cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.9w8reb
title: Occurrence Download

description: A dataset containing 167 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Material sample, Material citation, Specimen)",
 "Country is Mexico",
 "Geometry POLYGON((-126.96097 22.42411,-89.83787 22.42411,-89.83787 37.27335,-126.96097 37.27335,-126.96097 22.42411))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Notiosorex crawfordi"
 ]
}

 The dataset includes 167 records from 33 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0021062-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/jcrs-d935
title: NOAA/WDS Paleoclimatology - Barclay - Tebenkof Glacier Hemlock A - TSME - ITRDB AK167

description: Tree-ring crossdates from glacially killed logs show that Tebenkof Glacier advanced into a forefield forest in the AD 710s and 720s. Recession from this First Millennium AD (FMA) advance occurred before the 950s, after which the ice margin readvanced in the 1280s to 1320s at the start of the Little Ice Age (LIA). A more extensive LIA advance was underway from the 1640s to 1670s, and the terminus stayed at or near its LIA maximum until the 1890s. These are the first absolute tree-ring crossdates for a FMA glacier advance in North America and support growing evidence from northwestern North America and Europe for a significant cool interval in the centuries around AD 500.
description:  NOAA Template Chronology file added 2020-05-12.
DOI: 10.25921/jsa2-6b42
title: NOAA/WDS Paleoclimatology - Gutiérrez - Sierra de Cazorla - PINI - ITRDB SPAI082

description: Aim

The aim was to decipher Europe‐wide spatio-temporal patterns of forest growth dynamics and their associations with carbon isotope fractionation processes inferred from tree rings as modulated by climate warming.
Location

Europe and North Africa (30-70 N, 10 W-35 E).
Time period

1901-2003.
Major taxa studied

Temperate and Euro-Siberian trees.
Methods

We characterize changes in the relationship between tree growth and carbon isotope fractionation over the 20th century using a European network consisting of 20 site chronologies. Using indexed tree-ring widths (TRWi), we assess shifts in the temporal coherence of radial growth across sites (synchrony) for five forest ecosystems (Atlantic, boreal, cold continental, Mediterranean and temperate). We also examine whether TRWi shows variable coupling with leaf-level gas exchange, inferred from indexed carbon isotope discrimination of tree-ring cellulose (Delta13Ci).

Results

We find spatial autocorrelation for TRWi and Delta13Ci extending over a maximum of 1,000 km among forest stands. However, growth synchrony is not uniform across Europe, but increases along a latitudinal gradient concurrent with decreasing temperature and evapotranspiration. Latitudinal relationships between TRWi and Delta13Ci (changing from negative to positive southwards) point to drought impairing carbon uptake via stomatal regulation for water saving occurring at forests below 60 N in continental Europe. An increase in forest growth synchrony over the 20th century together with increasingly positive relationships between TRWi and Delta13Ci indicate intensifying impacts of drought on tree performance. These effects are noticeable in drought-prone biomes (Mediterranean, temperate and cold continental).
Main conclusions

At the turn of this century, convergence in growth synchrony across European forest ecosystems is coupled with coordinated warming-induced effects of drought on leaf physiology and tree growth spreading northwards. Such a tendency towards exacerbated moisture-sensitive growth and physiology could override positive effects of enhanced leaf intercellular CO2 concentrations, possibly resulting in Europe‐wide declines of forest carbon gain in the coming decades.
description: NOAA Template Raw Measurements file added 2020-01-15.
DOI: 10.25921/j7zg-yt84
title: NOAA/WDS Paleoclimatology - Therrell - Hinds Road Outcrop - QUBN - ITRDB AL004

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: Hinds Road Outcrop, Etowah County, February 2018, Boynton's Oak. NOAA Template Raw Measurements file added 2020-01-15.
DOI: 10.25921/j9dt-je02
title: NOAA/WDS Paleoclimatology - de Graauw - The Barracks - QUAL - ITRDB WV015

