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  • PANGAEA  (7)
  • International Union of Crystallography  (3)
  • 2010-2014  (10)
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  • 1
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    Radiocarbon ages and diatom abundance in cores GA306-BC4 and GA306-GC4 obtained during Galathea 3 cruise, West Greenland (2012)
    PANGAEA
    In:  Supplement to: Sha, Longbin; Jiang, Hui; Knudsen, Karen Luise (2012): Diatom evidence of climatic change in Holsteinsborg Dyb, west of Greenland, during the last 1200 years. The Holocene, 22(3), 347-358, https://doi.org/10.1177/0959683611423684
    Details
    Publication Date: 2023-06-27
    Description: Diatom assemblages from Holsteinsborg Dyb on the West Greenland shelf were analysed with high temporal resolution for the last 1200 years. A high degree of consistency between changes in frequency of selected diatom species and instrumental data from the same area during the last 70 years confirms the reliability of diatoms (particularly sea-ice species and warm-water species) for the study of palaeoceanographic changes in this area. A general cooling trend with some fluctuations is marked by an increase in sea-ice species throughout the last 1200 years. A relatively warm period with increased influence of Atlantic water masses of the Irminger Current (IC) is found at AD 750-1330, although with some oceanographic variability after AD 1000. A pronounced oceanographic shift occurred at AD 1330, corresponding in time to the transition from the so-called 'Medieval Warm Period' (MWP) to the 'Little Ice Age' (LIA). The LIA cold episode is characterized by three intervals with particularly cold sea-surface conditions at AD 1330-1350, AD 1400-1575 and AD 1660-1710 as a result of variable influence of Polar waters in the area. During the last 70 years, two relatively warm periods and one cold period (the early 1960s to mid-1990s) are indicated by changes in the diatom components. Our study demonstrates that sedimentary records on the West Greenland shelf provide valuable palaeoenvironment data that confirm a linkage between local and large-scale North Atlantic oceanographic and atmospheric oscillations.
    Keywords: BC; Box corer; GA306-BC4; GA306-GC4; Galathea 3; GC; Gravity corer; Greenland Sea; HDMS Vaedderen
    Type: Dataset
    Format: application/zip, 3 datasets
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    DATA PANGAEA
  • 2
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    (Table 1) Radiocarbon ages and shell isotope ratios of sediment core GA306-GC4 obtained during Galathea 3 cruise (2012)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age, 14C AMS; Age, 14C calibrated, OxCal 4.1.3 (Ramsey, 2009; Radiocarbon, 51); Age, dated; Age, dated material; Age, dated standard deviation; Age, maximum/old; Age, minimum/young; Calendar age; DEPTH, sediment/rock; GA306-GC4; Galathea 3; GC; Gravity corer; Greenland Sea; HDMS Vaedderen; Sample ID; δ13C; δ18O
    Type: Dataset
    Format: text/tab-separated-values, 81 data points
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    DATA PANGAEA
  • 3
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    (Appendix 2) Diatom biostratigraphy of sediment core GA306-GC4 obtained during Galathea 3 cruise (2012)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Achnanthes minutissima; Achnanthes spp.; Actinocyclus curvatulus; Actinocyclus spp.; Amphora spp.; Amphora wisei; Asteromphalus hyalinus; Asteromphalus spp.; Bacillaria paxillifer; Bacterosira bathyomphala; Cocconeis costata; Cocconeis disculus; Cocconeis placentula; Cocconeis scutellum; Cocconeis spp.; Coscinodiscus spp.; Cyclotella spp.; Cymbella spp.; DEPTH, sediment/rock; Detonula confervacea; Diatoms indeterminata; Diploneis smithii; Diploneis spp.; Entomoneis spp.; Eunotia spp.; Fallacia litoricola; Fallacia spp.; Fossula arctica; Fragilaria pinnata; Fragilaria spp.; Fragilariopsis cylindrus; Fragilariopsis oceanica; Fragilariopsis spp.; GA306-GC4; Galathea 3; GC; Gomphonema exiguum var. minutissimum; Gomphonema spp.; Grammatophora angulosa; Gravity corer; Greenland Sea; Gyrosigma spp.; Hantzschia spp.; Haslea spp.; HDMS Vaedderen; Licmophora spp.; Navicula peregrina; Navicula spp.; Navicula starmachioides; Navicula vulpina; Nitzschia bacillum; Nitzschia bicapitata; Nitzschia inconspicua; Nitzschia spp.; Number; Odontella aurita; Opephora spp.; Paralia sulcata; Pauliella taeniata; Pinnularia spp.; Pleurosigma spp.; Pseudogomphonema spp.; Rhabdonema arcuatum; Rhizosolenia borealis; Rhizosolenia hebetata forma semispina; Rhizosolenia spp.; Rhoicosphenia spp.; Stauroneis spp.; Tabularia spp.; Thalassionema nitzschioides; Thalassiosira angulata; Thalassiosira antarctica; Thalassiosira antarctica var. borealis; Thalassiosira bulbosa; Thalassiosira constricta; Thalassiosira gracilis var. expecta; Thalassiosira hyalina; Thalassiosira nordenskioeldii; Thalassiosira oestrupii; Thalassiosira perpusilla; Thalassiosira poroseriata; Thalassiosira spp.; Thalassiosira trifulta; Thalassiothrix longissima; Tryblionella spp.
