cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/7gsm-a397
title: NOAA/WDS Paleoclimatology - DeRose - Jardine Juniper Trail - JUSC - ITRDB UT532

description: We created six new tree-ring chronologies in northern Utah, which were used with preexisting chronologies from Utah and western Wyoming to reconstruct mean annual flow for the Logan River, the largest tributary of the regionally important Bear River. Two reconstruction models were developed, a "Local" model that incorporated two Rocky Mountain juniper chronologies located within the basin, and a "Regional" model that also included limber pine and pinyon pine chronologies from a larger area. The Local model explained 48.2% of the variability in the instrumental record and the juniper chronologies better captured streamflow variability than Douglas-fir collected within the Logan basin. Incorporating chronologies from the northern and southern margins of the transition zone of the western precipitation dipole increased the skill of the Regional model (r2 = 0.581). We suggest the increased Regional model skill indicates that both nodes of the western precipitation dipole influence northern Utah climate. The importance of Rocky Mountain juniper in both reconstructions of streamflow for this region suggests that future work should target these trees where more traditionally desirable species are not present. The reconstructions provide the first extended record of streamflow in northern Utah. Preinstrumental streamflows (1605-1921) exhibited considerable variability when compared to the instrumental period (1922-2005). Our findings confirm that the inherent uncertainty in contemporary water management and planning in the region is due to hydroclimatic variability that has persisted for at least the last four centuries.
description: NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/7d6c-xb28
title: NOAA/WDS Paleoclimatology - Luckman - Sulphur Mountain - PCEN - ITRDB CANA451

description: A new network of 21 Picea engelmannii Parry ex Engelm. ring-width chronologies was developed from tree-line sites in the Canadian Rockies. These chronologies range in length from 297 to 648 years (mean 423 years) and have mean sensitivities between 0.16 and 0.20 (mean 0.18), first-order autocorrelations between 0.73 and 0.88 (mean 0.83), and subsample signal strengths >0.85 for 246-494 years (mean 324 years). Mean intersite correlations (A.D. 1700-1982) for chronologies with expressed population signals >0.85 are 0.46 and 0.63 for standard and residual chronologies, respectively. Standard ring-width chronologies are, in general, positively correlated with summer temperatures and negatively correlated with spring and previous summer temperatures. A regional June-September temperature reconstruction for the Banff-Jasper region (BJR; A.D. 1715-1982) was developed using multiple regression of three significant principal components from 14 standard ring-width chronologies. The first principal component contains 55% of the total chronology variance. The model reconstructs 38% of summer temperature variance during the calibration period (1888-1982). The BJR is the first regional temperature reconstruction for this area based on ring-width data from a network of sites. The reconstructed temperature patterns are broadly similar to other regional estimates of past temperatures. Above-average summer temperatures occurred in the mid-20th century and the late 1700s - early 1800s. Most of the 19th century was unusually cold, with the coldest conditions in the late 19th century. Detailed differences between BJR and previously developed reconstructions lie well within 2 sigma confidence limits and may reflect differences in tree species, modelling techniques, spatial coverage, and the seasonal temperature parameter reconstructed.
description: NOAA Template Raw Measurements file added 2019-02-04.
DOI: 10.25921/7798-6762
title: NOAA/WDS Paleoclimatology - Büntgen - Ritena - PISY - ITRDB SWIT328

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: Collection purpose: 
# dendroclimatology
# 
# Cores are stored at: 
# WSL
# 
# Notes: 
# Formerly rw00497rit04 NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/7fb3-ba56
title: NOAA/WDS Paleoclimatology - Büntgen - Riddes - PISY - ITRDB SWIT321

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: Collection purpose: 
# dendroclimatology
# 
# Formerly rw00491rid01 NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/7n59-ek83
title: NOAA/WDS Paleoclimatology - Colenutt - Wolverine Pass - LALY - ITRDB CANA425

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
# # 
# # References:
# # Colenutt M.  2000.  
# # Climate reconstruction in the southern Canadian Rockies using tree-ring data from alpine larch.  
# # PhD dissertation, University of Western Ontario, London, Ontario. NOAA Template Raw Measurements file added 2019-01-27. NOAA Template Raw Measurements file added 2019-02-04.
DOI: 10.25921/7707-6341
title: NOAA/WDS Paleoclimatology - Bräker - La Grandsonne Dessous Les Pr - PCAB - ITRDB SWIT291

