cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/wp5t-hm56
title: NOAA/WDS Paleoclimatology - Global Seawater Sr/Ca from 2013-2021 CE

description: A 4-year time-series of surface seawater Sr/Ca ratios was assembled across a section of the Florida Keys Reef Tract, in order to uncover any variability that might explain previously reported anomalies in regional calibrations of the coral aragonite Sr/Ca paleotemperature proxy. Samples were collected semiannually on a grid of 54 sites, from September of 2016 until January of 2020. The 325-km2 grid extended from the ocean shore to the forereef wall and from the east end of Long Key to the west end of Marathon. A novel ICP-AES method was used to measure the Sr/Ca ratio, with ratio calibration and normalization against an in-house seawater reference, yielding a long-term precision of better than 0.2%. Significant variations (2%–3%) of the seawater Sr/Ca ratio were found. While it was relatively constant offshore, near the coast the ratio alternated seasonally between higher and lower values, generally resulting in seaward Sr/Ca gradients that were markedly negative in summer but reversed in winter. Inshore seawater Sr/Ca ratios ranged from a summer high of 8.83 mmol/mol to a winter low of 8.54 mmol/mol, the difference corresponding to a potential bias of ∼5.5°C in terms of the coral Sr/Ca paleotemperature proxy. This seasonal variation should diminish the slope of empirical Sr/Ca–SST calibration lines, as has indeed been observed in prior studies with local coral species. Open ocean samples obtained from the Atlantic, Indian, and Pacific enlarge the published Sr/Ca data set for surface seawater and show a much smaller variability of 8.646 ± 0.018 mmol/mol (0.2%).
description: Seawater Sr/Ca to complement coral-based paleoclimate efforts. Seawater samples are collected by hand from the surface and at the bottom by diver in the winter and summer in the Florida Keys.  The study spanned 2016-2020 in the Middle Florida Keys with the grid extending from shore to the forereef area about 6km offshore, along about 11km of coastline. Samples of opportunity from a variety of locations in the Pacific, Indian and Atlantic Oceans were also included. Provided Keywords: strontium, trace element, seawater chemistry
DOI: 10.5517/cc9szjk
title: CCDC 292129: Experimental Crystal Structure Determination

description: Related Article: M.E.G.Skinner, T.Toupance, D.A.Cowhig, B.R.Tyrrell, P.Mountford|2005|Organometallics|24|5586|doi:10.1021/om0506365
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/wasd-k028
title: NOAA/WDS Paleoclimatology - Talisman Cave, Kyrgyzstan Stable Isotope, Sr/Ca and Drought Index Data over the past 7.8 ka

description: Central Asia (CA) is one of the world’s most significant arid regions, which is markedly impacted by global warming. A better understanding of the dynamical processes governing its Holocene climate variability is critical for a better understanding of possible future impacts of climate change in the region. To date, most of the existing CA paleoclimate records are from the summer precipitation–dominated eastern CA (ECA), with few records from the winter precipitation–dominated western CA (WCA). Here, we present a precisely dated (~6‰) and highly resolved (<4-y) record of hydroclimatic variations from the WCA covering the period between 7,774 and 656 y BP. Utilizing multiple proxies (d18O, d13C, and Sr/Ca) derived from a stalagmite from the Fergana Valley, Kyrgyzstan, we reveal a long-term drying trend in WCA, which is in contrast with the wetting trend in ECA. We propose that different responses of winter and summer westerly jets to seasonal solar insolation over the past 8,000 y may have resulted in an antiphased precipitation relationship between the WCA and ECA. Our data contain dominant quasiperiodicities of 1,400, 50 to 70, and 20 to 30 y, indicating close connections between the WCA climate and the North Atlantic. We further identified a series of droughts and pluvials on centennial-to-decadal timescales, which may have influenced regional societies and trans-Eurasian culture exchanges during historical and prehistorical times.
description: Provided Keywords: Westerlies, Stalagmite, Holocene, Winter Insolation, Central Asia
DOI: 10.5517/cc9szkl
title: CCDC 292130: Experimental Crystal Structure Determination

description: Related Article: M.E.G.Skinner, T.Toupance, D.A.Cowhig, B.R.Tyrrell, P.Mountford|2005|Organometallics|24|5586|doi:10.1021/om0506365
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/wah5-0970
title: NOAA/WDS Paleoclimatology - Farris fire data from Mica Mountain - IMPD US02_017

