Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2041-2060 of 13215
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Climatology and Dynamics of the Summer Etesian Winds over the Eastern Mediterranean
(American Meteorological Society, 2013)he Etesians are persistent northerly winds that prevail over the eastern Mediterranean during summer. A climatology of Etesian outbreaks over the Aegean was compiled with the aid of the 40-yr ECMWF Re-Analysis (ERA-40) ... -
Eastward-Propagating Intraseasonal Oscillation Represented by Chikira–Sugiyama Cumulus Parameterization. Part I: Comparison with Observation and Reanalysis
(American Meteorological Society, 2013)he eastward-propagating intraseasonal oscillation represented by the Chikira?Sugiyama cumulus parameterization in an atmospheric general circulation model is compared with observations and reanalyses. The scheme is ... -
Triggering Deep Convection with a Probabilistic Plume Model
(American Meteorological Society, 2014)model unifying the representation of the planetary boundary layer and dry, shallow, and deep convection, the probabilistic plume model (PPM), is presented. Its capacity to reproduce the triggering of deep convection over ... -
Equation for the Microwave Backscatter Cross Section of Aggregate Snowflakes Using the Self-Similar Rayleigh–Gans Approximation
(American Meteorological Society, 2014)n this paper an equation is derived for the mean backscatter cross section of an ensemble of snowflakes at centimeter and millimeter wavelengths. It uses the Rayleigh?Gans approximation, which has previously been found to ... -
Reply to “Comments on ‘Symmetric and Asymmetric Structures of Hurricane Boundary Layer in Coupled Atmosphere–Wave–Ocean Models and Observations’”
(American Meteorological Society, 2014) -
The Generation of Near-Cloud Turbulence in Idealized Simulations
(American Meteorological Society, 2014)his study explores the generation of turbulence in the upper outflow regions of simulated idealized mesoscale convective systems. The simulated storms are shown to generate parameterized turbulence that occurs significant ... -
On the Role of Asymmetric Convective Bursts to the Problem of Hurricane Intensification: Radiation of Vortex Rossby Waves and Wave–Mean Flow Interactions
(American Meteorological Society, 2014)he role of asymmetric convection to the intensity change of a weak vortex is investigated with the aid of a ?dry? thermally forced model. Numerical experiments are conducted, starting with a weak vortex forced by a localized ... -
The Influence of an SST Front on a Heavy Rainfall Event over Coastal Taiwan during TiMREX
(American Meteorological Society, 2014)long-lived heavy precipitation area was observed along the southwest coast of Taiwan from 13 to 18 June 2008 during the Terrain-Influenced Monsoon Rainfall Experiment (TiMREX). Rainfall amounts exceeded 500 mm along portions ... -
Variability of Regional TOA Flux Diurnal Cycle Composites at the Monthly Time Scale
(American Meteorological Society, 2014)iurnal variability is a fundamental component of Earth?s climate system. Clouds, temperature, and precipitation exhibit robust responses to the daily cycle of solar insolation. Recent work indicates significant variability ... -
Usual Approximations to the Equations of Atmospheric Motion: A Variational Perspective
(American Meteorological Society, 2014)he usual geophysical approximations are reframed within a variational framework. Starting from the Lagrangian of the fully compressible Euler equations expressed in a general curvilinear coordinates system, Hamilton?s ... -
Effective Isentropic Diffusivity of Tropospheric Transport
(American Meteorological Society, 2014)ropospheric transport can be described qualitatively by the slow mean diabatic circulation and rapid isentropic mixing, yet a quantitative understanding of the transport circulation is complicated, as nearly half of the ... -
A Formal Analysis of the Feedback Concept in Climate Models. Part II: Tangent Linear Systems in GCMs
(American Meteorological Society, 2014)limate analysis is greatly simplified in perturbation analysis when filtered anomalies show linear behavior. In the first part (part I) of this two-part analysis, the formal tangent linear system (TLS) that handles linear ... -
What Is the Source of the Stratospheric Gravity Wave Belt in Austral Winter?
(American Meteorological Society, 2014)uring austral winter, and away from orographic maxima or ?hot spots,? stratospheric gravity waves in both satellite observations and Interim European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-Interim) ... -
Pseudo-Orbit Data Assimilation. Part II: Assimilation with Imperfect Models
(American Meteorological Society, 2013)ata assimilation and state estimation for nonlinear models is a challenging task mathematically. Performing this task in real time, as in operational weather forecasting, is even more challenging as the models are imperfect: ... -
Benefits of a Fourth Ice Class in the Simulated Radar Reflectivities of Convective Systems Using a Bulk Microphysics Scheme
(American Meteorological Society, 2014)urrent cloud microphysical schemes used in cloud and mesoscale models range from simple one-moment to multimoment, multiclass to explicit bin schemes. This study details the benefits of adding a fourth ice class (frozen ... -
A Lagrangian Analysis of the Northern Hemisphere Subtropical Jet
(American Meteorological Society, 2014)his study presents a 5-yr climatology of 7-day back trajectories started from the Northern Hemisphere subtropical jet. These trajectories provide insight into the seasonally and regionally varying angular momentum and ... -
The Plant–Craig Stochastic Convection Scheme in ICON and Its Scale Adaptivity
(American Meteorological Society, 2014)he emergence of numerical weather prediction and climate models with multiple or variable resolutions requires that their parameterizations adapt correctly, with consistent increases in variability as resolution increases. ... -
An Improved Weak Pressure Gradient Scheme for Single-Column Modeling
(American Meteorological Society, 2014)new formulation of the weak pressure gradient approximation (WPG) is introduced for parameterizing large-scale dynamics in limited-domain atmospheric models. This new WPG is developed in the context of the one-dimensional, ... -
A Diagnosis of the Seasonally and Longitudinally Varying Midlatitude Circulation Response to Global Warming
(American Meteorological Society, 2014)onal-mean or basin-mean analyses often conclude that the midlatitude circulation will undergo a poleward shift with global warming. In this study, the models from phase 5 of the Coupled Model Intercomparison Project are ... -
Pseudo-Orbit Data Assimilation. Part I: The Perfect Model Scenario
(American Meteorological Society, 2013)tate estimation lies at the heart of many meteorological tasks. Pseudo-orbit-based data assimilation provides an attractive alternative approach to data assimilation in nonlinear systems such as weather forecasting models. ...