Journal of the Atmospheric Sciences: Recent submissions

Now showing items 3361-3380 of 13215

    • ITCZ Breakdown in Three-Dimensional Flows 

      Wang, Chia-chi; Magnusdottir, Gudrun (American Meteorological Society, 2005)
      The intertropical convergence zone (ITCZ) is observed to undulate and at times break down into a series of tropical disturbances in several days. Some of these disturbances may develop into tropical cyclones and move to ...

    • Simulations of Moist Nearly Neutral Flow over a Ridge 

      Miglietta, M. M.; Rotunno, R. (American Meteorological Society, 2005)
      Although a fairly common atmospheric condition in orographic-rain scenarios, there is relatively little known about moist neutral flows over a ridge from theory and modeling. Presented in this paper are numerical simulations ...

    • The Stratiform and Convective Components of Surface Precipitation 

      Tremblay, André (American Meteorological Society, 2005)
      One year of precipitation records taken from a subset of the World Meteorological Organization (WMO) global rain gauge network has been analyzed. This analysis has shown that the distribution of accumulation of precipitation ...

    • Excitation Mechanism of Mixed Rossby–Gravity Waves in the Equatorial Atmosphere: Role of the Nonlinear Interactions among Equatorial Waves 

      Raupp, Carlos F. M.; Silva Dias, Pedro L. (American Meteorological Society, 2005)
      One possible explanation for the relatively high signal of the mixed Rossby?gravity waves observed in the tropical atmosphere is explored in this paper. This explanation is based on the nonlinear interactions among equatorial ...

    • Refinements in the Treatment of Ice Particle Terminal Velocities, Highlighting Aggregates 

      Mitchell, David L.; Heymsfield, Andrew J. (American Meteorological Society, 2005)
      Recent work on the terminal velocity of ice crystal aggregates suggests that their ?Re?X? relationship may not be well predicted by current theory. This study examines possible reasons for this departure from theory, and ...

    • Ensemble Forecasting in a System with Model Error 

      Orrell, David (American Meteorological Society, 2005)
      Error in weather forecasting is due to inaccuracy both in the models used and in the estimate of the current atmospheric state at which the model is initiated. Because weather models are thought to be chaotic and, therefore, ...

    • Seasonal Variability of Teleconnection Patterns 

      Frederiksen, Jorgen S.; Branstator, Grant (American Meteorological Society, 2005)
      The seasonal variability of 300-hPa global streamfunction fields taken from a 40-yr period of reanalyzed observations starting on 1 January 1958 and from long 497- and 900-yr general circulation model (GCM) datasets forced ...

    • The Vertical Structure of Tropical Convection and Its Impact on the Budgets of Water Vapor and Ozone 

      Folkins, Ian; Martin, Randall V. (American Meteorological Society, 2005)
      Convective clouds in the Tropics that penetrate the boundary layer inversion preferentially detrain into a shallow outflow layer (2?5 km) or a deep outflow layer (10?17 km). The properties of these layers are diagnosed ...

    • Tropical Climate Regimes and Global Climate Sensitivity in a Simple Setting 

      Barsugli, Joseph; Shin, Sang-Ik; Sardeshmukh, Prashant D. (American Meteorological Society, 2005)
      Multiple tropical climate regimes are found in an atmospheric general circulation model (AGCM) coupled to a global slab ocean when the model is forced by different values of globally uniform insolation. Even in this simple ...

    • Mechanisms for the Development of Locally Low-Dimensional Atmospheric Dynamics 

      Oczkowski, Michael; Szunyogh, Istvan; Patil, D. J. (American Meteorological Society, 2005)
      The complexity of atmospheric instabilities is investigated by a combination of numerical experiments and diagnostic tools that do not require the assumption of linear error dynamics. These tools include the well-established ...

    • The Eastern Pacific ITCZ during the Boreal Spring 

      Gu, Guojun; Adler, Robert F.; Sobel, Adam H. (American Meteorological Society, 2005)
      The 6-yr (1998?2003) rainfall products from the Tropical Rainfall Measuring Mission (TRMM) are used to quantify the intertropical convergence zone (ITCZ) in the eastern Pacific (defined by longitudinal averages over ...

