Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1561-1580 of 13215
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Effect of Stratiform Heating on the Planetary-Scale Organization of Tropical Convection
(American Meteorological Society, 2015)t is widely recognized that stratiform heating contributes significantly to tropical rainfall and to the dynamics of tropical convective systems by inducing a front-to-rear tilt in the heating profile. Precipitating ... -
CORRIGENDUM
(American Meteorological Society, 2015) -
Intraseasonal Variability of the Zonal-Mean Extratropical Tropopause: The Role of Changes in Polar Vortex Strength and Upper-Troposphere Wave Breaking
(American Meteorological Society, 2016)principal component analysis of the Northern Hemisphere extratropical zonal-mean tropopause variability at intraseasonal time scales is presented in this work. Wavy deformations of the tropopause dominate this variability ... -
The Dissipation of Trapped Lee Waves. Part II: The Relative Importance of the Boundary Layer and the Stratosphere
(American Meteorological Society, 2015)ecaying trapped waves exert a drag on the large-scale flow. The two most studied mechanisms for such decay are boundary layer dissipation and leakage into the stratosphere. If the waves dissipate in the boundary layer, ... -
The Poleward Motion of Extratropical Cyclones from a Potential Vorticity Tendency Analysis
(American Meteorological Society, 2016)he poleward propagation of midlatitude storms is studied using a potential vorticity (PV) tendency analysis of cyclone-tracking composites, in an idealized zonally symmetric moist GCM. A detailed PV budget reveals the ... -
The Longitudinal Variation of Equatorial Waves due to Propagation on a Varying Zonal Flow
(American Meteorological Society, 2015)he general 1D theory of waves propagating on a zonally varying flow is developed from basic wave theory, and equations are derived for the variation of wavenumber and energy along ray paths. Different categories of behavior ... -
The MJO as a Dispersive, Convectively Coupled Moisture Wave: Theory and Observations
(American Meteorological Society, 2015)linear wave theory for the Madden?Julian oscillation (MJO), previously developed by Sobel and Maloney, is extended upon in this study. In this treatment, column moisture is the only prognostic variable and the horizontal ... -
Dynamics of Rossby Wave Packets in a Quantitative Potential Vorticity–Potential Temperature Framework
(American Meteorological Society, 2015)ossby wave packets (RWPs) have been associated with increased atmospheric predictability but also with the growth and propagation of forecast uncertainty. To address the important question of under which conditions RWPs ... -
Quadrant-Dependent Evolution of Low-Level Tangential Wind of a Tropical Cyclone in the Shear Flow
(American Meteorological Society, 2015)his study investigates the quadrant-by-quadrant evolution of the low-level tangential wind near the eyewall of an idealized simulated mature tropical cyclone embedded in a unidirectional shear flow. It is found that the ... -
Nonlinear Response of a Tropical Cyclone Vortex to Prescribed Eyewall Heating with and without Surface Friction in TCM4: Implications for Tropical Cyclone Intensification
(American Meteorological Society, 2015)he recent debate on whether surface friction contributes positively or negatively to tropical cyclone (TC) intensification has been clarified based on two idealized numerical experiments, one without and the other with ... -
The Role of Vertically Propagating Gravity Waves Forced by Melting-Induced Cooling in the Formation and Evolution of Wide Cold-Frontal Rainbands
(American Meteorological Society, 2016)ealistic mesoscale model simulations using the Weather Research and Forecasting (WRF) Model and idealized dry simulations were used to study the mechanisms responsible for the formation and evolution of wide cold-frontal ... -
On the Dynamics of the Formation of the Kelvin Cat’s-Eye in Tropical Cyclogenesis. Part I: Climatological Investigation
(American Meteorological Society, 2016)otivated by Dunkerton et al., a climatological study of 54 developing easterly waves in 1998?2001 was performed. Time-lagged composites in a translating reference frame following the disturbances indicate a weak meridional ... -
Why Do Model Tropical Cyclones Grow Progressively in Size and Decay in Intensity after Reaching Maturity?
(American Meteorological Society, 2015)he long-term behavior of tropical cyclones in the prototype problem for cyclone intensification on an f plane is examined using a nonhydrostatic, three-dimensional numerical model. After reaching a mature intensity, the ... -
A Stochastic Model for Diagnosing Subtropical Humidity Dynamics with Stable Isotopologues of Water Vapor
(American Meteorological Society, 2016)he humidity of the free troposphere can be modeled, to first order, in terms of cold-point dehydration, followed by moistening via mixing with boundary layer air. The relative balance between these processes is of prime ... -
A Bayesian Examination of Deep Convective Squall-Line Sensitivity to Changes in Cloud Microphysical Parameters
(American Meteorological Society, 2015)eep convective cloud content, precipitation distribution and rate, dynamics, and radiative fluxes are known to be sensitive to the details of liquid- and ice-phase cloud microphysical processes. Previous studies have ... -
A Multiscale Model for the Intraseasonal Impact of the Diurnal Cycle over the Maritime Continent on the Madden–Julian Oscillation
(American Meteorological Society, 2015)he eastward-propagating Madden?Julian oscillation (MJO) typically exhibits complex behavior during its passage over the Maritime Continent, sometimes slowly propagating eastward and other times stalling and even terminating ... -
Extratropical Impacts on Atlantic Tropical Cyclone Activity
(American Meteorological Society, 2016)ith warm sea surface temperature (SST) anomalies in the tropical Atlantic and cold SST anomalies in the east Pacific, the unusually quiet hurricane season in 2013 was a surprise to the hurricane community. The authors? ... -
Convectively Coupled Kelvin Waves: From Linear Theory to Global Models
(American Meteorological Society, 2015)he authors analyze composite structures of tropical convectively coupled Kelvin waves (CCKWs) in terms of the theory of Raymond and Fuchs using radiosonde data, 3D analysis and reanalysis model output, and annual integrations ... -
Sensitivity Study on the Influence of Cloud Microphysical Parameters on Mixed-Phase Cloud Thermodynamic Phase Partitioning in CAM5
(American Meteorological Society, 2015)he influence of six CAM5.1 cloud microphysical parameters on the variance of phase partitioning in mixed-phase clouds is determined by application of a variance-based sensitivity analysis. The sensitivity analysis is based ... -
Response of Atmospheric Convection to Vertical Wind Shear: Cloud-System-Resolving Simulations with Parameterized Large-Scale Circulation. Part II: Effect of Interactive Radiation
(American Meteorological Society, 2015)he authors investigate the effects of cloud?radiation interaction and vertical wind shear on convective ensembles interacting with large-scale dynamics in cloud-resolving model simulations, with the large-scale circulation ...