description: Fire scars are used widely to reconstruct historical fire regime parameters in forests around the world. Because fire scars provide incomplete records of past fire occurrence at discrete points in space, inferences must be made to reconstruct fire frequency and extent across landscapes using spatial networks of fire-scar samples. Assessing the relative accuracy of fire-scar fire history reconstructions has been hampered due to a lack of empirical comparisons with independent fire history data sources. We carried out such a comparison in a 2780-ha ponderosa pine forest on Mica Mountain in southern Arizona (USA) for the time period 1937–2000. Using documentary records of fire perimeter maps and ignition locations, we compared reconstructions of key spatial and temporal fire regime parameters developed from documentary fire maps and independently collected fire-scar data (n = 60 plots). We found that fire-scar data provided spatially representative and complete inventories of all major fire years (>100 ha) in the study area but failed to detect most small fires. There was a strong linear relationship between the percentage of samples recording fire scars in a given year (i.e., fire-scar synchrony) and total area burned for that year (y = 0.0003x + 0.0087, r2 = 0.96). There was also strong spatial coherence between cumulative fire frequency maps interpolated from fire-scar data and ground-mapped fire perimeters. Widely reported fire frequency summary statistics varied little between fire history data sets: fire-scar natural fire rotations (NFR) differed by <3 yr from documentary records (29.6 yr); mean fire return intervals (MFI) for large-fire years (i.e., ≥25% of study area burned) were identical between data sets (25.5 yr); fire-scar MFIs for all fire years differed by 1.2 yr from documentary records. The known seasonal timing of past fires based on documentary records was furthermore reconstructed accurately by observing intra-annual ring position of fire scars and using knowledge of tree-ring growth phenology in the Southwest. Our results demonstrate clearly that representative landscape-scale fire histories can be reconstructed accurately from spatially distributed fire-scar samples.
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.

Sample Storage Location: Laboratory of Tree-Ring, University of Arizona
Dating Method: Dated
Related ITRDB_Chronology: Not Applicable

Fire scar data from this site are available in FHX2 format at:
  https://www.ncei.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/us02_017.fhx
along with associated metadata at:
  https://www.ncei.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/us02_017-noaa.txt
DOI: 10.5517/cc9szlm
title: CCDC 292131: Experimental Crystal Structure Determination

description: Related Article: M.E.G.Skinner, T.Toupance, D.A.Cowhig, B.R.Tyrrell, P.Mountford|2005|Organometallics|24|5586|doi:10.1021/om0506365
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/cc9szmn
title: CCDC 292132: Experimental Crystal Structure Determination

description: Related Article: M.E.G.Skinner, T.Toupance, D.A.Cowhig, B.R.Tyrrell, P.Mountford|2005|Organometallics|24|5586|doi:10.1021/om0506365
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/cc9sznp
title: CCDC 292133: Experimental Crystal Structure Determination

description: Related Article: M.E.G.Skinner, T.Toupance, D.A.Cowhig, B.R.Tyrrell, P.Mountford|2005|Organometallics|24|5586|doi:10.1021/om0506365
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/wwd6-rt20
title: NOAA/WDS Paleoclimatology - Jamari National Forest, Brazil Cedro rosa Calcium, Sulfur and d18O Data from 1832-2018 CE

description: The analysis of climate variability and development of reconstructions based on tree-ring characteristics in tropical forests have been increasing in recent decades. In the Amazon region, ring width and stable isotope long-term chronologies have been used for climatic studies, however little is known about the potentiality of wood traits such as density and chemical concentrations. In this study, we used well-dated rings of Cedrela fissilis Vell. from the drought-prone southern Amazon basin to assess the potential of using inter-annual variations of annually-resolved ring width, wood density, stable Oxygen isotope (d18OTR) measured in tree-ring cellulose and concentration of Sulfur (STR) and Calcium (CaTR) in xylem cells to study climate variability. During wet years, Cedrela fissilis produced wider and denser rings with higher CaTR and lower STR, as well as depleted d18OTR values. During dry years, a wider range of responses was observed in growth, density and STR, while lower CaTR and enriched d18OTR values were found. The annual centennial chronologies (1835-2018) showed good skills to calibrate models for reconstructions of local precipitation, evapotranspiration (P-PET), Amazon-wide rainfall and climate modes related to sea surface temperature (SST) anomalies such as El Niño South Oscillation (ENSO), Tropical Northern Atlantic (TNA), and the Western Hemisphere Warm Pool (WHWP) oscillations. CaTR explained 42 % of the total variance of local precipitation (1975-2018), RW explained 30 % of the P-PET variance (1975-2018), while d18OTR explained 60 % and 57 % of the variance of Amazon rainfall (1960-2018) and El Niño 3.4 (1920-2018), respectively. Our results show that a multi-proxy tropical tree-ring approach can be used for high-reliable reconstructions of atmospheric and hydroclimatic variability over Amazon basin at inter-annual and multidecadal time scales.
DOI: 10.5517/cc9szpq
title: CCDC 292134: Experimental Crystal Structure Determination

