cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5517/cc8wjsf
title: CCDC 264795: Experimental Crystal Structure Determination

description: Related Article: W.Shimada, M.Shiro, H.Kondo, S.Takeya, H.Oyama, T.Ebinuma, H.Narita|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o65|doi:10.1107/S0108270104032743
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/phvg-5h05
title: NOAA/WDS Paleoclimatology - North Atlantic DSDP607 Plio-Pleistocene Alkenone SST Reconstructions

description: During the Plio-Pleistocene, the Earth witnessed the growth of large northern hemisphere ice sheets and profound changes in both North Atlantic and global climate. Here, we present a ~ 3.2 Myr long, orbitally-resolved alkenone sea surface temperature (SST) record from Deep Sea Drilling Project (DSDP) Site 607 (41°N, 33°W, water depth 3427 m) in the North Atlantic Ocean. We employ a multi-proxy approach comparing these new observations with existing bottom water temperature (BWT) and stable isotope time series from the same site and SST time series from other sites, shedding new light on Plio-Pleistocene climate change. North Atlantic temperature records show a long-term cooling with two major steps occurring during the late Pliocene (3.1 to 2.4 Ma) and the mid-Pleistocene (1.5 to 0.8 Ma), closely timed with intervals of major change in northern hemisphere ice sheets. Existing evidence suggests that the late Pliocene cooling may have been caused by a thresholded response to secular changes in atmospheric carbon dioxide (CO2). While an explanation for the mid-Pleistocene cooling may involve glacial–interglacial changes in atmospheric CO2, it seems to also require a change in the behavior of the ice sheets themselves. North Atlantic climate responses were closely phased with benthic oxygen isotope (δ18O) changes during the “41 kyr world,” indicating a strong common northern hemisphere high latitude imprint on North Atlantic climate signals. After the mid-Pleistocene transition (MPT), North Atlantic SST records and the Site 607 benthic carbon isotope (δ13C) record are more closely phased with δ18O, whereas BWT significantly leads δ18O in the 100 kyr band, suggesting a shift from a northern to a southern hemisphere influence on North Atlantic BWT. We propose that the expansion of the West Antarctic ice sheet (WAIS) across the MPT increased the production and export of Antarctic Bottom Water from the Southern Ocean and subsequently controlled its incursion into the North Atlantic, especially during glacial intervals. It follows that the early 100 kyr response of BWT implies an early response of the WAIS relative to the northern hemisphere deglaciation. Thus, in the “100 kyr world,” both northern hemisphere and southern hemisphere processes affect climate conditions in the North Atlantic Ocean.
description: This dataset consists of North Atlantic Alkenone Sea Surface 
Temperature estimates from DSDP Site 607 from 3.2 Ma to 0.25 Ma 
at ~3-4 kyr resolution. Alkenones are lipid compounds created by 
a few species of ocean surface dwelling algae. The alkenone 
unsaturation index (Uk'37 = [C37:2]/[C37:2] + [C37:3]) has been 
linearly calibrated to organism growth temperature and thus has 
been used as a means of estimating past ocean surface temperatures 
[Brassell, et al., 1986; Prahl and Wakeham, 1987]. We use the 
Prahl et al. [1988] calibration to generate estimates of past 
sea surface temperatures.
DOI: 10.5517/cc8wjtg
title: CCDC 264796: Experimental Crystal Structure Determination

description: Related Article: F.Seela, V.R.Sirivolu, Junlin He, H.Eickmeier|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o67|doi:10.1107/S0108270104032123
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/cc8wjvh
title: CCDC 264797: Experimental Crystal Structure Determination

description: Related Article: K.A.Solomon, R.Malathi, S.S.Rajan, G.Anitha, J.J.L.Raj, S.Narasimhan, G.Suresh, G.Gopalakrishnan|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o70|doi:10.1107/S0108270104031385
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/p6cr-m782
title: NOAA/WDS Paleoclimatology - Pederson - Hunter Island, Bronx - QUST - ITRDB NY019

