cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.29916745.v1
title: Correspondence analysis on sparse bipartite graphs with hyperspecialization

description: Correspondence analysis (CA) and its covariate-based counterpart, canonical correspondence analysis (CCA), are classic yet popular scaling methods in the natural, social, and biomedical sciences to estimate latent gradients that drive the formation of edges in a bipartite graph. However, these methods struggle to identify latent gradients when they exist in sparse graphs where small subsets of nodes are hyperspecialized to each other. This paper proposes a new computational method to prevent hyperspecialized nodes from obscuring latent gradient solutions based on a Markov chain interpretation of the CA eigenvalue problem. This approach identifies small subsets of hyperspecialized nodes with greater precision than traditional graph clustering techniques, and outperforms existing regularization techniques at identifying a latent gradient on a real-world political fundraising network of candidates for U.S. federal office, which spans three decades and includes nearly 20,000 candidates for federal office and 3 million of their donors.
DOI: 10.25921/f238-nk49
title: NOAA/WDS Paleoclimatology - Esper - Erbeskopf - PCAB - ITRDB GERM229

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: Missing rings were inserted with the value 1 NOAA Template Raw Measurements file added 2020-09-03.
DOI: 10.25921/ff15-dx58
title: NOAA/WDS Paleoclimatology - Meile - Sachseln Heitlistock - PCAB - ITRDB SWIT412

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: Reference: 
# Meile C. 2010. Die Auswirkungen der Windexposition und des Temperaturanstiegs auf das Wachstum von Bauminseln an der Waldgrenze. Master thesis. ETH Zurich, Zurich. NOAA Template Raw Measurements file added 2021-05-03.
DOI: 10.25921/fz9n-c897
title: NOAA/WDS Paleoclimatology - Minicoy Island, Lakshadweep, Arabian Sea, 1980-2013 CE, Porites lutea Coral d11B, Sr/Ca, Li/Ca, Mg/Ca, pK*B and pH Data

description: Atmospheric CO2 rise in post-industrial era has resulted in decline in surface ocean pH, commonly known as “ocean acidification (OA)”, which has become a threat to marine calcifiers. Instrumental records of ocean pH and its reconstruction utilising boron isotope (d11B) composition of corals demonstrate a long-term OA trend characterised by large spatio-temporal variability in both Pacific and Atlantic oceans. However, no such record exists to elucidate long-term OA trend of the Indian Ocean. We report the first sub-annually resolved pH record (1990–2013) from the Arabian Sea based on d11B measurements on Porites corals from Lakshadweep coral reefs. This pH record is characterised by large variablity ranging from7.93 to 8.65 with no long-term discernable trend. The long-term declining trend expected from the ~50 ppm increase in atmospheric CO2 during the coral growth interval appears to be obscured by large surface pH variability in the Arabian Sea. Our investigation reveals that physical oceanographic processes e.g. upwelling, downwelling and convective mixing modulated by El Niño–Southern Oscillation (ENSO) largely control surface pH variability and masked expected long-term OA trend resulting from anthropogenic CO2 rise. Combining the model-based predictions of increase in frequency and amplitude of ENSO events in a future warming scenario and the observed ENSO dependency of surface water pH, we predict more frequent and large pH variability (“pH extremes”) in this region. Such pH extremes and their occurrences might be critical for the resilience and adaptability of corals and other calcifiers in Arabian Sea and other similar oceanic settings elsewhere.
description: Boron isotopes, Sr/Ca, Li/Mg, Li/Ca and Mg/Ca data of the Porites lutea corals from the Minicoy Island, Lakshadweep in the south-eastern Arabian Sea. It also includes pK*B and pH estimates. Chronology of the core is based x-ray image and Sr/Ca ratio. For details about the chronology, please refer to the original article.
DOI: 10.25921/ft12-d918
title: NOAA/WDS Paleoclimatology - Rydval - Chopok - PCAB - ITRDB SVK007

