Auflistung Geophysik, Extraterrestische Forschung nach Titel
Anzeige der Dokumente 65-84 von 1223
-
Acceleration and spatial diffusion of galactic cosmic rays
(Univ. Bochum, 2005)In the present work analytical solutions of the transport equation for hadronic cosmic rays are calculated. With these, it is possible for the first time to fit the energy spectra of the cosmic protons measured at the ... -
Accretion and emission close to supermassive black holes in quasars and AGN - Modeling the UV-X-spetrum
(Univ. Hamburg, 2006)With the last generation of X-ray satellites, such as XMM-Newton and Chandra, our knowledge about the X-ray properties of Active Galactic Nuclei (AGN) has greatly improved. Detailed spectroscopy and long-term observations ... -
Accretion, winds and jets - high-energy emission from young stellar objects
(Univ. Hamburg, 2009)This thesis deals with the high-energy emission from young stellar objects, which are on the one hand still actively accreting from their disk, and on the other hand are no longer deeply obscured by their natal cloud. Stars ... -
Accuracy of fully coupled and sequential approaches for modeling hydro- and geomechanical processes
; ; ;
(Computational Geosciences, 2020-07-12)
Subsurface flow and geomechanics are often modeled with sequential approaches. This can be computationally beneficial compared with fully coupled schemes, while it requires usually compromises in numerical accuracy, at ... -
Accuracy of sand beach topography surveying by drones and photogrammetry
; ; ; ; (Geo-Marine Letters, 2020-01-23)
Beaches are characterized by high morphodynamic activity, and high-frequency measurements are needed to understand their states and rates of change. Ideally, beach survey methods should be at once accurate, rapid and ... -
Added value of an atmospheric circulation pattern‐based statistical downscaling approach for daily precipitation distributions in complex terrain
; ; ; (International Journal of Climatology, 2023-06-10)
Abstract Reliable prediction of heavy precipitation events causing floods in a world of changing ...
-
Advanced methods for analysing and modelling multivariate palaeoclimatic time series
(Univ. Potsdam, 2007)The separation of natural and anthropogenically caused climatic changes is an important task of contemporary climate research. For this purpose, a detailed knowledge of the natural variability of the climate during warm ... -
Aerosol-Cloud-Precipitation Interactions in the Context of Convective Self-Aggregation
; (Journal of Advances in Modeling Earth Systems, 2019)
We investigate the sensitivity of self-aggregated radiative-convective-equilibrium cloud-resolving model simulations to the cloud condensation nuclei (CCN) concentration. Experiments were conducted on a long (2,000-km × 120-km) ... -
Age Uncertainty in Recurrence Analysis of Paleoseismic Records
; (Journal of Geophysical Research: Solid Earth, 2021-08-07)
Determining the aperiodicity of large earthquake recurrences is key to forecast future rupture behavior. Aperiodicity is classically expressed as the coefficient of variation of recurrence intervals, though the recent trend ... -
Airborne and ground level flask sampling for regional carbon budgets - the potential of multiple tracer and isotope analyses ; development of a new "Investigation Strategy" and of an improved "Sampling System"
(Univ. Hamburg, 2005)Aim of the study was to test the capability of multiple trace gas analyses for the assessment of regional carbon budgets. Therefore, air samples were taken by airborne and ground level activities during several field ... -
Airborne-based geophysical investigation in Dronning Maud Land, Antarctica
(Univ. Bremen, 2008)Antarctica represents a key component in the investigation of the geological history and reconstruction of the supercontinents Rodinia and Gondwana. Remnants of the formation and disintegration of these former land masses ... -
Air‐Sea Interactions and Water Mass Transformation During a Katabatic Storm in the Irminger Sea
; ; ; ; (Journal of Geophysical Research: Oceans, 2022-04-28)
We use a global 5‐km resolution model to analyze the air‐sea interactions during a katabatic storm in the Irminger Sea originating from the Ammassalik valleys. Katabatic storms have not yet been resolved in global climate ... -
Aktive Regionen der Sonnenoberfläche und ihre zeitliche Variation in zweidimensionaler Spektro-Polarimetrie
(Univ. Potsdam, 2008)Die Arbeit beschreibt die Analyse von Beobachtungen zweier Sonnenflecken in zweidimensionaler Spektro-Polarimetrie. Die Daten wurden mit dem Fabry-Pérot-Interferometer der Universität Göttingen am Vakuum-Turm-Teleskop auf ... -
Aktivitätskoeffizienten von Si und Cr in Fe-Ni-Legierungen und ihre Relevanz für die Thermodynamik planetarer Differentiationsprozesse
(Univ. Köln, 2005)Die Erde und viele andere planetare Körper besitzen Eisennickel-Kerne. Diese resultieren aus einer zumindest partiellen Aufschmelzung in der Frühphase ihrer Geschichte. Durch die Gravitation hat sich dabei das schwerere ... -
Akusto-optische Signalverarbeitung mit dem Material Rutil
(Univ. Köln, 2006)In der Radioastronomie und in der Atmosphärenforschung erlauben moderne Heterodyn-Empfangssysteme die Beobachtung von Atom- und Molekülübergangslinien mit ZF-Bandbreiten von bis zu 4 GHz. Zur Abdeckung dieser großen ... -
Algorithmic Differentiation for Sensitivity Analysis in Cloud Microphysics
; ; ; (Journal of Advances in Modeling Earth Systems, 2022-07-12)
The role of clouds for radiative transfer, precipitation formation, and their interaction with atmospheric dynamics depends strongly on cloud microphysics. The parameterization of cloud microphysical processes in weather ... -
Alternating Emission Features in Io's Footprint Tail: Magnetohydrodynamical Simulations of Possible Causes
; (Journal of Geophysical Research: Space Physics, 2022-04-28)
Io's movement relative to the plasma in Jupiter's magnetosphere creates Alfvén waves propagating along the magnetic field lines which are partially reflected along their path. These waves are the root cause for auroral ... -
Alternating North‐South Brightness Ratio of Ganymede's Auroral Ovals: Hubble Space Telescope Observations Around the Juno PJ34 Flyby
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; (Geophysical Research Letters, 2022-12-12)
We report results of Hubble Space Telescope observations from Ganymede's orbitally trailing side which were taken around the flyby of the Juno spacecraft on 7 June 2021. We find that Ganymede's northern and southern auroral ... -
An ambitious new mission seeks the origin of the moons of Mars
(Proceedings of the National Academy of Sciences, 2023)Two mysterious moons whirl around Mars. Despite the many missions to the planet, not a single one has focused on its satellites — or, rather, not a single successful one. Three previous Martian moon explorers, launched by ... -
An adaptive shallow water model on the sphere
(Univ. Bremen, 2009)
This thesis describes the adaptive shallow water model PLASMA-FEMmE. It solves on the sphere the shallow water equations, the prototype for partial differential equations in atmospheric modeling, using a semi-implicit ...
