Auflistung Geophysik, Extraterrestische Forschung nach Titel
Anzeige der Dokumente 109-128 von 1211
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Architecture of tunnel valleys in the southeastern North Sea: new insights from high-resolution seismic imaging
(Journal of Quaternary Science, 2020)Tunnel valleys are assumed to form near the margin of ice sheets. Hence, they can be used to reconstruct the dynamics of former ice margins. The detailed formation and infill of tunnel valleys, however, are still not well ... -
Arctic Amplification of Precipitation Changes—The Energy Hypothesis
(Geophysical Research Letters, 2021-11-06)Temperature and precipitation change more strongly in the Arctic than at lower latitudes, with central Arctic boreal winter precipitation projected to double in the 21st century in a high‐emission scenario. This enhanced ... -
Arctic ocean–sea ice reanalysis for the period 2007–2016 using the adjoint method
(Quarterly Journal of the Royal Meteorological Society, 2021-03-04)We present an Arctic ocean–sea ice reanalysis covering the period 2007–2016 based on the adjoint approach of the Estimating the Circulation and Climate of the Ocean (ECCO) consortium. The spatiotemporal variation of Arctic ... -
Are Ocean Reanalyses Useful for Earth Rotation Research?
(Earth and Space Science, 2023-02-28)Oceanic circulation and mass‐field variability play important roles in exciting Earth's wobbles and length‐of‐day changes (ΔΛ), on time scales from days to several years. Modern descriptions of these effects employ oceanic ... -
Aspects of the magnetosphere-stellar wind interaction of close-in extrasolar planets
(Univ. Zugl.: Braunschweig, 2006)Since 1995, more than 150 extrasolar planets were detected, of which a considerable fraction orbit their host star at very close distances. Gas giants with orbital distances below 0.1 AU are called Hot Jupiters. Current ... -
Assessing Precipitation Over the Amazon Basin as Simulated by a Storm‐Resolving Model
(Journal of Geophysical Research: Atmospheres, 2023-02-11)In this study, we investigate whether a better representation of precipitation in the Amazon basin arises through an explicit representation of convection and whether it is related to the representation of organized systems. ... -
Assessing the fidelity of the marine sedimentary magnetic record - preservation and diagenetic alteration of magnetic mineral assemblages in upwelling regions off western Africa
(Univ. Bremen, 2008)Marine sediments, diagenesis, anoxic environments, paleomagnetism, low-temperature magnetism, magnetic Fe-Ti-Oxides. - Magnetic particles usually occur in very minor concentrations in igneous and sedimentary rocks, soils, ... -
Assessment of the Precision of Spectral Model Turbulence Analysis Techniques Using Direct Numerical Simulation Data
(Journal of Geophysical Research: Atmospheres, 2022-02-17)The spectral model turbulence analysis technique is widely used to derive kinetic energy dissipation rates of turbulent structures (ɛ) from different in situ measurements in the Earth's atmosphere. The essence of this ... -
Assimilating synthetic land surface temperature in a coupled land–atmosphere model
(Quarterly Journal of the Royal Meteorological Society, 2020)A realistic simulation of the atmospheric boundary layer (ABL) depends on an accurate representation of the land–atmosphere coupling. Land surface temperature (LST) plays an important role in this context and the assimilation ... -
Assimilating visible satellite images for convective-scale numerical weather prediction: A case-study
(Quarterly Journal of the Royal Meteorological Society, 2020)Satellite images in the visible spectral range contain high-resolution cloud information, but have not been assimilated directly before. This paper presents a case-study on the assimilation of visible Meteosat SEVIRI images ... -
Astrophysical phenomena related to supermassive black holes - searching for local particularities in the center of the Milky Way and extragalactic nuclei at high angular resolution
(Univ. Köln, 2006)All projects aim at pushing the limits of our knowledge about the interaction between a galaxy and a supermassive black hole (SMBH) at its center. The development of a new instrument can be as valuable as combining different ... -
Atmospheric and Oceanographic Signatures in the Ice Shelf Channel Morphology of Roi Baudouin Ice Shelf, East Antarctica, Inferred From Radar Data
(Journal of Geophysical Research: Earth Surface, 2020-07-09)Ice shelves around Antarctica can provide back stress for outlet glaciers and control ice sheet mass loss. They often contain narrow bands of thin ice termed ice shelf channels. Ice shelf channel morphology can be interpreted ... -
Atmospheric circulation patterns that trigger heavy rainfall in West Africa
(International Journal of Climatology, 2022-04-07)Classification of atmospheric circulation patterns (CP) is a common tool for downscaling rainfall, but it is rarely used for West Africa. In this study, a two‐step classification procedure is proposed for this region, which ... -
Atmospheric Contributions to Global Ocean Tides for Satellite Gravimetry
(Journal of Advances in Modeling Earth Systems, 2022-11-10)To mitigate temporal aliasing effects in monthly mean global gravity fields from the GRACE and GRACE‐FO satellite tandem missions, both tidal and non‐tidal background models describing high‐frequency mass variability in ... -
Atmospheric parameter retrieval from UV-vis-NIR limb scattering measurements
(Univ. Bremen, 2001)The hyperspectral UV-vis-NIR spectrometer SCIAMACHY will be launched aboard the European satellite Envisat. Its limb measurements will provide vertically resolved profiles of trace gases and other atmospheric parameters. ... -
Attribution of Observed Recent Decrease in Low Clouds Over the Northeastern Pacific to Cloud‐Controlling Factors
(Geophysical Research Letters, 2022-01-28)Marine low clouds cool the Earth's climate, with their coverage (LCC) being controlled by their environment. Here, an observed significant decrease of LCC in the northeastern Pacific over the past two decades is linked ... -
Aufbau, Optimierung und Charakterisierung der THz-Optik für GREAT auf SOFIA
(Univ. Köln, 2007)Sternentstehung findet im dichten Teil der Molekülwolken des interstellaren Mediums statt. In diesen Gebieten werden die ablaufenden physikalischen und chemischen Prozesse maßgeblich von der Wechselwirkung zwischen der ... -
August Heinrich Christian Gelpke - ein Astronom am Collegium Carolinum zu Braunschweig
(Univ. Braunschweig, 2005)Anhand der Biographie des Gymnasial- und Hochschullehrers August Heinrich Christian Gelpke (1769-1842) werden folgende Aspekte untersucht: Seine Auseinandersetzung mit der rasanten Entwicklung in den Naturwissenschaften, ... -
Auroral Arcs: The Fracture Theory Revisited
(Journal of Geophysical Research: Space Physics, 2021-01-15)The fracture theory for auroral arcs, developed by the author since 1980, compares the decoupling of the magnetic field from the ionosphere by the auroral acceleration region (AAR) with the breaking of a solid rod. In the ... -
Auswirkung magnetohydrodynamischer Turbulenz und Welle-Teilchen-Wechselwirkung in relativistischen Ausflüssen
(Univ. Bochum, 2004)In der vorliegenden Arbeit werden die Auswirkungen elektromagnetischer, sowie elektrostatischer Turbulenz speziell im Hinblick auf die Anwendung auf Jets aktiver galaktische Kerne untersucht. Dazu werden analytische Lösungen ...