    Type: Dataset
    Format: text/tab-separated-values, 7821 data points
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    DATA PANGAEA
  • 4
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    (Appendix 1) Diatom biostratigraphy of sediment core GA306-BC4 obtained during Galathea 3 cruise (2012)
    PANGAEA
    Details
    Publication Date: 2023-07-09
    Keywords: Achnanthes minutissima; Achnanthes spp.; Actinocyclus spp.; Amphora spp.; Asteromphalus spp.; Bacillaria paxillifer; Bacterosira bathyomphala; BC; Box corer; Caloneis spp.; Cocconeis costata; Cocconeis scutellum; Cocconeis spp.; Coscinodiscus marginatus; Cyclotella spp.; Cymbella spp.; Denticula spp.; DEPTH, sediment/rock; Detonula confervacea; Diploneis spp.; Entomoneis spp.; Eunotia spp.; Fallacia spp.; Fossula arctica; Fragilaria spp.; Fragilariopsis cylindrus; Fragilariopsis oceanica; Fragilariopsis reginae-jahniae; GA306-BC4; Galathea 3; Gomphonema exiguum var. minutissimum; Gomphonema spp.; Grammatophora angulosa; Greenland Sea; Gyrosigma spp.; Haslea spp.; HDMS Vaedderen; Meridion circulare; Navicula aff. pseudotenelloides; Navicula kariana; Navicula oestrupii; Navicula peregrina; Navicula spp.; Navicula starmachioides; Navicula transitans; Nitzschia bicapitata; Nitzschia inconspicua; Nitzschia spp.; Number; Odontella aurita; Opephora spp.; Pauliella taeniata; Pinnularia spp.; Rhizosolenia hebetata forma semispina; Rhizosolenia spp.; Rhoicosphenia spp.; Stauroneis spp.; Synedra spp.; Tabularia spp.; Thalassionema nitzschioides; Thalassiosira antarctica; Thalassiosira antarctica var. borealis; Thalassiosira bulbosa; Thalassiosira constricta; Thalassiosira hyalina; Thalassiosira nordenskioeldii; Thalassiosira oestrupii; Thalassiosira perpusilla; Thalassiosira poroseriata; Thalassiosira spp.; Thalassiosira trifulta; Thalassiothrix longissima; Tryblionella spp.
    Type: Dataset
    Format: text/tab-separated-values, 1206 data points
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    DATA PANGAEA
  • 5
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    Diatom biostratigraphy and sea ice concentration reconstruction from core DA06-139G, Vaigat Strait in Disko Bugt, West Greenland (2012)
    PANGAEA
    In:  Supplement to: Sha, Longbin; Jiang, Hui; Seidenkrantz, Marit-Solveig; Knudsen, Karen Luise; Olsen, Jesper; Kuijpers, Antoon; Liu, Y (2014): A diatom-based sea-ice reconstruction for the Vaigat Strait (Disko Bugt, West Greenland) over the last 5000yr. Palaeogeography, Palaeoclimatology, Palaeoecology, 403, 66-79, https://doi.org/10.1016/j.palaeo.2014.03.028
    Details
    Publication Date: 2024-04-29
    Description: A diatom-based sea-ice concentration (SIC) transfer function is developed using 72 surface samples from west of Greenland and around Iceland, and through comparison with the associated modern SIC. Canonical correspondence analysis on surface sediment diatoms and monthly average of SIC reveals that April SIC is the most important environmental factor controlling the distribution of diatoms in the area, and permits the development of a diatom-based SIC transfer function. The consistency between reconstructed SIC based on diatoms from West Greenland and the instrumental and documentary data during the last ~75 years demonstrates that the diatom-based SIC reconstruction is reliable for studying the palaeoceanography off West Greenland. Relatively warm conditions with strong influence of the Irminger Current (IC) are indicated for the early part of the record (~5000-3860 cal. yr BP), corresponding in time to the latest part of the Holocene Thermal Maximum. The April SIC oscillated around the mean value between 3860 and 1510 cal. yr BP and was above mean afterwards, particularly during the time interval 1510-1120 cal. yr BP and after 650 cal. yr BP, indicating more extensive sea-ice cover in Disko Bugt. A high degree of consistency between the reconstructed April SIC and changes in the diatom species suggests that the sea-ice condition in Disko Bugt is strongly influenced by variations in the relative strength of two components of the West Greenland Current, i.e. the cold East Greenland Current and the relatively warm IC.
