cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/hfp8-wm81
title: NOAA/WDS Paleoclimatology - Smith - Surprise Glacier - ABLA - ITRDB CANA499

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 2019-01-27. NOAA Template Raw Measurements file added 2019-02-04. 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/hw8a-4c28
title: NOAA/WDS Paleoclimatology - North Atlantic 3.2MYr Stable Isotope and Physical Properties Data

description: We present a 3.2 Myr record of stable isotopes and physical properties at IODP Site U1308 (reoccupation of DSDP Site 609) located within the ice-rafted detritus (IRD) belt of the North Atlantic. We compare the isotope and lithological proxies at Site U1308 with other North Atlantic records (e.g., sites 982, 607/U1313, and U1304) to reconstruct the history of orbital and millennial-scale climate variability during the Quaternary. The Site U1308 record documents a progressive increase in the intensity of Northern Hemisphere glacial-interglacial cycles during the late Pliocene and Quaternary, with mode transitions at  ~ 2.7, 1.5, 0.9, and 0.65 Ma. These transitions mark times of change in the growth and stability of Northern Hemisphere ice sheets. They also coincide with increases in vertical carbon isotope gradients between the intermediate and deep ocean, suggesting changes in deep carbon storage and atmospheric CO2. Orbital and millennial climate variability co-evolved during the Quaternary such that the trend towards larger and thicker ice sheets was accompanied by changes in the style, frequency, and intensity of millennial-scale variability. This co-evolution may be important for explaining the observed patterns of Quaternary climate change.
description: Foraminiferal stable isotope (d18O and d13C) and physical properties (natural gamma radiation) data from North Atlantic sediment cores for the past 3.2 million years
DOI: 10.25921/h00f-9p41
title: NOAA/WDS Paleoclimatology - Northeastern Caribbean Late Holocene SST Reconstruction

description: Sea-surface temperature (SST) and sea-surface salinity (SSS) fluctuations in the northeastern Caribbean have been reconstructed through the last 2000 yr using an artificial neural network and d18O analyses of planktonic foraminifera. A warmer period prevailed in the NE Caribbean from AD ~700-950, which may reflect the occurrence of stronger and/or more frequent El Niņo events. A ~2°C cooling of winter SSTs, from AD ~1400 to 1550, coincides with the occurrence of reduced solar output, the Spörer event. Episodes of lower SSSs with marked minima at the onsets of the Dark Ages in Europe (AD ~500-600) and Little Ice Age (AD ~1400) are cyclically recurrent at intervals of 200-400 yr, and coincide with drier periods in Mexico. This may indicate that the tropical Atlantic evaporation-precipitation budget and SSSs are affected by a centennial-scale modulation involving the freshwater export (import) from (into) the Atlantic Ocean. Coeval changes recorded in the deep North Atlantic circulation indicate that low-latitude SSS anomalies may be advected polewards by the North Atlantic current system, thus affecting deep-ocean convection and strength of the thermohaline circulation.
DOI: 10.15468/dl.c6za4y
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Gastropoda)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1980",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 },
 "Geometry POLYGON((-150 -80,-140 -80,-140 -70,-150 -70,-150 -80))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0020857-251009101135966/datasets/export for details.
DOI: 10.25921/htg9-m613
title: NOAA/WDS Paleoclimatology - Cave KNI-51, Western Australia 8,800 Year Stalagmite d18O Data

