Anzeige der Dokumente 728-747 von 1211

    • Numerical investigation of the turbulent ISM 

      Kissmann, Ralf (Univ. Bochum, 2007)
      In this work we introduced basic turbulence theory into the framework of the interstellar medium. In many cases turbulence simulations are applied to the interstellar medium (ISM) merely because it is a medium, where ...
    • Numerical simulation of magma ascent by dykes and crust formation at spreading centres 

      Kühn, Daniela Kerstin (Univ. Hamburg, 2005)
      Mittelozeanische Rücken finden sich in allen größeren Ozeanbecken der Erde. Sie besitzen die weltweit höchste Produktionsrate an Extrusiv- und Intrusivgesteinen. Bildung ozeanischer Kruste und Vulkanismus an divergenten ...
    • Numerical simulations of neutron star - black hole mergers 

      Löffler, Frank (Univ. Potsdam, 2006)
      Collisions of black holes and neutron stars, named mixed binaries in the following, are interesting because of at least two reasons. Firstly, it is expected that they emit a large amount of energy as gravitational waves, ...
    • Oblique Gravity Wave Propagation During Sudden Stratospheric Warmings 

      Stephan, C. C.; Schmidt, H.ORCIDiD; Zülicke, C.; Matthias, V.ORCIDiD (Journal of Geophysical Research: Atmospheres, 2020)
      Gravity waves (GWs) are important for coupling the mesosphere to the lower atmosphere during sudden stratospheric warmings (SSWs). Here, a minor SSW is internally generated in a simulation with the upper-atmosphere ...
    • Oblique Propagation and Refraction of Gravity Waves Over the Andes Observed by GLORIA and ALIMA During the SouthTRAC Campaign 

      Krasauskas, L.ORCIDiD; Kaifler, B.ORCIDiD; Rhode, S.ORCIDiD; Ungermann, J.ORCIDiD; Woiwode, W.ORCIDiD; Preusse, P.ORCIDiD (Journal of Geophysical Research: Atmospheres, 2023-05-22)
      Abstract

      Gravity waves (GW) carry energy and momentum from the troposphere to the middle atmosphere ...

    • Observational Evidence for Multivariate Drought Hazard Amplifications Across Disparate Climate Regimes 

      Ganguli, PoulomiORCIDiD; Majhi, Avijit; Kumar, RohiniORCIDiD (Earth's Future, 2022-09-16)
      Drought poses significant challenges to global water security in a warming world. A global‐scale synthesis of the multivariate drought risk considering interdependencies between drought attributes across disparate climate ...
    • Observations and high-resolution simulations of convective precipitation organization over the tropical Atlantic 

      Brune, SebastianORCIDiD; Buschow, SebastianORCIDiD; Friederichs, PetraORCIDiD (Quarterly Journal of the Royal Meteorological Society, 2020)
      High-resolution simulations (grid spacing 2.5 km) are performed with ICON-LEM to characterize convective organization in the Tropics during August 2016 over a large domain ranging from northeastern South America, along the ...
    • Observations of Gravity Wave Refraction and Its Causes and Consequences 

      Geldenhuys, M.ORCIDiD; Kaifler, B.ORCIDiD; Preusse, P.ORCIDiD; Ungermann, J.ORCIDiD; Alexander, P.ORCIDiD; Krasauskas, L.ORCIDiD; Rhode, S.ORCIDiD; Woiwode, W.ORCIDiD; Ern, M.ORCIDiD; Rapp, M.ORCIDiD; Riese, M.ORCIDiD (Journal of Geophysical Research: Atmospheres, 2023-02-06)
      Horizontal gravity wave (GW) refraction was observed around the Andes and Drake Passage during the SouthTRAC campaign. GWs interact with the background wind through refraction and dissipation. This interaction helps to ...
    • Observed and Simulated Variability of Droplet Spectral Dispersion in Convective Clouds Over the Amazon 

      Hernández Pardo, LianetORCIDiD; Machado, Luiz A. T.ORCIDiD; Morrison, HughORCIDiD; Cecchini, Micael A.ORCIDiD; Andreae, Meinrat O.ORCIDiD; Pöhlker, Christopher; Pöschl, Ulrich; Rosenfeld, DanielORCIDiD; Vendrasco, Eder P.; Voigt, ChristianeORCIDiD; Wendisch, ManfredORCIDiD; Pöhlker, Mira L.ORCIDiD (Journal of Geophysical Research: Atmospheres, 2021-10-15)
      In this study, the variability of the spectral dispersion of droplet size distributions (DSDs) in convective clouds is investigated. Analyses are based on aircraft measurements of growing cumuli near the Amazon basin, and ...
    • Observed Subdecadal Variations of European Summer Temperatures 

