Auflistung Geophysik, Extraterrestische Forschung nach Titel
Anzeige der Dokumente 49-68 von 1221
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A seamless filter for daily to seasonal forecasts, with applications to Iran and Brazil
(Quarterly Journal of the Royal Meteorological Society, 2019)A digital filter is introduced which treats the problem of predictability versus time averaging in a continuous, seamless manner. This seamless filter (SF) is characterized by a unique smoothing rule that determines the ... -
A Seismic Approach to Flood Detection and Characterization in Upland Catchments
(Geophysical Research Letters, 2022-10-17)About 10% of Europe's surface area is prone to rapid flooding of rivers confined in valleys. The devastating potential of such floods is exacerbated by the deficits of existing gauging networks, including low station ... -
A seismic monitoring approach to detect and quantify river sediment mobilization by steelhead redd-building activity
(Earth Surface Processes and Landforms, 2020)The role of spawning salmonids in altering river bed morphology and sediment transport is significant, yet poorly understood. This is due, in large part, to limitations in monitoring the redd-building process in a continuous ... -
A Spectrally Consistent Globally Defined Geodetic Mean Dynamic Ocean Topography
(Journal of Geophysical Research: Oceans, 2020)The space-borne geodetic temporal mean dynamic topography (MDT) is obtained from the difference of altimetric mean sea surface (MSS) h and the geoid height N. With the geostrophic surface currents obtained from its gradient, ... -
A Statistical Classifier for Historical Geomagnetic Storm Drivers Derived Solely From Ground-Based Magnetic Field Measurements
(Earth and Space Science, 2019)Solar wind observations show that geomagnetic storms are mainly driven by interplanetary coronal mass ejections (ICMEs) and corotating or stream interaction regions (C/SIRs). We present a binary classifier that assigns one ... -
A stochastic fractal model of the universe related to the fractional Laplacian
(WIAS, Berlin2008)A new stochastic fractal model based on a fractional Laplace equation is developed. Exact representation for the spectral and correlation functions under random boundary excitation are obtained. Randomized spectral expansion ... -
A Stochastic Representation of Temperature Fluctuations Induced by Mesoscale Gravity Waves
(Journal of Geophysical Research: Atmospheres, 2019)Ubiquitous mesoscale gravity waves generate high cooling rates important for cirrus formation. We make use of long-duration balloon observations to devise a probabilistic model describing mesoscale temperature uctuations ... -
A storyline attribution of the 2011/2012 drought in Southeastern South America
(Weather, 2022-03-24)The 2011/2012 summer drought in Southeastern South America (SESA) was a short but devastating event. What would this event have looked like under pre‐industrial conditions, or in a +2 degC world? We find that climate change ... -
A Synoptic‐Scale Wavelike Structure in the Nighttime Equatorial Ionization Anomaly
(Earth and Space Science, 2021-02-17)Both ground‐ and satellite‐based airglow imaging have significantly contributed to understanding the low‐latitude ionosphere, especially the morphology and dynamics of the equatorial ionization anomaly (EIA). The NASA ... -
A Thermo‐Compositional Model of the Cratonic Lithosphere of South America
(Geochemistry, Geophysics, Geosystems, 2021-04-22)New seismic data on the crust and upper mantle of South America have recently become available and describe its deep structure with unprecedented resolution. Here, seismic data are combined with gravity data and mineral ... -
A Universal Approach for the Non‐Iterative Parametrization of Near‐Surface Turbulent Fluxes in Climate and Weather Prediction Models
(Journal of Advances in Modeling Earth Systems, 2021-08-04)Weather prediction and climate simulations need reliable parameterizations of turbulent fluxes in the stable surface layer. Especially in these conditions, the uncertainties of such parametrizations are still large. Most ... -
A weather system perspective on winter–spring rainfall variability in southeastern Australia during El Niño
(Quarterly Journal of the Royal Meteorological Society, 2020)The El Niño phase of the El Niño Southern Oscillation (ENSO) is typically associated with below-average cool-season rainfall in southeastern Australia (SEA). However, there is also large case-to-case variability on monthly ... -
A wind-driven model of the ocean surface layer with wave radiation physics
(Ocean Dynamics, 2020-07-23)Surface windstress transfers energy to the surface mixed layer of the ocean, and this energy partly radiates as internal gravity waves with near-inertial frequencies into the stratified ocean below the mixed layer where ... -
Abrupt Climate and Weather Changes Across Time Scales
(Paleoceanography and Paleoclimatology, 2020)The past provides evidence of abrupt climate shifts and changes in the frequency of climate and weather extremes. We explore the nonlinear response to orbital forcing and then consider climate millennial variability down ... -
Absorbing aerosol decreases cloud cover in cloud‐resolving simulations over Germany
(Quarterly Journal of the Royal Meteorological Society, 2021-10-07)Aerosol can affect clouds in various ways. Beside the microphysical impact of aerosol particles on cloud formation, the interference of aerosol with atmospheric radiation leads to changes in local heating, surface fluxes ... -
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 ...