cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/p19f-9120
title: NOAA/WDS Paleoclimatology - Boswijk - Pitt Street - AGAU - ITRDB NEWZ096

description: It is not known how global warming will affect the El Niño/Southern Oscillation (ENSO). The instrumental record is too short to discern centennial-scale trends and modelling results are inconclusive1, 2, 3, 4, 5. Proxy reconstructions indicate that ENSO activity was relatively high during the late twentieth century6, 7, 8, 9, 10, but whether this was unusual in the millennial context remains uncertain. Here we present insights into these issues derived from rings of the kauri tree (Agathis australis), a rare long-lived conifer endemic to the forests of northern New Zealand. Our results indicate that the twentieth century was the most ‘ENSO-active’ century of the past 500 years, but may not be unique in the context of the past 700 years, and that ENSO activity comparable to or elevated above that experienced during the late twentieth century is plausible under warmer-than-present conditions. We also find evidence that there may have been significant changes in the ENSO teleconnection to the New Zealand region during the fourteenth and fifteenth centuries, and of multi-decadal fluctuations in ENSO-related activity building up to the present day. Although these two features may delay the expression of increased ENSO activity in the New Zealand region, our results indicate that New Zealand climate is likely to be more dominated by ENSO-related inter-annual variability as the world continues to warm.
description: Purpose of collection: 
# # Archaeology - construction (felling dates)
# # 
# # Cores stored at: 
# # Single sample stored at the Tree-Ring Laboratory, School of 
# # Environment, University of Auckland. Available to view on site.
# # 
# # References:
# # Fowler AM, Boswijk G, Lorrey AM, Gergis J, Pirie M, McCloskey SPJ, 
# # Palmer JG, Wunder J. 2012. Multi-centennial tree-ring record of ENSO-
# # related activity in New Zealand. Nature Climate Change 2: 172 - 176.
# # 
# # NOTES: 
# # Single sample recovered from a well on upper Pitt Street (PITT), 
# # Auckland City for dating. Raw ring width measurement (0.01 mm). 
# # Included in late-Holocene kauri chronology data set. See supplementary 
# # information in Fowler et al 2012 for further details.
# # 
# # No site report. 
# # 
# #  NOAA Template Raw Measurements file added 2019-01-24. NOAA Template Raw Measurements file added 2019-02-01.
DOI: 10.5517/cc6dkrw
title: CCDC 190828: Experimental Crystal Structure Determination

description: Related Article: S.Pavlik, R.Schmid, K.Kirchner, K.Mereiter|2004|Monatsh.Chem.|135|1349|doi:10.1007/s00706-004-0222-6
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/pw4j-za34
title: NOAA/WDS Paleoclimatology - Bigler - Felsberg GR Brennten - PISY - ITRDB SWIT269

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Chronology file added 2018-12-19. NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.5517/cc812p1
title: CCDC 239372: Experimental Crystal Structure Determination

description: Related Article: P.Emseis, P.Leverett, P.A.Williams, R.J.Butcher|2004|Inorg.Chim.Acta|357|4614|doi:10.1016/j.ica.2004.06.062
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/p9f9-ck54
title: NOAA/WDS Paleoclimatology - South America 180 Year Tree Ring Stable Isotope Data

description: We present results on the relationship between tree ring proxies and regional precipitation for several sites in tropical South America. The responsiveness of oxygen isotopes (d18O) and seasonal growth as precipitation proxies was first validated by high- resolution sampling of a Tachigali myrmecophila from Manaus, Brazil (3.1ºS, 60.0ºW).  Monthly growth of Tachigali spp. was significantly correlated with monthly precipitation. Intra-annual measurements of cellulose d18O in Tachigali spp. were also significantly correlated with monthly precipitation at a lag of approximately one month. The annual ring-widths of two tropical tree taxa, Cedrela odorata growing in the Amazon (12.6ºS, 69.2ºW) and Polylepis tarapacana growing in the Altiplano (22.0ºS, 66.0ºW), were validated using bomb-derived radiocarbon 14C. Estimated dates were within two to three years of bomb inferred 14C dates, indicating that these species exhibit annual rings but uncertainties in our chronologies remain. A multi-proxy record spanning 180 years from Cedrela spp. showed a significant negative relationship between cellulose d18O and January precipitation. A 150-year record obtained from Polylepis spp. also showed a significant negative relationship between d18O and March precipitation, whereas annual ring width showed a significant positive correlation with December precipitation. These proxies were combined in a multivariate framework to reconstruct past precipitation, revealing a significant increase in monsoon precipitation at the Amazon site since 1890 and a significant decrease in monsoon precipitation at the Altiplano since 1880. Proxy time series also showed spatial and temporal coherence with precipitation variability due to El Niño forcing, suggesting that oxygen isotopes and ring widths in tropical trees may be important diagnostics for identifying regional differences in the response of the tropical hydrologic cycle to anthropogenic warming.
description: Tree ring isotope data from two South American locations and species, Cedrela odorata from the upper Amazon Basin and Polylepis tarapacana from the Altiplano.  The isotope data correlate with seasonal precipitation and provide a monsoon strength signal for the Amazon and Altiplano for the past 180 years. 
IITRDB006
DOI: 10.5517/cc8tvqm
title: CCDC 263181: Experimental Crystal Structure Determination