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: Formerly La_Grandsonne_Fichte_Bestand_n11_1995.fh NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/7hmy-rv71
title: NOAA/WDS Paleoclimatology - El Junco Lake, Galapagos Diatom T/E Index Data

description: Through its intimate connection with the El Nino/Southern Oscillation system, climate variability in the tropical Pacific Ocean influences climate across much of the planet. But the history of temperature change in the tropical Pacific Ocean during recent millennia is poorly known: the available annually resolved records are discontinuous and rarely span more than a few centuries. Longer records at coarser temporal resolution suggest that significant oceanographic changes, observed at multi-year to multi-century resolution, have had important effects on global climate. Here we use a diatom record from El Junco Lake, Galapagos, to produce a calibrated, continuous record of sea surface temperature in the eastern tropical Pacific Ocean at subdecadal resolution, spanning the past 1,200 years. Our reconstruction reveals that the most recent 50 years are the warmest 50-year period within 
the record.  Because our diatom-based sea surface temperature index resembles Northern Hemisphere temperature reconstructions, we suggest that with continued anthropogenic warming, the eastern tropical Pacific Ocean may continue to warm.
description: El Junco Lake, Galapagos tychoplanktonic to epiphytic (T:E) diatom index, with the corresponding sampling depths and ages in Year AD (calibrated radiocarbon, 210Pb and 137Cs age model).  Age model data is published in Conroy et al. (2008).

ADDITIONAL REFERENCE:
Conroy, J.L., J.T. Overpeck, J.E. Cole, T.M. Shanahan, and M. Steinitz-Kannan. 2008. Holocene changes in eastern tropical Pacific climate inferred from a Galapagos lake sediment record. Quaternary Science Reviews, 27(11-12): 1166-1180.
DOI: 10.25921/7ebm-4a29
title: NOAA/WDS Paleoclimatology - Asian 1,100 Year Multiproxy Gridded Summer Temperature Reconstructions

description: To investigate climate variability in Asia during the last millennium, the spatial and temporal evolution of summer (June-July-August; JJA) temperature in eastern and south-central Asia is reconstructed using multi-proxy records and the regularized expectation maximization (RegEM) algorithm with truncated total least squares (TTLS), under a point-by-point regression (PPR) framework. The temperature index reconstructions show that the late 20th century was the warmest period in Asia over the past millennium. The temperature field reconstructions illustrate that temperatures in central, eastern, and southern China during the 11th and 13th centuries, and in western Asia during the 12th century, were significantly higher than those in other regions, and comparable to levels in the 20th century. Except for the most recent warming, all identified warm events showed distinct regional expressions and none were uniform over the entire reconstruction area. The main finding of the study is that spatial temperature patterns have, on centennial time-scales, varied greatly over the last millennium. Moreover, seven climate model simulations, from the Coupled Model Intercomparison Project Phase 5 (CMIP5), over the same region of Asia, are all consistent with the temperature index reconstruction at the 99 % confidence level. Only spatial temperature patterns extracted as the first empirical orthogonal function (EOF) from the GISS-E2-R and MPI-ESM-P model simulations are significant and consistent with the temperature field reconstruction over the past millennium in Asia at the 90 % confidence level. This indicates that both the reconstruction and the simulations depict the temporal climate variability well over the past millennium. However, the spatial simulation or reconstruction capability of climate variability over the past millennium could be still limited. For reconstruction, some grid points do not pass validation tests and reveal the need for more proxies with high temporal resolution, accurate dating, and sensitive temperature signals, especially in central Asia and before AD 1400.
description: Gridded and region-wide Asian summer (June-July-August) temperature reconstructions for the past 1,100 years. The reconstructions are based on 357 publicly available proxy climate data series from the World Data Center for Paleoclimatology archives (See Shi et al. 2015 supplementary Materials for details).  The gridded reconstructions are at 5 x 5 degree resolution.
DOI: 10.25921/7as6-1j91
title: NOAA/WDS Paleoclimatology - Scharnweber - Holzkrug - FASY - ITRDB GERM221

description: For north-eastern Germany regional climate models project rising temperatures in combination with decreasing summer and increasing winter precipitation. The resulting overall drier conditions during the growing season will considerably impact forest growth there. We evaluate the consequences of increasing drought on the growth of the two locally most important broadleaf tree species common beech (Fagus sylvatica L.) and pedunculate oak (Quercus robur L.). Three mixed forests of beech and oak were sampled along a west-east gradient of declining precipitation. In total we used 257 ring-width samples from 133 trees to build six species and site specific chronologies. Additionally, we modelled the soil water budget for each site. We performed continuous and discontinuous (pointer year) analysis of climate-tree-growth relationships with particular emphasis on inter-annual-variations and their dependence upon climatic factors (temperature, precipitation, soil moisture) and on the stability of the obtained relationships. Results of climate-growth correlations together with pointer year analysis indicate a strong dependency of growth of both species from water availability, especially during early summer (June and July). General correlation pattern between growth and climate are similar for both species, but climate sensitivity of beech is generally higher. We identified drought as the main driver of negative growth depressions in both species. Increasing drought stress along the gradient is expressed in higher correlations to climatic variables, higher sensitivity (variance) of growth, and a higher number of negative pointer years for both species. For beech we also found a significant trend of decreasing average growth rates along the gradient. Growth superiority of beech compared to oak declines with decreasing precipitation. The relationships were generally stable throughout the 20th century. A rise of sensitivity together with a higher frequency of negative pointer years during the last decades suggests that increasing climatic variability together with rising temperatures might be influencing growth of Fagus at the more humid sites. If we substitute space by time it seems that already small changes in precipitation regime can have considerable impact, especially on the growth of beech. Other, more drought tolerant species like oak might gain competitive advantages under the projected climatic changes.
description: NOAA Template Raw Measurements file added 2019-02-05. 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: 10.25921/78ed-n219
title: NOAA/WDS Paleoclimatology - GRIP Ice Core Depth Age by Stratigraphy