description: Oxygen isotopic data from a suite of calcite and aragonite stalagmites from cave KNI-51, located in the eastern Kimberley region of tropical Western Australia, represent the first absolute-dated, high-resolution speleothem record of the Holocene Indonesian-Australian summer monsoon (IASM) from the Australian tropics. Stalagmite oxygen isotopic values track monsoon intensity via amount effects in precipitation and reveal a dynamic Holocene IASM which strengthened in the early Holocene, decreased in strength by 4 ka, with a further decrease from 2 to 1 ka, before strengthening again at 1 ka to years to levels similar to those between 4 and 2 ka. The relationships between the KNI-51 IASM reconstruction and those from published speleothem time series from Flores and Borneo, in combination with other data sets, appear largely inconsistent with changes in the position and/or organization of the Intertropical Convergence Zone (ITCZ). Instead, we argue that the El Nino/Southern Oscillation (ENSO) may have played a dominant role in driving IASM variability since at least the middle Holocene. Given the muted modern monsoon rainfall responses to most El Nino events in the Kimberley, an impact of ENSO on regional monsoon precipitation over northwestern Australia would suggest non-stationarity in the long-term relationship between ENSO forcing and IASM rainfall, possibly due to changes in the mean state of the tropical Pacific over the Holocene.
description: Stalagmite oxygen isotope (d18O) data for 18 calcite and aragonite stalagmites collected in Cave KNI-51, tropical Western Australia, providing a paleomonsoon record for the past 8,800 years. Note: d18O values for stalagmite KNI-51-10 have been decreased by 1 per mil. Provided Keywords: stalagmite, oxygen isotope, Australia, monsoon, tropical rain belt.

Data file updated 7/26/2017.  In the data section of the file, ages were corrected for the stable isotope data of stalagmites KNI-51-10, KNI-51-A2-side 1, and KNI-51-A2-side 2.  Stalagmite labels were corrected for stalagmites KNI-51-A2-side 1 and KNI-51-A2-side 2 (previously were mistakenly labelled as KNI-51-A1-side 1 and KNI-51-A1-side 2). In the Chronology section, distances for U-Th dates in stalagmite KNI-51-A2-side 1 and KNI-51-A2-side 2 were corrected, and ages for U-Th dates in stalagmite KNI-51-A2-side 1 and KNI-51-A2-side 2 were corrected.

Additional assigned age corrections were made to this file 7-February-2018.
DOI: 10.25921/hxfd-8233
title: NOAA/WDS Paleoclimatology - Orca Basin, Gulf of Mexico Stable Isotope, Trace Metal and Geochemistry Data with SST and SSS Reconstructions over the last 17 ka

description: We present a new method that quantifies the oxygen isotope geochemistry of Laurentide ice-sheet (LIS) meltwater across the last deglaciation, and reconstruct decadal-scale variations in the δ18O of LIS meltwater entering the Gulf of Mexico between ∼18 and 11 ka. We employ a technique that combines laser ablation ICP-MS (LA-ICP-MS) and oxygen isotope analyses on individual shells of the planktic foraminifer Orbulina universa to quantify the instantaneous δ18Owater value of Mississippi River outflow, which was dominated by meltwater from the LIS. For each individual O. universa shell, we measure Mg/Ca (a proxy for temperature) and Ba/Ca (a proxy for salinity) with LA-ICP-MS, and then analyze the same O. universa for δ18O using the remaining material from the shell. From these proxies, we obtain δ18Owater and salinity estimates for each individual foraminifer. Regressions through data obtained from discrete core intervals yield δ18Ow vs. salinity relationships with a y-intercept that corresponds to the δ18Owater composition of the freshwater end-member. Our data suggest that from 15.5 through 14.6 ka, estimated δ18Ow values of Mississippi River discharge from discrete core intervals range from −11‰ to −21‰ VSMOW, which is consistent with δ18O values from both regional precipitation and the low-elevation, southern margin of the LIS. During the Bølling and Allerød (14.0 through 13.3 ka), estimated δ18Ow values of Mississippi River discharge from discrete core intervals range from −22‰ to −38‰ VSMOW. These values suggest a dynamic melting history of different parts of the LIS, with potential contributions to Mississippi River outflow from both the low-elevation, southern margin of the LIS and high-elevation, high-latitude domes in the LIS interior that were transported to the ablation zone. Prior to ∼15.5 ka, the δ18Owater value of the Mississippi River was similar to that of regional precipitation or low-latitude LIS meltwater, but the Ba concentration in the Mississippi basin was affected by changes in weathering within the watershed, complicating Ba-salinity relationships in the Gulf of Mexico. After 13 ka, our data suggest Mississippi River outflow did not influence surface salinity above our Gulf of Mexico Orca Basin core site. Rather, we hypothesize that open ocean conditions prevailed as sea level rose and the paleoshoreline at the southern edge of North America retreated northward.
description: Data from cores MD02-2550 and MD02-2551.
DOI: 10.25921/hkmx-k527
title: NOAA/WDS Paleoclimatology - Rebecca Lagoon, Tasmania 3,700 Year Sediment Reflectance and Precipitation Reconstruction

