Journal of the Atmospheric Sciences: Recent submissions

Now showing items 4221-4240 of 13215

    • Application of the Lighthill–Ford Theory of Spontaneous Imbalance to Clear-Air Turbulence Forecasting 

      Knox, John A.; McCann, Donald W.; Williams, Paul D. (American Meteorological Society, 2008)
      A new method of clear-air turbulence (CAT) forecasting based on the Lighthill?Ford theory of spontaneous imbalance and emission of inertia?gravity waves has been derived and applied on episodic and seasonal time scales. A ...

    • Aerosol Impacts on the Diurnal Cycle of Marine Stratocumulus 

      Sandu, Irina; Brenguier, Jean-Louis; Geoffroy, Olivier; Thouron, Odile; Masson, Valery (American Meteorological Society, 2008)
      Recent large-eddy simulation (LES) studies of the impact of aerosol on the dynamics of nocturnal marine stratocumulus revealed that, depending on the large-scale forcings, an aerosol-induced increase of the droplet ...

    • Orographic Clouds in Terrain-Blocked Flows: An Idealized Modeling Study 

      Galewsky, Joseph (American Meteorological Society, 2008)
      Idealized numerical simulations of moist strongly stratified flow over topography are used to study the processes that control orographic clouds in terrain-blocked flows as a joint function of the nondimensional flow ...

    • A Modeling Study of Typhoon Nari (2001) at Landfall. Part I: Topographic Effects 

      Yang, Ming-Jen; Zhang, Da-Lin; Huang, Hsiao-Ling (American Meteorological Society, 2008)
      Although there have been many observational and modeling studies of tropical cyclones, understanding of their intensity and structural changes after landfall is rather limited. In this study, several 84-h cloud-resolving ...

    • Inertia–Gravity Waves Emitted from Balanced Flow: Observations, Properties, and Consequences 

      Williams, Paul D.; Haine, Thomas W. N.; Read, Peter L. (American Meteorological Society, 2008)
      This paper describes laboratory observations of inertia?gravity waves emitted from balanced fluid flow. In a rotating two-layer annulus experiment, the wavelength of the inertia?gravity waves is very close to the deformation ...

    • Aerosol Influence on Mixed-Phase Clouds in CAM-Oslo 

      Storelvmo, Trude; Kristjánsson, Jón Egill; Lohmann, Ulrike (American Meteorological Society, 2008)
      A new treatment of mixed-phase cloud microphysics has been implemented in the general circulation model, Community Atmosphere Model (CAM)-Oslo, which combines the NCAR CAM2.0.1 and a detailed aerosol module. The new treatment ...

    • Validity of a Linear Stochastic View of ENSO in an ACGCM 

      Kallummal, Rameshan; Kirtman, Ben P. (American Meteorological Society, 2008)
      Calculations of the optimal perturbations of an anomaly coupled ocean?atmosphere general circulation model (ACGCM) have been performed using a set of linear (Markov) models best fit to 300 years of continuous simulations. ...

    • Resonant Wave Interactions in the Equatorial Waveguide 

      Raupp, Carlos F. M.; Silva Dias, Pedro L.; Tabak, Esteban G.; Milewski, Paul (American Meteorological Society, 2008)
      Weakly nonlinear interactions among equatorial waves have been explored in this paper using the adiabatic version of the equatorial ?-plane primitive equations in isobaric coordinates. Assuming rigid lid vertical boundary ...

    • A Model Study of Gravity Waves over Hurricane Humberto (2001) 

      Kuester, M. A.; Alexander, M. J.; Ray, E. A. (American Meteorological Society, 2008)
      Atmospheric gravity waves are known to influence global circulations. Understanding these waves and their sources help to develop parameterizations that include their effects in climate and weather forecasting models. Deep ...

    • The Effects of Mesoscale Surface Heterogeneity on the Fair-Weather Convective Atmospheric Boundary Layer 

      Kang, Song-Lak; Davis, Kenneth J. (American Meteorological Society, 2008)
      Large-eddy simulation (LES) is used to examine the impact of heterogeneity in the surface energy balance on the mesoscale and microscale structure of the convective atmospheric boundary layer (ABL). A long (16 or 32 km) ...

