Anzeige der Dokumente 41-60 von 562

    • Authigenic and Detrital Carbonate Nd Isotope Records Reflect Pulses of Detrital Material Input to the Labrador Sea During the Heinrich Stadials 

      Filippova, AlexandraORCIDiD; Frank, MartinORCIDiD; Kienast, MarkusORCIDiD; Gutjahr, MarcusORCIDiD; Hathorne, Ed C.ORCIDiD; Hillaire‐Marcel, ClaudeORCIDiD (Paleoceanography and Paleoclimatology, 2023-01-28)
      Limited constraints on the variability of the deep‐water production in the Labrador Sea complicate reconstructions of the strength of the Atlantic Meridional Overturning Circulation (AMOC) during the Late Quaternary. Large ...
    • Data reduction for X‐ray serial crystallography using machine learning 

      Rahmani, Vahid; Nawaz, Shah; Pennicard, David; Setty, Shabarish Pala Ramakantha; Graafsma, Heinz (Journal of Applied Crystallography, 2023-01-24)
      Serial crystallography experiments produce massive amounts of experimental data. Yet in spite of these large‐scale data sets, only a small percentage of the data are useful for downstream analysis. Thus, it is essential ...
    • Machine learning for scattering data: strategies, perspectives and applications to surface scattering 

      Hinderhofer, Alexander; Greco, Alessandro; Starostin, Vladimir; Munteanu, Valentin; Pithan, Linus; Gerlach, Alexander; Schreiber, Frank (Journal of Applied Crystallography, 2023-01-24)
      Machine learning (ML) has received enormous attention in science and beyond. Discussed here are the status, opportunities, challenges and limitations of ML as applied to X‐ray and neutron scattering techniques, with an ...
    • Aluminum Components in Bridgmanite Coexisting With Corundum and the CF‐Phase With Temperature 

      Wang, LinORCIDiD; Liu, ZhaodongORCIDiD; Koizumi, SanaeORCIDiD; Ballaran, Tiziana BoffaORCIDiD; Katsura, TomooORCIDiD (Journal of Geophysical Research: Solid Earth, 2023-01-22)
      Abstract Phase relations in the MgSiO3–MgAl2O4–Al2O3 system are investigated at 27 GPa and 2000–2600 K using a multi‐anvil apparatus. The AlAlO3 content ...
    • Beam‐induced redox chemistry in iron oxide nanoparticle dispersions at ESRF–EBS 

      Thomä, Sabrina L. J.; Zobel, Mirijam (Journal of Synchrotron Radiation, 2023-01-13)
      The storage ring upgrade of the European Synchrotron Radiation Facility makes ESRF–EBS the most brilliant high‐energy fourth‐generation light source, enabling in situ studies with unprecedented time resolution. While ...
    • Combining reverse Monte Carlo analysis of X‐ray scattering and extended X‐ray absorption fine structure spectra of very small nanoparticles 

      Winterer, Markus; Geiß, Jeremias (Journal of Applied Crystallography, 2022-12-23)
      Finite size effects in partial pair distribution functions generate artefacts in the scattering structure factor and scattering intensity. It is shown how they can be overcome using a binned version of the Debye scattering ...
    • Riparian Microtopography Affects Event‐Driven Stream DOC Concentrations and DOM Quality in a Forested Headwater Catchment 

      Blaurock, KatharinaORCIDiD; Garthen, Phil; da Silva, Maria P.ORCIDiD; Beudert, BurkhardORCIDiD; Gilfedder, Benjamin S.ORCIDiD; Fleckenstein, Jan H.ORCIDiD; Peiffer, Stefan; Lechtenfeld, Oliver J.ORCIDiD; Hopp, LuisaORCIDiD (Journal of Geophysical Research: Biogeosciences, 2022-12-21)
      The transport of dissolved organic carbon (DOC) from the soils to inland waters plays an important role in the global carbon cycle. Widespread increases in DOC concentrations have been observed in surface waters over the ...
    • Small‐angle neutron scattering of long‐wavelength magnetic modulations in reduced sample dimensions 

