Journal of the Atmospheric Sciences: Recent submissions
Now showing items 4561-4580 of 13215
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(American Meteorological Society, 2004) -
Low-Frequency Variability in the Midlatitude Atmosphere Induced by an Oceanic Thermal Front
(American Meteorological Society, 2004)This study examines the flow induced in a highly idealized atmospheric model by an east?west-oriented oceanic thermal front. The model has a linear marine boundary layer coupled to a quasigeostrophic, equivalent- barotropic ... -
Effective Ice Particle Densities Derived from Aircraft Data
(American Meteorological Society, 2004)In this study, aircraft data are used to derive effective ice particle densities. This density is defined as the ice particle mass divided by the volume of an equivalent diameter sphere. Measured ice particle size distributions ... -
Scaling Properties of Aerosol Optical Thickness Retrieved from Ground-Based Measurements
(American Meteorological Society, 2004)Statistical scale-by-scale analysis, for the first time, has been applied to the aerosol optical thickness (AOT) retrieved from the Multi-Filter Rotating Shadowband Radiometer (MFRSR) network. The MFRSR data were collected ... -
Comments on “The Structure and Composition of the Annular Modes in an Aquaplanet General Circulation Model”
(American Meteorological Society, 2004) -
Ocean Mixed Layer Temperature Variations Induced by Intraseasonal Convective Perturbations over the Indian Ocean
(American Meteorological Society, 2004)In situ and satellite observations reveal that the tropical intraseasonal oscillation is occasionally associated with large variations in sea surface temperature (SST). The purpose of this paper is to find the physical ... -
Comments on “The k−3 and k−5/3 Energy Spectrum of Atmospheric Turbulence: Quasigeostrophic Two-Level Model Simulation”
(American Meteorological Society, 2004) -
On Maximum Entropy Profiles
(American Meteorological Society, 2004)A column of dry air in hydrostatic equilibrium is considered, bounded by two fixed values of the pressure, and the question is asked, what vertical temperature profile maximizes the total entropy of the column? Using an ... -
Enhancement of Rossby Wave Breaking by Steep Potential Vorticity Gradients in the Winter Stratosphere
(American Meteorological Society, 2004)This work investigates the extent to which potential vorticity gradients affect the vertical propagation of planetary-scale Rossby waves on the edge of a stratospheric polar vortex and their eventual nonlinear saturation ... -
Chemical Amplification (or Dampening) of the Twomey Effect: Conditions Derived from Droplet Activation Theory
(American Meteorological Society, 2004)Cloud droplet number concentrations are controlled by both meteorological and microphysical factors. Microphysical factors include aerosol number concentration and composition. This paper examines the importance of ... -
Investigating 2D Modeling of Atmospheric Convection in the PBL
(American Meteorological Society, 2004)The performance of a two-dimensional (2D) numerical model in representing three-dimensional (3D) planetary boundary layer (PBL) convection is investigated by comparing the 2D model solution to that of a 3D large- eddy ... -
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(American Meteorological Society, 2004) -
Eddy–Zonal Flow Interactions Associated with the Southern Hemisphere Annular Mode: Results from NCEP–DOE Reanalysis and a Quasi-Linear Model
(American Meteorological Society, 2004)Using a recent 22-yr (1979?2000) record of the NCEP?Department of Energy (DOE) reanalysis 2 dataset (hereafter, NCEP2 reanalysis) and a two-level spherical quasi-geostrophic, quasi-linear model, the eddy?zonal- mean flow ... -
Flow over Small Heat Islands: A Numerical Sensitivity Study
(American Meteorological Society, 2004)A two-dimensional nonlinear model with physical parameterizations was applied to simulate the observed diurnal variation on the 5-km-wide flat tropical island of Nauru in the trade wind zone. Both the model and Atmospheric ... -
Estimations of Mass Fluxes for Cumulus Parameterizations from High-Resolution Spatial Data
(American Meteorological Society, 2004)The core of the mass flux formulation, on which the majority of the current cumulus parameterizations are based, is to transport physical variables by the so-called mass flux for individual physical components, such as ... -
Parameterization of Joint Frequency Distributions of Potential Temperature and Water Vapor Mixing Ratio in the Daytime Convective Boundary Layer
(American Meteorological Society, 2004)Joint frequency distributions (JFDs) of potential temperature (?) versus water vapor mixing ratio (r) within the convective boundary layer were measured during a new field experiment named Boundary Layer Experiment 1996 ... -
Environmental Control of Tropical Cyclone Intensity
(American Meteorological Society, 2004)The influence of various environmental factors on tropical cyclone intensity is explored using a simple coupled ocean?atmosphere model. It is first demonstrated that this model is capable of accurately replicating the ... -
A New Representation of Collision-Induced Breakup of Raindrops and Its Implications for the Shapes of Raindrop Size Distributions
(American Meteorological Society, 2004)Using results of laboratory experiments on collision-induced raindrop breakup, Low and List (LL) developed a parameterization describing the fragment size distribution (FSD) produced by collisions of raindrops. An equilibrium ... -
Evolution of Analysis Error and Adjoint-Based Sensitivities: Implications for Adaptive Observations
(American Meteorological Society, 2004)The structure and evolution of analysis error and adjoint-based sensitivities [potential enstrophy initial singular vectors (SVs) and gradient sensitivities of the forecast error to initial conditions] are compared following ... -
Observation of Water Vapor Greenhouse Absorption over the Gulf of Mexico Using Aircraft and Satellite Data
(American Meteorological Society, 2004)Through its interaction with radiation, water vapor provides an important link between the ocean and atmosphere. One way this occurs is through the greenhouse effect; observations of water vapor greenhouse absorption in ...