cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/r21a-ze84
title: NOAA/WDS Paleoclimatology - Labrador and Nunavut Mg/Ca and d18O Data from Coralline Algae covering 1745-2014 CE

description: High-latitude climate reconstructions are essential for discerning anthropogenic climate change from natural climate variability. Since observational high-latitude climate records are rare prior to the satellite era, climate proxies such as the coralline algae Clathromorphum compactum are needed to generate these reconstructions. C. compactum is distributed across the northern high latitudes and documents environmental variability in the magnesium-to-calcium ratio (Mg/Ca) and d18O composition of its calcite skeleton. Therefore, paired Mg/Ca and d18O analyses in C. compactum are a promising new tool for reconstructing historic high-latitude climate change. Here a new method for C. compactum Mg/Ca analysis, laser ablation-inductively coupled plasma-optical emission spectroscopy (LA-ICP-OES), was verified through comparisons with parallel Mg/Ca transects using established techniques in a specimen from Labrador, Canada. Next, LA-ICP-OES Mg/Ca analysis in two specimens from Nunavut, Canada, was paired with d18O analyses. While Mg/Ca data across all specimens captured seasonal sea surface temperature (SST) variability, Mg/Ca values differed in replicate transects within skeleton formed at the same time regardless of technique used. This reduces the effectiveness of C. compactum Mg/Ca as a SST proxy on interannual time scales. Mg/Ca values and d18O composition differed between the two Nunavut specimens, and only one of them documented local SST, sea ice cover, and sea surface salinity. This indicates that climate archive verification is required for each unique coralline algal specimen. In the specimen from Nunavut verified here, paired Mg/Ca and d18O analyses produced more robust sea ice cover/sea surface salinity reconstructions than d18O analyses alone, supporting further development of this proxy system.
description: Mg/Ca and d18O data for 3 coralline algae specimens
       Provided Keywords: Coralline algae, LA-ICP-OES, Arctic SST, Mg/Ca, d18O
DOI: 10.5517/cc6nth4
title: CCDC 198756: Experimental Crystal Structure Determination

description: Related Article: Gon-Ann Lee, Chih-Hwa Cherng, Ai Ni Huang, Yu-Hsien Lin|2003|Tetrahedron|59|1539|doi:10.1016/S0040-4020(03)00046-2
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/cc6ntj5
title: CCDC 198757: Experimental Crystal Structure Determination

description: Related Article: Gon-Ann Lee, Chih-Hwa Cherng, Ai Ni Huang, Yu-Hsien Lin|2003|Tetrahedron|59|1539|doi:10.1016/S0040-4020(03)00046-2
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/cc6ntk6
title: CCDC 198758: Experimental Crystal Structure Determination

description: Related Article: Gon-Ann Lee, Chih-Hwa Cherng, Ai Ni Huang, Yu-Hsien Lin|2003|Tetrahedron|59|1539|doi:10.1016/S0040-4020(03)00046-2
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/rfmt-wb36
title: NOAA/WDS Paleoclimatology - Alkenone SST reconstructions from the eastern tropical Pacific 0-30 ky BP

description: The equatorial cold tongue (ECT) of the eastern Pacific is the most dynamic ocean region in the world's tropics and sets the tempo for global climate anomalies arising from El Niño–Southern Oscillation (ENSO) events. This region's deglaciation history and relationship with north and south polar climates remains poorly understood, impeding integration of tropical Pacific ocean-atmosphere dynamics and ENSO variability in our understanding of glacial cycles. Here we present alkenone reconstructions of sea surface temperature (SST) across the last glacial termination from five ECT cores east of the Galapagos Islands. A composite index of SST based on these demonstrates strong temporal affinity with the two-step deglaciation of the Northern Hemisphere, composed of two distinct warming steps at the beginning of the Bölling and the end of the Younger Dryas intervals. Within dating uncertainty, warming in the ECT began in phase with the Bölling excursion, was followed by a 2–3 ka plateau, and resumed with a second pulse at the end of the Younger Dryas. On the basis of our reconstructions, about two thirds of the warming materialized at or after the end of the Younger Dryas, implying a marked delay in the region's response to deglaciation. The results challenge the prevailing paradigm that ECT deglacial history conforms to an Antarctic timing, commonly attributed to advection from the Southern Ocean through an interior oceanic link, or to synchronous response of both regions to CO2 forcing. Our results emphasize instead the role of dynamical adjustments linked to Northern Hemisphere processes, most likely transmitted through the atmosphere.
description: Provided Keywords: Eastern Equatorial Pacific, alkenones
DOI: 10.5517/cc6ntl7
title: CCDC 198759: Experimental Crystal Structure Determination

