cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/mmbg-rr43
title: NOAA/WDS Paleoclimatology - Lake Hakluytvatnet, Svalbard 13,000 Year Leaf Wax Hydrogen Isotope Data

description: The response of the Arctic hydrologic cycle to global warming includes changes in precipitation patterns and moisture availability associated with variable sea ice extent and modes of atmospheric circulation. Reconstructions of past hydroclimate changes help constrain the natural range of these systems, identify the manners in which they respond to different forcing mechanisms, and reveal their connections to other components of the climate system, all of which lead to a better understanding of present and future changes. Here we examine hydroclimate changes during the Holocene in the High Arctic archipelago of Svalbard by reconstructing the isotopic composition of precipitation. We measured the hydrogen isotopic composition (dD values) of leaf wax compounds (n-alkanes; C25-C31) in a sediment core from Lake Hakluytvatnet on the island of Amsterdamoya, northwest Spitsbergen. We interpret dD values of mid-chain (C25) and long-chain (C29, C31) length n-alkanes to represent changes in the isotopic composition of lake water and precipitation over the last 12.9 ka. After deglaciation of the catchment, water supply became restricted and the lake experienced significant evaporative isotopic enrichment indicating warmer conditions from 12.8 to 7.5 ka. The isotope values suggest an increase in the delivery of moisture from warmer sub-polar air masses between 12.8 and 9.5 ka, followed by generally warm, but unstable conditions between 9.5 and 7.5 ka, possibly indicating a response to meltwater forcing. Sedimentary evidence indicates a hiatus in deposition c. 7.5-5.0 ka, likely as a result of desiccation of the lake. At c. 5.0 ka lacustrine sedimentation resumed and over the last 5 ka there was a progressive increase in the influence of polar air masses and colder conditions, which culminated in an abrupt shift to colder conditions at c. 1.8 ka. This late Holocene cooling ended c. 0.18 ka, when isotopic data indicate warmer conditions and greater influence of moisture derived from lower latitudes.
description: Leaf wax hydrogen isotope data from Lake Hakluytvatnet, Svalbard, for the past 13,000 years
DOI: 10.5517/cc8k352
title: CCDC 254763: Experimental Crystal Structure Determination

description: Related Article: B.Modzelewska-Banachiewicz, J.Banachiewicz, A.Chodkowska, E.Jagiello-Wojtowicz, L.Mazur|2004|Eur.J.Med.Chem.|39|873|doi:10.1016/j.ejmech.2004.07.002
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.15468/dl.r7bpsf
title: Occurrence Download

description: A dataset containing 1725 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Nypa fruticans"
 ]
}

 The dataset includes 1725 records from 82 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0021154-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/mtf7-e119
title: NOAA/WDS Paleoclimatology - Babushkina - Kazanovka - PISY - ITRDB RUSS305

description: Tree rings from forest-steppes of temperate continental Asia are useful proxies for the moisture regime reconstructions, encompassing environmental variations such as warming climate, changing frequency and intensity of droughts. Heterogeneity of precipitation leaves open the question of the probability of spatially large-scale droughts in this macro-region. Theoretically, such events could be driven by global tele-connections and/or common astronomic cycles. We have attempted the precipitation reconstructions of two distant (~1000 km) intermountain valleys in South Siberia, based on the tree ring width of Pinus sylvestris L. To enhance the quality of the precipitation reconstruction models, networks of existing tree-ring data were expanded and daily precision of instrumental precipitation series was implemented for calibration. Within-region (150–200 km) common signal between local chronologies r = 0.37–0.90 (p < 0.05) allowed obtaining regional ones, registering precipitation up to annual temporal scale. High correlations of both regional chronologies with annual precipitation were found for period from previous July 22 to current July 21 (r = 0.71–0.72). These precipitation series were further reconstructed. Reconstruction models explaining 50–52% of variation were developed for the years 1753–2015 and 1798–2015. Although both valleys do not record many concurrent extreme precipitation events, some common and opposite extremes have been revealed. For both regions, an 11-year and 26–29-year cycles were commonly observed. These were probably associated with the solar activity and Pacific Decadal Oscillation (PDO). However, phase shifts of these cycles were recorded between the regions and with PDO. Stronger impact of oceanic air masses was observed in the eastern one of the two considered territories. Whereas higher significance of frequencies associated with astronomic cycles (solar and lunar-nodal) was found in the western one.
description: moisture-limited habitat; Kazanovka village NOAA Template Raw Measurements file added 2022-04-04.
DOI: 10.5517/cc646l3
title: CCDC 182794: Experimental Crystal Structure Determination

