cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/n674-8145
title: NOAA/WDS Paleoclimatology - Dry Tortugas Siderastrea and Montastraea Coral Sr/Ca Data, 1992-2008

description: This study examined the variations in the ratio of strontium-to-calcium (Sr/Ca) for two Atlantic corals (Montastraea faveolata and Siderastrea siderea) from the Dry Tortugas National Park (centered on 24.7°N, 82.8°W) in the Gulf of Mexico. Cores from coral colonies in close proximity (10s of meters) and with the same environmental conditions (i.e., depth and water chemistry) were micro-sampled with approximately monthly resolution and the resulting Sr/Ca variations were calibrated with local sea surface temperature (SST) records. Replication tests for coral Sr/Ca variations found high agreement between intra-colony variations and between individual colonies of S. siderea (a single M. faveolata colony was sampled). Regression analysis of monthly variations in coral Sr/Ca and local SST revealed significant correlation on monthly and inter-annual timescales. Verification of the calibration on different timescales found coral Sr/Ca-SST reconstructions in S. siderea were more accurate than those from M. faveolata, especially on inter-annual timescales. Sr/Ca-SST calibration equations for the two species are significantly different (cf., Sr/Ca = -0.042 SST + 10.070, S. siderea; Sr/Ca = -0.027 SST + 9.893, M. faveolata). Mean linear extension for M. faveolata is approximately twice that of S. siderea (4.63, 4.31, and 8.31 mm year-1, A1, F1, and B3, respectively); however, seasonal Sr/Ca variability in M. faveolata is less than S. siderea (0.323, 0.353, and 0.254 mmol mol-1, A1, F1, and B3, respectively). The reduced slope for M. faveolata is attributed to physical sampling issues associated with complex time-skeletal structure of M. faveolata, i.e., a sampling effect, and not a growth effect since the faster growing M. faveolata has the reduced Sr/Ca variability.
description: The data set contains the ratio of strontium-to-calcium (Sr/Ca) for two Atlantic corals (Montastraea faveolata and Siderastrea siderea) from the Dry Tortugas National Park (centered on 24.7°N, 82.8°W) in the Gulf of Mexico. Samples were extracted from cores along the corallite walls with a computer controlled micro-milling system with approximately monthly resolution. Multiple paths were sampled to assess intracolony variability. The coeval paths were averaged together to produce mean Sr/Ca variations. These variations were calibrated with local sea surface temperature (SST) records from NOAA National Data Buoy Center (NDBC; www.ndbc.noaa.gov) DRYF1, PLSF1, and SANF1 using weighted least squares linear regression. The dataset contains averages of the raw coral Sr/Ca data from multiple paths sampled along the cores, with the number of samples and standard error of the mean reported for each month, along with SST data used for calibration. Pulaski Reef, Dry Tortugas: ~24.7°N, 82.8°W, 3m water depth
DOI: 10.25921/nvsj-k131
title: NOAA/WDS Paleoclimatology - Lago dell'Accesa Italy 11.7-4.6KYr Pollen Climate Reconstructions

description: Despite the high potential of pollen records for climate reconstruction, pollen-climate relationships may be biased due to past and present human activities on the landscape. We use (i) transfer functions based on modern pollen-climate relationships to infer seasonal temperature and summer precipitation for the period 11 500-4500 cal. a BP and (ii) lake-level change records based on different sedimentary proxies in multiple cores that are mainly indicative for summer hydrology at Lago dell'Accesa (central Italy). Quantitative reconstructions indicate lowest summer precipitation during two phases (8500-7700 cal. a BP and after 6000 cal. a BP) and a gradual winter temperature increase from 11 500 to ca. 8000 cal. a BP. Lowest summer precipitation was reconstructed during these phases characterised by vegetation shifts from open forests dominated by summergreen oaks (Quercus) to forests dominated by evergreen oaks (Quercus ilex), which are at present most abundant where summer drought is stronger. Similarly, the lake-level record indicates two long-lasting low summer precipitation phases (8800-7700 and 6400-4400 cal. a BP) that were interrupted by short-term high summer precipitation events. Based on the broad agreement between the pollen-inferred summer precipitation and the low-frequency lake-level changes, we suggest that the duration of the high summer precipitation events may have been too short to maintain drought-sensitive trees, which may have been affected by high mortality rates when summer dry conditions returned. Although past and modern pollen-climate relationships may very likely have been affected by human activities since the Neolithic (i.e. when exploitation of the landscape started), we reject the hypothesis of a significant anthropogenic bias in the pollen-based climate reconstruction. In addition, we suggest that pollen-based and lake-level reconstructions may have different inherent abilities of capturing high- and low-frequency precipitation signals.
description: Pollen-inferred summer precipitation and January temperature 
for Lago dell'Accesa, central Italy.
DOI: 10.25921/n9nw-hy79
title: NOAA/WDS Paleoclimatology - Ortegren - Weymouth Woods - PIPA - ITRDB NC017

