Auflistung Geophysik, Extraterrestische Forschung nach Titel
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D" Reflection Polarities Inform Lowermost Mantle Mineralogy
(Geochemistry, Geophysics, Geosystems, 2022-10-04)Polarities of seismic reflections at the discontinuity atop the D" region (PdP and SdS) indicate the sign of the velocity contrast across the D" reflector. Recent studies found PdP polarities matching and opposite those ... -
Data analysis of continuous gravitational waves
(Univ. Potsdam, 2008)This thesis describes two main projects; the first one is the optimization of a hierarchical search strategy to search for unknown pulsars. This project is divided into two parts; the first part (and the main part) is the ... -
Data assimilation in a regional finite element sea-ice model for the Arctic - application of the singular evolutive interpolated Kalman filter
(Univ. Bremen, 2008)Sea-ice, Finite Element Sea-Ice Model, Kalman Filter, Data Assimilation. - The Arctic region is sensitive to climate change. Since the Arctic sea-ice cover influences the surface heat budget of the Earth the observed sea-ice ... -
Data‐Driven Medium‐Range Weather Prediction With a Resnet Pretrained on Climate Simulations: A New Model for WeatherBench
(Journal of Advances in Modeling Earth Systems, 2021-02-16)Numerical weather prediction has traditionally been based on the models that discretize the dynamical and physical equations of the atmosphere. Recently, however, the rise of deep learning has created increased interest ... -
Deciphering the Whisper of Volcanoes: Monitoring Velocity Changes at Kamchatka's Klyuchevskoy Group With Fluctuating Noise Fields
(Journal of Geophysical Research: Solid Earth, 2023-03-30)Volcanic inflation and deflation often precede eruptions and can lead to seismic velocity changes (dv/v $dv/v$) in the subsurface. Recently, interferometry on the coda of ambient noise‐cross‐correlation functions yielded ... -
Deep Emulators for Differentiation, Forecasting, and Parametrization in Earth Science Simulators
(Journal of Advances in Modeling Earth Systems, 2021-06-28)To understand and predict large, complex, and chaotic systems, Earth scientists build simulators from physical laws. Simulators generalize better to new scenarios, require fewer tunable parameters, and are more interpretable ... -
Deep exploration using long-offset transient electromagnetics: interpretation of field data in time and frequency domain
(Geophysical Prospecting, 2020)In the framework of the Deep Electromagnetic Soundings for Mineral Exploration project, we conducted ground-based long-offset transient-electromagnetic measurements in a former mining area in eastern Thuringia, Germany. ... -
Deep Learning Based Cloud Cover Parameterization for ICON
(Journal of Advances in Modeling Earth Systems, 2022-12-14)A promising approach to improve cloud parameterizations within climate models and thus climate projections is to use deep learning in combination with training data from storm‐resolving model (SRM) simulations. The ICOsahedral ... -
DeepLandforms: A Deep Learning Computer Vision Toolset Applied to a Prime Use Case for Mapping Planetary Skylights
(Earth and Space Science, 2023-01-04)Thematic map creation is a meticulous process that requires several steps to be accomplished regardless of the type of map to be produced, from data collection, through data exploitation and map publication in print, image, ... -
Deformation and micromechanics of granular materials in shear zones - investigated with the Discrete Element Method
(Univ. Bremen, 2007)Deformation, shear zone, granular, micromechanic, numerical model, discrete element method, distinct element method. - This thesis was inspired by the lack of detailed (i.e. particle scale) knowledge concerning deformation ... -
Deformation Memory in the Lithosphere: A Comparison of Damage‐dependent Weakening and Grain‐Size Sensitive Rheologies
(Journal of Geophysical Research: Solid Earth, 2021-01-04)Strain localization in the lithosphere and the formation, evolution, and maintenance of resulting plate boundaries play a crucial role in plate tectonics and thermo‐chemical mantle convection. Previously activated lithospheric ... -
Deformation microstructures - Antarctic Ice from EPICA Dronning Maud Land and artificial creep test Ice
(Univ. Bremen, 2007)Ice, microstructures, subgrain boundaries, recrystallization, flow, deformation. - The primary objective of this thesis is the investigation of microstructures obtained from samples from the EPICA Dronning Maud Land ice ... -
Degradation of Small Simple and Large Complex Lunar Craters: Not a Simple Scale Dependence
(Journal of Geophysical Research: Planets, 2020-04-20)The crater record of a planetary surface unit is often analyzed by its cumulative size‐frequency distribution (CSFD). Measuring CSFDs involves traditional approaches, such as traditional crater counting (TCC) and buffered ... -
Delayed and Sustained Remote Triggering of Small Earthquakes in the San Jacinto Fault Region by the 2014 Mw 7.2 Papanoa, Mexico Earthquake
(Geophysical Research Letters, 2019)We apply a move max matched-filter method to detect heightened seismicity triggered in the San Jacinto fault (SJF) zone, by the 2014 Mw 7.2 Papanoa, Mexico earthquake. The move max matched filter detects 5.4 and 1.7 times ... -
Den Tsunami verstehen - die Bedeutung geographischer Bildungsarbeit als Teil katastrophenpräventiver Maßnahmen am Beispiel des Tsunami Education Project (TEP) in Sri Lanka nach dem Tsunami 2004 im Indischen Ozean
(Univ. Bochum, 2009)Die Arbeit nimmt Bezug auf die Diskussion über die Bedeutung von Katastrophenvorsorge in der deutschen humanitären Hilfe und Entwicklungszusammenarbeit vor und nach katastrophalen Naturereignissen. Im Mittelpunkt steht die ... -
Deposition History and Paleo-Current Activity on the Southeastern Lomonosov Ridge and its Eurasian Flank Based on Seismic Data
(Geochemistry, Geophysics, Geosystems, 2020)A regional seismic survey on the southeastern Lomonosov Ridge (LR) and adjacent basins provides constraints on the coupled evolution of ocean circulations, depositional regime, and tectonic processes. First, Mesozoic strata ... -
Depth‐Varying Friction on a Ramp‐Flat Fault Illuminated by ∼3‐Year InSAR Observations Following the 2017 Mw 7.3 Sarpol‐e Zahab Earthquake
(Journal of Geophysical Research: Solid Earth, 2022-12-01)We use interferometric synthetic aperture radar observations to investigate the fault geometry and afterslip evolution within 3 years after a mainshock. The postseismic observations favor a ramp‐flat structure in which the ... -
Der Einfluß externen Rauschens auf die Klimavariabilität in vereinfachten Modellen
(Univ. Hamburg, 2000) -
Design and analysis of a broadband SIS-mixer for the Heterodyne Instrument for the Far Infrared (HIFI) on the Herschel Space Observatory
(Univ. Köln, 2006)In this thesis the design and analysis of SIS-mixers (SIS: superconductor-isolator-superconductor) for the use as low-noise and broad-band detectors in the submm-region for astronomical observations is described. The ... -
Detailed atmospheric ice accretion surface measurement using micro-computed tomography
(Atmospheric Science Letters, 2020)Surfaces exposed to atmospheric cold temperature and humid environments are prone to ice accretion. Airplanes, electrical power transmission cables, and wind turbines are typical examples for which icing has to be considered. ...