description: Six water emergencies have occurred since 1981 for the New York City region (NYC) despite: 1) its perhumid climate, 2) substantial conservation of water since 1979 and 3) meteorological data showing little severe or extreme drought since 1970. We reconstruct 472 years of moisture availability for the NYC watershed to place these emergencies in long-term hydroclimatic context. Using nested reconstruction techniques, 32 tree-ring chronologies comprised of 12 species account for up to 66.2% of the average May-August Palmer Drought Severity Index. Verification statistics indicate good statistical skill from 1531-2003. The use of multiple tree species, including rarely-used species that can sometimes occur on mesic sites like Liriodendron tulipifera, Betula lenta and Carya spp., seems to aid reconstruction skill. Importantly, the reconstruction captures pluvial events in the instrumental record nearly as well as drought events and is significantly correlated to precipitation over much of the northeastern US. While the mid-1960s drought is a severe drought in the context of the new reconstruction, the region experienced repeated droughts of similar intensity, but greater duration during the 16th and 17th centuries. The full record reveals a trend towards more pluvial conditions since ca 1800 that is accentuated by an unprecedented, 43-year pluvial event that continues through 2011. In the context of the current pluvial, decreasing water usage, but increasing extra-urban pressures, it appears that the water supply system for the greater NYC region could be severely stressed if the current water boom shifts towards hydroclimatic regimes like the 16th and 17th centuries.
description: This collection of QUST raw ring widths was made by N. Pederson 
# on Hunter Island in the Bronx, NY. These data were collected for 
# a dendroecological study of southern temperate trees growing at 
# or near a northern range margin. They are growing on the edge 
# of a series of islands along the coast of the Bronx on very 
# shallow soils. While these trees are growing on the edge of 
# an island, some trees are partly over-topped by neighboring trees.  
# Detrending of these raw data with closed-canopy or forest interior 
# conditions in mind should be considered. NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.5517/cc8cvzf
title: CCDC 249735: Experimental Crystal Structure Determination

description: Related Article: K.A.Solomon, R.Malathi, S.S.Rajan, G.Anitha, J.J.L.Raj, S.Narasimhan, G.Suresh, G.Gopalakrishnan|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o70|doi:10.1107/S0108270104031385
description: Related Article: G.Anitha, J.J.L.Raj, S.Narasimhan, K.A.Solomon, S.S.Rajan|2006|J.Asian Nat.Prod.Res.|8|445|doi:10.1080/10286020500173267
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/cc8wjwj
title: CCDC 264798: Experimental Crystal Structure Determination

description: Related Article: Qing Wang, Xiang-Dong Pi, Cheng-Yong Su|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o73|doi:10.1107/S010827010403272X
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/cc8wjxk
title: CCDC 264799: Experimental Crystal Structure Determination

description: Related Article: C.Glidewell, J.N.Low, J.M.S.Skakle, J.L.Wardell|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o75|doi:10.1107/S0108270104033141
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/pc1t-3s52
title: NOAA/WDS Paleoclimatology - Terciopelo Cave, Costa Rica Speleothem Oxygen Isotope Data

description: We present a high-resolution terrestrial archive of Central American rainfall over the period 100-24 and 8.1-6.5 ka, based on d18O time series from U-series dated stalagmites collected from a cave on the Pacific Coast of Costa Rica. Our results indicate substantial d18O variability on millennial to orbital time scales that is interpreted to reflect rainfall variations over the cave site. Correlations with other paleoclimate proxy records suggest that the rainfall variations are forced by sea surface temperatures (SST) in the Atlantic and Pacific Oceans in a fashion analogous to the modern climate cycle. Higher rainfall is associated with periods of a warm tropical North Atlantic Ocean and large SST gradients between the Atlantic and Pacific Oceans. Rainfall variability is likely linked to the intensity and/or latitudinal position of the intertropical convergence zone (ITCZ). Periods of higher rainfall in Costa Rica are also associated with an enhanced sea surface salinity gradient on either side of the isthmus, suggesting greater freshwater export from the Atlantic Basin when the ITCZ is stronger and/or in a more northerly position. Further, wet periods in Central America coincide with high deuterium excess values in Greenland ice, suggesting a direct link between low latitude SSTs, tropical rainfall, and moisture delivery to Greenland. Our results indicate that a stronger tropical hydrological cycle during warm periods and large inter-ocean SST gradients enhanced the delivery of low latitude moisture to Greenland.
description: Stalagmite stable oxygen isotope values from Barra Honda National Park, Costa Rica, over 98 to 24 ka and 8.0 to 6.6 ka. In this tropical location, rainfall d18O values are inversely correlated with rainfall amount at and upwind of the sampling location, so the stalagmite d18O data are interpreted as a paleorainfall proxy record. 