description: Accurate projections of future climate changes in regions susceptible to drought depend on a good understanding of past climate changes and the processes driving them. In the absence of longer term instrumental data, paleoclimate data are needed. In this study we develop a precipitation reconstruction for Rebecca Lagoon (41 11'S, 144 41'E), northwest Tasmania. First, the relationship between scanning reflectance spectroscopy measurements of sediment cores in the visible spectrum (380-730 nm) and instrumental precipitation record (1912-2009) was used to develop a model to reconstruct precipitation back in time. Results showed that the ratio of reflectance between 660 and 670 nm (i.e., reflectance at 660 nm/reflectance at 670 nm; a measure of pigment diagenesis) was significantly related to annual precipitation. A calibration model was developed (R = -0.56, pauto < 0.001, RMSEP = 43.0 mm yr- 1, 5 year triangular filtered data, calibration period 1912-2009). Second, this calibration-in-time model was used to reconstruct late Holocene precipitation changes over the last ~ 3000 years. This showed relatively dry conditions from ca. 3100-2800 cal yr BP, wet conditions from ca. 2800-2400 cal yr BP, dry conditions from ca. 2400-2000 calyr BP, and variable conditions after this. Relatively wet conditions occurred from ca. 500 cal yr BP to the late AD 1800 s (ca. 50 cal. yr BP). The precipitation reconstruction indicates that conditions were relatively dry for the 20th century compared to the last ~ 3000 years. In particular, the dry period measured in recent decades is one of the most intense in at least the last 500 years. As precipitation in this region is primarily driven by the Southern Hemisphere westerly winds, these changes are discussed in terms of shifts in westerly wind strength and/or position.
description: Sediment reflectance data from Rebecca Lagoon, Tasmania, cores RL1A and 1B, plus precipitation reconstructions spanning the past 3,700 years. 
      Provided Keywords: Lake sediments; Climate change; Australia; Reflectance spectroscopy; Westerly winds
DOI: 10.25921/hzc6-5g51
title: NOAA/WDS Paleoclimatology - Lomonosovfonna, Svalbard 1,200 Year Ice Core d18O and Temperature Reconstruction

description: Two isotopic ice core records from western Svalbard are calibrated to reconstruct more than 1000 years of past winter surface air temperature variations in Longyearbyen, Svalbard, and Vardø, northern Norway. Analysis of the derived reconstructions suggests that the climate evolution of the last millennium in these study areas comprises three major sub-periods. The cooling stage in Svalbard (ca. 800-1800) is characterized by a progressive winter cooling of approximately 0.9C century-1 (0.3C century-1 for Vardø) and a lack of distinct signs of abrupt climate transitions. This makes it difficult to associate the onset of the Little Ice Age in Svalbard with any particular time period. During the 1800s, which according to our results was the coldest century in Svalbard, the winter cooling associated with the Little Ice Age was on the order of 4C (1.3C for Vardø) compared to the 1900s. The rapid warming that commenced at the beginning of the 20th century was accompanied by a parallel decline in sea-ice extent in the study area. However, both the reconstructed winter temperatures as well as indirect indicators of summer temperatures suggest the Medieval period before the 1200s was at least as warm as at the end of the 1990s in Svalbard.
description: Ice core oxygen isotope (d18O) data and temperature reconstruction for the past 1,200 years from Lomonosovfonna, Svalbard.
DOI: 10.25921/heyh-ky04
title: NOAA/WDS Paleoclimatology - Ganesh, Nepal 200 Year Tree Ring Oxygen Isotope Data