description: Records of past temperature, precipitation, atmospheric trace gases, and other aspects of climate and environment derived from ice cores drilled on glaciers and ice caps around the world.  Parameter keywords describe what was measured in this data set.  Additional summary information can be found in the abstracts of papers listed in the data set citations.

description: This file shows ages and depths and average accumulation rates related to significant climatic changes over the past 60 ka in the GRIP ice core.  The ages and the names of climate intervals are based on stratigraphy (Hammer et al., 1997), rather than the flow-model of Johnsen et al. (1997). 

REFERENCES:
Hammer, C.U., K.K. Andersen, H.B. Clausen, D. Dahl-Jensen, C.S. Hvidberg,
and P. Iversen. 1997. The stratigraphic dating of the GRIP ice core.
Special Report of the Geophysical Department, Niels Bohr Institute for
Astronomy, Physics and Geophysics, University of Copenhagen.

Johnsen, S.J., H.B. Clausen, W. Dansgaard, N.S. Gundestrup, C.U. Hammer, U.
Andersen, K.K. Andersen, C.S. Hvidberg, D. Dahl-Jensen, J.P. Steffensen, H.
Shoji, A.E. Sveinbjornsdottir, J.W.C. White, J. Jouzel, and D. Fisher.
1997. The d18O record along the Greenland Ice Core Pproject deep ice core
and the problem of possible Eemian climatic instability. Journal of
Geophysical Research 102:26397-26410.
DOI: 10.25921/77xz-vx87
title: NOAA/WDS Paleoclimatology - Laguna Potrok Aike, Argentina Stage 3 Sediment Data

description: Seismic reflection studies in the maar lake Laguna Potrok Aike (51°58' S, 70°23' W) revealed an erosional unconformity associated with a sub-aquatic lake-level terrace at a water depth of 30m. Radiocarbon-dated, multi-proxy sediment studies of a piston core from this location indicate that the sediment below this discontinuity has an age of 45kyr BP (Oxygen Isotope Stage 3), and was deposited during an interval of high lake level. In comparison to the Holocene section, geochemical indicators of this older part of the record either point towards a different sediment source or to a different transport mechanism for Oxygen Isotope Stage 3 sediments. Holocene sedimentation started again before 6790cal. yr BP, providing a sediment record of hydrological variability until the present. Geochemical and isotopic data indicate a fluctuating lake level until 5310cal. yr BP. During the late Holocene the lake level shows a receding tendency. Nevertheless, the lake level did not drop below the  30m terrace to create another unconformity. The geochemical characterization of volcanic ashes reveals evidence for previously unknown explosive activity of the Reclús and Mt. Burney volcanoes during Oxygen Isotope Stage 3.
description: Multiproxy record from a submerged lake level terrace (30-35 m below present lake level) with a hiatus that ended around 7000 cal. BP and which is indicative for a major drought. The duration of the hiatus is unknown up to now.
DOI: 10.25921/7szs-jx58
title: NOAA/WDS Paleoclimatology - Walker et al. 2003 Canada Chironomid Data

description: To ascertain the extent of recent impacts, and to develop realistic goals for water quality improvement, a palaeolimnological assessment of human impact on Wood Lake, British Columbia, Canada was initiated in 1992. Geochemical and microfossil analyses on a series of short cores provided a detailed record of human impact since European settlement.

Early post-settlement sediments consisted of clastic materials rich in Mg, Al, Fe, P and associated metals. An abrupt increase in marl deposition occurred about 1940, perhaps in response to diversion of inflowing water for irrigation and/or an increase in algal productivity. Mo analyses provided a record of increasing hypolimnetic anoxia with eutrophication. Hg concentrations were highest in sediments deposited during the past decade.