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: Chronology derived from log building (The Barracks; BAR1). NOAA Template Raw Measurements file added 2020-03-09.
DOI: 10.25921/jbpt-j882
title: NOAA/WDS Paleoclimatology - South China Sea Planktonic Foraminifer Mg/Ca and d18O Data and Ocean Heat Content (OHC) Reconstruction during the last 21 kyr

description: Ocean heat content (OHC) plays an important role in controlling changes in Earth’s climate. However, relatively little research has been conducted into changes in OHC over a millennial scale, or into the mechanisms that control OHC migration in the ocean’s interior. This paucity of research is largely due to the lack of subsurface proxy records. Here, we analyzed planktonic Mg/Ca and δ18O records from species with different calcification depths to reconstruct the thermal structure of the water column and upper OHC changes since 21 kyr B.P. in the South China Sea. The results revealed that temperatures at intermediate and lower thermocline depths were warm during the last the deglaciation and became cool during the Holocene. The water cooling at ∼700 m began at 14.3 kyr B.P., but was delayed until 12.9 kyr B.P. at ∼325 m, and until 9.2 kyr B.P. at ∼250 m. In addition, upper thermocline temperatures at ∼100 m also started to decline at ca. 7.3 kyr B.P. Simultaneously, intermediate and thermocline OHC values were high during the last deglaciation, but surface OHC was low. We infer, therefore, that more heat was stored at intermediate depths during the last deglaciation, and that the upward release of the intermediate OHC resulted in the sequential delays in the cooling of intermediate to upper thermocline water. By combining these results with tropical Pacific records, we also hypothesize that the release of deeper OHC was perhaps the heat source for low-latitude processes during the Holocene.
description: Paleo-temperatures were calculated using the equations of Dekens et al. (2002) for Globigerinoides ruber(white), Anand et al. (2003) for Pulleniatina obliquiloculata and Globorotalia truncatulinoides (dextral), Cleroux et al. (2008) for Globorotalia inflata and Yu and Elderfield (2008) for Globorotalia scitula. planktonic foraminifer G. ruber, G. truncatulinoides, G. inflata and G. scitula data are from site SO204B , P.obliquiloculata data are from site GHE 27L	
   Provided keywords: water temperature, Ocean Heat Content
DOI: 10.25921/j8yf-cw53
title: NOAA/WDS Paleoclimatology - Taiwan 818 Year Tree-Ring Oxygen Isotope Data and Niño4 SST Reconstruction

description: The far-reaching impacts of central Pacific El Niño events on global climate differ appreciably from those associated with eastern Pacific El Niño events. Central Pacific El Niño events may become more frequent in coming decades as atmospheric greenhouse gas concentrations rise, but the instrumental record of central Pacific sea-surface temperatures is too short to detect potential trends. Here we present an annually resolved reconstruction of NIÑO4 sea-surface temperature, located in the central equatorial Pacific, based on oxygen isotopic time series from Taiwan tree cellulose that span from 1190 AD to 2007 AD. Our reconstruction indicates that relatively warm Niño4 sea-surface temperature values over the late twentieth century are accompanied by higher levels of interannual variability than observed in other intervals of the 818-year-long reconstruction. Our results imply that anthropogenic greenhouse forcing may be driving an increase in central Pacific El Niño-Southern Oscillation variability and/or its hydrological impacts, consistent with recent modelling studies.
description: Tree-ring d18O data from Mt. Daxue, Taiwan, plus Nino4 SST anomaly reconstruction
DOI: 10.25921/jfnb-ty97
title: NOAA/WDS Paleoclimatology - Wilson - Eagle 12 - PCGL - ITRDB CANA596

description: In north-western North America, the so-called divergence problem (DP) is expressed in tree ring width (RW) as an unstable temperature signal in recent decades. Maximum latewood density (MXD), from the same region, shows minimal evidence of DP. While MXD is a superior proxy for summer temperatures, there are very few long MXD records from North America. Latewood blue intensity (LWB) measures similar wood properties as MXD, expresses a similar climate response, is much cheaper to generate and thereby could provide the means to profoundly expand the extant network of temperature sensitive tree-ring (TR) chronologies in North America. In this study, LWB is measured from 17 white spruce sites (Picea glauca) in south-western Yukon to test whether LWB is immune to the temporal calibration instabilities observed in RW. A number of detrending methodologies are examined. The strongest calibration results for both RW and LWB are consistently returned using age-dependent spline (ADS) detrending within the signal-free (SF) framework. RW data calibrate best with June-July maximum temperatures (Tmax), explaining up to 28% variance, but all models fail validation and residual analysis. In comparison, LWB calibrates strongly (explaining 43-51% of May-August Tmax) and validates well. The reconstruction extends to 1337 CE, but uncertainties increase substantially before the early 17th century because of low replication. RW-, MXD- and LWB-based summer temperature reconstructions from the Gulf of Alaska, the Wrangell Mountains and Northern Alaska display good agreement at multi-decadal and higher frequencies, but the Yukon LWB reconstruction appears potentially limited in its expression of centennial-scale variation. While LWB improves dendroclimatic calibration, future work must focus on suitably preserved sub-fossil material to increase replication prior to 1650 CE.
description: NOAA Template Raw Measurements file added 2020-03-09.
DOI: 10.25921/j9s7-0t85
title: NOAA/WDS Paleoclimatology - Wilson - Rose River - PCGL - ITRDB CANA605