description: Related Article: M.Messerschmidt, S.Scheins, P.Luger|2005|Acta Crystallogr.,Sect.B:Struct.Sci.|61|115|doi:10.1107/S0108768104032781
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/phyg-dw45
title: NOAA/WDS Paleoclimatology - D'Arrigo - Wrangells Composite - PCGL - ITRDB AK116

description: Previous tree-ring-based Northern Hemisphere temperature reconstructions portray a varying amplitude range between the "Medieval Warm Period" (MWP), "Little Ice Age" (LIA) and present. We describe a new reconstruction, developed using largely different methodologies and additional new data compared to previous efforts. Unlike earlier studies, we quantify differences between more traditional (STD) and Regional Curve Standardization (RCS) methodologies, concluding that RCS is superior for retention of low-frequency trends. Continental North American versus Eurasian RCS series developed prior to merging to the hemispheric scale cohere surprisingly well, suggesting common forcing, although there are notable deviations (e.g., fifteenth to sixteenth century). Results indicate clear MWP (warm), LIA (cool), and recent (warm) episodes. Direct interpretation of the RCS reconstruction suggests that MWP temperatures were nearly 0.7C cooler than in the late twentieth century, with an amplitude difference of 1.14C from the coldest (1600-1609) to warmest (1937-1946) decades. However, we advise caution with this analysis. Although we conclude, as found elsewhere, that recent warming has been substantial relative to natural fluctuations of the past millennium, we also note that owing to the spatially heterogeneous nature of the MWP, and its different timing within different regions, present palaeoclimatic methodologies will likely "flatten out" estimates for this period relative to twentieth century warming, which expresses a more homogenous global "fingerprint." Therefore we stress that presently available paleoclimatic reconstructions are inadequate for making specific inferences, at hemispheric scales, about MWP warmth relative to the present anthropogenic period and that such comparisons can only still be made at the local/regional scale.
description: NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.5517/cc8tvrn
title: CCDC 263182: Experimental Crystal Structure Determination

description: Related Article: M.Messerschmidt, S.Scheins, P.Luger|2005|Acta Crystallogr.,Sect.B:Struct.Sci.|61|115|doi:10.1107/S0108768104032781
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/cc8tvsp
title: CCDC 263183: Experimental Crystal Structure Determination

description: Related Article: M.Messerschmidt, S.Scheins, P.Luger|2005|Acta Crystallogr.,Sect.B:Struct.Sci.|61|115|doi:10.1107/S0108768104032781
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/cc8tvtq
title: CCDC 263184: Experimental Crystal Structure Determination

description: Related Article: M.Messerschmidt, S.Scheins, P.Luger|2005|Acta Crystallogr.,Sect.B:Struct.Sci.|61|115|doi:10.1107/S0108768104032781
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/cc8qxyt
title: CCDC 260367: Experimental Crystal Structure Determination

description: Related Article: M.Ueda, T.Saito, K.Fujimori, T.Moriuchi, Y.Shibutani|2004|Anal.Sci.|20|1649|doi:10.2116/analsci.20.1649
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/pyyr-0e96
title: NOAA/WDS Paleoclimatology - Fennoscandia 1100 Year Summer Sunshine Reconstruction