      Causer, Grace L.; Chacon, Alfonso; Heinemann, André; Pfleiderer, Christian (Journal of Applied Crystallography, 2022-12-15)
      Magnetic small‐angle neutron scattering (SANS) is ideally suited to providing direct reciprocal‐space information on long‐wavelength magnetic modulations, such as helicoids, solitons, merons or skyrmions. SANS of such ...
    • Hydrogen Diffusion in Clinopyroxene at Low Temperatures (195°C–400°C) and Consequences for Subsurface Processes 

      Bissbort, ThiloORCIDiD; Lynn, Kendra J.; Becker, Hans‐WernerORCIDiD; Chakraborty, SumitORCIDiD (Geochemistry, Geophysics, Geosystems, 2022-12-12)
      Studying diffusion of hydrogen in nominally anhydrous minerals, like clinopyroxene, at low temperatures is a challenging task due to experimental and analytical difficulties. In this study, to overcome these problems we ...
    • Central Mediterranean tephrochronology between 313 and 366 ka: New insights from the Fucino palaeolake sediment succession 

      Leicher, NiklasORCIDiD; Giaccio, Biagio; Pereira, Alison; Nomade, Sebastien; Monaco, Lorenzo; Mannella, Giorgio; Galli, Paolo; Peronance, Edoardo; Palladino, Danilo Mauro; Sottili, Gianluca; Zanchetta, GiovanniORCIDiD; Wagner, BerndORCIDiD (Boreas, 2022-12-09)
      Thirty‐two tephra layers were identified in the time‐interval 313–366 ka (Marine Isotope Stages 9–10) of the Quaternary lacustrine succession of the Fucino Basin, central Italy. Twenty‐seven of these tephra layers yielded ...
    • Partial melting and reaction along deformation features in plagioclase 

      Incel, Sarah; Baïsset, MarieORCIDiD; Labrousse, Loïc; Schubnel, Alexandre (Journal of Metamorphic Geology, 2022-12-07)
      Geological processes involving deformation and/or reactions are highly influenced by the rock grain size, especially if diffusion‐controlled processes take place such as metamorphic reactions and diffusion creep. Although ...
    • Do Emergent Constraints on Carbon Cycle Feedbacks Hold in CMIP6? 

      Zechlau, SabrinaORCIDiD; Schlund, ManuelORCIDiD; Cox, Peter M.; Friedlingstein, Pierre; Eyring, VeronikaORCIDiD (Journal of Geophysical Research: Biogeosciences, 2022-12-05)
      Emergent constraints on carbon cycle feedbacks in response to warming and increasing atmospheric CO2 concentration have previously been identified in Earth system models participating in the Coupled Model ...
    • The Interface Between Magma and Earth's Atmosphere 

      Kuhn, J.ORCIDiD; Bobrowski, N.; Platt, U. (Geochemistry, Geophysics, Geosystems, 2022-12-01)
      Volatiles released from magma can form bubbles and leave the magma body to eventually mix with atmospheric air. The composition of those volatiles, as derived from measurements made after their emission, is used to draw ...
    • Modeling Viscosity of Volcanic Melts With Artificial Neural Networks 

      Langhammer, D.ORCIDiD; Di Genova, D.; Steinle‐Neumann, G.ORCIDiD (Geochemistry, Geophysics, Geosystems, 2022-12-01)
      Viscosity is of great importance in governing the dynamics of volcanoes, including their eruptive style. The viscosity of a volcanic melt is dominated by temperature and chemical composition, both oxides and water content. ...
    • Intrusive Magmatism Strongly Contributed to the Volatile Release Into the Atmosphere of Early Earth 

