Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2461-2480 of 13215
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Variability and Predictability of a Three-Dimensional Hurricane in Statistical Equilibrium
(American Meteorological Society, 2012)he internal variability and predictability of idealized three-dimensional hurricanes is investigated using 100-day-long, statistically steady simulations in a compressible, nonhydrostatic, cloud-resolving model. The ... -
A Numerical Modeling Study of the Propagation of Idealized Sea-Breeze Density Currents
(American Meteorological Society, 2012)ea breezes are often modeled as a wave response to transient heating in a stratified environment. They occur, however, as density currents with well-defined fronts, the understanding of which rests primarily on experiments ... -
Zonal-Mean Dynamics of Extended Recoveries from Stratospheric Sudden Warmings
(American Meteorological Society, 2012)he recovery of the Arctic polar vortex following stratospheric sudden warmings is found to take upward of 3 months in a particular subset of cases, termed here polar-night jet oscillation (PJO) events. The anomalous ... -
Adjoint Sensitivity and Predictability of Tropical Cyclogenesis
(American Meteorological Society, 2012)he sensitivity of tropical cyclogenesis and subsequent intensification is explored by applying small perturbations to the initial state in the presence of organized mesoscale convection and synoptic-scale forcing using the ... -
Interactions between Shallow and Deep Convection under a Finite Departure from Convective Quasi Equilibrium
(American Meteorological Society, 2012)he present paper presents a simple theory for the transformation of nonprecipitating, shallow convection into precipitating, deep convective clouds. To make the pertinent point a much idealized system is considered, ... -
Aerosol Size Distribution, Particle Concentration, and Optical Property Variability near Caribbean Trade Cumulus Clouds: Isolating Effects of Vertical Transport and Cloud Processing from Humidification Using Aircraft Measurements
(American Meteorological Society, 2013)his paper examines the effect of trade wind cumulus clouds on aerosol properties in the near-cloud environment using data from the Rain in Cumulus over the Ocean (RICO) campaign. Aerosol size distributions, particle ... -
A Unified Model for Moist Convective Boundary Layers Based on a Stochastic Eddy-Diffusivity/Mass-Flux Parameterization
(American Meteorological Society, 2013)single-column model (SCM) is developed for representing moist convective boundary layers. The key component of the SCM is the parameterization of subgrid-scale vertical mixing, which is based on a stochastic eddy-diffusi ... -
The Minimum Wind Speed for Sustainable Turbulence in the Nocturnal Boundary Layer
(American Meteorological Society, 2012)he collapse of turbulence in the nocturnal boundary layer is studied by means of a simple bulk model that describes the basic physical interactions in the surface energy balance. It is shown that for a given mechanical ... -
Effects of Altitude on Maximum Raindrop Size and Fall Velocity as Limited by Collisional Breakup
(American Meteorological Society, 2012)oalescence and breakup of drops are recognized as the main mechanisms determining raindrop size distributions on the ground. Full knowledge of these processes is hindered by the challenging difficulties both in the laboratory ... -
The Role of Cloud Microphysics Parameterization in the Simulation of Mesoscale Convective System Clouds and Precipitation in the Tropical Western Pacific
(American Meteorological Society, 2012)his paper presents a detailed analysis of convection-permitting cloud simulations, aimed at increasing the understanding of the role of parameterized cloud microphysics in the simulation of mesoscale convective systems ... -
Statistics of Solar Cycle–La Niña Connection: Correlation of Two Autocorrelated Time Series
(American Meteorological Society, 2012)oth the 11-yr solar cycle and the El Niño?Southern Oscillation (ENSO) phenomena are quasi periodic, with periods of 9?11 and 3?4 yr, respectively. There have been claims that the two are correlated, with the sun at its ... -
On the Mechanism Underlying the Spontaneous Emergence of Barotropic Zonal Jets
(American Meteorological Society, 2013)onal jets are commonly observed to spontaneously emerge in a ?-plane channel from a background of turbulence that is sustained in a statistical steady state by homogeneous stochastic excitation and dissipation of vorticity. ... -
African Easterly Wave Dynamics in a Mesoscale Numerical Model: The Upscale Role of Convection
(American Meteorological Society, 2011)o examine the dynamical role of convection in African easterly wave (AEW) life cycles the Weather Research and Forecasting (WRF) model is used to simulate the evolution of a single AEW from September 2004. The model ... -
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(American Meteorological Society, 2011) -
Effects of Aerosol Solubility and Regeneration on Mixed-Phase Orographic Clouds and Precipitation
(American Meteorological Society, 2012)detailed bin aerosol-microphysics scheme has been implemented into the Weather Research and Forecast Model to investigate the effects of aerosol solubility and regeneration on mixed-phase orographic clouds and precipitation. ... -
Effect of Top and Bottom Boundary Conditions on Symmetric Instability under Full-Component Coriolis Force
(American Meteorological Society, 2011)he linear stability of a zonal flow confined in a domain within horizontal top and bottom boundaries is examined under full consideration of the Coriolis force. The basic zonal flow is assumed to be in thermal wind balance ... -
Eddy Diffusivity/Mass Flux and Shallow Cumulus Boundary Layer: An Updraft PDF Multiple Mass Flux Scheme
(American Meteorological Society, 2012)n this study, the eddy diffusivity/mass flux (EDMF) approach is used to combine parameterizations of nonprecipitating moist convection and boundary layer turbulence. The novel aspect of this EDMF version is the use of a ... -
Modeled and Observed Variations in Storm Divergence and Stratiform Rain Production in Southeastern Texas
(American Meteorological Society, 2011)torm divergence profiles observed by an S-band Doppler radar are compared to ensemble simulations of 10 disparate precipitating systems occurring in warm-season, weakly baroclinic, and strongly baroclinic environments in ... -
Anelastic Internal Wave Packet Evolution and Stability
(American Meteorological Society, 2011)s upward-propagating anelastic internal gravity wave packets grow in amplitude, nonlinear effects develop as a result of interactions with the horizontal mean flow that they induce. This qualitatively alters the structure ... -
Tropopause Structure and the Role of Eddies
(American Meteorological Society, 2011)his paper presents a series of dynamical states using an idealized three-dimensional general circulation model with gray radiation and latent heat release. Beginning with the case of radiative?convective equilibrium, an ...