Journal of the Atmospheric Sciences: Recent submissions
Now showing items 4881-4900 of 13215
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ENSO-Related Variability of the Southern Hemisphere Winter Storm Track over the Eastern Pacific–Atlantic Sector
(American Meteorological Society, 2002)The interannual variability associated with the ENSO of winter storm tracks over the region extending from the eastern South Pacific Ocean across South America to the South Atlantic Ocean is described using 39 yr of data ... -
Inference of Cloud Optical Depth from Aircraft-Based Solar Radiometric Measurements
(American Meteorological Society, 2002)A method is introduced for inferring cloud optical depth τ from solar radiometric measurements made on an aircraft at altitude z. It is assessed using simulated radiometric measurements produced by a 3D Monte Carlo algorithm ... -
Early Evolution of Vertical Vorticity in a Numerically Simulated Idealized Convective Line
(American Meteorological Society, 2002)The generation and organization of mesoscale convective vortices (MCVs) is a recurring theme in midlatitude and tropical meteorology during the warm season. In this work a simulation of a finite-length idealized convective ... -
Time-Dependent Upwelling in the Tropical Lower Stratosphere Estimated from the Zonal-Mean Momentum Budget
(American Meteorological Society, 2002)Dynamical variability in the extratropical stratosphere occurs on a broad range of timescales, from daily to seasonal. Extratropical wave transience is correlated with variations in the mean meridional (Brewer?Dobson) ... -
Mountain Waves over Mont Blanc: Influence of a Stagnant Boundary Layer
(American Meteorological Society, 2002)A stationary mountain wave, embedded in southwesterly flow over Mont Blanc in the Alps, was observed simultaneously by three research aircraft and three types of remote sensing: GPS dropsondes, airborne light detecting and ... -
Inferences of Predictability Associated with Warm Season Precipitation Episodes
(American Meteorological Society, 2002)Herein preliminary findings are reported from a radar-based climatology of warm season precipitation ?episodes.? Episodes are defined as time?space clusters of heavy precipitation that often result from sequences of organized ... -
A Theoretical and Observational Analysis on the Formation of Fair-Weather Cumuli
(American Meteorological Society, 2002)The formation of fair-weather cumuli (FWC) has been analyzed in this study based on both a simple mixed layer model and a subset of the data collected from the Atmospheric Radiation Measurement (ARM) Program at the southern ... -
Measuring Dynamical Prediction Utility Using Relative Entropy
(American Meteorological Society, 2002)A new parameter of dynamical system predictability is introduced that measures the potential utility of predictions. It is shown that this parameter satisfies a generalized second law of thermodynamics in that for Markov ... -
Analysis of the Influence of Film-Forming Compounds on Droplet Growth: Implications for Cloud Microphysical Processes and Climate
(American Meteorological Society, 2002)Decades of cloud microphysical research have not provided conclusive understanding of the physical processes responsible for droplet spectral broadening. Numerous mechanisms have been proposed?for example, entrainment ... -
Theoretical Foundations for Models of Moist Convection
(American Meteorological Society, 2002)The equations describing the dynamics and thermodynamics of cloudy air are derived using the theories of multicomponent fluids and multiphase flows. The formulation is completely general and allows the hydrometeors to have ... -
On the Vertical Scale of Gravity Waves Excited by Localized Thermal Forcing
(American Meteorological Society, 2002)Gravity waves generated by convective heating are widely believed to have vertical wavelengths approximately twice the depth of the heating. The frequency, horizontal, and vertical wavelengths of gravity waves are, however, ... -
Comments on the Gravity Wave Theory of J. Weinstock Concerning Dissipation Induced by Nonlinear Effects
(American Meteorological Society, 2002)It has been alleged that gravity waves having large vertical wavenumbers in the middle atmosphere are subject to dissipation by a diffusivity engendered by other waves via nonlinear wave?wave interaction, with the diffusivity ... -
Effects of Ice Microphysics on Tropical Radiative–Convective–Oceanic Quasi-Equilibrium States
(American Meteorological Society, 2002)The effects of ice microphysics on the mean state of tropical atmosphere and ocean are quantified using a coupled cloud?ocean model. The cloud-resolving model (CRM) treats explicitly the cloud-scale dynamics instead of ... -
Terminal Velocities of Droplets and Crystals: Power Laws with Continuous Parameters over the Size Spectrum
(American Meteorological Society, 2002)This paper presents a unified treatment of cloud particle fall velocities for both liquid and crystalline cloud particles over the entire size range observed in the atmosphere. The fall velocity representation is formulated ... -
A Prognostic Parameterization for the Subgrid-Scale Variability of Water Vapor and Clouds in Large-Scale Models and Its Use to Diagnose Cloud Cover
(American Meteorological Society, 2002)A parameterization for the horizontal subgrid-scale variability of water vapor and cloud condensate is introduced, which is used to diagnose cloud fraction in the spirit of statistically based cloud cover parameterizations. ... -
High-Resolution Stratospheric Tracer Fields Reconstructed with Lagrangian Techniques: A Comparative Analysis of Predictive Skill
(American Meteorological Society, 2002)Numerical experiments and statistical analyses are conducted to determine the skill of different Lagrangian techniques for the construction of tracer distributions. High-resolution potential vorticity (PV) maps are calculated ... -
Stationary Eddy Response to Surface Boundary Forcing: Idealized GCM Experiments
(American Meteorological Society, 2002)A set of atmospheric general circulation model (AGCM) experiments under idealized conditions is performed to investigate atmospheric response to surface boundary forcing by extratropical land?sea contrast, large-scale ... -
Longwave Scattering Effects of Mineral Aerosols
(American Meteorological Society, 2002)Scattering in the longwave domain has been neglected in the first generation of radiative codes and is still neglected in most current GCMs. Scattering in the longwave domain does not play any significant role for clear-sky ... -
Convective Momentum Transport Observed during the TOGA COARE IOP. Part I: General Features
(American Meteorological Society, 2002)The momentum budget residual X = (X, Y) is estimated with objectively analyzed soundings taken during the Tropical Ocean and Global Atmosphere Coupled Ocean?Atmosphere Response Experiment (TOGA COARE) intense observing ... -
Time Evolution of Nonlinear Horizontal Convection: Its Flow Regimes and Self-Similar Solutions
(American Meteorological Society, 2002)The basic processes of time-dependent nonlinear horizontal convection caused by differential bottom cooling in a two-dimensional stratified Boussinesq fluid are investigated both theoretically and numerically. The fluid ...