description: Cloud cover is one of the most important factors controlling the radiation balance of the Earth. The response of cloud cover to increasing global temperatures represents the largest uncertainty in model estimates of future climate because the cloud response to temperature is not well constrained. Here we present the first regional reconstruction of summer sunshine over the past millennium, based on the stable carbon isotope ratios of pine tree rings from Fennoscandia. Comparison with the regional temperature evolution reveals the Little Ice Age (LIA) to have been sunny, with cloudy conditions in the warmest periods of the Medieval at this site. A negative shortwave cloud feedback is indicated at high latitude. A millennial climate simulation suggests that regionally low temperatures during the LIA were mostly maintained by a weaker greenhouse effect due to lower humidity. Simulations of future climate that display a negative shortwave cloud feedback for high-latitudes are consistent with our proxy interpretation.
description: Reconstruction of summer sunshine over the past 1100 years, 
based on the stable carbon isotope ratios of pine tree rings 
from Fennoscandia. Data are presented as 9-year smoothed 
estimate of July and August average daily sunshine hours 
at Laanila, Finland, 68°30'N, 27°30'E.  

Details on 9-yr Smoothing
The sub-fossil chronology was built using eight cohorts of trees 
of increasing calendar age. The 5-year-pool method (Boettger et al., 
2009) was used to target the multi-decadal and lower frequency 
climate information of interest without recourse to time consuming 
annual sampling. Blocks, each containing five rings, were offset 
by one year between each of five trees per cohort. Using this method, 
when each block value for each tree is averaged across each year, 
the final chronology approximates a 9-year centralized moving average 
and does not retain the inter-annual signal such that the series 
is produced by physical smoothing using the block cutting system.  
We supplemented this 5-year 'offset pooling' method with an additional 
step for checking the absolute d13C value at cohort joins to encourage 
low frequency signal retention. Where cohorts meet, the mean absolute 
d13C value was checked, for a short overlap period, via a series of 8 
join-points. At each join-point a much larger number of trees 
(average n=16, Table SM1) were analyzed over a single 5-yr block. 
The offset between the raw d13C chronology and the 'true' mean 
at the join-points was small (average 0.1‰ with a standard deviation 
of 0.4‰).  

Details on calculation of error bars
The total error on the chronology (Figure Supporting Material 2) 
represents the square root of the sum of 'raw' error (sigma1 the 
95% confidence limit calculated from the average and standard 
deviation of 5 trees for each data point, in raw form, non join 
point corrected) and the 95% confidence limit on each join-point 
(sigma2). The total error thus was calculated as: 
Total error = sqrrt ((sigma1e2) + (sigma2e2))
DOI: 10.5517/cc7nd6g
title: CCDC 228135: Experimental Crystal Structure Determination

description: Related Article: M.Sanselme, J.-M.Greneche, M.Riou-Cavellec, G.Ferey|2004|Solid State Sciences|6|853|doi:10.1016/j.solidstatesciences.2004.04.001
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/pc23-cq64
title: NOAA/WDS Paleoclimatology - Elferts - Spare - PISY - ITRDB LATV002

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Raw Measurements file added 2019-02-05. July 2024: Elevation added by WDS-Paleo using get_elev_point() from the elevatr R package with the AWS Terrain Tiles (aws) and WGS 84 reference frame.
DOI: 10.5517/cc7g6f9
title: CCDC 222190: Experimental Crystal Structure Determination

description: Related Article: I.Alkorta, J.Elguero, N.Jagerovic, A.Fruchier, G.P.A.Yap|2004|J.Heterocycl.Chem.|41|285|doi:10.1002/jhet.5570410223
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/phfv-rv86
title: NOAA/WDS Paleoclimatology - Eastern Equatorial Pacific Early Pliocene Mg/Ca Subsurface Temperature