description: Extreme tree growth reductions represent events of abrupt forest productivity decline and carbon sequestration reduction. An increase in their magnitude can represent an early warning signal of impending tree mortality. Yet the long-term trends in extreme growth reductions remain largely unknown. We analyzed the trends in the proportion of trees exhibiting extreme growth reductions in two Central-European conifer species - Pinus sylvestris (PISY) and Picea abies (PCAB) - between 1901 and 2018. We used a novel approach for extreme growth reduction quantification by relating their size to their mean recurrence interval. Twenty-eight sites throughout Czechia and Slovakia with 1120 ring width series representing high- and low-elevation forests were inspected for extreme growth reductions with recurrence intervals of 15 and 50 years along with their link to climatic drivers. Our results show the greatest growth reductions at low-elevation PCAB sites, indicating high vulnerability of PCAB to drought. The proportions of trees exhibiting extreme growth reductions increased over time at low-elevation PCAB, decreased recently following an abrupt increase in the 1970-1980s at high-elevation PCAB, and showed nonsignificant trends in high- and low-elevation PISY. Climatic drivers of extreme growth reductions, however, shifted over time for all site categories as the proportion of low-temperature-induced extreme growth reductions declined since the 1990s, whereas events caused by drought consistently increased in frequency during the same period. We observed higher growth volatility at the lower range of distribution compared with the upper range margin of PISY and PCAB. This will undoubtedly considerably impact tree growth and vitality as temperatures and incidence of drought in Central Europe are expected to further increase with ongoing climate change.
description: Extreme growth reductions in Central-European Pinus sylvestris (PISY) and Picea abies (PCAB). NOAA Template Raw Measurements file added 2021-12-29.
DOI: 10.25921/frx0-pg35
title: NOAA/WDS Paleoclimatology - Global Ocean Seafloor Sediment Geochemistry Data during the past 12,000 years

description: Quantitative knowledge about the burial of sedimentary components at the seafloor has wide-ranging implications in ocean science, from global climate to continental weathering. The use of 230Th-normalized fluxes reduces uncertainties that many prior studies faced by accounting for the effects of sediment redistribution by bottom currents and minimizing the impact of age model uncertainty. Here we employ a recently compiled global dataset of 230Th-normalized fluxes with an updated database of seafloor surface sediment composition to derive global maps of the burial flux of calcium carbonate, biogenic opal, total organic carbon (TOC), non-biogenic material, iron, mercury, and excess barium (Ba xs). The spatial patterns of burial of the major components are consistent with prior work, but the new quantitative estimates allow evaluations of global elemental budgets, refining prior assessments. Sedimentary Fe fluxes are largely consistent with the bulk non-biogenic burial flux, except in coastal settings or locations with significant hydrothermal inputs. The fluxes of some commonly used paleo-productivity proxies (TOC, biogenic opal, and Ba xs) do not demonstrate spatially-significant relationships with satellite-based productivity estimates Our new compilation of sedimentary fluxes provides more detailed information on burial fluxes, which should lead to substantial improvements in the understanding of how preservation affects these paleoproxies.
description: About 6% of the data reported here have age constraints. They are presented as a column in the data file. Provided Keywords: Marine sediments, calcium carbonate, biogenic opal, organic carbon, trace elements
DOI: 10.25921/f1c9-z070
title: NOAA/WDS Paleoclimatology - Rao - Terminal Warehouse Building - PIPA - ITRDB NY051

description: The Gilded Age of the late 19th century marked a period of rapid development and urbanization in New York City, U.S. To accommodate the high demand in wood products during that time, the timbers used for development of the city were increasingly sourced from locations distant from the northeastern United States. The Terminal Warehouse in the Chelsea neighborhood of New York City was one of many large buildings erected during this period of city expansion, and is an important symbol of New York City commerce during the late 1800s. To determine the history and provenance of timbers used in the construction of the Terminal Warehouse, we used tree-ring analysis on longleaf pine (Pinus palustris Mill.) joists that were original to the building. The ring-width patterns on the joists crossdated well internally, suggesting a common origin of the sampled lumber. Further, our Terminal Warehouse tree-ring chronology (1512-1891 C.E.) correlated strongly with existing tree-ring chronologies from western/central Georgia and eastern Alabama, indicating that the timbers were extracted from this region of the southeastern United States. The provenancing and dating of the Terminal Warehouse timbers underscores the important role that southern pines played in the expansion and development of New York City during the Gilded Age.
description: Dendroproveance of the 1891 Terminal Warehouse, New York City, reveals that its longleaf pine (Pinus palustris Mill.) construction timbers were likely sourced from Western and Central Georgia and Eastern Alabama in the Southeastern USA. (32.0-34.15N; 82.0-86.0W). Sampled in 2019. NOAA Template Raw Measurements file added 2021-08-05.
DOI: 10.25921/f5de-t013
title: NOAA/WDS Paleoclimatology - Larson - Duquette General Store - QURU - ITRDB MN032

description: Concern exists regarding the decline of Eastern white pine (Pinus strobus L.) in the pine-mixed hardwood forests of the Great Lakes region. Using dendroecological techniques, we reconstructed the disturbance history and successional dynamics of an isolated old-growth white pine-mixed hardwood forest in northeastern Minnesota. The oldest trees in the stand were white pine, but a transition to late-successional species began in the mid-1800s prior to extensive anthropogenic influences in the region. This was facilitated by a change in the dominant disturbance type from fire to a combination of wind throw and white-tailed deer browsing. This transition appears to have occurred under natural conditions and will continue to favor both the establishment and continued dominance of late-successional species. This study highlights the importance of studying the natural range of variability of white pine forests in the Great Lakes region of Minnesota.
description: NOAA Template Raw Measurements file added 2021-08-05.
DOI: 10.25921/f5wh-ks61
title: NOAA/WDS Paleoclimatology - Maxwell - Saunders Woods - QUPA - ITRDB IN045

