Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3321-3340 of 13215
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Freezing Drizzle Formation in Stably Stratified Layer Clouds. Part II: The Role of Giant Nuclei and Aerosol Particle Size Distribution and Solubility
(American Meteorological Society, 2005)This paper investigates how the characteristics of aerosol particles (size distribution and solubility) as well as the presence of giant nuclei affect drizzle formation in stably stratified layer clouds. A new technique ... -
Impact of Aerosol Intrusions on Arctic Boundary Layer Clouds. Part I: 4 May 1998 Case
(American Meteorological Society, 2005)The objective of this paper is to assess the impact of the entrainment of aerosol from above the inversion on the microphysical structure and radiative properties of boundary layer clouds. For that purpose, the Los Alamos ... -
Cell Broadening Revisited: Results from High-Resolution Large-Eddy Simulations of Cold Air Outbreaks
(American Meteorological Society, 2005)Large-eddy simulations (LES) have been carried out in order to investigate the structure and development of organized mesoscale cellular convection (MCC) during cold air outbreaks (CAOB) and to reevaluate results by Müller ... -
Internal Atmospheric Dynamics and Tropical Indo-Pacific Climate Variability
(American Meteorological Society, 2005)One possible explanation for tropical sea surface temperature (SST) interannual variability is that it can be accurately described by a linear autoregressive model with damped coupled feedbacks and stochastic forcing. This ... -
Simulations of the Atmospheric General Circulation Using a Cloud-Resolving Model as a Superparameterization of Physical Processes
(American Meteorological Society, 2005)Traditionally, the effects of clouds in GCMs have been represented by semiempirical parameterizations. Recently, a cloud-resolving model (CRM) was embedded into each grid column of a realistic GCM, the NCAR Community ... -
Bimodal Behavior in the Zonal Mean Flow of a Baroclinic β-Channel Model
(American Meteorological Society, 2005)The dynamical origin of midlatitude zonal-jet variability is examined in a thermally forced, quasigeostrophic, two-layer channel model on a ? plane. The model?s behavior is studied as a function of the bottom-friction ... -
Reliability of ENSO Dynamical Predictions
(American Meteorological Society, 2005)In this study, ensemble predictions were constructed using two realistic ENSO prediction models and stochastic optimals. By applying a recently developed theoretical framework, the authors have explored several important ... -
On Weak Zonally Symmetric ENSO Atmospheric Heating and the Strong Zonally Symmetric ENSO Air Temperature Response
(American Meteorological Society, 2005)Observations show that regions of anomalous deep convective El Niño?Southern Oscillation (ENSO) heating tend to be balanced by anomalous ENSO cooling elsewhere so that, averaged around the globe from (say) 10°S to 10°N, ... -
Southern Hemisphere Annular Mode Variability and the Role of Optimal Nonmodal Growth
(American Meteorological Society, 2005)The southern annular mode is the leading mode of Southern Hemisphere circulation variability, the temporal evolution of which is characterized by large amplitudes and significant persistence. Previous investigators have ... -
A New Double-Moment Microphysics Parameterization for Application in Cloud and Climate Models. Part I: Description
(American Meteorological Society, 2005)A new double-moment bulk microphysics scheme predicting the number concentrations and mixing ratios of four hydrometeor species (droplets, cloud ice, rain, snow) is described. New physically based parameterizations are ... -
Impact of Cloud Cover on Solar Radiative Biases in Deep Convective Regimes
(American Meteorological Society, 2005)Conflicting claims have been made concerning the magnitude of the bias in solar radiative transfer calculations when horizontal photon transport is neglected for deep convective scenarios. The difficulty of obtaining a ... -
A New Double-Moment Microphysics Parameterization for Application in Cloud and Climate Models. Part II: Single-Column Modeling of Arctic Clouds
(American Meteorological Society, 2005)The new double-moment microphysics scheme described in Part I of this paper is implemented into a single-column model to simulate clouds and radiation observed during the period 1 April?15 May 1998 of the Surface Heat ... -
Low-Order Stochastic Mode Reduction for a Realistic Barotropic Model Climate
(American Meteorological Society, 2005)This study applies a systematic strategy for stochastic modeling of atmospheric low-frequency variability to a realistic barotropic model climate. This barotropic model climate has reasonable approximations of the Arctic ... -
Control Parameters for the Influence of a Mesoscale Mountain Range on Cyclone Track Continuity and Deflection
(American Meteorological Society, 2005)In this study prospective control parameters are identified for diagnosing the continuity and deflection of cyclone tracks across a mesoscale mountain range. Based on idealized simulations of a westward-moving cyclone, it ... -
Lagrangian Particle Dispersion Modeling of the Fumigation Process Using Large-Eddy Simulation
(American Meteorological Society, 2005)A Lagrangian particle dispersion model (LPDM) is used to study fumigation of pollutants in and above the entrainment zone into a growing convective boundary layer. Probability density functions of particle location with ... -
A Simple Parameterization Coupling the Convective Daytime Boundary Layer and Fair-Weather Cumuli
(American Meteorological Society, 2005)A new parameterization for boundary layer cumulus clouds, called the cumulus potential (CuP) scheme, is introduced. This scheme uses joint probability density functions (JPDFs) of virtual potential temperature (??) and ... -
Sea Spray Impacts on Intensifying Midlatitude Cyclones
(American Meteorological Society, 2005)Air?sea transfer processes over the ocean strongly affect how hurricanes develop. High winds generate large amounts of sea spray, which can modify the transfer of momentum, heat, and moisture across the air?sea interface. ... -
The Planetary- and Synoptic-Scale Interactions in a Southeast Pacific Blocking Episode Using PV Diagnostics
(American Meteorological Society, 2005)The synoptic- and planetary-scale forcing in two blocking anticyclones occurring over the southeast Pacific Ocean was examined using potential vorticity diagnostics. While many studies have examined the dynamic and ... -
The Role of Relative Humidity in Radiative–Convective Equilibrium
(American Meteorological Society, 2005)The following conditions are derived for the existence of a radiation limit of tropospheric origin in a nongray atmosphere, extending the work on a gray atmosphere by Nakajima et al.: 1) the atmosphere must become sufficiently ... -
Linear and Nonlinear Signatures in the Planetary Wave Dynamics of an AGCM: Phase Space Tendencies
(American Meteorological Society, 2005)To identify and quantify indications of linear and nonlinear planetary wave behavior, characteristics of a very long integration of an atmospheric general circulation model in a four-dimensional phase space are examined. ...