description: In north-western North America, the so-called divergence problem (DP) is expressed in tree ring width (RW) as an unstable temperature signal in recent decades. Maximum latewood density (MXD), from the same region, shows minimal evidence of DP. While MXD is a superior proxy for summer temperatures, there are very few long MXD records from North America. Latewood blue intensity (LWB) measures similar wood properties as MXD, expresses a similar climate response, is much cheaper to generate and thereby could provide the means to profoundly expand the extant network of temperature sensitive tree-ring (TR) chronologies in North America. In this study, LWB is measured from 17 white spruce sites (Picea glauca) in south-western Yukon to test whether LWB is immune to the temporal calibration instabilities observed in RW. A number of detrending methodologies are examined. The strongest calibration results for both RW and LWB are consistently returned using age-dependent spline (ADS) detrending within the signal-free (SF) framework. RW data calibrate best with June-July maximum temperatures (Tmax), explaining up to 28% variance, but all models fail validation and residual analysis. In comparison, LWB calibrates strongly (explaining 43-51% of May-August Tmax) and validates well. The reconstruction extends to 1337 CE, but uncertainties increase substantially before the early 17th century because of low replication. RW-, MXD- and LWB-based summer temperature reconstructions from the Gulf of Alaska, the Wrangell Mountains and Northern Alaska display good agreement at multi-decadal and higher frequencies, but the Yukon LWB reconstruction appears potentially limited in its expression of centennial-scale variation. While LWB improves dendroclimatic calibration, future work must focus on suitably preserved sub-fossil material to increase replication prior to 1650 CE.
description: NOAA Template Raw Measurements file added 2020-03-09.
DOI: 10.25921/jj57-2087
title: NOAA/WDS Paleoclimatology - North Atlantic DSDP610A Pliocene Mg/Ca Sea Surface Temperature Reconstruction

description: The North Atlantic Current (NAC) as part of the Atlantic Meridional Overturning Circulation (AMOC) is the major supplier of heat into the northern North Atlantic. Pliocene changes of AMOC strength were speculated to either have amplified or diminished the Northern Hemisphere Glaciation (NHG) 2.7 million years ago (Ma). However, from the North Atlantic, little evidence is known about AMOC changes at around 3.6 Ma. At this time the intensification of NHG started and culminated in the first major glacial M2 event at 3.3 Ma. To elaborate the climatic effects of variations in the NAC during this early stage of NHG, we here present millennial-scale resolved records from Deep Sea Drilling (DSDP) Site 610A in the northern North Atlantic. Our data of planktic foraminiferal Mg/Ca-based sea surface temperatures (SSTMg/Ca) and ice volume corrected salinity approximations (d18OIVC-seawater) span the critical time period 4-3.3 Ma. From 3.65 to 3.5 Ma, we observe a distinct ~3.5 C cooling and ~0.7 permil freshening of the sea surface, which we interpret to reflect a weakened NAC. At the same time Arctic sea ice grew and benthic d13C in the South Atlantic suggest a weakened AMOC. We conclude that the weakened NAC in response to a sluggish AMOC fostered sea ice formation in the Arctic Ocean and high-latitude North Atlantic, which might have preconditioned the climate for subsequent continental glaciations.
description: Pliocene North Atlantic Mg/Ca Sea Surface Temperature reconstruction from DSDP 610A G. bulloides
DOI: 10.15468/dl.3c635n
title: Occurrence Download

description: A dataset containing 9615 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Salix lasiolepis)",
 "StateProvince is one of (Arizona, California, Idaho, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Nevada, New Mexico, Oregon, Texas, Utah, Washington)",
 "BasisOfRecord is Specimen"
 ]
}