We analyzed 1684 d18O subsamples at the Universities of Massachusetts and Saskatchewan, and at the Las Vegas Isotope Science Laboratory at the University of Nevada, Las Vegas. Stalagmites CT-5, CT-6, and CT-7 were subsampled for stable isotopes at a 1.0 mm interval, whereas CT-1 was subsampled every 0.5 mm. Samples were analyzed on ThermoElectron Delta + or Delta V mass spectrometers in Kiel III and IV automated carbonate preparation devices, where samples were reacted with phosphoric acid at 70°C to liberate CO2 gas. Values are reported as ‰ relative to the VPDB standard via regular calibration to an internal laboratory standard. Precision is better than 0.06‰ for d18O. A composite time series was created from stalagmites CT-1, -5, and -6 by splicing together the three records. The time series was then interpolated at a 100 year interval. The d18O data in this file for the spliced CT-1, CT-5, and CT-6 stalagmites are raw values, not corrected for change in d18O of ocean. Ages are in yr BP, where BP is time of U-series analysis of A.D. 2008.

The stalagmites were recovered from Barra Honda National Park, on the Nicoya Peninsula, Pacific Coast of Costa Rica.
DOI: 10.5517/cc8wjyl
title: CCDC 264800: Experimental Crystal Structure Determination

description: Related Article: V.N.Sonar, S.Parkin, P.A.Crooks|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o78|doi:10.1107/S0108270104032925
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/p351-w021
title: NOAA/WDS Paleoclimatology - Krusic - Xinjiaing MULA - PCTI - ITRDB CHIN035

description: The Asian monsoon system affects more than half of humanity worldwide, yet the dynamical processes that govern its complex spatiotemporal variability are not sufficiently understood to model and predict its behavior, due in part to inadequate long-term climate observations. Here we present the Monsoon Asia Drought Atlas (MADA), a seasonally resolved gridded spatial reconstruction of Asian monsoon drought and pluvials over the past millennium, derived from a network of tree-ring chronologies. MADA provides the spatiotemporal details of known historic monsoon failures and reveals the occurrence, severity, and fingerprint of previously unknown monsoon megadroughts and their close linkages to large-scale patterns of tropical Indo-Pacific sea surface temperatures. MADA thus provides a long-term context for recent monsoon variability that is critically needed for climate modeling, prediction, and attribution.
description: Purpose of Collection:  
# Climatology - precipitation analysis NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.5517/cc8gbtv
title: CCDC 252117: Experimental Crystal Structure Determination

description: Related Article: N.P.Rath, W.Haq, G.K.Balendiran|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o81|doi:10.1107/S0108270104032573
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/cc8wjzm
title: CCDC 264801: Experimental Crystal Structure Determination

description: Related Article: V.N.Sonar, S.Parkin, P.A.Crooks|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o78|doi:10.1107/S0108270104032925
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/pjfz-jw90
title: NOAA/WDS Paleoclimatology - Sniderhan - Scotty Creek - PCMA - ITRDB CANA557

description: High-latitude warming has led to radical changes in abiotic conditions influencing forest growth. In the North American boreal forest, widespread declines in forest productivity (particularly in western regions) and changing climate-growth relationships have been documented. Previous studies have proposed that this decline can be attributed to drought stress as increasing temperatures may cause evapotranspirative demand to exceed available moisture. We used tree ring studies to document growth dynamics of black spruce, one of the most dominant boreal tree species, in a boreal peatland experiencing rapid permafrost thaw. We specifically look at how changing permafrost conditions influence growth. Growth of black spruce at this site has declined steadily since the mid-1900s and exhibited a shift from positive responses to temperature pre-1970 to predominantly negative responses in recent decades, despite precipitation increasing over time at this site. Our results show that there is no apparent effect of landscape position or rate of lateral permafrost thaw on growth trends of black spruce, despite gradients in soil moisture and active layer thickness across the mosaic of wetlands and drier permafrost plateaus at this site. However, this does not imply no effect of permafrost thaw on growth; our results support growing evidence that vertical permafrost thaw (i.e., active layer thickening) is causing drought stress in these slow-growing, shallow-rooted trees. To our knowledge, this study is the first to investigate permafrost as a driver of within-site variability in growth-climate responses, and we provide insight into the widespread growth declines and divergence of climate-growth relationships in high-latitude forests.
description: Trees >7 cm DBH within seven stands at site were sampled extensively. NOAA Template Raw Measurements file added 2019-08-22. d13C data file added 2020-09-10.
DOI: 10.5517/cc8wk0p
title: CCDC 264802: Experimental Crystal Structure Determination