description: We have constructed a regional tree-ring cellulose oxygen isotope (d18O) record for the northern Indian sub-continent based on two new records from northern India and central Nepal and three published records from northwestern India, western Nepal and Bhutan. The record spans the common interval from 1743 to 2008CE. Correlation analysis reveals that the record is significantly and negatively correlated with the three regional climatic indices: all India rainfall (AIR; r = -0.5, p < 0.001, n = 138), Indian monsoon index (IMI; r = -0.45, p < 0.001, n = 51) and the intensity of monsoonal circulation (r = -0.42, p < 0.001, n = 51). The close relationship between tree-ring cellulose d18O and the Indian summer monsoon (ISM) can be explained by oxygen isotope fractionation mechanisms. Our results indicate that the regional tree-ring cellulose d18O record is suitable for reconstructing high-resolution changes in the ISM. The record exhibits significant interannual and long-term variations. Interannual changes are closely related to the El Nino-Southern Oscillation (ENSO), which indicates that the ISM was affected by ENSO in the past. However, the ISM-ENSO relationship was not consistent over time, and it may be partly modulated by Indian Ocean sea surface temperature (SST). Long-term changes in the regional tree-ring d18O record indicate a possible trend of weakened ISM intensity since 1820. Decreasing ISM activity is also observed in various high-resolution ISM records from southwest China and Southeast Asia, and may be the result of reduced land-ocean thermal contrasts since 1820CE.
description: Abies spectabilis tree-ring oxygen isotope (d18O) data from Ganesh, Nepal, for the past 200 years.  IITRDB29
DOI: 10.25921/h1xt-sm23
title: NOAA/WDS Paleoclimatology - Anjohibe Cave, Madagascar 1700 Year Speleothem Stable Isotope Data

description: Paleoclimate studies of tropical rainfall have led to a recognition of a predominant pattern of anti-phase behavior between the Northern and Southern hemispheres at both orbital and millennial timescales. Less certain is how regional tropical rainfall patterns have changed in the late Holocene, under boundary conditions and on timescales which are most relevant to the tropics' response to a warming world. Several high-resolution southern hemisphere rainfall records are at odds with meridional movement of the mean Inter-Tropical Convergence Zone location as the major driver of Holocene tropical rainfall variability, with regional precipitation patterns resembling modern day El-Niño Southern Oscillation end members. To test emerging ideas on sub-millennial tropical rainfall variability, additional records from the southern hemisphere are required. We present a new speleothem d18O record from Anjohibe Cave, northwestern Madagascar, which provides a quasi-annual record of monsoonal strength and precipitation amount for the last 1700 years. The majority of d18O variability in the record is at the decadal scale, and shows little to no correlation with major climate indices or cyclical climate drivers. At lower frequencies, changes in mean speleothem d18O show good correlation with other regional precipitation records both north and south of the equator. The regional coherency of tropical rainfall across the west Indian Ocean resembles expansion and contraction of the tropical rain belt and positive-Indian Ocean Dipole-like conditions at different timescales. The cause of this coherency could be related to symmetrical changes in continental sensible heating, or to a low frequency sea surface temperature climate mode.
description: Speleothem stable isotope (d18O and d13C) data from Anjohibe Cave, Madagascar for the past 1700 years as a record of the Madagascan monsoon.
DOI: 10.25921/hh1d-pc59
title: NOAA/WDS Paleoclimatology - Bigler - Bergün GR Val Tuors - PCAB - ITRDB SWIT186

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 Chronology file added 2018-12-19. NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/h09z-5713
title: NOAA/WDS Paleoclimatology - North Western Mediterranean Sea (Gulf of Lion) Sea Surface Temperature Reconstruction during the Common Era