    • Internal Variability of the Winter Stratosphere. Part II: Time-Dependent Forcing 

      Scott, R. K.; Polvani, L. M.; Waugh, D. W. (American Meteorological Society, 2008)
      This paper considers the effect of time-dependent lower boundary wave forcing on the internal variability found to appear spontaneously in a stratosphere-only model when the forcing is perfectly steady. While the time-dependent ...

    • Scaling Laws and Regime Transitions of Macroturbulence in Dry Atmospheres 

      Schneider, Tapio; Walker, Christopher C. (American Meteorological Society, 2008)
      In simulations of a wide range of circulations with an idealized general circulation model, clear scaling laws of dry atmospheric macroturbulence emerge that are consistent with nonlinear eddy?eddy interactions being weak. ...

    • Assimilation of Satellite Cloud and Precipitation Observations in Numerical Weather Prediction Models: Introduction to the JAS Special Collection 

      Errico, Ronald M.; Ohring, George; Weng, Fuzhong; Bauer, Peter; Ferrier, Brad; Mahfouf, Jean-François; Turk, Joe (American Meteorological Society, 2007)
      To date, the assimilation of satellite measurements in numerical weather prediction (NWP) models has focused on the clear atmosphere. But satellite observations in the visible, infrared, and microwave provide a great deal ...

    • The Dynamics of Atmospherically Driven Intraseasonal Polar Motion 

      Feldstein, Steven B. (American Meteorological Society, 2008)
      The atmospheric dynamical processes that drive intraseasonal polar motion are examined with National Centers for Environmental Prediction?National Center for Atmospheric Research reanalysis data and with pole position data ...

    • Interaction of Upper-Tropospheric Turbulence and Gravity Waves as Obtained from Spectral and Structure Function Analyses 

      Lu, Chungu; Koch, Steven E. (American Meteorological Society, 2008)
      Spectral and structure function analyses of horizontal velocity fields observed in the upper troposphere and lower stratosphere during the Severe Clear Air Turbulence Collides with Air Traffic (SCATCAT) field program, ...

    • CORRIGENDUM 

      Tan, Zhe-Min; Zhang, Fuqing; Rotunno, Richard; Snyder, Chris (American Meteorological Society, 2008)

    • Meridional and Downward Propagation of Atmospheric Circulation Anomalies. Part II: Southern Hemisphere Cold Season Variability 

      Ren, R-C.; Cai, Ming (American Meteorological Society, 2008)
      As in the Northern Hemisphere, there exists a simultaneous poleward propagation of temperature anomalies in the stratosphere and equatorward propagation in the troposphere in the Southern Hemisphere?s cold season. It takes ...

    • Mountain Waves Entering the Stratosphere 

      Smith, Ronald B.; Woods, Bryan K.; Jensen, Jorgen; Cooper, William A.; Doyle, James D.; Jiang, Qingfang; Grubišić, Vanda (American Meteorological Society, 2008)
      Using the National Science Foundation (NSF)?NCAR Gulfstream V and the NSF?Wyoming King Air research aircraft during the Terrain-Induced Rotor Experiment (T-REX) in March?April 2006, six cases of Sierra Nevada mountain waves ...

    • Stratospheric Gravity Waves Generated by Multiscale Tropical Convection 

      Lane, Todd P.; Moncrieff, Mitchell W. (American Meteorological Society, 2008)
      The generation of gravity waves by multiscale cloud systems evolving in an initially motionless and thermodynamically uniform environment is explored using a two-dimensional cloud-system-resolving model. The simulated ...

    • Horizontally Homogeneous Rotating Radiative–Convective Equilibria at GCM Resolution 

      Held, Isaac M.; Zhao, Ming (American Meteorological Society, 2008)
      Rotating radiative?convective equilibrium, using the column physics and resolution of GCMs, is proposed as a useful framework for studying the tropical storm?like vortices produced by global models. These equilibria are ...