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Now showing items 21-40 of 4290
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Limited utilization of extracted dissolved organic matter by prokaryotic communities from the subtropical North Atlantic
; ; ; ; (Limnology and Oceanography, 2021-05-06)
The ocean contains a large reservoir of dissolved organic matter (DOM) that persists for millennia. Both the very dilute concentrations of individual DOM molecules and intrinsic recalcitrance to microbial decay imparted ... -
Tackling the Challenge of Extracting Microplastics from Soils: A Protocol to Purify Soil Samples for Spectroscopic Analysis
(Environmental Toxicology and Chemistry, 2021-05-06)Microplastic pollution in soils is an emerging topic in the scientific community, with researchers striving to determine the occurrence and the impact of microplastics on soil health, ecology, and functionality. However, ... -
Carbonates from the ancient world's longest aqueduct: A testament of Byzantine water management
; ; ; ; Mertz‐Kraus, Regina (Geoarchaeology, 2021-05-06)
The fourth‐ and fifth‐century aqueduct system of Constantinople is, at 426 km, the longest water supply line of the ancient world. Carbonate deposits in the aqueduct system provide an archive of both archaeological ... -
Aquatic and terrestrial proxy evidence for Middle Pleistocene palaeolake and lake‐shore development at two Lower Palaeolithic sites of Schöningen, Germany
; Tucci, Mario; Urban, Brigitte; Pilgrim, Julien; Frenzel, Peter; Soulié‐Märsche, Ingeborg; Schwalb, Antje (Boreas, 2021-05-06)
The archaeological sites in the open‐cast mine of Schöningen, Germany, represent outstanding archives for understanding Middle Pleistocene interglacial–glacial transitions and human adaption. Aquatic microfossil and pollen ... -
Structural basis of chitin utilization by a GH20 β‐N‐acetylglucosaminidase from Vibrio campbellii strain ATCC BAA‐1116
(Acta Crystallographica Section D, 2021-05-05)Vibrio species play a crucial role in maintaining the carbon and nitrogen balance between the oceans and the land through their ability to employ chitin as a sole source of energy. This study describes the structural basis ... -
A systematic approach and software for the analysis of point patterns on river networks
; Molkenthin, Christian; (Earth Surface Processes and Landforms, 2021-05-05)
Many geomorphic phenomena such as bank failures, landslide dams, riffle‐pool sequences and knickpoints can be modelled as spatial point processes. However, as the locations of these phenomena are constrained to lie on or ... -
Mega‐scale glacial lineations formed by ice shelf grounding in the Canadian Beaufort Sea during multiple glaciations
; Dallimore, Scott; Wamsteeker, Michael; Taylor, Gary; King, Edward L.; Rohr, Kristin M. M.; Hong, Jong Kuk; Jin, Young Keun (Earth Surface Processes and Landforms, 2021-05-05)
Mega‐scale glacial lineations formed by the raking of ice shelves across the seafloor have been reported from multiple polar regions. Here, we present the first evidence of continental slope situated buried lineations in ... -
Improving crosshole ground‐penetrating radar full‐waveform inversion results by using progressively expanded bandwidths of the data
Zhou, Zhen; Klotzsche, Anja; (Near Surface Geophysics, 2021-05-05)
In the last decade, time‐domain crosshole ground‐penetrating radar full‐waveform inversion has been applied to several different test sites and has improved the resolution and reconstruction of subsurface properties. The ... -
Modeling urban regions: Comparing random forest and support vector machines for cellular automata
; ; Krelaus, Leonie; (Transactions in GIS, 2021-05-05)
Cellular automaton (CA) are important tools that provide insight into urbanization dynamics and possible future patterns. The calibration process is the core theme of these models. This study compares the performance of ... -
A cold pool perturbation scheme to improve convective initiation in convection‐permitting models
; (Quarterly Journal of the Royal Meteorological Society, 2021-05-04)
Cold pools originate from evaporation in precipitating downdraughts and spread as density currents at the surface. Vertical motion at the leading edge of the cold pool is an important trigger for new convective cells in ... -