description: During the early Pliocene warm period (~4.6-4.2 Ma) in the Eastern Equatorial Pacific upwelling region, sea surface temperatures were warm in comparison to modern conditions. Warm upwelling regions have global effects on the heat budget and atmospheric circulation, and are argued to have contributed to Pliocene warmth. Though warm upwelling regions could be explained by weak winds and/or a deep thermocline, the temporal and spatial evolution of the equatorial thermocline is poorly understood. Here we reconstruct temporal and spatial changes in subsurface temperature to monitor thermocline depth and show the thermocline was deeper during the early Pliocene warm period than it is today. We measured subsurface temperature records from Eastern Equatorial Pacific ODP transect Sites 848, 849, and 853 using Mg/Ca records from Globorotalia tumida, which has a depth habitat of ~50-100 m. In the early Pliocene, subsurface temperatures were ~4-5Â°C warmer than modern temperatures, indicating the thermocline was relatively deep. Subsurface temperatures steeply cooled ~2-3Â°C from 4.8 to 4.0 Ma and continued to cool an additional 2-3Â°C from 4.0 Ma to present. Compared to records from other regions, the data suggests the pronounced subsurface cooling between 4.8 and 4.0 Ma was a regional signal related to restriction of the Isthmus of Panama, while continued cooling from 4.0 Ma to present was likely related to global processes that changed global thermocline structure. Additionally, the spatial evolution of the equatorial thermocline along a N-S transect across ODP Sites 853, 849 and 848 suggests an intensification of the southeast trades from the Pliocene to present. Large-scale atmospheric and oceanographic circulation processes link high and low latitude climate through their influence on equatorial thermocline source water regions and consequently the equatorial thermocline. Through these low latitude/high latitude linkages, changes in the equatorial thermocline and thermocline source water played an important role in the transition from the warm Pliocene to the cold Pleistocene.
description: Mg/Ca paleothermometry from the planktonic foraminifera Globorotalia tumida from the past ~5 Ma at Ocean Drilling Program (ODP) Site 848 in the eastern equatorial Pacific
DOI: 10.25921/p32y-v398
title: NOAA/WDS Paleoclimatology - Shanxi Gonghai Lake, North China, Humid Medieval Warm Period

description: Variations in monsoon strength, moisture or precipitation in eastern China during the MWP reflected by different climatic records have shown apparent discrepancies. Here, detailed environmental magnetic investigations and mineralogical analyses were conducted on lacustrine sediments of Core GH09B1 (2.8 m long) from Gonghai Lake, Shanxi, North China, concerning the monsoon history during the MWP. The results demonstrate that the main magnetic mineral is magnetite. The sediments with relatively high magnetic mineral concentrations were characterized by relatively fine magnetic grain sizes, which were formed in a period of relatively strong pedogenesis and high precipitation. In contrast, the sediments with low magnetic mineral concentrations reflected an opposite process. The variations of magnetic parameters in Gonghai Lake sediments were mainly controlled by the degree of pedogenesis in the lake drainage basin, which further indicated the strength of the Asian summer monsoon. The variations in the χ and S-300 parameters of the core clearly reveal the Asian summer monsoon history over the last 1200 years in the study area, suggesting generally abundant precipitation and a strong summer monsoon during the Medieval Warm Period (MWP, AD 910–1220), which is supported by pollen evidence. Furthermore, this 3–6-year resolution environmental magnetic record indicates a dry event around AD 980–1050, interrupting the generally humid MWP. The summer monsoon evolution over the last millennium recorded by magnetic parameters in sediments from Gonghai Lake correlates well with historical documentation (North China) and speleothem oxygen isotopes (Wanxiang Cave), as well as precipitation modeling results (extratropical East Asia), which all indicate a generally humid MWP within which centennial-scale moisture variability existed. It is thus demonstrated that environmental magnetic parameters could be used as an effective proxy for monsoon climate variations in high-resolution lacustrine sediments.
description: Environmental magnetic record ( χ and S-300) of lacustrine sediments (core GH09B1) from Gonghai Lake, North China. All AMS 14C dates were generated from  samples of terrestrial plant macrofossils. The AMS 14C samples were all first prepared with the standard pretreatment (alkali–acid–alkali) and then measured at the AMS Dating Laboratory of the Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China. All dates were calibrated to calendar years using OXCAL4.1 software using the IntCal04 calibration data set.
DOI: 10.5517/cc7zyy2
title: CCDC 238295: Experimental Crystal Structure Determination

description: Related Article: Man Lok Man, Jun Zhu, Siu Man Ng, Zhongyuan Zhou, Chuanqi Yin, Zhenyang Lin, Chak Po Lau|2004|Organometallics|23|6214|doi:10.1021/om049403o
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/ph8v-2c22
title: NOAA/WDS Paleoclimatology - Jacoby - Thelon - PCGL - ITRDB CANA318

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Raw Measurements file added 2019-01-27. NOAA Template Raw Measurements file added 2019-02-04.