    Keywords: Climate Change: Learning from the past climate; DA06-139G; GC; Gravity corer; Past4Future; Vaigat Strait, West Greenland
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 6
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    Diatom biostratigraphy and age of sediment core DA06-139G obtained during DANA cruise in 2006 (2012)
    PANGAEA
    Details
    Publication Date: 2024-04-29
    Keywords: Achnanthes minutissima; Achnanthes spp.; Actinocyclus curvatulus; Actinocyclus spp.; Age model; Amphora ovalis; Amphora spp.; Bacillaria paxillifer; Bacterosira bathyomphala; Berkeleya rutilans; Climate Change: Learning from the past climate; Cocconeis costata; Cocconeis disculus; Cocconeis scutellum; Cocconeis spp.; Coscinodiscus spp.; Cymbella spp.; DA06-139G; DEPTH, sediment/rock; Detonula confervacea; Diploneis litoralis var. clathrata; Diploneis spp.; Fallacia spp.; Fossula arctica; Fragilaria spp.; Fragilariopsis cylindrus; Fragilariopsis oceanica; Fragilariopsis reginae-jahniae; GC; Gomphonema exiguum var. minutissimum; Gomphonema spp.; Grammatophora angulosa; Gravity corer; Gyrosigma spp.; Hantzschia spp.; Navicula kariana var. frigida; Navicula spp.; Neodenticula seminae; Nitzschia spp.; Number; Odontella aurita; Paralia sulcata; Past4Future; Pauliella taeniata; Pleurosigma spp.; Rhabdonema arcuatum; Rhizosolenia borealis; Rhizosolenia hebetata forma semispina; Rhizosolenia spp.; Rhoicosphenia spp.; Tabularia spp.; Tabularia tabulata; Thalassionema nitzschioides; Thalassiosira anguste-lineata; Thalassiosira antarctica; Thalassiosira antarctica var. borealis; Thalassiosira bulbosa; Thalassiosira constricta; Thalassiosira hyalina; Thalassiosira nordenskioeldii; Thalassiosira oestrupii; Thalassiosira pacifica; Thalassiosira spp.; Thalassiothrix longissima; Vaigat Strait, West Greenland
    Type: Dataset
    Format: text/tab-separated-values, 5310 data points
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  • 7
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    Sea ice concentrations reconstructed from sediment core DA06-139G, DANA 2006 cruise (2012)
    PANGAEA
    Details
    Publication Date: 2024-04-29
    Keywords: Age model; Climate Change: Learning from the past climate; DA06-139G; DEPTH, sediment/rock; GC; Gravity corer; Ice coverage; Number; Past4Future; Vaigat Strait, West Greenland
    Type: Dataset
    Format: text/tab-separated-values, 270 data points
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  • 8
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    6-Bromo-4-[(3-chloro-4-methylphenyl)iminomethyl]-2-methoxy-3-nitrophenol (2012)
    International Union of Crystallography
    Details
    Publication Date: 2012-06-13
    Electronic ISSN: 1600-5368
    Topics: Chemistry and Pharmacology , Geosciences
    Published by International Union of Crystallography
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    PAPER CURRENT
  • 9
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    4-(4-Pyridyl)pyridinium pentaaqua(pyridazine-4,5-dicarboxylato)praseodymate(III) (2010)
    International Union of Crystallography
    Details
    Publication Date: 2010-09-25
    Electronic ISSN: 1600-5368
    Topics: Chemistry and Pharmacology , Geosciences
    Published by International Union of Crystallography
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  • 10
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    Interface characterization of B4C-based multilayers by X-ray grazing-incidence reflectivity and diffuse scattering (2013)
    International Union of Crystallography
    Details
    Publication Date: 2013-03-20
    Description: B4C-based multilayers have important applications for soft to hard X-rays. In this paper, X-ray grazing-incidence reflectivity and diffuse scattering, combining various analysis methods, were used to characterize the structure of B4C-based multilayers including layer thickness, density, interfacial roughness, interdiffusion, correlation length,etc.Quantitative results for W/B4C, Mo/B4C and La/B4C multilayers were compared. W/B4C multilayers show the sharpest interfaces and most stable structures. The roughness replications of La/B4C and Mo/B4C multilayers are not strong, and oxidations and structure expansions are found in the aging process. This work provides guidance for future fabrication and characterization of B4C-based multilayers.
    Print ISSN: 0909-0495
    Electronic ISSN: 1600-5775
    Topics: Geosciences , Physics
    Published by International Union of Crystallography
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