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Superconducting hot electron bolometers on silicon nitride membranes for terahertz waveguide mixers
(Univ. Köln, 2004)
The topic of this work is the development of Hot Electron Bolometer (HEB) mixers on freestanding membrane substrates for terahertz high resolution heterodyne receiver systems. The radio astronomy in the THz frequency ...
Cosmology through gravitational lenses
(Univ. Potsdam, 2004)
In dieser Dissertation nutze ich den Gravitationslinseneffekt, um eine Reihe von kosmologischen Fragen zu untersuchen. Der Laufzeitunterschied des Gravitationslinsensystems HE1104-1805 wurde mit unterschiedlichen Methoden ...
Kopplung globaler Eigenschwingungen der Sonne durch Konvektion
(Univ. Freiburg (Breisgau), 2002)
Der Einfluss von grossskaligen Stroemungskomponenten auf globale adiabatische solare Oszillationen wird mit Hilfe von Stoerungstheorie untersucht. Stationaere poloidale Komponenten fuehren zu Frequenzverschiebungen, die ...
The generalized Ekman model for the tropical cyclone boundary layer revisited: Addendum
(
- Quarterly Journal of the Royal Meteorological Society
, 2021-03-23)
Motivated by prior research examining the myth of inertial stability as a radial restoring force in the tropical cyclone boundary layer, we explore factors determining the vertical velocity at the top of the linear vortex ...
Catastrophic cooling in solar coronal loops
(Univ. Freiburg (Breisgau), 2005)
Satellite observations with high spatial and temporal resolution have revealed the highly dynamic nature of the solar corona and enabled us to study physical processes in the outer atmosphere of our mother star in great ...
Mit Geophysik in die Zukunft - eine Denkschrift 1997
(
- Mitteilungen - Deutsche Geophysikalische Gesellschaft ; 1996,4
)
Wird heute genug für die wissenschaftliche und technologische Steuerung des sich immer rasanter vollziehenden globalen und regionalen Wandels der Bio- und Geosphäre getan? Hat die internationale Gemeinschaft die Kraft zu ...
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 ...
Whole Atmosphere Model Simulations of Ultrafast Kelvin Wave Effects in the Ionosphere and Thermosphere
(
- Journal of Geophysical Research: Space Physics
, 2020)
The response of the upper atmosphere to equatorial Kelvin waves with a period of ∼3 days, also known as ultrafast Kelvin waves (UFKWs). The whole atmosphere model Ground-to-topside model of Atmosphere and Ionosphere for ...
Investigation of UV Absorbers on Venus Using the 283 and 365 nm Phase Curves Obtained From Akatsuki
(
- Geophysical Research Letters
, 2021-04-08)
The so‐called unknown absorber in the clouds of Venus is an important absorber of solar energy, but its vertical distribution remains poorly quantified. We analyze the 283 and 365 nm phase curves of the disk‐integrated ...
Trace - tree rings in archaeology, climatology and ecology
(
- Scientific Technical Report / Geoforschungszentrum Potsdam
, 2008)