Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3541-3560 of 13215
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Explicitly Stochastic Parameterization of Nonorographic Gravity Wave Drag
(American Meteorological Society, 2011)straightforward methodology is presented for converting the deterministic multiwave parameterizations of nonorographic gravity wave drag, currently used in general circulation models (GCMs), to stochastic analogs that use ... -
Interannual Changes of Stratospheric Temperature and Ozone: Forcing by Anomalous Wave Driving and the QBO
(American Meteorological Society, 2011)3D model of dynamics and photochemistry is used to investigate interannual changes of stratospheric dynamical and chemical structure through their dependence on tropospheric planetary waves and on the quasi-biennial ... -
The Basic Ingredients of the North Atlantic Storm Track. Part II: Sea Surface Temperatures
(American Meteorological Society, 2011)he impact of North Atlantic SST patterns on the storm track is investigated using a hierarchy of GCM simulations using idealized (aquaplanet) and ?semirealistic? boundary conditions in the atmospheric component (HadAM3) ... -
Dynamics and Structure of Forecast Error Covariance in the Core of a Developing Hurricane
(American Meteorological Society, 2011)n ensemble of cloud-resolving forecasts from the Weather Research and Forecasting model (WRF) was used to study error covariance for Hurricane Katrina (2005) during a 64-h period in which the storm progressed from a tropical ... -
On the Vertical Decay Rate of the Maximum Tangential Winds in Tropical Cyclones
(American Meteorological Society, 2011)n this study, it is shown that the maximum tangential winds within tropical cyclones decrease with height at a percentage rate that is nearly independent of both the maximum wind speed and the radius of maximum winds (RMW). ... -
A Model for Scale Interaction in the Madden–Julian Oscillation
(American Meteorological Society, 2011)he Madden?Julian oscillation (MJO) is an equatorial planetary-scale circulation system coupled with a multiscale convective complex, and it moves eastward slowly (about 5 m s?1) with a horizontal quadrupole vortex and ... -
Dynamical Evolution of North Atlantic Ridges and Poleward Jet Stream Displacements
(American Meteorological Society, 2011)he development of a particular wintertime atmospheric circulation regime over the North Atlantic, comprising a northward shift of the North Atlantic eddy-driven jet stream and an associated strong and persistent ridge in ... -
Comments on “A Spectral Parameterization of Drag, Eddy Diffusion, and Wave Heating for a Three-Dimensional Flow Induced by Breaking Gravity Waves”
(American Meteorological Society, 2011) -
The Influence of the Quasi-Biennial Oscillation on the Troposphere in Winter in a Hierarchy of Models. Part I: Simplified Dry GCMs
(American Meteorological Society, 2011)dry primitive equation model is used to explain how the quasi-biennial oscillation (QBO) of the tropical stratosphere can influence the troposphere, even in the absence of tropical convection anomalies and a variable ... -
The Spectral Ice Habit Prediction System (SHIPS). Part III: Description of the Ice Particle Model and the Habit-Dependent Aggregation Model
(American Meteorological Society, 2011)he purpose of this paper is to describe a numerical scheme of the Spectral Ice Habit Prediction System (SHIPS) that simulates the dependency of aggregation process explicitly on crystal habit and size in cloud-resolving ... -
The Spectral Ice Habit Prediction System (SHIPS). Part IV: Box Model Simulations of the Habit-Dependent Aggregation Process
(American Meteorological Society, 2011)he purpose of this paper is to assess the prediction of particle properties of aggregates and particle size distributions with the Spectral Ice Habit Prediction System (SHIPS) and to investigate the effects of crystal ... -
A Simplified Model for Intermittent Turbulence in the Nocturnal Boundary Layer
(American Meteorological Society, 2011)model for the exchange between the surface and the atmosphere under stable conditions is proposed. It is based on the classical scheme first suggested by Blackadar and comprises prognostic equations for the wind components ... -
Zonal Asymmetry of the Annular Mode and Its Downstream Subtropical Jet: An Idealized Model Study
(American Meteorological Society, 2011)his study investigates linkages between the zonal asymmetry of the annular mode (AM) zonal pattern and the subtropical jet (STJ) over its downstream regions of the storm track by using an idealized model. Observational ... -
The Influence of the Cloud Shell on Tracer Budget Measurements of LES Cloud Entrainment
(American Meteorological Society, 2011)irect measurements of rates of entrainment into and detrainment from cumulus cloud cores obtained from LES model cloud fields produce values twice as large as those produced from tracer budget calculations. This difference ... -
Stochastic Forcing of Potential Vorticity: Observations
(American Meteorological Society, 2011)he linear theory of point correlation maps for synoptic systems relies so far mainly on specifications of stochastic forcing due to nonlinear processes that are not based on observations. Forty-year ECMWF Re-Analysis ... -
The Role of Small Soluble Aerosols in the Microphysics of Deep Maritime Clouds
(American Meteorological Society, 2011)ome observational evidence?such as bimodal drop size distributions, comparatively high concentrations of supercooled drops at upper levels, high concentrations of small ice crystals in cloud anvils leading to high optical ... -
Microphysical Structure of the Marine Boundary Layer under Strong Wind and Spray Formation as Seen from Simulations Using a 2D Explicit Microphysical Model. Part I: The Impact of Large Eddies
(American Meteorological Society, 2011)he effects of large eddies (LE) on the marine boundary layer (MBL) microphysics and thermodynamics is investigated using a 2D Lagrangian model with spectral bin microphysics including effects of sea spray. The 600 m ? 400 ... -
A Dynamical Interpretation of the Poleward Shift of the Jet Streams in Global Warming Scenarios
(American Meteorological Society, 2011)he role played by enhanced upper-tropospheric baroclinicity in the poleward shift of the jet streams in global warming scenarios is investigated. Major differences between the twentieth- and twenty-first-century simulations ... -
The Modified Gamma Size Distribution Applied to Inhomogeneous and Nonspherical Particles: Key Relationships and Conversions
(American Meteorological Society, 2011)he four-parameter modified gamma distribution (MGD) is the most general mathematically convenient model for size distributions of particle types ranging from aerosols and cloud droplets or ice particles to liquid and frozen ... -
Axisymmetric Hurricane in a Dry Atmosphere: Theoretical Framework and Numerical Experiments
(American Meteorological Society, 2011)his paper discusses the possible existence of hurricanes in an atmosphere without water vapor and analyzes the dynamic and thermodynamic structures of simulated hurricane-like storms in moist and dry environments. It is ...