description: This study investigates the multidecadal-scale variability of sea surface temperatures (SSTs) in the convection region of the Gulf of Lion (NW Mediterranean Sea) over the full past 2000 yr (Common Era) using alkenone biomarkers. Our data show colder SSTs by 1.7°C over most of the first millennium (200 - 800 AD) and by 1.3°C during the Little Ice Age (LIA; 1400-1850 AD) than the 20th century mean (17.9°C). Although on average warmer, those of the Medieval Climate Anomaly (MCA) (1000-1200 AD) were lower by 1°C. We found a mean SST warming of 2°C/100 yr over the last century in close agreement with the 0.22 and 0.26°C/decade values calculated for the western Mediterranean Sea from in situ and satellite data, respectively. Our results also reveal strongly fluctuating SSTs characterized by cold extremes followed by abrupt warming during the LIA. We suggest that the coldest decades of the LIA were likely caused by prevailing negative EA states and associated anticyclone blocking over the North Atlantic resulting in cold continental northeasterly winds to blow over Western Europe and the Mediterranean region.
description: KSGC-31 was 7.01 m long and covered 10000 to -21 calyrBP; Gol-Ho1B was 19 cm long and covered -10 to -62 calyrBP.
      Provided Keywords: Mediterranean Sea, sea surface temperature, alkenones, Common Era, East Atlantic mode, atmospheric blocking
DOI: 10.25921/h6jn-sc76
title: NOAA/WDS Paleoclimatology - Taylor Dome - Carbon Dioxide Data, 20-60 KYrBP

description: A high-resolution record of the atmospheric CO2 concentration from 60 to 20 thousand years before present (kyr BP) based on measurements on the ice core of Taylor Dome, Antarctica is presented. This record shows four distinct peaks of 20 parts per million by volume (ppmv) on a millennial time scale. Good correlation of the CO2 record with temperature reconstructions based on stable isotope measurements on the Vostok ice core (Antarctica) is found.
description: CO2 record from 60 - 20 kyr BP from the Taylor Dome ice core, Antarctica
DOI: 10.25921/hdg0-6933
title: NOAA/WDS Paleoclimatology - Villalba - Castaño Overo 5 - NOPU - ITRDB ARGE105

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 Chronology file added 2018-12-13. NOAA Template Raw Measurements file added 2019-04-29.
DOI: 10.25921/hzny-7z98
title: NOAA/WDS Paleoclimatology - Wahoo Lake, Alaska 11,500 Year Physical Properties and Isotope Data

description: Despite recent progress in understanding high-latitude climate variability, paleoclimate records are scarce from the Alaskan Arctic. We conducted isotopic and sediment analyses at Wahoo Lake to infer Holocene climate variability in northeastern Alaska. Water d18O and dD values from the lake and its inlet/outlet streams suggest that winter precipitation dominates modern water inputs and that evaporation has limited influence on the lake's hydrological budget. The isotopic composition of Pisidium exhibits marked variations during the past 11,500 years, with d18O ranging between -18.7 and -16.2 per mil and d13C between -7.1 and -2.3 per mil (Vienna Pee Dee Belemnite (VPDB)). Elevated d18O and sediment composition from 11.5 to 8.9 kcal. BP suggest evaporative 18O enrichment and arid conditions. Rising lake levels are evidenced by the disappearance of Pisidium and a transition to low-carbonate gyttja ca. 6.3 kcal. BP and by the onset of sediment deposition on an adjacent shelf by 5.3 kcal. BP. These changes coincided with enhanced effective moisture in interior and southern Alaska as inferred from lake-level records and may be related to broad-scale atmospheric circulation changes. In the shelf sediments, carbonate abundance increases markedly at 3.5 kcal. BP, and d18O increases from -18.0 to -16.5 per mil at 2.1 kcal. BP, possibly resulting from increased temperature and/or summer precipitation. After 2.1 kcal. BP, d18O fluctuates with an overall decreasing trend to -17.2 per mil at 0.9 kcal. BP. Late-Holocene variations in our d18O record display coherent patterns with regional glacier fluctuations at centennial to millennial scales, suggesting that d18O minima were related to a combination of low temperatures and enhanced winter snowfall. Holocene variations in organic matter abundance at Wahoo Lake also show broad similarities to total solar irradiance, implying that suborbital solar variability played a role in modulating regional climate and aquatic productivity.
description: Oxygen and carbon isotopes of Pisidium bivalves and lithological composition of sediments from Wahoo Lake, Brooks Foothills, Alaska.
DOI: 10.25921/h8z5-rz75
title: NOAA/WDS Paleoclimatology - Lara fire data from Cordillera Pelada - IMPD CHCOR001

description: Records of past fire occurrence from tree rings, charcoal found in lake sediments, and other proxies. 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.  Additional information on the International Multiproxy Database (IMPD) data set procedures are also available.