Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3081-3100 of 13215
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Dynamics of Atmospheric Regression Patterns: Regional Mountain Torque Events
(American Meteorological Society, 2006)The regression of atmospheric fields against a parameter P with lag τ is a standard procedure in meteorology. Here, the torque exerted by a mountain massif is chosen as a parameter in order to study the interaction of ... -
Dynamics of Sheared Convective Boundary Layer Entrainment. Part I: Methodological Background and Large-Eddy Simulations
(American Meteorological Society, 2006)The reported study examines the dynamics of entrainment and its effects on the evolution of the dry atmospheric convective boundary layer (CBL) when wind shear is present. The sheared CBL can be studied by means of direct ... -
Tropical Cyclogenesis Associated with Rossby Wave Energy Dispersion of a Preexisting Typhoon. Part I: Satellite Data Analyses
(American Meteorological Society, 2006)The structure and evolution characteristics of Rossby wave trains induced by tropical cyclone (TC) energy dispersion are revealed based on the Quick Scatterometer (QuikSCAT) and Tropical Rainfall Measuring Mission (TRMM) ... -
The Partitioning of Poleward Heat Transport between the Atmosphere and Ocean
(American Meteorological Society, 2006)Observations of the poleward heat transport of the earth (H) suggest that the atmosphere is the primary transporting agent poleward of 30°, that oceanic (HO) and atmospheric (HA) contributions are comparable in the tropical ... -
Light Scattering by Single Natural Ice Crystals
(American Meteorological Society, 2006)During the South Pole Ice Crystal Experiment, angular scattering intensities (ASIs) of single ice crystals formed in natural conditions were measured for the first time with the polar nephelometer instrument. The microphysical ... -
Meridional Propagation of Planetary-Scale Waves in Vertical Shear: Implication for the Venus Atmosphere
(American Meteorological Society, 2006)It is shown that planetary-scale waves are inherently accompanied by latitudinal momentum transport when they propagate vertically in vertically sheared zonal flows. Because of the dependence of the wave's latitudinal scale ... -
A New Parameterization of Cloud Droplet Activation Applicable to General Circulation Models
(American Meteorological Society, 2006)A new parameterization is proposed to link the droplet number concentration to the size distribution and chemical composition of aerosol and updraft velocity. Except for an empirical assumption of droplet growth, the ... -
Tropical Cyclone Motion in Response to Land Surface Friction
(American Meteorological Society, 2006)Numerical experiments are performed with the fifth-generation Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model (MM5) to study the effects of surface-moisture flux and friction over ... -
Predictability of Extratropical Cyclones: The Influence of Initial Condition and Model Uncertainties
(American Meteorological Society, 2006)Errors in numerical weather forecasts can be attributed to two causes: deficiencies in the modeling system and inaccurate initial conditions. Understanding of the characteristics of the growth of forecast spread related ... -
Low-Level Mesocyclonic Concentration by Nonaxisymmetric Transport. Part I: Supercell and Mesocyclone Evolution
(American Meteorological Society, 2006)An idealized simulation of a supercell using the Regional Atmospheric Modeling System (RAMS) was able to produce a low-level mesocyclone near the intersection of the forward- and rear-flank downdrafts. The creation of the ... -
Statistics of Absolute and Relative Dispersion in the Atmospheric Convective Boundary Layer: A Large-Eddy Simulation Study
(American Meteorological Society, 2006)The influence of the different scales of turbulent motion on plume dispersion in the atmospheric convective boundary layer (CBL) is studied by means of a large-eddy simulation (LES). In particular, the large-scale (meandering) ... -
Observations of Small-Scale Turbulence and Energy Dissipation Rates in the Cloudy Boundary Layer
(American Meteorological Society, 2006)Tethered balloon?borne measurements with a resolution in the order of 10 cm in a cloudy boundary layer are presented. Two examples sampled under different conditions concerning the clouds' stage of life are discussed. The ... -
Effects of Upper-Level Shear on the Structure and Maintenance of Strong Quasi-Linear Mesoscale Convective Systems
(American Meteorological Society, 2006)Recent observational studies have shown that strong midlatitude mesoscale convective systems (MCSs) tend to decay as they move into environments with less instability and smaller deep-layer vertical wind shear. These ... -
Improving Parameterization of Rain Microphysics with Disdrometer and Radar Observations
(American Meteorological Society, 2006)Disdrometer observations indicate that the raindrop size distribution (DSD) can be represented by a constrained-gamma (CG) distribution model. The model is used to retrieve DSDs from polarization radar measurements of ... -
A Simple Multicloud Parameterization for Convectively Coupled Tropical Waves. Part I: Linear Analysis
(American Meteorological Society, 2006)Recent observational analysis reveals the central role of three multicloud types, congestus, stratiform, and deep convective cumulus clouds, in the dynamics of large-scale convectively coupled Kelvin waves, westward-propagating ... -
Multiresolution Analysis of Radiative Transfer through Inhomogeneous Media. Part I: Theoretical Development
(American Meteorological Society, 2006)This paper derives a multiresolution formulation of the radiative transfer equation for inhomogeneous media. The multiresolution equation is separated into two sets of equations that help in its physical interpretation. ... -
Multiresolution Analysis of Radiative Transfer through Inhomogeneous Media. Part II: Validation and New Insights
(American Meteorological Society, 2006)The multiresolution radiative transfer equations of Part I of this paper are solved numerically for the case of inhomogeneous model clouds using Meyer?s basis functions. After analyzing the properties of Meyer?s connection ... -
On the Effective Solar Pathlength
(American Meteorological Society, 2006)The effects of atmospheric spherical curvature and refraction and their impact on radiative transfer have been studied. It is shown that formulas employed in GCMs for atmospheric curvature and refraction underestimate the ... -
Origin of the Summertime Synoptic-Scale Wave Train in the Western North Pacific
(American Meteorological Society, 2006)The origin of the summertime synoptic wave train in the western North Pacific is investigated with a multilevel, nonlinear baroclinic model. A realistic three-dimensional summer mean state is specified and eigenvectors are ... -
Modeling the Impact of Convective Entrainment on the Tropical Tropopause
(American Meteorological Society, 2006)Simulations with the Weather Research and Forecasting (WRF) cloud-resolving model of deep moist convective events reveal net cooling near the tropopause (?15?18 km above ground), caused by a combination of large-scale ...