Sedimentology of a Late Quaternary lacustrine record from the south‐eastern Carpathian Basin
; Hambach, Ulrich; Klasen, Nicole; ; ; ; ; Obreht, Igor; ; Papadopoulou, Maria; ; Schäbitz, Frank; Gavrilov, Milivoj B.; MarkoviĆ, Slobodan B.; Vött, Andreas; (Journal of Quaternary Science, 2021-05-04)
The Upper Pleistocene geoarchives in the south‐eastern Carpathian Basin are represented predominantly by loess–palaeosol records. In 2015, a 10 m sediment core composed of clay‐rich lacustrine sediments was recovered by ... -
Syn‐ and post‐eruptive gully formation near the Laacher See volcano
; Dotterweich, Markus; Fülling, Alexander; ; Broisch‐Höhner, Manuela; Totschnig, Ralf; Seren, Sirri; (Earth Surface Processes and Landforms, 2021-05-04)
The Laacher See volcano (LSV) is located at the western margin of the Neuwied Basin, the central part of the Middle Rhine Basin of Germany. Its paroxysmal Plinian eruption c. 13 ka ago (Laacher See event; LSE) deposited a ... -
Merging patterns and processes of diffuse pollution in urban watersheds: A connectivity assessment
(Wiley Interdisciplinary Reviews: Water, 2021-05-03)Urban diffuse pollution affects water resources as much as its rural counterpart does; however, it is considerably less studied. The full complexity of the urban landscape needs to be addressed to apprehend the diversity ... -
Geodynamic Modeling of Lithospheric Removal and Surface Deformation: Application to Intraplate Uplift in Central Mongolia
; Stein, Claudia; Becken, Michael; Hansen, Ulrich (Journal of Geophysical Research: Solid Earth, 2021-05-03)
Intraplate surface deformation is enigmatic and the underlying mechanisms responsible are not fully understood. We use thermo‐mechanical numerical modeling to explore the conditions under which lithospheric removal processes ... -
Anomalous SAXS at P12 beamline EMBL Hamburg: instrumentation and applications
(Journal of Synchrotron Radiation, 2021-05-02)Small‐angle X‐ray scattering (SAXS) is an established method for studying nanostructured systems and in particular biological macromolecules in solution. To obtain element‐specific information about the sample, anomalous ... -
Novel experimental setup for megahertz X‐ray diffraction in a diamond anvil cell at the High Energy Density (HED) instrument of the European X‐ray Free‐Electron Laser (EuXFEL)
(Journal of Synchrotron Radiation, 2021-05-02)The high‐precision X‐ray diffraction setup for work with diamond anvil cells (DACs) in interaction chamber 2 (IC2) of the High Energy Density instrument of the European X‐ray Free‐Electron Laser is described. This includes ... -
A Detailed, Multi‐Scale Assessment of an Atmospheric River Event and Its Impact on Extreme Glacier Melt in the Southern Alps of New Zealand
; ; ; ; ; (Journal of Geophysical Research: Atmospheres, 2021-05-02)
North‐westerly airflow and associated atmospheric rivers (ARs) have been found to profoundly influence New Zealand’s west coasts, by causing flooding, landslides and extreme ablation and accumulation on glaciers in the ... -
How do secondary iron enrichments form within basaltic eucrites? An experimental approach
Rombeck, Stella;; Roszjar, Julia; ; Klemme, Stephan (Meteoritics & Planetary Science, 2021-05-02)
Some basaltic eucrites and basaltic lithologies in howardites derived from the asteroid 4 Vesta exhibit unusual secondary veinlet textures consisting mostly of fayalitic olivine and Fe‐enrichments within pyroxenes. Recent ... -
Growth and Decay of Northwestern Tropical Atlantic Barrier Layers
; ; (Journal of Geophysical Research: Oceans, 2021-05-02)
The growth and decay mechanisms of barrier layers in the northwestern tropical Atlantic are studied by investigating small‐scale processes embedded in the regional circulation of the tropical Atlantic using output from an ... -
Improved understanding of dynamic water and mass budgets of high‐alpine karst systems obtained from studying a well‐defined catchment area
; Goeppert, Nadine; Goldscheider, Nico (Hydrological Processes, 2021-04-29)
Large areas of Europe, especially in the Alps, are covered by carbonate rocks and in many alpine regions, karst springs are important sources for drinking water supply. Because of their high variability and heterogeneity, ...