description: Related Article: Gon-Ann Lee, Chih-Hwa Cherng, Ai Ni Huang, Yu-Hsien Lin|2003|Tetrahedron|59|1539|doi:10.1016/S0040-4020(03)00046-2
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/raby-9e31
title: NOAA/WDS Paleoclimatology - Johnson fire data from Middle Rio Pueblo, northern New Mexico - IMPD USMRP002

description: Tree-ring fire scars, tree ages, historical photographs, and historical surveys demonstrate that fire played different ecological roles for centuries across gradients of elevation, forest, and fire regime in the Taos Valley Watersheds. Fire regimes collapsed across these three adjoining watersheds by 1899, leaving all sites without fire for at least 119 years. Historical photographs and quaking aspen (Populus tremuloides Michx.) ages indicate that high-severity fire historically burned at multiple high-elevation subalpine sites in today’s Village of Taos Ski Valley, with large high-severity patches (> 640 ha). Low-severity, frequent (9 – 29 year median interval) surface fires burned in nearby mid-elevation dry conifer forests on south aspects in all watersheds. Fires were associated with drought during the fire year, preceded by wet years, with widespread fires commonly burning synchronously in multiple watersheds during more-severe drought years, including within all three watersheds in 1664, 1715, and 1842. In contrast, recent “large” wildfires have burned within single watersheds and therefore are likely not large in a historical context. Management to promote repeated low-severity fire and associated open forest stand structures is within the historical range of variability in the dry conifer forests of these watersheds, but in the high-elevation, subalpine forests different management approaches are required that balance ecological and socio-economic values while providing for public safety.
description: This site was sampled as part of a project to reconstruct the fire history of the Taos Valley Watersheds in northern New Mexico.                                         https://www.ncei.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/usmrp002_tree_meta.csv contains individual tree locations and tree species. The site was located on Taos Pueblo.
DOI: 10.5517/cc6ntm8
title: CCDC 198760: Experimental Crystal Structure Determination

description: Related Article: Gon-Ann Lee, Chih-Hwa Cherng, Ai Ni Huang, Yu-Hsien Lin|2003|Tetrahedron|59|1539|doi:10.1016/S0040-4020(03)00046-2
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/rtmw-bm52
title: NOAA/WDS Paleoclimatology - San Lázaro Basin, Eastern Pacific Sediment Geochemical Data over the Last 2 Millennia

description: How climate warming is going to affect the multidecadal climate variability in the North Pacific remains an open question. Here we present a record of this type of variability inferred from carbon productivity and sea surface temperature (SST) proxies in high resolution sediment records from the Southern California Current System (CCS). The reconstruction covers ~1800 years of the Common Era, and is associated with the latitudinal migration of the CCS tropical boundary at multidecadal timescales. Inorganic carbon proxies and a Globigerinoides ruber Mg/Ca summer SST reconstruction are associated with the intrusion of the tropical waters in the Southern CCS, and organic carbon proxies with the strength of the California Current (CC). From these and other sediment components we derived a principal component that seems to capture the balance between tropical and subarctic waters in the study region. This principal component record shows further connections with land moisture records, which suggests a link with Pacific basin scale climate reorganization. The results show periods of reduced Pacific multidecadal climate variability associated with cold periods in the Northern Hemisphere (NH). We propose a mechanism related with the southward migration of the westerlies during relatively cool periods in the NH, and a southward shift of the North Pacific Current, which could have reduced the advection of subarctic waters to the subtropical region.
description: Weight percentage of carbonate and organic carbon in marine sediments. Water depths range from -528 to -540 m.
DOI: 10.5517/cc6py4y
title: CCDC 199830: Experimental Crystal Structure Determination

description: Related Article: K.A.Evans, K.Beshah, D.H.Young, T.T.Fujimoto, C.M.Tice, E.L.Michelotti|2003|Tetrahedron|59|2223|doi:10.1016/S0040-4020(03)00216-3
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/rm15-5n38
title: NOAA/WDS Paleoclimatology - West Pacific Warm Pool Fossil Planktic Foraminifer Trace Metal and Oxygen Isotope Data during the Pliocene

