Auflistung Geophysik, Extraterrestische Forschung nach Titel
Anzeige der Dokumente 606-625 von 1211
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Machine Learning‐Based Prediction of Spatiotemporal Uncertainties in Global Wind Velocity Reanalyses
(Journal of Advances in Modeling Earth Systems, 2020-05-13)The characterization of uncertainties in geophysical quantities is an important task with widespread applications for time series prediction, numerical modeling, and data assimilation. In this context, machine learning is ... -
Macroporosity and Grain Density of Rubble Pile Asteroid (162173) Ryugu
(Journal of Geophysical Research: Planets, 2020-12-04)Rubble pile asteroids such as (162173) Ryugu have large bulk porosities, which are believed to result from void spaces in between the constituent boulders (macroporosity) as well as void spaces within the boulders themselves ... -
Magmatic Activity and Dynamics of Melt Supply of Volcanic Centers of Ultraslow Spreading Ridges: Hints From Local Earthquake Tomography at the Knipovich Ridge
(Geochemistry, Geophysics, Geosystems, 2022-10-07)Along ultraslow spreading ridges melt is distributed unequally, but melt focusing guides melt away from amagmatic segments toward volcanic centers. An interplay of tectonism and magmatism is thought to control melt ascent, ... -
Magmatic and Sedimentary Structure beneath the Klyuchevskoy Volcanic Group, Kamchatka, From Ambient Noise Tomography
(Journal of Geophysical Research: Solid Earth, 2020-03-14)The Klyuchevskoy Volcanic Group is a cluster of the world's most active subduction volcanoes, situated on the Kamchatka Peninsula, Russia. The volcanoes lie in an unusual off‐arc position within the Central Kamchatka ... -
Magnetic coupling of the solar photosphere and chromosphere
(Univ. Freiburg (Breisgau), 2008)The solar surface outside sunspots and active regions, i.e., the quiet Sun, shows the ubiquitous pattern of granulation in the photosphere. The quiet solar photosphere harbors small-scale magnetic structures inside and ... -
Magnetic Fields and Plasma Motions in a Hybrid Martian Magnetosphere
(Journal of Geophysical Research: Space Physics, 2023-01-04)The Martian magnetosphere contains elements of induced and intrinsic origin. To display them one must use different coordinate systems. Although the solar‐electric coordinate system (Mars Solar Electric [MSE]) adequately ... -
Magnetic Properties of Asteroid (162173) Ryugu
(Journal of Geophysical Research: Planets, 2020)Observations of the magnetization state of asteroids indicate diverse properties. Values between 1.9 × 10 −6 Am 2/kg (Eros) and 10 −2 Am 2/kg (Braille) have been reported. A more detailed understanding of asteroidal ... -
Magnetic Surveys With Unmanned Aerial Systems: Software for Assessing and Comparing the Accuracy of Different Sensor Systems, Suspension Designs and Compensation Methods
(Geochemistry, Geophysics, Geosystems, 2021-07-13)A typical problem for magnetic surveys with small Unmanned Aerial Systems (sUAS) is the heading error caused by undesired magnetic signals that originate from the aircraft. This can be addressed by suspending the magnetometers ... -
Magnetospheric Interactions of Saturn's Moon Dione (2005–2015)
(Journal of Geophysical Research: Space Physics, 2020)The moon Dione orbits Saturn at 6.2 Saturn radii RS deep in the Kronian magnetosphere. In situ studies of the moon-magnetosphere interaction processes near Dione were possible with the Cassini/Huygens mission which flew ... -
Magnetotelluric Apparent Resistivity Tensors for Improved Interpretations and 3-D Inversions
(Journal of Geophysical Research: Solid Earth, 2019)The complex magnetotelluric (MT) apparent resistivity tensor can be decomposed into two real tensors, the apparent resistivity and the resistivity phase tensors, which represent relationships between the observed electric ... -
Malaco temperature reconstructions and numerical simulation of environmental conditions in the southeastern Carpathian Basin during the Last Glacial Maximum
(Journal of Quaternary Science, 2021-05-05)We investigate the glacial climate conditions in the southeastern Carpathian Basin (Vojvodina, Serbia) based on the reconstruction of malacological palaeotemperatures and results from a high‐resolution regional climate ... -
Mantle and Crustal Sources of Magmatic Activity of Klyuchevskoy and Surrounding Volcanoes in Kamchatka Inferred From Earthquake Tomography
(Journal of Geophysical Research: Solid Earth, 2020-09-28)Klyuchevskoy and surrounding volcanoes in central Kamchatka form the Northern Group of Volcanoes (NGV), which is an area of particularly diverse and intensive Pleistocene‐Holocene volcanism. In this study, we present a new ... -
Mantle Anisotropy in NW Namibia From XKS Splitting: Effects of Asthenospheric Flow, Lithospheric Structures, and Magmatic Underplating
(Geophysical Research Letters, 2023-01-27)The presence of the Etendeka flood basalts in northwestern Namibia is taken as evidence for the activity of the Tristan da Cunha mantle plume during the continental breakup between Africa and South America. We investigate ... -
Mapping and assessment of land use, land cover using remote sensing and GIS in North Kordofan State, Sudan
(Univ. Dresden, 2006)Sudan as a Sahelian country faced numerous drought periods resulting in famine and mass immigration. Spatial data on dynamics of land use and land cover is scarce and/or almost nonexistent. The study area in the North ... -
Mapping and Understanding Patterns of Air Quality Using Satellite Data and Machine Learning
(Journal of Geophysical Research: Atmospheres, 2020)The quantification of factors leading to harmfully high levels of particulate matter (PM) remains challenging. This study presents a novel approach using a statistical model that is trained to predict hourly concentrations ... -
Mapping the Brightness of Ganymede's Ultraviolet Aurora Using Hubble Space Telescope Observations
(Journal of Geophysical Research: Planets, 2022-06-15)We analyze Hubble Space Telescope observations of Ganymede made with the Space Telescope Imaging Spectrograph between 1998 and 2017 to generate a brightness map of Ganymede's oxygen emission at 1,356 Å. Our Mercator projected ... -
Mapping the Thermal Structure of Southern Africa From Curie Depth Estimates Based on Wavelet Analysis of Magnetic Data With Uncertainties
(Geochemistry, Geophysics, Geosystems, 2021-11-16)Surface heat flow provides essential information on the thermal state and thickness of the lithosphere. Southern Africa is a mosaic of the best‐preserved and exposed crustal blocks, assembled in the early late Archean and ... -
Marine gravimetric and magnetic investigations within the area of the southeastern Mediterranean Sea and the northern section of Egypt
(Univ. Hamburg, 2004)The southeastern Mediterranean Sea and the northern section of Egypt constitutes one of the most complex tectonic areas in the Mediterranean. This study is an attempt to achieve a better understanding of tectonics, and ... -
Martian Atmospheric Spectral End‐Members Retrieval From ExoMars Thermal Infrared (TIRVIM) Data
(Journal of Geophysical Research: Planets, 2022-09-09)Key knowledge about planetary composition can be recovered from the study of thermal infrared spectral range datasets. This range has a huge diagnostic potential because it contains diagnostic absorptions from a planetary ... -
Mass distribution at the galactic centre
(Univ. Köln, 2005)In the framework of this PhD thesis, the study of the distribution of an extended mass close to the super-massive black hole (SMBH) at the centre of our Galaxy is addressed using observational data and theoretical modelling. ...