description: Related Article: M.Ranjbar, M.Abdollahi, M.Rafizadeh|2004|Anal.Sci.:X-Ray Struct.Anal.Online|20|x133|doi:10.2116/analscix.20.x133
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/cc891j3
title: CCDC 247024: Experimental Crystal Structure Determination

description: Related Article: A.Shaabani, M.B.Teimouri, S.Arab-Ameri|2004|Tetrahedron Lett.|45|8409|doi:10.1016/j.tetlet.2004.09.039
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.25921/m2k6-4h92
title: NOAA/WDS Paleoclimatology - Andreev - Shinestuy - PISY - ITRDB RUSS310

description: Tree rings from forest-steppes of temperate continental Asia are useful proxies for the moisture regime reconstructions, encompassing environmental variations such as warming climate, changing frequency and intensity of droughts. Heterogeneity of precipitation leaves open the question of the probability of spatially large-scale droughts in this macro-region. Theoretically, such events could be driven by global tele-connections and/or common astronomic cycles. We have attempted the precipitation reconstructions of two distant (~1000 km) intermountain valleys in South Siberia, based on the tree ring width of Pinus sylvestris L. To enhance the quality of the precipitation reconstruction models, networks of existing tree-ring data were expanded and daily precision of instrumental precipitation series was implemented for calibration. Within-region (150–200 km) common signal between local chronologies r = 0.37–0.90 (p < 0.05) allowed obtaining regional ones, registering precipitation up to annual temporal scale. High correlations of both regional chronologies with annual precipitation were found for period from previous July 22 to current July 21 (r = 0.71–0.72). These precipitation series were further reconstructed. Reconstruction models explaining 50–52% of variation were developed for the years 1753–2015 and 1798–2015. Although both valleys do not record many concurrent extreme precipitation events, some common and opposite extremes have been revealed. For both regions, an 11-year and 26–29-year cycles were commonly observed. These were probably associated with the solar activity and Pacific Decadal Oscillation (PDO). However, phase shifts of these cycles were recorded between the regions and with PDO. Stronger impact of oceanic air masses was observed in the eastern one of the two considered territories. Whereas higher significance of frequencies associated with astronomic cycles (solar and lunar-nodal) was found in the western one.
description: moisture-limited habitat; Vegetation Reconstruction; Shinestuy village NOAA Template Raw Measurements file added 2022-04-04.
DOI: 10.5517/cc7n3rq
title: CCDC 227873: Experimental Crystal Structure Determination

description: Related Article: M.Ranjbar|2004|Anal.Sci.:X-Ray Struct.Anal.Online|20|x135|doi:10.2116/analscix.20.x135
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.25921/mz0n-ff11
title: NOAA/WDS Paleoclimatology - Andreev - Zaigraevo - PISY - ITRDB RUSS313

description: Tree rings from forest-steppes of temperate continental Asia are useful proxies for the moisture regime reconstructions, encompassing environmental variations such as warming climate, changing frequency and intensity of droughts. Heterogeneity of precipitation leaves open the question of the probability of spatially large-scale droughts in this macro-region. Theoretically, such events could be driven by global tele-connections and/or common astronomic cycles. We have attempted the precipitation reconstructions of two distant (~1000 km) intermountain valleys in South Siberia, based on the tree ring width of Pinus sylvestris L. To enhance the quality of the precipitation reconstruction models, networks of existing tree-ring data were expanded and daily precision of instrumental precipitation series was implemented for calibration. Within-region (150–200 km) common signal between local chronologies r = 0.37–0.90 (p < 0.05) allowed obtaining regional ones, registering precipitation up to annual temporal scale. High correlations of both regional chronologies with annual precipitation were found for period from previous July 22 to current July 21 (r = 0.71–0.72). These precipitation series were further reconstructed. Reconstruction models explaining 50–52% of variation were developed for the years 1753–2015 and 1798–2015. Although both valleys do not record many concurrent extreme precipitation events, some common and opposite extremes have been revealed. For both regions, an 11-year and 26–29-year cycles were commonly observed. These were probably associated with the solar activity and Pacific Decadal Oscillation (PDO). However, phase shifts of these cycles were recorded between the regions and with PDO. Stronger impact of oceanic air masses was observed in the eastern one of the two considered territories. Whereas higher significance of frequencies associated with astronomic cycles (solar and lunar-nodal) was found in the western one.
description: moisture-limited habitat; Vegetation Reconstruction; Zaigraevo village NOAA Template Raw Measurements file added 2022-04-04.
DOI: 10.5517/cc7vjbx
title: CCDC 234029: Experimental Crystal Structure Determination