description: A controversial aspect of Pliocene (5.3-2.6 Ma) climate is whether El Niño-like (El Padre) conditions, characterized by a reduced trans-equatorial sea surface temperature (SST) gradient, prevailed across the Pacific. Evidence for El Padre is chiefly based on reconstructions of sea-surface conditions derived from the oxygen isotope (d18O) and Mg/Ca compositions of shells belonging to the planktic foraminifer Trilobatus sacculifer. However, fossil shells of this species are a mixture of multiple carbonate phases - pre-gametogenic, gametogenic (reproductive), and diagenetic calcites - that formed under different physiological and/or environmental conditions and are averaged in conventional whole-shell analyses. Through in situ measurements of micrometer-scale domains within Pliocene-aged shells of T. sacculifer from Ocean Drilling Program Site 806 in the western equatorial Pacific, we show that the d18O of gametogenic calcite is 0.6-0.8‰ higher than pre-gametogenic calcite, while the Mg/Ca ratios of these two phases are the same. Both the whole-shell and pre-gametogenic Mg/Ca records indicate that average early Pliocene SSTs were ~1°C warmer than modern, with present-day SSTs being established during the latest Pliocene and early Pleistocene (~3.0-2.0 Ma). The measurement of multiple calcite phases by whole-shell d18O analyses masks a late Pliocene to earliest Pleistocene (3.6-2.2 Ma) decrease in seawater d18O (d18Osw) values reconstructed from in situ pre-gametogenic d18O and Mg/Ca measurements. Our novel d18Osw record indicates that sea-surface salinities in the west Pacific warm pool were higher than modern prior to ~3.5 Ma, which is consistent with more arid conditions under an El Padre state.
description: Oxygen isotope and Mg/Ca ratios of planktic foraminifera collected by SIMS and EPMA
      Provided Keywords: paleoceanography, foraminifera, oxygen isotopes, ion microprobe, electron microprobe
DOI: 10.5517/cc6ql0h
title: CCDC 200446: Experimental Crystal Structure Determination

description: Related Article: M.Arun, S.N.Joshi, V.G.Puranik, B.M.Bhawal, A.R.A.S.Deshmukh|2003|Tetrahedron|59|2309|doi:10.1016/S0040-4020(03)00239-4
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/cc6r402
title: CCDC 200973: Experimental Crystal Structure Determination

description: Related Article: R.Kammler, K.Polborn, K.Th.Wanner|2003|Tetrahedron|59|3359|doi:10.1016/S0040-4020(03)00406-X
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/cc6sfx9
title: CCDC 202241: Experimental Crystal Structure Determination

description: Related Article: M.Noguchi, M.Shirai, K.Nakashima, I.Arai, A.Nishida, H.Yamamoto, A.Kakehi|2003|Tetrahedron|59|4581|doi:10.1016/S0040-4020(03)00657-4
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.3r4kb7
title: Occurrence Download

description: A dataset containing 473 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Vachellia rigidula)",
 "StateProvince is one of (Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southwest, Texas)",
 "BasisOfRecord is Specimen"
 ]
}

 The dataset includes 473 records from 49 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0021317-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/rveq-yk57
title: NOAA/WDS Paleoclimatology - Tien Shan 391 Year Summer Temperature Reconstruction

description: The Tien Shan is the largest independent latitudinal mountain ranges in Eurasia, but due to a lack of long-term instrumental data, knowledge of past temperature variability in the Tien Shan is limited. In this paper, a maximum latewood density (MXD) chronology of Schrenk spruce (Picea schrenkiana) was constructed from the Tien Shan, Central Asia. Correlation analyses indicate that the MXD variations of spruce trees in the Tien Shan are mainly limited by summer temperature variations. The July-August mean temperature was reconstructed for the Tien Shan back to 1615 CE. The temperature reconstruction explained 42.9% of the instrumental variance (1930¨C2005). This reconstruction successfully captured the past temperature variabilities in the Tien Shan and enabled visualization of the cool climate before 1850s and the climatic warming after the 1850s. Agreement among the temperature series of the Tien Shan and regional temperature records based on MXDs from Eurasia suggested that our reconstruction had good reliability, captured some warm/cold periods, and first principal component (PC1) of these MXD records showed that there are strong large-scale temperature forcings in Eurasia. Our study also showed that there is a linkage between temperature changes in Central Asia and the atmospheric circulations of the middle-high latitude westerly region and the sea surface temperatures of both the Pacific Ocean and the Atlantic Ocean. The positive correlations among the PC1 time series of regional temperature reconstructions based on MXDs and Northern Hemisphere temperature reconstructions revealed that the MXD chronologies from Central Asia have the potential for developing large-scale temperature reconstruction.
description: Tien Shan summer (July-August) temperature reconstruction for the past 391 years, based on tree-ring maximum density.
DOI: 10.5517/cc6typm
title: CCDC 203691: Experimental Crystal Structure Determination