description: Tree-ring reconstructions of streamflow can provide long-term perspectives of flow variability that may be useful in management strategies for water resources. Relative to other portions of the United States, there is a dearth of tree-ring based streamflow reconstructions in the Midwest. The Wabash River is an important water resource in Indiana and Illinois where many sectors rely on it. Here, to better understand the historic hydroclimate within the Wabash River Basin, we reconstructed June-September streamflow for a tributary of the Wabash River using three statistical approaches: the traditional basin approach, and the recently-developed climate-footprint, and drought-reconstruction approaches. Our reconstructions explained 53-71% of the variance for the common period (1941-1984). We find that in our three reconstructions, there are extreme droughts and pluvials that exceed those during the instrumental period, including a sustained five-decade low-flow event in the early 19th century. Overall, we find that the traditional basin approach produced the most robust model but had the shortest reconstruction length of the three approaches, as it requires the predictor chronologies to be derived from within the basin. Our results indicate that there are merits and drawbacks to each approach with the general pattern of sacrificing variance explained for reconstruction length.
description: Wabash streamflow reconstruction NOAA Template Raw Measurements file added 2021-12-29.
DOI: 10.25921/f588-a893
title: NOAA/WDS Paleoclimatology - Soulé - Catfish Lake - PIPA - ITRDB NC031

description: The impacts of inland flooding caused by tropical cyclones (TCs), including loss of life, infrastructure disruption, and alteration of natural landscapes, have increased over recent decades. While these impacts are well documented, changes in TC precipitation extremes—the proximate cause of such inland flooding—have been more difficult to detect. Here, we present a latewood tree-ring–based record of seasonal (June 1 through October 15) TC precipitation sums (ΣTCP) from the region in North America that receives the most ΣTCP: coastal North and South Carolina. Our 319-y-long ΣTCP reconstruction reveals that ΣTCP extremes (≥0.95 quantile) have increased by 2 to 4 mm/decade since 1700 CE, with most of the increase occurring in the last 60 y. Consistent with the hypothesis that TCs are moving slower under anthropogenic climate change, we show that seasonal ΣTCP along the US East Coast are positively related to seasonal average TC duration and TC translation speed.
description: Reconstructing tropical cyclone precipitation. Data include total ring width, earlywood width, and latewood width. NOAA Template Raw Measurements file added 2021-12-29.
DOI: 10.25921/f8by-h451
title: NOAA/WDS Paleoclimatology - Lake Nalengcuo, China Air Temperature Reconstructions for the Last 18 ka

description: A multi-proxy Lateglacial environmental record is described from Lake Naleng (31.10°N; 99.75°E, 4200 m above sea level), situated on south-eastern Tibetan Plateau to gain deeper insights into the hydrological and palaeoclimate development since 17.7 cal ka BP. Palynological reconstructions of variations in mean annual precipitation (MAP) and temperature (MAT), sedimentological data and sediment chemistry including weathering indicators provide a multi-faceted picture of local and regional environmental changes since the Lateglacial. Principal component analyses of all parameters provide information on interrelationships between each parameters, which help to evaluate their traceability to temperature and precipitation and to estimate their usability as proxy indicators for local and or regional variations. During the Lateglacial from 17.7 to 14.0 cal ka BP Lake Naleng experienced cold and dry climate conditions with low biological productivity and supply of unaltered fine-grained material due to the high supply of glacier milk. During the second half of the Lateglacial, climate conditions changed abruptly: increases in MAT (from -4 to -2.2 °C) and MAP (from 500 mm to 820 mm) between 14.0 and 13.0 cal ka BP indicate a climate amelioration. This time interval can be correlated to the Bølling/Allerød (B/A) warming period in the North Atlantic region and is followed by the Younger Dryas cold reversal indicated by abrupt decreases of MAT (from -2.2 to -5 °C) and MAP (from 820 to 650 mm). The onset of the Holocene at about 11.5 cal ka BP is indicated by rises in reconstructed MAT (from -5 to about -0.3 °C) and MAP (from 600 mm to 950 mm), which led to an increased supply of weathered material and higher biological productivity. Between 5.0 and 3.0 cal ka BP, MAT increases to about 0.2 °C and MAP rises to maximum values of about 1000 mm, followed by slightly decreasing MAT and MAP between 3.0 and 0 cal ka BP. The biogeochemical parameters (total organic carbon (TOC), C/N, δ13Corg) and weathering indicators (e.g. the chemical index of alteration (CIA) and Sr/Ba) are directly (erosion of soils) or indirectly (changing provenance) related to moisture availability on the south-eastern TP and shows matching regional climate oscillations since the Lateglacial. In comparison to other Lateglacial records from the TP, MAP reconstructions from Lake Naleng indicate wetter climate conditions in the south-eastern part of the TP and dryer conditions farther away from moisture sources.
description: This dataset was contributed as part of the Temperature-12k project (https://doi.org/10.25921/4RY2-G808). Data were contributed to the project from the original data generators, who are listed in the Investigator field of this template file. Additional notes regarding the use of these data in the Temperature-12k project can be found in the LiPD file listed as an Online_Resource of this template file. Note added by Temperature-12k authors: Note 14C need to be corrected for reservoir effect.
DOI: 10.15468/dl.zt3wvz
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Monoplacophora)",
 "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((120 -50,130 -50,130 -40,120 -40,120 -50))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0020791-251009101135966/datasets/export for details.
DOI: 10.25921/fhrb-ah34
title: NOAA/WDS Paleoclimatology - Germain - Yosemite Forest Dynamics Plot Living Trees - PILA - ITRDB CA728