    • Optimal Perturbations in the Eady Model: Resonance versus PV Unshielding 

      de Vries, H.; Opsteegh, J. D. (American Meteorological Society, 2005)
      Using a nonmodal decomposition technique based on the potential vorticity (PV) perspective, the optimal perturbation or singular vector (SV) of the Eady model without upper rigid lid is studied for a kinetic energy norm. ...

    • Improved Formulations of the Superposition Method 

      Wang, Lian-Ping; Ayala, Orlando; Grabowski, Wojciech W. (American Meteorological Society, 2005)
      Two formulations of an improved superposition method are proposed for studying droplet?droplet hydrodynamic interactions. The formulations make explicit use of the boundary conditions on the surface of the two interacting ...

    • The Sensitivity of Diagnostic Radiative Properties to Cloud Microphysics among Cloud-Resolving Model Simulations 

      Xu, Kuan-Man (American Meteorological Society, 2005)
      This study examines the sensitivity of diagnosed radiative fluxes and heating rates to different treatments of cloud microphysics among cloud-resolving models (CRMs). The domain-averaged CRM outputs are used in this ...

    • Diagnosis of Meridional Ozone Transport Based on Mass-Weighted Isentropic Zonal Means 

      Miyazaki, Kazuyuki; Iwasaki, Toshiki (American Meteorological Society, 2005)
      A transport equation based on mass-weighted isentropic zonal means applies to the diagnosis for the meridional ozone transport in the troposphere and stratosphere. The mean and eddy ozone fluxes are estimated from the ...

    • A Radiation Algorithm with Correlated-k Distribution. Part I: Local Thermal Equilibrium 

      Li, J.; Barker, H. W. (American Meteorological Society, 2005)
      A new radiation scheme is proposed that uses the correlated-k distribution (CKD) method. The definition of the k-distribution function, the transformation between frequency space and k space, and the upper limit of the ...

    • Holes and Entrainment in Stratocumulus 

      Gerber, H.; Frick, G.; Malinowski, S. P.; Brenguier, J-L.; Burnet, F. (American Meteorological Society, 2005)
      Aircraft flights through stratocumulus clouds (Sc) during the Dynamics and Chemistry of Marine Stratocumulus II (DYCOMS-II) study off the California coast found narrow in-cloud regions with less liquid water content (LWC) ...

    • EOS Terra Aerosol and Radiative Flux Validation: An Overview of the Chesapeake Lighthouse and Aircraft Measurements for Satellites (CLAMS) Experiment 

      Smith, W. L.; Charlock, T. P.; Kahn, R.; Martins, J. V.; Remer, L. A.; Hobbs, P. V.; Redemann, J.; Rutledge, C. K. (American Meteorological Society, 2005)
      NASA developed an Earth Observing System (EOS) to study global change and reduce uncertainties associated with aerosols and other key parameters controlling climate. The first EOS satellite, Terra, was launched in December ...

    • An Idealized Model Study Relevant to the Dynamics of the Midwinter Minimum of the Pacific Storm Track 

      Deng, Yi; Mak, Mankin (American Meteorological Society, 2005)
      The synoptic variability of a two-level quasigeostrophic flow in response to plausible changes in the forcing of a localized baroclinic jet is investigated in the context of the midwinter minimum of the Pacific storm track ...

    • MISR Calibration and Implications for Low-Light-Level Aerosol Retrieval over Dark Water 

      Kahn, Ralph; Li, Wen-Hao; Martonchik, John V.; Bruegge, Carol J.; Diner, David J.; Gaitley, Barbara J.; Abdou, Wedad; Dubovik, Oleg; Holben, Brent; Smirnov, Alexander; Jin, Zhonghai; Clark, Dennis (American Meteorological Society, 2005)
      Studying aerosols over ocean is one goal of the Multiangle Imaging Spectroradiometer (MISR) and other spaceborne imaging systems. But top-of-atmosphere equivalent reflectance typically falls in the range of 0.03 to 0.12 ...