      Müller, W.A.; Borchert, L.ORCIDiD; Ghosh, R. (Geophysical Research Letters, 2020)
      We identify subdecadal variations in European summer temperatures in coupled and uncoupled century-long reanalyses. Spectral analyses reveal significant peaks at 5–10 years in the midtwentieth century. The subdecadal ...
    • Observing Earth’s magnetic environment with the GRACE-FO mission 

      Stolle, C.ORCIDiD; Michaelis, I.; Xiong, C.ORCIDiD; Rother, M.; Usbeck, Th.; Yamazaki, Y.ORCIDiD; Rauberg, J.; Styp-Rekowski, K. (Earth, Planets and Space, 2021-02-15)
      The Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission carries magnetometers that are dedicated to enhance the satellite’s navigation. After appropriate calibration and characterisation of artificial ...
    • Observing noctilucent clouds 

      Gadsden, Michael; Parvianinen, Pekka (Internat. Assoc. of Geomagnetism & Aeronomy, 2006)
      This manual and instruction book was written by a group of active researchers, both professional and amateur. There are chapters giving practical advice for taking visual observations, photographing the clouds with film ...
    • Ocean Bottom Pressure Variability: Can It Be Reliably Modeled? 

      Androsov, Alexey; Boebel, Olaf; Schröter, JensORCIDiD; Danilov, SergeyORCIDiD; Macrander, Andreas; Ivanciu, IoanaORCIDiD (Journal of Geophysical Research: Oceans, 2020)
      Ocean bottom pressure (OBP) variability serves as a proxy of ocean mass variability, the knowledge of which is needed in geophysical applications. The question of how well it can be modeled by the present general ocean ...
    • Ocean Model Formulation Influences Transient Climate Response 

      Semmler, TidoORCIDiD; Jungclaus, JohannORCIDiD; Danek, ChristopherORCIDiD; Goessling, Helge F.ORCIDiD; Koldunov, Nikolay V.ORCIDiD; Rackow, ThomasORCIDiD; Sidorenko, DmitryORCIDiD (Journal of Geophysical Research: Oceans, 2021-12-05)
      The transient climate response (TCR) is 20% higher in the Alfred Wegener Institute Climate Model (AWI‐CM) compared to the Max Planck Institute Earth System Model (MPI‐ESM) whereas the equilibrium climate sensitivity (ECS) ...
    • On classification of logging data 

      Gelfort, Ralf (Univ. Clausthal, 2006)
      Die Erkennung stratigraphischer Einheiten innerhalb von marinen Sedimentablagerungen wird üblicherweise durch eine kombinierte Interpretation von Seismik-, Bohrlochsonden- und Kern-Daten vorgenommen. Im Falle von mehrdeutigen ...
    • On gravity wave parameterisation in vicinity of low‐level blocking 

      Geldenhuys, MarkusORCIDiD (Atmospheric Science Letters, 2022-03-07)
      This note is framed as an open question to the community regarding parameterisation schemes using the blocking layer depth to reduce the orographic gravity wave drag. It is the purpose of this note to argue that the current ...
    • On intrinsic uncertainties in earth system modelling 

      Knopf, Brigitte (Univ. Potsdam, 2006)
      Various types of uncertainty plague climate change simulation, which is, in turn, a crucialelement of Earth System modelling. This fact was recognized for example in the Third Assessment Report (TAR) of the Intergovernmental ...
    • On the determination of the atmospheric outer scale length of turbulence using GPS phase difference observations: the Seewinkel network 

      Kermarrec, GaëlORCIDiD; Schön, SteffenORCIDiD (Earth, Planets and Space, 2020-12-04)
      Microwave electromagnetic signals from the Global Navigation Satellite System (GNSS) are affected by their travel through the atmosphere: the troposphere, a non-dispersive medium, has an especial impact on the measurements. ...
    • On the Dynamical Importance of Gravity Wave Sources Distributed Over Different Heights in the Atmosphere 

      Medvedev, Alexander S.ORCIDiD; Klaassen, Gary P.ORCIDiD; Yiğit, ErdalORCIDiD (Journal of Geophysical Research: Space Physics, 2023-03-15)
      Gravity waves (GWs) are generated at all altitudes in the atmosphere, but sources above the lower stratosphere are rarely considered by parameterizations employed in general circulation models. This study assesses the ...
    • On the evaluation of climate change impact models 

      Wagener, ThorstenORCIDiD; Reinecke, RobertORCIDiD; Pianosi, FrancescaORCIDiD (Wiley Interdisciplinary Reviews: Climate Change, 2022-03-03)
      In‐depth understanding of the potential implications of climate change is required to guide decision‐ and policy‐makers when developing adaptation strategies and designing infrastructure suitable for future conditions. ...