cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.864808
title: Dinocyst-derived sea-surface characteristics, palynomorph abundances, ice-rafted debris, and planktonic foraminifera abundances and δ¹⁸O of the 35-41 ka BP interval of core MD99-2285

description: The last glacial millennial climatic events (i.e. Dansgaard-Oeschger and Heinrich events) constitute outstanding case studies of coupled atmosphere-ocean-cryosphere interactions. Here, we investigate the evolution of sea-surface and subsurface conditions, in terms of temperature, salinity and sea ice cover, at very high-resolution (mean resolution between 55 and 155 years depending on proxies) during the 35-41 ka cal BP interval covering three Dansgaard-Oeschger cycles and including Heinrich event 4, in a new unpublished marine record, i.e. the MD99-2285 core (62.69°N; -3.57°E). We use a large panel of complementary tools, which notably includes dinocyst-derived sea-ice cover duration quantifications. The high temporal resolution and multiproxy approach of this work allows us to identify the sequence of processes and to assess ocean-cryosphere interactions occurring during these periodic ice-sheet collapse events. Our results evidence a paradoxical hydrological scheme where (i) Greenland interstadials are marked by a homogeneous and cold upper water column, with intensive winter sea ice formation and summer sea ice melting, and (ii) Greenland and Heinrich stadials are characterized by a very warm and low saline surface layer with iceberg calving and reduced sea ice formation, separated by a strong halocline from a less warm and saltier subsurface layer. Our work also suggests that this stadial surface/subsurface warming started before massive iceberg release, in relation with warm Atlantic water advection. These findings thus support the theory that upper ocean warming might have triggered European ice-sheet destabilization. Besides, previous paleoceanographic studies conducted along the Atlantic inflow pathways close to the edge of European ice-sheets suggest that such a feature might have occurred in this whole area. Nonetheless, additional high resolution paleoreconstructions are required to confirm such a regional scheme.
description: Supplement to: Wary, Mélanie; Eynaud, Frédérique; Rossignol, Linda; Lapuyade, Joanna; Gasparotto, Marie-Camille; Londeix, Laurent; Malaizé, Bruno; Castera, Marie-Hélène; Charlier, Karine (2016): Norwegian Sea warm pulses during Dansgaard-Oeschger stadials: Zooming in on these anomalies over the 35–41 ka cal BP interval and their impacts on proximal European ice-sheet dynamics. Quaternary Science Reviews, 151, 255-272
DOI: 10.1594/pangaea.865418
title: Meteorological synoptical observations from station Fukuoka (2016-08)
DOI: 10.1594/pangaea.865419
title: Radiosonde measurements from station Fukuoka (2016-08)
DOI: 10.1594/pangaea.864764
title: Other measurements at 10 m from station Rock Springs (2011-08)
DOI: 10.1594/pangaea.864923
title: Basic measurements of radiation at station Boulder, SURFRAD (2012-04)
DOI: 10.1594/pangaea.864421
title: Basic measurements of radiation at station Boulder, SURFRAD (2011-09)
DOI: 10.1594/pangaea.864836
title: Other measurements at 10 m from station Sioux Falls (2011-03)
DOI: 10.1594/pangaea.864640
title: Ultra-violet measurements from station Goodwin Creek (2011-11)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-03.
DOI: 10.1594/pangaea.865453
title: Ultra-violet measurements from station Rock Springs (2012-02)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-03.
DOI: 10.1594/pangaea.864889
title: Ultra-violet measurements from station Bondville (2012-07)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-09.
DOI: 10.1594/pangaea.865329
title: Ultra-violet measurements from station Toravere (2016-09)