description: Related Article: A.Avenoza, J.H.Busto, F.Corzana, G.Jimenez-Oses, J.M.Peregrina|2003|Tetrahedron|59|5713|doi:10.1016/S0040-4020(03)00852-4
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/rxxj-f034
title: NOAA/WDS Paleoclimatology - Gutiérrez - Pinar de Lillo - PISY - ITRDB SPAI083

description: Aim

The aim was to decipher Europe‐wide spatio-temporal patterns of forest growth dynamics and their associations with carbon isotope fractionation processes inferred from tree rings as modulated by climate warming.
Location

Europe and North Africa (30-70 N, 10 W-35 E).
Time period

1901-2003.
Major taxa studied

Temperate and Euro-Siberian trees.
Methods

We characterize changes in the relationship between tree growth and carbon isotope fractionation over the 20th century using a European network consisting of 20 site chronologies. Using indexed tree-ring widths (TRWi), we assess shifts in the temporal coherence of radial growth across sites (synchrony) for five forest ecosystems (Atlantic, boreal, cold continental, Mediterranean and temperate). We also examine whether TRWi shows variable coupling with leaf-level gas exchange, inferred from indexed carbon isotope discrimination of tree-ring cellulose (Delta13Ci).

Results

We find spatial autocorrelation for TRWi and Delta13Ci extending over a maximum of 1,000 km among forest stands. However, growth synchrony is not uniform across Europe, but increases along a latitudinal gradient concurrent with decreasing temperature and evapotranspiration. Latitudinal relationships between TRWi and Delta13Ci (changing from negative to positive southwards) point to drought impairing carbon uptake via stomatal regulation for water saving occurring at forests below 60 N in continental Europe. An increase in forest growth synchrony over the 20th century together with increasingly positive relationships between TRWi and Delta13Ci indicate intensifying impacts of drought on tree performance. These effects are noticeable in drought-prone biomes (Mediterranean, temperate and cold continental).
Main conclusions

At the turn of this century, convergence in growth synchrony across European forest ecosystems is coupled with coordinated warming-induced effects of drought on leaf physiology and tree growth spreading northwards. Such a tendency towards exacerbated moisture-sensitive growth and physiology could override positive effects of enhanced leaf intercellular CO2 concentrations, possibly resulting in Europe‐wide declines of forest carbon gain in the coming decades.
description: NOAA Template Raw Measurements file added 2020-01-15.
DOI: 10.5517/cc83t49
title: CCDC 241990: Experimental Crystal Structure Determination

description: Related Article: C.F.B.da Silva, S.Schwarz, M.G.Mestres, J.Strahle|2004|Z.Anorg.Allg.Chem.|630|2231|doi:10.1002/zaac.200400180
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/rf5k-xj49
title: NOAA/WDS Paleoclimatology - Therrell - Vermilion River - QUSP - ITRDB IL024

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: Kickapoo State Park, October 29th, 2014, Q. alba, Q. macrocarpa NOAA Template Raw Measurements file added 2020-03-09.
DOI: 10.5517/cc83t5b
title: CCDC 241991: Experimental Crystal Structure Determination

description: Related Article: C.F.B.da Silva, S.Schwarz, M.G.Mestres, J.Strahle|2004|Z.Anorg.Allg.Chem.|630|2231|doi:10.1002/zaac.200400180
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/r7dg-ne48
title: NOAA/WDS Paleoclimatology - de Graauw - Diamond Barn - QUAL - ITRDB WV019

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: Chronology derived from log building (Diamond Barn; DB). NOAA Template Raw Measurements file added 2020-03-09.