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 - PDSI/PHDI analysis. NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/npxe-hf68
title: NOAA/WDS Paleoclimatology - Bunn - Squatters Camp - PCMA - ITRDB CANA302

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/n0x2-2y20
title: NOAA/WDS Paleoclimatology - Boswijk - Sinton Road House - AGAU - ITRDB NEWZ100

description: It is not known how global warming will affect the El Niño/Southern Oscillation (ENSO). The instrumental record is too short to discern centennial-scale trends and modelling results are inconclusive1, 2, 3, 4, 5. Proxy reconstructions indicate that ENSO activity was relatively high during the late twentieth century6, 7, 8, 9, 10, but whether this was unusual in the millennial context remains uncertain. Here we present insights into these issues derived from rings of the kauri tree (Agathis australis), a rare long-lived conifer endemic to the forests of northern New Zealand. Our results indicate that the twentieth century was the most ‘ENSO-active’ century of the past 500 years, but may not be unique in the context of the past 700 years, and that ENSO activity comparable to or elevated above that experienced during the late twentieth century is plausible under warmer-than-present conditions. We also find evidence that there may have been significant changes in the ENSO teleconnection to the New Zealand region during the fourteenth and fifteenth centuries, and of multi-decadal fluctuations in ENSO-related activity building up to the present day. Although these two features may delay the expression of increased ENSO activity in the New Zealand region, our results indicate that New Zealand climate is likely to be more dominated by ENSO-related inter-annual variability as the world continues to warm.
description: NOAA Template Raw Measurements file added 2019-02-01.
DOI: 10.25921/nq1b-6f80
title: NOAA/WDS Paleoclimatology - Bigler - Vals GR Riefawald - PCAB - ITRDB SWIT193

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/nejj-5b37
title: NOAA/WDS Paleoclimatology - Fowler - Cascades - AGAU - ITRDB NEWZ082

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 2019-02-01.
DOI: 10.25921/n0vm-8y09
title: NOAA/WDS Paleoclimatology - Pederson - Greenbrook Sanctuary - CYGL - ITRDB NJ003

description: Six water emergencies have occurred since 1981 for the New York City region (NYC) despite: 1) its perhumid climate, 2) substantial conservation of water since 1979 and 3) meteorological data showing little severe or extreme drought since 1970. We reconstruct 472 years of moisture availability for the NYC watershed to place these emergencies in long-term hydroclimatic context. Using nested reconstruction techniques, 32 tree-ring chronologies comprised of 12 species account for up to 66.2% of the average May-August Palmer Drought Severity Index. Verification statistics indicate good statistical skill from 1531-2003. The use of multiple tree species, including rarely-used species that can sometimes occur on mesic sites like Liriodendron tulipifera, Betula lenta and Carya spp., seems to aid reconstruction skill. Importantly, the reconstruction captures pluvial events in the instrumental record nearly as well as drought events and is significantly correlated to precipitation over much of the northeastern US. While the mid-1960s drought is a severe drought in the context of the new reconstruction, the region experienced repeated droughts of similar intensity, but greater duration during the 16th and 17th centuries. The full record reveals a trend towards more pluvial conditions since ca 1800 that is accentuated by an unprecedented, 43-year pluvial event that continues through 2011. In the context of the current pluvial, decreasing water usage, but increasing extra-urban pressures, it appears that the water supply system for the greater NYC region could be severely stressed if the current water boom shifts towards hydroclimatic regimes like the 16th and 17th centuries.
description: This collection of CAGL raw ring widths was made by N. Pederson in Greenbrook Sanctuary in Tenafly, NJ. These data were collected for a dendroecological study of southern temperate trees growing at or near a northern range margin. They are growing on top of the Palisades along the Hudson River on thin soils and in a fairly dense forest with closed-canopy conditions. Detrending of these raw data should be conducted with closed-canopy or forest interior conditions in mind.
# 
# The raw data in this collection contains values of -8888 for years where the rings were distorted or otherwise not useful for dendroclimatology. The latest version of ARSTAN reads these as dummy variables and can in-fill these gaps. 
#  NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/nas6-vz65
title: NOAA/WDS Paleoclimatology - Bogino - Las Taguas - PROS - ITRDB ARGE112