description: Related Article: Y.Ebead, A.Sikorski, K.Krzyminski, T.Lis, J.Blazejowski|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o85|doi:10.1107/S0108270104025156
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/pfw4-z661
title: NOAA/WDS Paleoclimatology - Lago Plomo Varve 470 Year Winter Precipitation Reconstruction

description: High-resolution climate reconstructions from a range of natural archives across the world are fundamental to place current climate change into perspective. Paleoclimate records for the Southern Hemisphere are scarce and only a few quantitative high-resolution reconstructions exist for the past millennium. We present a record of annually laminated sediments of Lago Plomo (46°59'S, 72°52'W, 203 m a.s.l.) located east of the Northern Patagonian Ice Field (NPI). Radiometric dating (210Pb, 137Cs, 14C AMS) is consistent with counts of millimetre-scale laminae, confirming the annual nature of the laminae couplets with a light summer and a dark winter layer. The varves were analyzed for thickness, mass accumulation rate (MAR), scanning x-ray fluorescence (XRF) and scanning reflectance spectroscopy in the visible range (VIS-RS). MAR data were calibrated against austral winter (JJA) precipitation data (CRU TS 3.0) for the period AD 1930–2002 (r = 0.67, p (aut) < 0.05). Using a linear inverse regression model we reconstructed winter precipitation for Lago Plomo back to AD 1530. The root mean squared error of prediction (RMSEP) is small (13.3 mm/month; 12% of the average precipitation) compared with the pronounced decadal and multidecadal variability, suggesting that most of the reconstructed variability is significant. Wetter phases (reference AD 1930-2002) were observed around AD 1600, AD 1630-1690 and AD 1780-1850, and a prolonged drier period AD 1690-1780 with a multidecadal minimum centered on AD 1770. The spatial correlation for South America suggests that the JJA precipitation record from Lago Plomo is representative for large areas in the southwest between c. 41°S and 51°S.
description: Austral Winter (JJA) precipitation reconstruction from 
varved sediments collected in Lago Plomo, Patagonian Andes. 
Mass accumulation rate (MAR) data correlate with austral 
winter (JJA) precipitation data (CRU TS 3.0), and are used 
to develop the 470 year austral winter precipitation 
reconstruction.  For the reconstruction, the raw MAR data 
was detrended with LOESS and a 5 year filter was applied. 

The record indicates lower winter precipitation (with regard 
to the twentieth century) for the second half of the sixteenth 
century followed by two decades with higher precipitation 
AD 1590-1610. Precipitation falls below the twentieth-century 
mean AD 1610-1630 while the second half of the seventeenth 
century was very humid. The eighteenth century experiences 
greater variability and generally very dry conditions.
The end of the eighteenth century is characterized by a sharp 
rise in precipitation above average AD 1780-1850, followed by 
drying until the end of the nineteenth century. Decadal and 
multidecadal variability is pronounced during the entire record.
DOI: 10.5517/cc8wk1q
title: CCDC 264803: Experimental Crystal Structure Determination

description: Related Article: Y.Ebead, A.Sikorski, K.Krzyminski, T.Lis, J.Blazejowski|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o85|doi:10.1107/S0108270104025156
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/pvnp-9b06
title: NOAA/WDS Paleoclimatology - Boswijk - Westney Farmstead Barn - AGAU - ITRDB NEWZ108

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: NOAA Template Raw Measurements file added 2019-02-01.
DOI: 10.5517/cc803n0
title: CCDC 238441: Experimental Crystal Structure Determination

description: Related Article: A.Bialonska, Z.Ciunik, T.Popek, T.Lis|2005|Acta Crystallogr.,Sect.C:Cryst.Struct.Commun.|61|o88|doi:10.1107/S0108270104031853
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.