Anzeige der Dokumente 718-737 von 1206

    • Not All Clear Air Turbulence Is Kolmogorov—The Fine‐Scale Nature of Atmospheric Turbulence 

      Rodriguez Imazio, PaolaORCIDiD; Mininni, Pablo D.ORCIDiD; Godoy, AlejandroORCIDiD; Rivaben, Nicolás; Dörnbrack, AndreasORCIDiD (Journal of Geophysical Research: Atmospheres, 2023-01-20)
      We study a strong clear air turbulence (CAT) event experienced by the German High‐Altitude Long‐Range research aircraft (HALO) during the Southern Hemisphere Transport, Dynamics, and Chemistry campaign. HALO encountered ...
    • Novel Quantification of Shallow Sediment Compaction by GPS Interferometric Reflectometry and Implications for Flood Susceptibility 

      Karegar, Makan A.ORCIDiD; Larson, Kristine M.ORCIDiD; Kusche, JürgenORCIDiD; Dixon, Timothy H.ORCIDiD (Geophysical Research Letters, 2020)
      Estimates of flood susceptibility and land loss in the world's coastal regions depend on our knowledge of sea level rise (SLR) from increases in ocean mass and volume, as well as knowledge of vertical land motion. Conventional ...
    • Nowcasting and Predicting the Kp Index Using Historical Values and Real-Time Observations 

      Shprits, Yuri Y.ORCIDiD; Vasile, Ruggero; Zhelavskaya, Irina S.ORCIDiD (Space Weather, 2019)
      Current algorithms for the real-time prediction of the Kp index use a combination of models empirically driven by solar wind measurements at the L1 Lagrange point and historical values of the index. In this study, we explore ...
    • Numerical analysis of the interaction between rockbolts and rock mass for coal mine drifts in Vietnam 

      Van, Cong Le (Univ. Freiberg (Sachsen), 2008)
      Since decades rockbolts are widely used as a support measure in mining and civil engineering. The presented literature review under special consideration of the situation in underground Vietnamese coal mines has revealed ...
    • Numerical analysis of transport in dynamical systems 

      Padberg, Kathrin (Univ. Paderborn, 2005)
      Transport processes play an important role in many natural phenomena. Prominent examples are the chaotic advection of fluid particles in geophysical flows or the transport of asteroids and comets in the solar system. Similar ...
    • Numerical determination of pressure‐dependent effective thermal conductivity in Berea sandstone 

      Siegert, MirkoORCIDiD; Gurris, MarcelORCIDiD; Finger, ClaudiaORCIDiD; Saenger, Erik H.ORCIDiD (Geophysical Prospecting, 2021-11-12)
      In this paper, the methods of digital rock physics are applied to determine pressure‐dependent effective thermal conductivity in rock samples. Simulations are performed with an in‐house three‐dimensional finite volume code. ...
    • Numerical impacts on tracer transport: A proposed intercomparison test of Atmospheric General Circulation Models 

      Gupta, AmanORCIDiD; Gerber, Edwin P.ORCIDiD; Lauritzen, Peter H. (Quarterly Journal of the Royal Meteorological Society, 2020-09-07)
      The transport of trace gases by the atmospheric circulation plays an important role in the climate system and its response to external forcing. Transport presents a challenge for Atmospheric General Circulation Models ...
    • 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 ...