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: Pinus lambertiana Douglas tree-ring width data collected in a Yosemite National Park forest dynamics plot. Trees in this collection survived in the six years following the 2013 Rim fire. NOAA Template Raw Measurements file added 2021-10-19.
DOI: 10.25921/f8zv-xw05
title: NOAA/WDS Paleoclimatology - Long Island, Bahamas 1050 Year Coarse Fraction Hurricane Event Data

description: Sedimentary records of past hurricane activity indicate centennial-scale periods over the past millennium with elevated hurricane activity. The search for the underlying mechanism behind these active hurricane periods is confounded by regional variations in their timing. Here, we present a new high resolution paleohurricane record from The Bahamas with a synthesis of published North Atlantic records over the past millennium. We reconstruct hurricane strikes over the past 1050 years in sediment cores from a blue hole on Long Island in The Bahamas. Coarse-grained deposits in these cores date to the close passage of seven hurricanes over the historical interval. We find that the intensity and angle of approach of these historical storms plays an important role in inducing storm surge near the site. Our new record indicates four active hurricane periods on Long Island that conflict with published records on neighboring islands (Andros and Abaco Island). We demonstrate these three islands do not sample the same storms despite their proximity, and we compile these reconstructions together to create the first regional compilation of annually resolved paleohurricane records in The Bahamas. Integrating our Bahamian compilation with compiled records from the U.S. coastline indicates basin-wide increased storminess during the Medieval Warm Period. Afterwards, the hurricane patterns in our Bahamian compilation match those reconstructed along U.S. East Coast but not in the northeastern Gulf of Mexico. This disconnect may result from shifts in local environmental conditions in the North Atlantic or shifts in hurricane populations from straight-moving to recurving storms over the past millennium.
description: Coarse sediment fraction and hurricane event data from Long Island blue hole, Bahamas for the past 1,050 years.
DOI: 10.25921/f2gm-vk74
title: NOAA/WDS Paleoclimatology - Hughes - Red Hill Grove - SEGI - ITRDB CA720

description: The first dendroclimatic reconstruction of May 1 snow water equivalent (SWE) was developed from a Sequoiadendron giganteum regional tree-ring chronology network of 23 sites in central California for the period 90-2012 CE. The reconstruction is based on a significant relationship between May 1 SWE and tree-ring growth and shows climate variability from interannual to intercentennial time scales. A regression-based reconstruction equation explains up to 55% of the variance of SWE for 1940-2012. Split-sample validation supports our use of a reconstruction model based on the full period of reliable observational data (1940-2012). Thresholds for May 1 SWE low (15 percentile) and high (80 percentile) years were selected based on the exploratory scatterplots relationship between observed and reconstructed data for the period 1940-2012. The longest period of consecutive low-SWE years in the reconstruction is 2 years and the frequency of the lowest SWE years is highest during the period 710-809 CE. The longest high-SWE period, defined by consecutive wet years, is 3 years (558-560 CE). SWE and its reconstruction positively correlate with northeastern Pacific sea surface temperatures, the low-frequency variability of which may provide some predictive ability. Ultimately, the instrumental record and reconstruction suggest that unlike other sites in the region, twentieth century SWE variability in these Sequoia groves has remained within historical boundaries and relatively buffered from extremes and severe declines, though this is likely to change in coming decades with potentially negative effects on water availability for these trees.
description: NOAA Template Raw Measurements file added 2021-02-22.