Microfossil analyses (chironomids, diatoms, chrysophytes) depicted the lake's progressive eutrophication, and the disappearance of the profundal bottom fauna. Water quality improvements have been reported since 1975, but benthic invertebrate communities have recovered only slightly. The diatoms may indicate a modest water quality improvement over the last 20 years.

Wood Lake was formerly an oligo-mesotrophic lake with a well-developed profundal fauna. Appropriate mitigative programmes could substantially improve water quality, perhaps allowing re-establishment of the natural oligo-mesotrophic condition.
description: Chironomid data from lake cores from British Columbia, Nova Scotia, 
and New Brunswick.   These data are in zipped Tilia 2.0 files with 
accompanying forms. 

The sites are: Cabin Lake, BC, Hippa Lake, BC; Marion Lake, BC; 
Mike Lake, BC; Misty Lake, BC; Tugulnuit Lake, BC, Wood Lake, BC; 
Basswood Road Lake/Splan Pond, NB; and Brier Island Bog, NS.

REFERENCES: 
Walker, I.R., E.D. Reavie, S. Palmer, and R.N. Nordin.  1993.
A Palaeoenvironmental assessment of human impact on Wood Lake, 
Okanagan Valley, British Columbia, Canada.  
Quaternary International, Vol. 20, pp. 51-70.

Smith, M.J., M.G. Pellatt, I.R. Walker, and R.W. Mathewes.  1998.
Postglacial changes in chironomid communities and inferred climate 
near treeline at Mount Stoyoma, Cascade Mountains, southwestern 
British Columbia, Canada.
Journal of Paleolimnology 20: 277-293, 1998.


Wilson, S.E., I.R. Walker, R.J. Mott, and J.P. Smol.  1993.
Climatic and limnological changes associated with the Younger
Dryas in Atlantic Canada. 
Climate Dynamics, Vol. 8 pp. 177-187.
DOI: 10.5523/bris.2kjrzkd739xgm25tm5m9sckpjw
title: Data from: Grohganz et al. (2025) Investigating the morphogenesis and replacement of lamprey toothlets using synchrotron imaging. Journal of Morphology

description: The data accompanies the following paper: Madleen Grohganz, Jake Leyhr, Zerina Johanson, Tatjana Haitina, Sophie Sanchez, Kathleen Dollman, Jan Stundl, Marianne Bronner, Gareth Fraser, Philip Donoghue. 2025. Investigating the morphogenesis and replacement of lamprey toothlets using synchrotron imaging. Journal of Morphology.
DOI: 10.25921/7w46-ec22
title: NOAA/WDS Paleoclimatology - GISP2 Ice Core 110KYr Volcanic Markers and Insoluble Microparticles

description: Oscillations in the time series of insoluble microparticle characteristics between 0.7 and 11.0 um in the Greenland Ice Sheet Project 2 (GISP2) ice core reflect changes in environmental conditions in the Northern Hemisphere from 10 500 to 14 000 yr ago. Elevated values in microparticle number and mass, especially during the Younger Dryas, are related to Northern Hemisphere aridity and the subsequent increase in dust available for long-range transport to Greenland. This scenario occurs with the colder climatic conditions that result from a more expanded (spatially and temporally) polar vortex. Peaks in mean grain size based on number (mean number diameter) are a proxy for increased strength in zonal winds (westerlies). Highs in mean number diameter in the earlier part of the record often coincide with number and mass peaks reflecting the increased temperature and pressure gradients with an expanded polar vortex. Highs in mean grain size based on mass (mean mass diameter) reflect greater deposition of the coarser size fraction, and thus are a proxy for increased storminess associated with better developed synoptic-scale pressure systems in the northernmost Atlantic region. Peaks in mean mass diameter often lead these other parameters by 100-200 yr, suggesting an increase in storminess with the initial southward migration of the mean position of the polar front prior to full development of a more expanded polar vortex. The general decline in number and mass trends (decreased aridity with a contracting polar vortex) together with increasing mean number diameter trends (strengthening zonal winds) following the maxima in the early Younger Dryas suggest an expansion of mid-latitude circulation systems (subtropical highs), thereby maintaining latitudinal temperature and pressure gradients. Increased variability in mean mass diameter during the warm Preboreal, compared to the colder Younger Dryas, may be a function of the greater seasonality during warmer climatic periods, and thus more frequent storms associated with higher frequency oscillations in the position of the polar front with changing seasons and increased interannual variability in climate.
description: Volcanic sulfate record in the GISP2 core on the Meese/Sowers timescale.  Each sample is approximately bi-annual for the last ~12,000 years with a consistent increase in the time covered by each sample to around 50 years/sample at 110,000 years ago.  Insoluble microparticle concentrations data also included for the past 3000 years.