description: Related Article: M.E.G.Skinner, T.Toupance, D.A.Cowhig, B.R.Tyrrell, P.Mountford|2005|Organometallics|24|5586|doi:10.1021/om0506365
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/cc9t18d
title: CCDC 292183: Experimental Crystal Structure Determination

description: Related Article: C.S.Weinert, P.E.Fanwick, I.P.Rothwell|2005|Organometallics|24|5759|doi:10.1021/om050633s
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/w67b-f515
title: NOAA/WDS Paleoclimatology - Western Pacific Ocean Coral Growth Rate, d18O, d14C, and Sr/Ca Data from 1945 to 2002 CE

description: The isotopic and elemental composition of sclerosponge skeletons are used to reconstruct paleoceanographic records.  Yet few studies have systematically examined the natural variability in sclerosponge skeletal d18O, growth, and Sr/Ca, and how that may influence the interpretation of sclerosponge proxy records.  Here, we analyzed short records in seven specimens of Acanthocheatetes wellsi (high-Mg calcite, 21 mol% Mg) from Palau, four A. wellsi (high-Mg calcite, 21 mol% Mg) from Saipan, and three Astroclera willeyana (aragonite) sclerosponges from Saipan, as well as one long record in an A. wellsi specimen from Palau spanning 1945-2001.5.  In Saipan, species-specific and mineralogical effects appear to have a negligible effect on sclerosponge d18O, facilitating the direct comparison of d18O records between species at a given location.  At both sites, A. wellsi d18O and growth rates were sensitive to environmental conditions, while Sr/Ca was not.  High-resolution d18O analyses confirmed this finding as both A. wellsi and A. willeyana deposited their skeleton following the trends in isotopic equilibrium with seawater, though with a 0.27 pdf mil offset in the case of A. willeyana.  In the high Mg-calcite species A. wellsi, Mg may be interfering with Sr incorporation into the skeleton.  On multi-decadal timescales, A. wellsi sclerosponge d18O in Palau tracked the Southern Oscillation Index variability post-1977, but not pre-1977, coincident with the switch in the Pacific Decadal Oscillation (PDO) ~1976.   This suggests that water mass circulation in the region is influenced by ENSO variability during positive PDO phases, but not during negative ones.
description: Provided Keywords: sclerosponge, oxygen isotopes, paleoceanography, d18O, d14C
DOI: 10.5517/cc8bhdg
title: CCDC 248415: Experimental Crystal Structure Determination

description: Related Article: D.J.Jones, V.C.Gibson, S.M.Green, P.J.Maddox, A.J.P.White, D.J.Williams|2005|J.Am.Chem.Soc.|127|11037|doi:10.1021/ja0518171
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/wjge-tf71
title: NOAA/WDS Paleoclimatology - Mašek - 30PL Šumava - PCAB - ITRDB CZE063

description: Inter-annual climatically driven growth variability of above-ground biomass compartments (for example, tree stems and foliage) controls the intensity of carbon sequestration into forest ecosystems. However, understanding the differences between the climatic response of stem and foliage at the landscape level is limited. In this study, we examined the climate-growth response of stem and leaf biomass and their relationship for Pinus sylvestris (PISY) and Picea abies (PCAB) in topographically complex landscapes. We used tree-ring width chronologies and time series of the normalized difference vegetation index (NDVI) derived from high-resolution Landsat scenes as proxies for stem and leaf biomass, respectively. We then compared growth variability and climate-growth relationships of both biomass proxies between topographical categories. Our results show that the responses of tree rings to climate differ significantly from those found in NDVI, with the stronger climatic signal observed in tree rings. Topography had distinct but species-specific effects: At moisture-limited PISY stands, stem biomass (tree rings) was strongly topographically driven, and leaf biomass (NDVI) was relatively insensitive to topographic variability. In landscapes close to the climatic optimum of PCAB, the relationship between stem and leaf biomass was weak, and their correlations with climate were often inverse, with no significant effects of topography. Different climatic signals from NDVI and tree rings suggest that the response of canopy and stem growth to climate change might be decoupled. Furthermore, our results hint toward different prioritizations of biomass allocation in trees under stressful conditions which might change allometric relationships between individual tree compartments in the long term.
DOI: 10.5517/cc8bhfh
title: CCDC 248416: Experimental Crystal Structure Determination