 The dataset includes 9615 records from 126 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0021061-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/jjgh-f723
title: NOAA/WDS Paleoclimatology - Barclay - Copper River Delta Hemlock B - TSME - ITRDB AK170

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: 10.25921/jnex-qv96
title: NOAA/WDS Paleoclimatology - Barclay - Copper River Delta Spruce B - TSME - ITRDB AK172

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: 10.25921/j8eg-t483
title: NOAA/WDS Paleoclimatology - Global Ocean Last Interglacial Sea Surface Temperature Reconstructions

description: A valuable analogue for assessing Earth's sensitivity to warming is the Last Interglacial (LIG; 129-116 kyr), when global temperatures (0-+2 C) and mean sea level (+6-11 m) were higher than today. The direct contribution of warmer conditions to global sea level (thermosteric) are uncertain. We report here a global network of LIG sea surface temperatures (SST) obtained from various published temperature proxies (e.g. faunal/floral assemblages, Mg/Ca ratios of calcareous plankton, alkenone UK'37). Each reconstruction is averaged across the LIG (anomalies relative to 1981-2010), corrected for ocean drift and with varying seasonality (189 annual, 99 December-February, and 92 June-August records). We summarise the current limitations of SST reconstructions for the LIG and the spatial temperature features of a naturally warmer world. Because of local d18O seawater changes, uncertainty in the age models of marine cores, and differences in sampling resolution and/or sedimentation rates, the reconstructions are restricted to mean conditions. To avoid bias towards individual LIG SSTs based on only a single (and potentially erroneous) measurement or a single interpolated data point, here we average across the entire LIG. To investigate the sensitivity of the reconstruction to high temperatures, we also report maximum values during the first 5 ka of the LIG (129-124 kyr). The global dataset provides a remarkably coherent pattern of higher SST increases at polar latitudes than in the tropics, with comparable estimates between different SST proxies. We report mean global annual SST anomalies of 0.2 ± 0.1 C and a maximum of 0.9 ± 0.2 C respectively. Using the reconstructed SSTs suggests a mean thermosteric sea level rise of 0.01 ± 0.1 m and a maximum of 0.13 ± 0.1 m respectively. The data provide an important natural baseline for a warmer world, constraining the contributions of Greenland and Antarctic ice sheets to global sea level during a geographically widespread expression of high sea level, and can be used to test the next inter-comparison of models for projecting future climate change.
description: Compilation of published sea surface temperature reconstructions for the Last Interglacial interval (LIG; ~129,000-116,000 years before present), and comparison with late Marine Isotope Stage 6 (140-135 kyr) SSTs.
DOI: 10.25921/jsrz-j704
title: NOAA/WDS Paleoclimatology - The European Russia Drought Atlas (ERDA) Reconstruction of PDSI from 1400 - 2016 CE

description: We present a new drought atlas for the East European or Russian Plain extending from eastern Europe to the Ural Mountains:  the European Russia Drought Atlas or ERDA. Like the Old World Drought Atlas (OWDA) for the Euro-Mediterranean region, the ERDA is a one-half degree gridded reconstruction of summer Palmer Drought Severity Indices estimated from a network of annual tree-ring chronologies in European Russia and surrounding countries. Ensemble point-by-point regression was used to generate the ERDA with the identical protocols used for developing the OWDA. Split calibration/validation tests of the ERDA indicate that it has significant skill over most of its domain and is more skillful than the OWDA over their joint domains in western Russia. Comparisons to historical droughts over European Russia further support the ERDA's overall validity. The ERDA has been spatially smoothed and infilled using a local regression method to yield a spatially complete drought atlas back to 1400 CE. EOF analysis indicates that there are three principal modes of hydroclimatic variability in the ERDA. After Varimax rotation, these modes correlate significantly with independent climate data sets extending back to the late 19th century in a physically interpretable way and relate to atmospheric circulation dynamics of droughts and heatwaves over European Russia based on more recent instrumental data.