Auflistung Geophysik, Extraterrestische Forschung nach Titel
Anzeige der Dokumente 791-810 von 1211
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Plasmoids in the Jovian Magnetotail: Statistical Survey of Ion Acceleration Using Juno Observations
(Journal of Geophysical Research: Space Physics, 2022-08-18)Transient magnetic reconnection plays an important role in energetic particle acceleration in planetary magnetospheres. Jupiter's magnetosphere provides a unique natural laboratory to study processes of energy transport ... -
Polar Stratospheric Clouds: Satellite Observations, Processes, and Role in Ozone Depletion
(Reviews of Geophysics, 2021-06-10)Polar stratospheric clouds (PSCs) play important roles in stratospheric ozone depletion during winter and spring at high latitudes (e.g., the Antarctic ozone hole). PSC particles provide sites for heterogeneous reactions ... -
Polarimetric remote sensing of land and snow/ice covers with the Spaceborne Microwave Radiometer WindSat
(Univ. Bremen, 2007)Microwave remote sensing, polarimetry, radiometer, WindSat, passive. - Measurements from spaceborne microwave radiometers, such as the Scanning Multichannel Microwave Radiometer (SMMR), the Special Sensor Microwave/Imager ... -
Poleward Shift of Northern Subtropics in Winter: Time of Emergence of Zonal Versus Regional Signals
(Geophysical Research Letters, 2020)The Northern Hemisphere mid-latitudes will be exposed to hydroclimatic risk in next coming decades because the subtropical expansion. However, it is not clear when the anthropogenic signal will emerge from the internal ... -
Pore Space Topology Controls Ultrasonic Waveforms in Dry Volcanic Rocks
(Geophysical Research Letters, 2022-09-15)Pore space controls the mechanical and transport properties of rocks. At the laboratory scale, seismic modeling is usually performed in relatively homogeneous settings, and the influence of the pore space on the recorded ... -
Positionierung und aktive Optik des Hexapod-Teleskops
(Univ. Bochum, 2007)Das Hexapod-Teleskop vereinigt zahlreiche innovative Ideen im Teleskopbau, die von industrieller Seite allerdings nie in einem astronomischen Betrieb getestet wurden. Obwohl die einzelnen Komponenten der Mechanik und Optik ... -
Potential and Limitations of Machine Learning for Modeling Warm‐Rain Cloud Microphysical Processes
(Journal of Advances in Modeling Earth Systems, 2020-11-30)The use of machine learning based on neural networks for cloud microphysical parameterizations is investigated. As an example, we use the warm‐rain formation by collision‐coalescence, that is, the parameterization of ... -
Potential for Early Forecast of Moroccan Wheat Yields Based on Climatic Drivers
(Geophysical Research Letters, 2020)Wheat production plays an important role in Morocco. Current wheat forecast systems use weather and vegetation data during the crop growing phase, thus limiting the earliest possible release date to early spring. However, ... -
Potential Links Between Tropospheric and Stratospheric Circulation Extremes During Early 2020
(Journal of Geophysical Research: Atmospheres, 2022-02-07)February‐March 2020 was marked by highly anomalous large‐scale circulations in the Northern extratropical troposphere and stratosphere. The Atlantic jet reached extreme strength, linked to some of the strongest and most ... -
Potential of millimeter- and submillimeter-wave satellite observations for hydrometeor studies
(Univ. Köln, 2008)The distribution of hydrometeors is highly variable in space and time, since it is the result of a complex chain of processes with scales from microphysical (1e-6 m) to synoptical (1e3 m). It is a challenging task to observe ... -
Precipitation Over Southern Africa: Moisture Sources and Isotopic Composition
(Journal of Geophysical Research: Atmospheres, 2022-11-03)Southern Africa, with its vast arid to semiarid areas, is considered vulnerable to precipitation changes and amplifying weather extremes. However, during the last 100 ka, huge lakes existed in the currently dry central ... -
Precise point positioning with GPS and Galileo broadcast ephemerides
(GPS Solutions, 2021-03-27)For more than 20 years, precise point positioning (PPP) has been a well-established technique for carrier phase-based navigation. Traditionally, it relies on precise orbit and clock products to achieve accuracies in the ... -
Predicting Convective Downdrafts From Updrafts and Environmental Conditions in a Global Storm Resolving Simulation
(Journal of Advances in Modeling Earth Systems, 2023-03-02)One important component of precipitating convection is the formation of convective downdrafts. They can terminate the initial updraft, affect the mean properties of the boundary layer, and cause strong winds at the surface. ... -
Predicting Geothermal Heat Flow in Antarctica With a Machine Learning Approach
(Journal of Geophysical Research: Solid Earth, 2021-06-10)We present a machine learning approach to statistically derive geothermal heat flow (GHF) for Antarctica. The adopted approach estimates GHF from multiple geophysical and geological data sets, assuming that GHF is substantially ... -
Predicting Imminence of Analog Megathrust Earthquakes With Machine Learning: Implications for Monitoring Subduction Zones
(Geophysical Research Letters, 2020-03-31)Subduction zones are monitored using space geodesy with increasing resolution, with the aim of better capturing the deformation accompanying the seismic cycle. Here, we investigate data characteristics that maximize the ... -
Predictions of planets for 586 exosystems and a method for predicting planets in multi-planetary exosystems
(2019)We have applied a model of planetary system formation in the field of a standing sound wave (the ‘SSW-Model’) to the prediction of planets in 586 multi-planetary exosystems (384 biplanetary, 127 tri-planetary and 75 ... -
Predictions of the geomagnetic secular variation based on the ensemble sequential assimilation of geomagnetic field models by dynamo simulations
(Earth, Planets and Space, 2020-10-22)The IGRF offers an important incentive for testing algorithms predicting the Earth’s magnetic field changes, known as secular variation (SV), in a 5-year range. Here, we present a SV candidate model for the 13th IGRF that ... -
Prehistoric chamber tombs or geological pitfall? A multimethod case study from Ancient Aigeira with a focus on seismic full‐waveform inversion
(Archaeological Prospection, 2021-07-16)We show an extensive multimethod geophysical study of focusing on some enigmatic subsurface structures found at Ancient Aigeira (N Peloponnes, Greece) that could be interpreted either as prehistoric chamber tombs or complex ... -
Preliminary Statistical Comparisons of Spin‐Averaged Electron Data From Arase and Van Allen Probes Instruments
(Journal of Geophysical Research: Space Physics, 2021-07-06)Following the end of the Van Allen Probes mission, the Arase satellite offers a unique opportunity to continue in‐situ radiation belt and ring current particle measurements into the next solar cycle. In this study we compare ... -
Present and early star formation - a study on rotational and thermal properties
(Univ. Potsdam, 2006)We investigate the rotational and thermal properties of star-forming molecular clouds using hydrodynamic simulations. Stars form from molecular cloud cores by gravoturbulent fragmentation. Understanding the angular momentum ...