description: Related Article: T.V.Beryozkina, N.N.Kolos, V.D.Orlov, R.I.Zubatyuk, O.V.Shishkin|2004|Phosphorus,Sulfur,Silicon,Relat.Elem.|179|2153|doi:10.1080/10426500490475166
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.25921/mt84-xq76
title: NOAA/WDS Paleoclimatology - Solomina - Bolshoe Krasnoye Lake - B72E - PCAB - ITRDB RUS320

description: The data set presented represents 15 years of collection. It contains tree-ring width measurements from 64 sites of living trees and ten historical chronologies based on archaeological and construction wood up to year 572 CE, altogether 2909 tree-ring series and more than 450000 measured and cross-dated tree rings. It covers the vast territory of European Russia, including its forested northern and central parts, and the Northern Caucasus mountains. The potential use of these data include climatic reconstructions of regional and hemispheric scale, dendrochronological dating of historical and cultural wood, ecological and remote sensing studies.
description: Site information: near eastern part of the Krasnoye lake, 10-20 degree slope, spruce forest with aspen (green moss, firn, blueberry) NOAA Template Raw Measurements file added 2022-05-31.
DOI: 10.5517/cc7z5y9
title: CCDC 237551: Experimental Crystal Structure Determination

description: Related Article: V.Balamurugan, W.Jacob, J.Mukherjee, R.Mukherjee|2004|CrystEngComm|6|396|doi:10.1039/b406744b
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.25921/mbbh-q793
title: NOAA/WDS Paleoclimatology - O'Connor fire data from Pinalenos_H16, Southeast Arizona - IMPD USH16001

description: In recent decades fire size and severity have been increasing in high elevation forests of the American Southwest. Ecological outcomes of these increases are difficult to gauge without an historical context for the role of fire in these systems prior to interruption by Euro-American land uses. Across the gradient of forest types in the Pinaleño Mountains, a Sky Island system in southeast Arizona that experienced two relatively large high-severity fires in the last two decades, we compared fire characteristics and climate associations before and after the onset of fire exclusion to determine the degree of similarity between past and recent fires. We use a gridded fire scar and demography sampling network to reconstruct spatially explicit estimates of fire extent and burn severity, as well as climate associations of fires from individual site to landscape scales from 1640 to 2008 C.E. We found that patterns of fire frequency, size, and severity were relatively stable for at least several centuries prior to 1880. A combination of livestock grazing and active fire suppression after circa 1880 led to (1) a significant reduction in fire spread but not fire ignition, (2) a conversion of more than 80% of the landscape from a frequent, low to mixed-severity fire regime to an infrequent mixed to high-severity fire regime, and (3) an increase in fuel continuity within a mid-elevation zone of dry mixed-conifer forest, resulting in increased opportunities for surface and crown fire spread into higher elevation mesic forests. The two most recent fires affecting mesic forests were associated with drought and temperature conditions that were not exceptional in the historical record but that resulted in a relative proportion of high burn severity up to four times that of previous large fires. The ecological effects of these recent fires appear to be more severe than any fire in the reconstructed period, casting uncertainty upon the recovery of historical species composition in high-severity burn patches. Significant changes to the spatial pattern, frequency, and climate associations of spreading fires after 1880 suggest that limits to fuel loading and fuel connectivity sustained by frequent fire have been removed. Coinciding factors of high fuel continuity and fuel loading, projected lengthening of the fire season, and increased variability in seasonal precipitation suggest that large high-severity fires, especially in mixed-conifer forests, will become the predominant fire type without aggressive actions to reduce fuel continuity and restore fire-resilient forest structure and species composition.
description: This dataset was contributed as part of the North American Tree-ring Fire Scar Synthesis (NAFSS) project (https://www.ncei.noaa.gov/access/paleo-search/study/34853). Data were contributed to the project from the original data generators.
DOI: 10.5517/cc7hdz2
title: CCDC 223354: Experimental Crystal Structure Determination

