history of the SE Greenland coast. The first of these (AD 1850-1910) shows predominantly perennial sea ice conditions in the area, while the second (AD 1910-1990) shows more seasonally open water conditions.
description: In order to reconstruct ice-rafting and oceanographic conditions in the area of Denmark Strait during the last ~150 yr we conducted a multi-proxy study on three short (20 cm) sediment cores from outer Kangerdlugssuaq Trough (~300m water depth). The proxy-based data obtained has been compared with historical and instrumental data to gain a better understanding of the ice sheet-ocean interactions in the area. 
 A robust chronology has been developed based on 210Pb and 137Cs measurements on core PO175GKC#9 (~66.2°N, 32°W) and expanded to the two adjacent cores based on correlations between calcite weight% records. Our proxy records include sea ice and phytoplankton biomarkers, and a variety of mineralogical determinations based on the <2 mm sediment fraction, including identification with quantitative X-ray diffraction, ice-rafted debris counts on the 63-150 Âµm sand fraction, and source identifications based on the composition of Fe oxides in the 45-250 µm fraction.
DOI: 10.25921/d76w-h123
title: NOAA/WDS Paleoclimatology - Kenigsberg - Jade City - ABLA - ITRDB CANA369

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 2019-02-04.
DOI: 10.25921/d4kg-d685
title: NOAA/WDS Paleoclimatology - Luckman - Ruby Ridge - ABLA - ITRDB CANA379

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 2019-02-04.
DOI: 10.25921/d561-wp16
title: NOAA/WDS Paleoclimatology - Graumlich - Scatter Lake - LALY - WA061, 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/dp0c-g374
title: NOAA/WDS Paleoclimatology - Monteverde Cloud Forest, Costa Rica, Tree Cellulose d18O Data

description: Widespread amphibian extinctions in the mountains of the American tropics have been blamed on the interaction of anthropogenic climate change and a lethal pathogen. However, limited meteorological records make it difficult to conclude whether current climate conditions at these sites are actually exceptional in the context of natural variability. We use stable oxygen isotope measurements from trees without annual rings to reconstruct a century of hydroclimatology in the Monteverde Cloud Forest of Costa Rica. High-resolution measurements reveal coherent isotope cycles that provide annual chronological control and paleoclimate information. Climate variability is dominated by interannual variance in dry season moisture associated with El Niño Southern Oscillation events. There is no evidence of a trend associated with global warming. Rather, the extinction of the Monteverde golden toad (Bufo periglenes) appears to have coincided with an exceptionally dry interval caused by the 1986-1987 El Niño event.
description: Stable oxygen isotopes (d18O) measured at constant depth in two montane cloud forest trees (Pouteria, specimens MV12 and MV15), plus the d18O data on monthly age scale for the 2 trees and for a composite of both samples. IITRDB009
DOI: 10.25921/dj11-2x47
title: NOAA/WDS Paleoclimatology - Shao - Huashan HSS - PIAM - ITRDB CHIN057

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/dd0s-2c29
title: NOAA/WDS Paleoclimatology - TALDICE Ice Core 150KYr 1cm Calcium and Sodium Data

description: In this study we report on new non-sea salt calcium (nssCa2+, mineral dust proxy) and sea salt sodium (ssNa+, sea ice proxy) records along the East Antarctic Talos Dome deep ice core in centennial resolution reaching back 150 thousand years (ka) before present. During glacial conditions nssCa2+ fluxes in Talos Dome are strongly related to temperature as has been observed before in other deep Antarctic ice core records, and has been associated with synchronous changes in the main source region (southern South America) during climate variations in the last glacial. However, during warmer climate conditions Talos Dome mineral dust input is clearly elevated compared to other records mainly due to the contribution of additional local dust sources in the Ross Sea area. Based on a simple transport model, we compare nssCa2+ fluxes of different East Antarctic ice cores. From this multi-site comparison we conclude that changes in transport efficiency or atmospheric lifetime of dust particles do have a minor effect compared to source strength changes on the large-scale concentration changes observed in Antarctic ice cores during climate variations of the past 150 ka. Our transport model applied on ice core data is further validated by climate model data.

The availability of multiple East Antarctic nssCa2+ records also allows for a revision of a former estimate on the atmospheric CO2 sensitivity to reduced dust induced iron fertilisation in the Southern Ocean during the transition from the Last Glacial Maximum to the Holocene (T1). While a former estimate based on the EPICA Dome C (EDC) record only suggested 20 ppm, we find that reduced dust induced iron fertilisation in the Southern Ocean may be responsible for up to 40 ppm of the total atmospheric CO2 increase during T1. During the last interglacial, ssNa+ levels of EDC and EPICA Dronning Maud Land (EDML) are only half of the Holocene levels, in line with higher temperatures during that period, indicating much reduced sea ice extent in the Atlantic as well as the Indian Ocean sector of the Southern Ocean. In contrast, Holocene ssNa+ flux in Talos Dome is about the same as during the last interglacial, indicating that there was similar ice cover present in the Ross Sea area during MIS 5.5 as during the Holocene.
description: High-resolution (1-cm.) non-sea salt calcium and sea salt sodium data from the TALDICE ice core.
DOI: 10.25921/dstd-2w09
title: NOAA/WDS Paleoclimatology - Voelker - Current River Natural Area Update 2 - QUAL - ITRDB MO050

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