description: Prosopis caldenia Burkart (caldén) is the most important woody species in the caldenales, the open xerophytic woodlands covering approximately 33 000 km2 in the semiarid central region of Argentina. Dendrochronological techniques were used to estimate mean radial growth and the biological rotation age of P. caldenia in San Luis, Central Argentina. Inter-annual variations in ring widths were measured on cross-sections from dominant and co-dominant trees at four sampling sites from across the natural distribution of P. caldenia in the province of San Luis. For a period of 65 years, the mean cumulative radial growth between these four stands varied from 174.9 to 246.09 mm, whereas the mean annual radial growth ranged from 2.7 to 4.0 mm yr−1. Biological rotation ages were estimated based on the temporal evolution of the annual basal area mean and current increments. At the four stands, the biological rotation age occurs at ages equal to or greater than 66 years. In comparison with the introduced species presently used for commercial reforestation in the region, P. caldenia shows similar rates of radial growth, is better-adapted to the extreme climatic variability of semiarid Central Argentina, and its wood largely exceeds in quality the wood of those species used for commercial reforestation.
description: NOAA Template Raw Measurements file added 2019-04-29.
DOI: 10.25921/ngx4-kp31
title: NOAA/WDS Paleoclimatology - Buckley - TGL Phou Khao Khouay NBCA - PIMK - ITRDB LS002

description: The Asian monsoon system affects more than half of humanity worldwide, yet the dynamical processes that govern its complex spatiotemporal variability are not sufficiently understood to model and predict its behavior, due in part to inadequate long-term climate observations. Here we present the Monsoon Asia Drought Atlas (MADA), a seasonally resolved gridded spatial reconstruction of Asian monsoon drought and pluvials over the past millennium, derived from a network of tree-ring chronologies. MADA provides the spatiotemporal details of known historic monsoon failures and reveals the occurrence, severity, and fingerprint of previously unknown monsoon megadroughts and their close linkages to large-scale patterns of tropical Indo-Pacific sea surface temperatures. MADA thus provides a long-term context for recent monsoon variability that is critically needed for climate modeling, prediction, and attribution.
description: Purpose of Collection:  
# Climatology - precipitation analysis   NOAA Template Raw Measurements file added 2019-04-08. 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/n090-sv72
title: NOAA/WDS Paleoclimatology - Krusic - Xinjiaing BLKC - LASI - ITRDB CHIN031

description: The Asian monsoon system affects more than half of humanity worldwide, yet the dynamical processes that govern its complex spatiotemporal variability are not sufficiently understood to model and predict its behavior, due in part to inadequate long-term climate observations. Here we present the Monsoon Asia Drought Atlas (MADA), a seasonally resolved gridded spatial reconstruction of Asian monsoon drought and pluvials over the past millennium, derived from a network of tree-ring chronologies. MADA provides the spatiotemporal details of known historic monsoon failures and reveals the occurrence, severity, and fingerprint of previously unknown monsoon megadroughts and their close linkages to large-scale patterns of tropical Indo-Pacific sea surface temperatures. MADA thus provides a long-term context for recent monsoon variability that is critically needed for climate modeling, prediction, and attribution.
description: Purpose of Collection:  
# Climatology - precipitation analysis NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.25921/nhwc-hh34
title: NOAA/WDS Paleoclimatology - NGRIP Ice Core 41-34 KYrBP dD(CH4) Data

description: The causes of past changes in the global methane cycle and especially the role of marine methane hydrate (clathrate) destabilization events are a matter of debate. Here we present evidence from the North Greenland Ice Core Project ice core based on the hydrogen isotopic composition of methane [dD(CH4)] that clathrates did not cause atmospheric methane concentration to rise at the onset of Dansgaard-Oeschger (DO) events 7 and 8. Box modeling supports boreal wetland emissions as the most likely explanation for the interstadial increase. Moreover, our data show that dD(CH4) dropped 500 years before the onset of DO 8, with CH4 concentration rising only slightly. This can be explained by an early climate response of boreal wetlands, which carry the strongly depleted isotopic signature of high-latitude precipitation at that time.
description: Deuterium isotope data of methane (dDCH4) from the NGRIP 
ice core, for 41-34 KYrBP.
DOI: 10.25921/nygs-nf63
title: NOAA/WDS Paleoclimatology - Bollmann et al. 2002 Coccolith Abundance and Holocene Paleotemperature