description: Values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-01-17. UVB is measured with Kipp&Zonen CUVB1 narrowband radiometer (bandwidth 306 ± 0.1 nm)
DOI: 10.1594/pangaea.865096
title: Interpolated maps of pollen percentages in Europe over the last 15,000 years, links to PDF files
DOI: 10.1594/pangaea.865455
title: Other measurements at 10 m from station Rock Springs (2012-02)
DOI: 10.1594/pangaea.864892
title: Ultra-violet measurements from station Bondville (2012-08)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-09.
DOI: 10.1594/pangaea.864895
title: Ultra-violet measurements from station Bondville (2012-09)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-09.
DOI: 10.1594/pangaea.864901
title: Ultra-violet measurements from station Bondville (2012-11)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-09.
DOI: 10.1594/pangaea.865130
title: Radiosonde measurements from station Tateno (2016-07)
DOI: 10.1594/pangaea.865139
title: Ultra-violet measurements from station Fort Peck (2012-02)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-03.
DOI: 10.1594/pangaea.865140
title: Other measurements at 10 m from station Fort Peck (2012-02)
DOI: 10.1594/pangaea.865017
title: Global ocean sea surface temperatures
DOI: 10.1594/pangaea.867482
title: Experimental results and characteristics of a solar concentrator with tracking system

description: Solar Energy has been, since the beginning of human civilization, a source of energy that raised considerable interest, and the technology used for their exploitation has developed constantly. Due to the energetic problems which society has been facing, the development of technologies to increase the efficiency of solar systems is of paramount importance. The solar concentration is a technology that has been used for many years by the scientist, because this system enables the concentration of solar energy in a focus, which allows a significant increase in energy intensity. The receiver, placed at the focus of the concentrator, can use the stored energy to produce electrical energy through Stirling engine, for example, or to produce thermal energy by heating a fluid that can be used in a thermal cycle. The efficiency of solar concentrators can be improved with the addition of a dual axis solar tracker system which allows a significant increase in the amount of stored energy. In response to the aforementioned, this paper presents the design and construction of a solar dish concentrator with tracking system at low cost, the optical and thermal modelling of this system and a performance analysis through experimental tests. The experimental validation allows to conclude that the application of a tracking system to the concentrator is very important since a minimum delay of the solar radiation leads to important losses of system efficiency. On the other hand, it is found that the external factors can affect the final results which include the optical and geometrical properties of the collector, the absorptivity and the position of the receiver as well as the weather conditions (essentially the wind speed and clouds). Thus, the paper aims to present the benefits of this technology in a world whose the consumption of energy by fossil fuels is a real problem that society needs to face.
description: Supplement to: Barbosa, Flavia; Afonso, João; Rodrigues, Filipe; Teixeira, José (2016): Development of a solar concentrator with tracking System. Mechanical Sciences, 7, 233-245
DOI: 10.1594/pangaea.865467
title: Other measurements at 10 m from station Rock Springs (2012-06)
DOI: 10.1594/pangaea.865473
title: Other measurements at 10 m from station Rock Springs (2012-08)
DOI: 10.1594/pangaea.865475
title: Ultra-violet measurements from station Rock Springs (2012-09)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-03.
DOI: 10.1594/pangaea.865145
title: Ultra-violet measurements from station Fort Peck (2012-04)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-03.
DOI: 10.1594/pangaea.865151
title: Ultra-violet measurements from station Fort Peck (2012-06)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-03.
DOI: 10.1594/pangaea.865156
title: Ultra-violet measurements from station Fort Peck (2012-08)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-03.
DOI: 10.1594/pangaea.865300
title: (Appendix C) Depositional flux of 230Th_ex and 10Be of sediment core GIK23235-3
DOI: 10.1594/pangaea.864982
title: Annotated record of the detailed examination of Mn deposits from R/V Mahi Cruise Abyssal Hills 69 stations

description: From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
DOI: 10.1594/pangaea.865162
title: Ultra-violet measurements from station Fort Peck (2012-10)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-03.
DOI: 10.1594/pangaea.864983
title: (Table 2, Page 15) Chemical composition of Abyssal Hills manganese deposits, Pacific Ocean

description: From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
DOI: 10.1594/pangaea.865146
title: Other measurements at 10 m from station Fort Peck (2012-04)
DOI: 10.1594/pangaea.866334
title: Other measurements at 10 m from station Sioux Falls (2012-05)
DOI: 10.1594/pangaea.865196
title: (Table 1, page 258) Chemical composition of 24 concentric layers inside manganese nodule DH9-9 from the Pacific Ocean

