Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3521-3540 of 13215
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Solutions to the Vertical Structure Equation for Simple Models of the Tropical Troposphere
(American Meteorological Society, 2011)bservation and modeling studies indicate that the wave flux from tropical heating sources that propagates into the lower stratosphere is sensitive to the buoyancy frequency profile N(z) in the troposphere. This sensitivity ... -
Kinematics of the Secondary Eyewall Observed in Hurricane Rita (2005)
(American Meteorological Society, 2011)irborne Doppler radar data collected from the concentric eyewalls of Hurricane Rita (2005) provide detailed three-dimensional kinematic observations of the secondary eyewall feature. The secondary eyewall radar echo shows ... -
How Different Calculations of the Refractive Index Affect Estimates of the Radiative Forcing Efficiency of Ammonium Sulfate Aerosols
(American Meteorological Society, 2011)alculations of the radiative properties of hydrated ammonium sulfate (AS) aerosols often employ the conventional volume mixing rule, in which the refractive indices of AS and water are linearly averaged, weighted by their ... -
New Results on the Thermodynamic Properties of the Climate System
(American Meteorological Society, 2011)n this paper the authors exploit two equivalent formulations of the average rate of material entropy production in the climate system to propose an approximate splitting between contributions due to vertical and eminently ... -
A Transilient Matrix for Moist Convection
(American Meteorological Society, 2011)method is introduced for diagnosing a transilient matrix for moist convection. This transilient matrix quantifies the nonlocal transport of air by convective eddies: for every height z, it gives the distribution of starting ... -
Dynamical Response of the South Asian Monsoon Trough to Latent Heating from Stratiform and Convective Precipitation
(American Meteorological Society, 2011)imulation experiments using a simplified atmospheric GCM and supplementary diagnostic analyses of observations are performed to understand how the South Asian monsoon trough (MT) responds dynamically to latent heating from ... -
A Discrete Ordinate, Multiple Scattering, Radiative Transfer Model of the Venus Atmosphere from 0.1 to 260 μm
(American Meteorological Society, 2011)he authors describe a new radiative transfer model of the Venus atmosphere (RTM) that includes optical properties from nine gases and four cloud modes between 0.1 and 260 ?m. A multiple-stream discrete ordinate flux solver ... -
Microphysics of Premonsoon and Monsoon Clouds as Seen from In Situ Measurements during the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX)
(American Meteorological Society, 2011)nalysis of the microphysical structure of deep convective clouds using in situ measurements during the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX) over the Indian peninsular region is ... -
A Statistical Generalization of the Transformed Eulerian-Mean Circulation for an Arbitrary Vertical Coordinate System
(American Meteorological Society, 2011)new method is derived for approximating the mean meridional circulation in an arbitrary vertical coordinate system using only the time-mean and zonally averaged meridional velocity, meridional eddy transport, and eddy ... -
Fallacies of the Enthalpy Transfer Coefficient over the Ocean in High Winds
(American Meteorological Society, 2011)esoscale and large-scale atmospheric models use a bulk surface flux algorithm to compute the turbulent flux boundary conditions at the bottom of the atmosphere from modeled mean meteorological quantities such as wind speed, ... -
Dynamically Forced Increase of Tropical Upwelling in the Lower Stratosphere
(American Meteorological Society, 2011)rivers of upwelling in the tropical lower stratosphere are investigated using the E39C-A chemistry?climate model. The climatological annual cycle in upwelling and its wave forcing are compared to the interim ECMWF Re-Analysis ... -
A Latent Heat Retrieval and Its Effects on the Intensity and Structure Change of Hurricane Guillermo (1997). Part I: The Algorithm and Observations
(American Meteorological Society, 2011)espite the fact that latent heating in cloud systems drives many atmospheric circulations, including tropical cyclones, little is known of its magnitude and structure, largely because of inadequate observations. In this ... -
The Influence of the Quasi-Biennial Oscillation on the Troposphere in Winter in a Hierarchy of Models. Part II: Perpetual Winter WACCM Runs
(American Meteorological Society, 2011)xperiments with the Whole Atmosphere Community Climate Model (WACCM) are used to understand the influence of the stratospheric tropical quasi-biennial oscillation (QBO) in the troposphere. The zonally symmetric circulation ... -
Nonstationarity in Multifactor Models of Discrete Jump Processes, Memory, and Application to Cloud Modeling
(American Meteorological Society, 2011)ecause of the mathematical and numerical limitations, standard statistical methods known from the literature are not applicable to inferring jump processes under exogenous influence. Such processes can be considered, for ... -
Large-Eddy Simulation of the Stable Boundary Layer with Explicit Filtering and Reconstruction Turbulence Modeling
(American Meteorological Society, 2011)arge-eddy simulation (LES) of the stably stratified atmospheric boundary layer is performed using an explicit filtering and reconstruction approach with a finite difference method. Turbulent stresses are split into the ... -
Orogenic Propagating Precipitation Systems over the United States in a Global Climate Model with Embedded Explicit Convection
(American Meteorological Society, 2011)n the lee of major mountain chains worldwide, diurnal physics of organized propagating convection project onto seasonal and climate time scales of the hydrologic cycle, but this phenomenon is not represented in conventional ... -
Formation and Quasi-Periodic Behavior of Outer Spiral Rainbands in a Numerically Simulated Tropical Cyclone
(American Meteorological Society, 2011)he formation and quasi-periodic behavior of outer spiral rainbands in a tropical cyclone simulated in the cloud-resolving tropical cyclone model version 4 (TCM4) are analyzed. The outer spiral rainbands in the simulation ... -
The Global Atmospheric Circulation Response to Tropical Diabatic Heating Associated with the Madden–Julian Oscillation during Northern Winter
(American Meteorological Society, 2011)he detailed dynamical mechanisms of the upper-tropospheric circulation response to the Madden?Julian oscillation (MJO) convection are examined by integrating a primitive equation model. A series of initial-value calculations ... -
Vertical Structures of Anvil Clouds of Tropical Mesoscale Convective Systems Observed by CloudSat
(American Meteorological Society, 2011)global study of the vertical structures of the clouds of tropical mesoscale convective systems (MCSs) has been carried out with data from the CloudSat Cloud Profiling Radar. Tropical MCSs are found to be dominated by ... -
Finite-Amplitude Wave Activity and Mean Flow Adjustments in the Atmospheric General Circulation. Part II: Analysis in the Isentropic Coordinate
(American Meteorological Society, 2011)he finite-amplitude wave activity diagnostic developed for quasigeostrophic (QG) flows in Part I is extended to the global primitive equation system in the isentropic coordinate. The Rossby wave activity density A is ...