description: Related Article: Guotao Li, Hongyun Fang, Shiwei Zhang, Zhenfeng Xi|2004|Tetrahedron Lett.|45|8399|doi:10.1016/j.tetlet.2004.09.089
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/cc7z60d
title: CCDC 237553: Experimental Crystal Structure Determination

description: Related Article: V.Balamurugan, W.Jacob, J.Mukherjee, R.Mukherjee|2004|CrystEngComm|6|396|doi:10.1039/b406744b
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/cc88hdd
title: CCDC 246493: Experimental Crystal Structure Determination

description: Related Article: Kok-Ping Chan, Teck-Peng Loh|2004|Tetrahedron Lett.|45|8387|doi:10.1016/j.tetlet.2004.09.049
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.25921/mxm5-sm28
title: NOAA/WDS Paleoclimatology - Andaman Sea U1448 Vegetation Proxies Leaf Wax Carbon Isotopes and Alkane Chain Length during the Last 640 kyr

description: Recent research has found that the subsiding Sunda Shelf (Southeast Asia) was permanently exposed prior to ca. 400 ka with initial submersion-exposure cyclicity, associated with interglacial-glacial sea-level cycles, beginning between 400 and 240 ka. We analyzed the impact submersion-exposure cycles on regional environment and climate through a 640 k.y. leaf-wax carbon isotope (δ13Cwax) reconstruction at Andaman Sea Site U1448, representing relative changes in C3/C4 plant abundances. Prior to ca. 250 ka, the Sunda region was inhabited by a stable C3 (forest) biome, after which submersion-exposure cycles initiated with the deglacial sea-level rise at ca. 250 ka. During subsequent glacial-age sea-level drops, the newly exposed shelf was rapidly colonized by C4 grasses, followed by slow transitions back to C3 forests, representing a tenfold increase in the variability of C3/C4 vegetation in the Sunda region. The C3/C4 regime shift since 250 ka is coherent across the Southeast (SE) Asia peninsula and Sunda Shelf and is coincident with a shift in the east-west sea-surface temperature gradient in the equatorial Pacific Ocean. We hypothesize that the expansion of C4 grasslands promoted and sustained drier glacial-age climates over SE Asia via a feedback mechanism that contributed to weakening the ascending branch of the east-west atmospheric circulation in the equatorial Pacific region known as the Walker Circulation.
description: Provided keywords: Paleoclimatology, leaf wax, carbon isotopes, vegetation proxies, Southeast Asia
DOI: 10.5517/cc7qhq4
title: CCDC 230166: Experimental Crystal Structure Determination

description: Related Article: V.Chan, Jeung Gon Kim, C.Jimeno, P.J.Carroll, P.J.Walsh|2004|Org.Lett.|6|2051|doi:10.1021/ol0492952
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/cc83d6y
title: CCDC 241589: Experimental Crystal Structure Determination

description: Related Article: J.G.Diaz, J.G.Sazatornil, M.L.Rodriguez, L.R.Mesia, G.V.Arana|2004|J.Nat.Prod.|67|1667|doi:10.1021/np040053k
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.25921/mnxt-2785
title: NOAA/WDS Paleoclimatology - Hartl - Nationalpark Kalkalpen, Zöbelboden Nord - FASY - ITRDB AUT145

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
DOI: 10.5517/cc781tb
title: CCDC 216281: Experimental Crystal Structure Determination

description: Related Article: K.Yoganathan, C.Rossant, R.P.Glover, Shugeng Cao, J.J.Vittal, Siewbee Ng, Yicun Huang, A.D.Buss, M.S.Butler|2004|J.Nat.Prod.|67|1681|doi:10.1021/np049844c
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/cc7zslk
title: CCDC 238129: Experimental Crystal Structure Determination

description: Related Article: A.A.Ahmed, S.A.El-Moghazy, M.A.El-Shanawany, H.F.Abdel-Ghani, J.Karchesy, G.Sturtz, K.Dalley, P.W.Pare|2004|J.Nat.Prod.|67|1705|doi:10.1021/np049954j
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.