description: The minor-element composition of concentric layers within a single ferromanganese nodule from the eastern North Pacific exhibits strong correlations with Fe and Mn contents but appears to be independent of pronounced mineralogic variations. On the basis of these correlations, the elemental composition of individual layers apparently is controlled by the relative contribution of two sources: seawater, and interstitial water of associated sediment. In contrast, the mineralogy of the nodule, consisting of birnessite in the outer few layers and todorokite in the inner layers, is considered to be a function of nodule diagenesis.
description: From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
description: Supplement to: Piper, David Z; Williamson, M E (1981): Mineralogy and composition of concentric layers within a manganese nodule from the North Pacific Ocean. Marine Geology, 40(3-4), 255-268
DOI: 10.1594/pangaea.866337
title: Other measurements at 10 m from station Sioux Falls (2012-06)
DOI: 10.1594/pangaea.865233
title: Chemical composition of nodules from two locations in the Pacific Ocean using X microprobe analysis

description: From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
DOI: 10.1594/pangaea.867873
title: NEEM to EGRIP traverse - density of the surface snow (2 m profiles)
DOI: 10.1594/pangaea.866342
title: Ultra-violet measurements from station Sioux Falls (2012-08)

description: UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-02-03.
DOI: 10.1594/pangaea.866355
title: Other measurements at 10 m from station Sioux Falls (2012-12)
DOI: 10.1594/pangaea.865120
title: Interpolated files of pollen percentages in Europe over the last 15,000 years, link to zip archive

description: The files contain the interpolated data used in the paper: “Patterns and dynamics of European vegetation change over the last 15000 years”. Each row corresponds to one 0.5°x0.5° grid cell. The first two columns contain the longitude and latitude information for the centre of each 0.5° grid cell. Each of the following columns contains the value from 0 to 4, per 500-year time bin. These values correspond to one of the five abundance classes defined for each taxa (see Methods for details). Values of “-9999” indicate ice cover of that grid cell at that time. Missing values “NA” represent gridcells that were beyond the extrapolation range used.
DOI: 10.1594/pangaea.866331
title: Other measurements at 10 m from station Sioux Falls (2012-04)
DOI: 10.1594/pangaea.865236
title: Chemical composition of manganese nodules and a ferromanganese crust using Atomic absorption analysis

description: From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
DOI: 10.1594/pangaea.865237
title: Chemical composition of manganese nodules and a ferromanganese crust using Quantum emission analysis

description: From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
DOI: 10.1594/pangaea.864910
title: Chemical composition of a manganese nodule from the Blake Plateau, Atlantic Ocean

description: The area surveyed during project AMC-11-67 was the portion of the Blake Plateau between latitude 30°00'N and 33°00'N and between the 100 to 1000 fathom curves. The survey was conducted from 3 October until 18 October 1967. Survey operations included dredgings, camera and multi-sensor lowerings. A collection of manganese and phosphate concretions as well as coral and sediment samples were examined by the ESSA(NOAA) Atlantic Oceanographic Laboratories. Chemical analyses were conducted at the NASA Manned Spacecraft Center, Houston by Richard A. Laidley for X-Ray Fluorescence Analysis and H. Costello for Atomic Absorption Analysis. Later the whole collection of samples was transferred to the Smithsonian National Museum of Natural History were it is available for study (see, http://mineralsciences.si.edu/collections.htm).
description: This data belongs to: Grant, J. B., Laidley, R. A. and H. Costello 1968. Chemical analysis of manganese nodules retrieved during expedition AMC-11-67 of the USC&GSS Discoverer (Unpublished).From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis..) not present in the NOAA-MMS database.
DOI: 10.1594/pangaea.865204
title: (Table 3, page 8) Chemical composition and physical cahracteristics of manganese nodules from the Pacific Ocean