description: A global sea surface temperature calibration based on the relative abundance of different morphotypes within the coccolithophore genus Gephyrocapsa in Holocene deep-sea sediments is presented. There is evidence suggesting that absolute sea surface temperature for a given location can be calculated from the relative abundance of Gephyrocapsa morphotypes in sediment samples, with a standard error comparable to temperature estimates derived from other temperature proxies such as planktic foraminifera transfer functions. A total of 110 Holocene sediment samples were selected from the Pacific, Indian, and Atlantic Oceans covering a mean sea surface temperature gradient from 13.6° to 29.3°C. Standard multiple linear regression analyses were applied to this data set, linking the relative abundance of Gephyrocapsa morphotypes to sea surface temperature. The best model revealed an r2 of 0.83 with a standard residual error of 1.78°C for the estimation of mean sea surface temperature. This new proxy provides a unique opportunity for the reconstruction of paleotemperatures with a very small amount of sample material due to the minute size of coccoliths, permitting examination of thinly laminated sediments (e.g., a pinhead of material from laminated sediments for the reconstruction of annual sea surface temperature variations). Such fine-scale resolution is currently not possible with any other proxy. Application of this new paleotemperature proxy may allow new paleoenvironmental interpretations in the late Quaternary period and discrepancies between the different currently used paleotemperature proxies might be resolved.
DOI: 10.25921/nqvh-fs06
title: NOAA/WDS Paleoclimatology - Cronin et al. 2000 Chesapeake Bay Foraminifera Counts and Paleosalinity Estimates

description: Salinity oscillations caused by multidecadal climatic variability had major impacts on the Chesapeake Bay estuarine ecosystem during the past 1000 yr. Microfossils from sediments dated by radiometry (14C, 137Cs, 210Pb) and pollen stratigraphy indicate that salinity in mesohaline regions oscillated 10–15 ppt during periods of extreme drought (low fresh-water discharge) and wet climate (high discharge). During the past 500 yr, 14 wet-dry cycles occurred, including sixteenth and early seventeenth century megadroughts that exceeded twentieth century droughts in their severity. These droughts correspond to extremely dry climate also recorded in North American tree-ring records and by early colonists. Wet periods occurred every ∼60–70 yr, began abruptly, lasted <20 yr, and had mean annual rainfall ∼25%–30% and fresh-water discharge ∼40%–50% greater than during droughts. A shift toward wetter regional climate occurred in the early nineteenth century, lowering salinity and compounding the effects of agricultural land clearance on bay ecosystems.
DOI: 10.15468/dl.b6uh3b
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "ScientificName is one of (Lithrea brasiliensis, Cinnamodendron dinisii, Ocotea puberula, Matayba elaeagnoides, Zanthoxylum rhoifolium, Ruprechtia laxiflora, Myrsine guianensis, Sapium glandulosum)",
 "HasCoordinate is true",
 "Geometry POLYGON((-51.869970676 -27.531204394, -51.685586408 -27.531204394, -51.685586408 -27.389789005, -51.869970676 -27.389789005, -51.869970676 -27.531204394))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0021174-251009101135966/datasets/export for details.
DOI: 10.25921/nnkz-4898
title: NOAA/WDS Paleoclimatology - Viau et al. 2008 Eastern Beringia 25,000 Year Climate Recons

description: We present new temperature and precipitation reconstructions for the past 25 000 cal. years BP from across eastern Beringia based on a network of pollen diagrams, an updated modern pollen calibration database, and an improved methodology using the modern analogue technique (MAT). Time series show July temperatures were around 4 °C lower during full glacial and January temperatures were about 2 °C lower than present. Annual temperatures rose beginning around 16 000 cal. years BP, reaching a maximum around 12 000 cal. year BP. The warming was more rapid in southern Beringia. Annual precipitation varied by 250 mm during the past 25 000 cal. years BP. Maps of reconstructed precipitation patterns show increasingly drier conditions since 12 000 cal. years BP. that vary regionally, suggesting Holocene atmospheric circulation changes at multiple time and space scales. Orbitally forced seasonality changes during the late glacial and early Holocene resulted in reversed seasonal temperature reconstructions due to methodological constraints using the MAT and (or) non-analogue conditions. The magnitude of millennial-scale climate variability in this region was greater during the last glacial and late glacial periods than during the past 8000 years.
DOI: 10.25921/nkpb-n667
title: NOAA/WDS Paleoclimatology - Ogden - Hidden Valley NZ - AGAU - ITRDB NEWZ083

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 2019-02-01.