      Vulpius, SaraORCIDiD; Noack, LenaORCIDiD (Geochemistry, Geophysics, Geosystems, 2022-11-29)
      Magmatic volatile release was crucial for the build‐up and composition of the early atmosphere and thus for the origin and evolution of life. Even though the rate of intrusive to extrusive magma production on Earth is high, ...
    • Quantification of Impact‐Induced Melt Production in Numerical Modeling Revisited 

      Manske, LukasORCIDiD; Wünnemann, KaiORCIDiD; Kurosawa, KosukeORCIDiD (Journal of Geophysical Research: Planets, 2022-11-29)
      Melting and vaporization of rocks in impact cratering is mostly attributed to be a consequence of shock compression. However, other mechanism such as plastic work and decompression by structural uplift also contribute to ...
    • Geostandards and Geoanalytical Research Bibliographic Review 2021 

      Weis, UlrikeORCIDiD; Stoll, Brigitte; Hell, Katharina; Winkes, Elisa; Jochum, Klaus PeterORCIDiD (Geostandards and Geoanalytical Research, 2022-11-28)
      This GGR Bibliographic Review is a survey of approximately 5200 geoanalytical publications for the year 2021. Selected articles, numbering over 340, containing measurement results for relevant geological and environmental ...
    • Dissolved, Labile, and Total Particulate Trace Metal Dynamics on the Northeast Greenland Shelf 

      Chen, Xue‐Gang; Krisch, StephanORCIDiD; Al‐Hashem, AliORCIDiD; Hopwood, Mark James; Rutgers van der Loeff, Michiel M.ORCIDiD; Huhn, OliverORCIDiD; Lodeiro, PabloORCIDiD; Steffens, Tim; Achterberg, Eric P.ORCIDiD (Global Biogeochemical Cycles, 2022-11-28)
      We present high‐resolution profiles of dissolved, labile, and total particulate trace metals (TMs) on the Northeast Greenland shelf from GEOTRACES cruise GN05 in August 2016. Combined with radium isotopes, stable oxygen ...
    • The PERCIVAL detector: first user experiments 

      Correa, J.; Mehrjoo, M.; Battistelli, R.; Lehmkühler, F.; Marras, A.; Wunderer, C. B.; Hirono, T.; Felk, V.; Krivan, F.; Lange, S.; Shevyakov, I.; Vardanyan, V.; Zimmer, M.; Hoesch, M.; Bagschik, K.; Guerrini, N.; Marsh, B.; Sedgwick, I.; Cautero, G.; Stebel, L.; Giuressi, D.; Menk, R. H.; Greer, A.; Nicholls, T.; Nichols, W.; Pedersen, U.; Shikhaliev, P.; Tartoni, N.; Hyun, H. J.; Kim, S. H.; Park, S. Y.; Kim, K. S.; Orsini, F.; Iguaz, F. J.; Büttner, F.; Pfau, B.ORCIDiD; Plönjes, E.; Kharitonov, K.; Ruiz-Lopez, M.; Pan, R.; Gang, S.; Keitel, B.; Graafsma, H. (Journal of Synchrotron Radiation, 2022-11-25)
      The PERCIVAL detector is a CMOS imager designed for the soft X‐ray regime at photon sources. Although still in its final development phase, it has recently seen its first user experiments: ptychography at a free‐electron ...
    • Automatic bad‐pixel mask maker for X‐ray pixel detectors with application to serial crystallography 

      Sadri, Alireza; Hadian-Jazi, Marjan; Yefanov, Oleksandr; Galchenkova, Marina; Kirkwood, Henry; Mills, Grant; Sikorski, Marcin; Letrun, Romain; de Wijn, Raphael; Vakili, Mohammad; Oberthuer, Dominik; Komadina, Dana; Brehm, Wolfgang; Mancuso, Adrian P.; Carnis, Jerome; Gelisio, Luca; Chapman, Henry N. (Journal of Applied Crystallography, 2022-11-21)
      X‐ray crystallography has witnessed a massive development over the past decade, driven by large increases in the intensity and brightness of X‐ray sources and enabled by employing high‐frame‐rate X‐ray detectors. The ...