description: This paper reviews the state of the art in processing and extraction of ocean floor manganese nodules. It briefly reviews the mining sites where the abundant rich nodules occur and also discusses the metal distribution in nodules in view of economical processing and extraction of these metal values. The paper discloses in a detailed manner the physical and chemical characteristics of nodules, including porosity, surface area, water content and the effect of temperature on crystal structure of major constituents of nodules. In the extraction aspect of nodules, the paper reviews two different extraction schemes revealed in the literature, namely hydrometallurgical treatment and pyrometallurgical treatment. The hydrometallurgical treatments include acid leaching, ammonia leaching, leaching with reducing agents and leaching after high temperature pre-treatments such as in sulfating rousting, while the pyrometallurgical processes include smelting, chlorination-vaporization and segregation. The paper also covers metal recovery processes from leach liquor. An economic survey of processing nodules has been made in terms of problems associated with metal-marketing, and impact of metal production from nodules on mineral industries.
description: Content in H2O determined by heating the samples at 110°C for 24 hours.From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis..) not present in the NOAA-MMS database.
description: Supplement to: Fuerstenau, D W; Han, K N (1983): Metallurgy and processing of marine manganese nodules. Mineral Processing and Extractive Metallurgy Review, 1(1-2), 1-83
DOI: 10.1594/pangaea.864789
title: GDGT-based proxies of sediment core YD0903

description: We reconstruct the environmental evolution of the East China Sea in the past 14 kyr based on glycerol dialkyl glycerol tetraethers (GDGTs) in a sediment core from the subaqueous Yangtze River Delta. Two primary phases are recognized. Phase I (13.8-8 cal kyr BP) reflects a predominantly continental influence, showing distinctly higher concentrations of branched GDGTs (averaged 143 ng/g dry sediment weight, dsw) than isoprenoid GDGTs (averaged 36 ng/g dsw), high BIT index (branched vs. isoprenoid tetraethers) values (&gt;0.78) and a fluctuating GDGT-0/crenarchaeol ratio (R0/5, varied from 0.52 to 3.81). Within this interval, temporal increases of terrestrial and marine influence are attributed to Younger Dryas (YD) (ca. 12.9-12.2 cal kyr BP) cold event and melt-water pulse (MWP) -1B (11.5-11.1 cal kyr BP), respectively. The prominent transition from 8 to 7.9 cal kyr BP shows a sharp decrease in BIT index value (&lt;0.4) and increase in crenarchaeol, which marks the beginning of phase II. Afterwards, the proxies remain relatively constant, which indicates that phase II (7.9 cal kyr BP-present) is a shelf sedimentary environment with high stand of sea level. Overall, the BIT index in our record serves as a good marker for terrestrial influence at the site, and likely reflects the flooding history of the region. The TEX86 (TetraEther Index of tetraethers consisting of 86 carbons) proxy is not applicable in phase I because of an excess terrestrial influence; but it seems to be valid for revealing the annual SST in phase II (21.6±0.9°C, n=49). In contrast, the MBT'/CBT (Methylation of Branched Tetraethers and Cyclization of Branched Tetraethers) proxy appears to faithfully record the annual mean air temperature (MAT) (14.3±0.63°C, n=68) and presents an integrated signal over the middle and lower Yangtze River drainage basin.
description: This research was supported by the National Key Basic Research Program of China (Grant No. 2013CB955703), the National Natural Science Foundation of China (Grant No. 91028005), the China Geological Survey (Grant No. GZH201100203), the Fundamental Research Funds for the Central Universities, National Key Basic Research Program of China (Grant No. 2013CB429701), the "National Thousand Talents" Program through the State Key Laboratory of Marine Geology at Tongji University, the DFG to GJMV Heisenberg Grant (Grant No. VE486/2-2), and the Project of Shanghai Engineering Research Center of Hadal Science and Technology (Grant No. 14DZ2250900).
description: Supplement to: Ge, HuangMin; Zhang, ChuanLun; Versteegh, Gerard J M; Chen, LingLing; Fan, DaiDu; Dong, Liang; Liu, JingJing (2015): Evolution of the East China Sea sedimentary environment in the past 14 kyr: Insights from tetraethers-based proxies. Science China Earth Sciences, 59(5), 927-938