description: Related Article: D.J.Jones, V.C.Gibson, S.M.Green, P.J.Maddox, A.J.P.White, D.J.Williams|2005|J.Am.Chem.Soc.|127|11037|doi:10.1021/ja0518171
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/w0yn-4234
title: NOAA/WDS Paleoclimatology - Nusa Penida Coral Sr/Ca and d18O Data from 1962–2012

description: Coral geochemical tracers have been used in studies of the paleoclimatology and paleoceanography of the tropics and subtropics. We measured Sr/Ca and oxygen isotope ratios (d18O) in a coral sample collected from the southern part of Lombok Strait, a significant outlet of the Indonesian Throughflow (ITF) to the Indian Ocean, to reconstruct the historical record of sea surface temperature (SST) and seawater d18O. Seawater d18O can be used to approximate sea surface salinity (SSS) because it reflects the balance of evaporation and precipitation. The resulting time series reconstructed SST and SSS, covering the period 1962–2012, shows no clear trend of global warming, although the record induces a large cooling event (~4°C) during 1996–1997. Although neither SST nor SSS shows a systematic relationship with El Niño-Southern Oscillation and Indian Ocean Dipole (IOD), weak but significant correlations are found partly. In addition, the coral data show signals of major IOD and El Niño events in 1994 and 1997, respectively, although climatic trends recorded in the coral are not consistent with those found along the Java-Sumatra coast. To evaluate other influences on the ITF in Lombok Strait, we compared our coral record with coral records from sites in the Java Sea, the southern part of Makassar Strait, and Ombai Strait. During the northwest monsoon (December–January–February), variations in SST and SSS at Lombok Strait site are similar to those at the Java Sea and southern Makassar sites for the period 1962–1995, which suggests that low-salinity water from the Java Sea is carried at least to the southern part of Makassar Strait where it suppresses the ITF upstream from Lombok Strait. However, the SST and SSS records differ at the three sites during the southeast monsoon (June–July–August), indicating that surface conditions in Lombok Strait vary separately from those in the Java Sea. In the longer term, although global warming has been widely identified in the Indonesian Seas, the coral record shows no clear warming trend in the southern part of Lombok Strait, where fluctuations in the ITF may be modulating the distribution of heat in the surface waters of the western Pacific and eastern Indian Ocean.
DOI: 10.5517/cc8bhgj
title: CCDC 248417: Experimental Crystal Structure Determination

description: Related Article: D.J.Jones, V.C.Gibson, S.M.Green, P.J.Maddox, A.J.P.White, D.J.Williams|2005|J.Am.Chem.Soc.|127|11037|doi:10.1021/ja0518171
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/cc8bhhk
title: CCDC 248418: Experimental Crystal Structure Determination

description: Related Article: D.J.Jones, V.C.Gibson, S.M.Green, P.J.Maddox, A.J.P.White, D.J.Williams|2005|J.Am.Chem.Soc.|127|11037|doi:10.1021/ja0518171
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/wkaw-as34
title: NOAA/WDS Paleoclimatology - Woodruff - Ant Butte PIPO - PIPO - ITRDB ID026

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/cc8bhjl
title: CCDC 248419: Experimental Crystal Structure Determination

description: Related Article: D.J.Jones, V.C.Gibson, S.M.Green, P.J.Maddox, A.J.P.White, D.J.Williams|2005|J.Am.Chem.Soc.|127|11037|doi:10.1021/ja0518171
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/cc8bhkm
title: CCDC 248420: Experimental Crystal Structure Determination

description: Related Article: D.J.Jones, V.C.Gibson, S.M.Green, P.J.Maddox, A.J.P.White, D.J.Williams|2005|J.Am.Chem.Soc.|127|11037|doi:10.1021/ja0518171
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.