Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2301-2320 of 13215
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On the Initial Development of Asymmetric Vertical Motion and Horizontal Relative Flow in a Mature Tropical Cyclone Embedded in Environmental Vertical Shear
(American Meteorological Society, 2013)n this paper, the authors focus on the initial development of asymmetric vertical motion and horizontal relative flow in a mature tropical cyclone (TC) embedded in an environmental vertical shear. The fully compressible, ... -
Doubling–Adding Method for Delta-Four-Stream Spherical Harmonic Expansion Approximation in Radiative Transfer Parameterization
(American Meteorological Society, 2013)hough the single-layer solutions have been found for the δ-four-stream spherical harmonic expansion method (SHM) in radiative transfer, there is lack of a corresponding doubling?adding method (4SDA), which enables the ... -
A Unified Representation of Deep Moist Convection in Numerical Modeling of the Atmosphere. Part I
(American Meteorological Society, 2013)generalized framework for cumulus parameterization applicable to any horizontal resolution between those typically used in general circulation and cloud-resolving models is presented. It is pointed out that the key parameter ... -
A Revised Conceptual Model of the Tropical Marine Boundary Layer. Part III: Bragg Scattering Layer Statistical Properties
(American Meteorological Society, 2013)his paper examines the structure and variability of the moisture field in the tropical marine boundary layer (TMBL) as defined by Bragg scattering layers (BSLs) observed with S-band radar. Typically, four to five BSLs were ... -
A Revised Conceptual Model of the Tropical Marine Boundary Layer. Part II: Detecting Relative Humidity Layers Using Bragg Scattering from S-Band Radar
(American Meteorological Society, 2013)ersistent layers of enhanced equivalent radar reflectivity factor and reduced spectral width were commonly observed within cloud-free regions of the tropical marine boundary layer (TMBL) with the National Center for ... -
The Diurnal Cycle of Cloud-Top Height and Cloud Cover over the Southeastern Pacific as Observed by GOES-10
(American Meteorological Society, 2013)he diurnal cycles in cloud-top height Htop and cloud fraction (CF) in the southeastern Pacific stratocumulus region were determined for October?November 2008 by analyzing data from Geostationary Operational Environmental ... -
Baroclinic Instability of the Silk Road Pattern Induced by Thermal Damping
(American Meteorological Society, 2013)n this paper, the internal dynamics of the Silk Road pattern has been studied. Since observation indicates that the Silk Road pattern could be considered as stationary external Rossby waves, the quasigeostrophic three-layer ... -
A Revised Conceptual Model of the Tropical Marine Boundary Layer. Part I: Statistical Characterization of the Variability Inherent in the Wintertime Trade Wind Regime over the Western Tropical Atlantic
(American Meteorological Society, 2013)his paper investigates wintertime tropical marine boundary layer (TMBL) statistical characteristics over the western North Atlantic using the complete set of island-launched soundings from the Rain in Cumulus over the Ocean ... -
Understanding Convective Extreme Precipitation Scaling Using Observations and an Entraining Plume Model
(American Meteorological Society, 2013)reviously observed twice-Clausius?Clapeyron (2CC) scaling for extreme precipitation at hourly time scales has led to discussions about its origin. The robustness of this scaling is assessed by analyzing a subhourly dataset ... -
Essential Dynamics of Secondary Eyewall Formation
(American Meteorological Society, 2013)he authors conduct an analysis of the dynamics of secondary eyewall formation in two modeling frameworks to obtain a more complete understanding of the phenomenon. The first is a full-physics, three-dimensional mesoscale ... -
A Method for Adaptive Habit Prediction in Bulk Microphysical Models. Part III: Applications and Studies within a Two-Dimensional Kinematic Model
(American Meteorological Society, 2013)rctic mixed-phase clouds are ubiquitous, and the persistence of supercooled liquid is not well understood. Prior studies of mixed-phase clouds predict a single axis length assuming spherical particles or mass?dimensional ... -
Evolution of the Population of Precipitating Convective Systems over the Equatorial Indian Ocean in Active Phases of the Madden–Julian Oscillation
(American Meteorological Society, 2013)hree-dimensional radar reflectivity fields from a dual-wavelength Doppler polarimetric radar (S-PolKa) deployed in the equatorial Indian Ocean are used to evaluate the composition of the population of convective cloud ... -
Reflection of Barotropic Rossby Waves in Sheared Flow and Validity of the WKB Approximation
(American Meteorological Society, 2013)he authors discuss reflection of barotropic Rossby waves in an idealized framework with potential applications to tropical?extratropical and interhemispheric interactions. Meridional propagation of Rossby waves has often ... -
Simple Solutions to Steady-State Cumulus Regimes in the Convective Boundary Layer
(American Meteorological Society, 2013)modeling framework is developed that extends the mixed-layer model to steady-state cumulus convection. The aim is to consider the simplest model that retains the essential behavior of cumulus-capped layers. The presented ... -
Kinematics of Eddy–Mean Flow Interaction in an Idealized Atmospheric Model
(American Meteorological Society, 2013)he authors analyze atmospheric variability simulated in a two-layer baroclinic ?-channel quasigeostrophic model by combining Eulerian and feature-tracking analysis approaches. The leading mode of the model's low-frequency ... -
Methods for Estimating Climate Anomaly Forcing Patterns
(American Meteorological Society, 2013)nverse methods for determining the anomalous mean forcing functions responsible for climate change are investigated. First, an iterative method is considered, and it is shown to successfully reproduce forcing functions for ... -
Tropical–Extratropical Interactions of Intraseasonal Oscillations
(American Meteorological Society, 2013)ropical?extratropical interactions of intraseasonal oscillations (ISOs), based on 30 years (1979?2009) of northern winter observations and theory, are compared. The phase relationships between the tropical signal of the ... -
Maintenance of the Stratospheric Structure in an Idealized General Circulation Model
(American Meteorological Society, 2013)his work explores the maintenance of the stratospheric structure in a primitive equation model that is forced by a Newtonian cooling with a prescribed radiative equilibrium temperature field. Models such as this are well ... -
Jet Interaction and the Influence of a Minimum Phase Speed Bound on the Propagation of Eddies
(American Meteorological Society, 2013)he feedback between planetary-scale eddies and analogs of the midlatitude eddy-driven jet and the subtropical jet is investigated in a barotropic ?-plane model. In the model the subtropical jet is generated by a relaxation ... -
Typhoon-Position-Oriented Sensitivity Analysis. Part I: Theory and Verification
(American Meteorological Society, 2013)new sensitivity analysis method is proposed for the ensemble prediction system in which a tropical cyclone (TC) position is taken as a metric. Sensitivity is defined as a slope of linear regression (or its approximation) ...