Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2101-2120 of 13215
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Response of Tropical Deep Convection to Localized Heating Perturbations: Implications for Aerosol-Induced Convective Invigoration
(American Meteorological Society, 2013)cloud-system-resolving model is used to investigate the effects of localized heating/cooling perturbations on tropical deep convection, in the context of the aerosol ?invigoration effect.? This effect supposes that a ... -
The Application of Nonlinear Local Lyapunov Vectors to Ensemble Predictions in Lorenz Systems
(American Meteorological Society, 2014)onlinear local Lyapunov vectors (NLLVs) are developed to indicate orthogonal directions in phase space with different perturbation growth rates. In particular, the first few NLLVs are considered to be an appropriate ... -
Sensitivities of the Lower-Stratospheric Transport and Mixing to Tropical SST Heating
(American Meteorological Society, 2014)he sensitivities of the Brewer?Dobson circulation (BDC) to different distributions of tropical SST heating are investigated in an idealized aquaplanet model. It is found that an increase in tropical SSTs generally leads ... -
First-Passage-Time Prototypes for Precipitation Statistics
(American Meteorological Society, 2014)rototype models are presented for time series statistics of precipitation and column water vapor. In these models, precipitation events begin when the water vapor reaches a threshold value and end when it reaches a slightly ... -
Microphysical and Dynamical Characteristics of Low-Precipitation and Classic Supercells
(American Meteorological Society, 2014)he sensitivity of supercell morphology to the vertical distribution of moisture is investigated in this study using a cloud-resolving model with 300-m horizontal grid spacing. Simulated storms are found to transition from ... -
Influence of Cloud–Radiative Forcing on Tropical Cyclone Structure
(American Meteorological Society, 2013)he authors demonstrate how and why cloud?radiative forcing (CRF), the interaction of hydrometeors with longwave and shortwave radiation, can influence tropical cyclone structure through ?semi idealized? integrations of the ... -
The Vorticity Budgets of North Atlantic Winter Extratropical Cyclone Life Cycles in MERRA Reanalysis. Part II: Decaying Phase
(American Meteorological Society, 2014)he role of physical forcing mechanisms that contribute to the decay of winter North Atlantic extratropical cyclones during the period 1979?2009 are examined using the Modern-Era Retrospective Analysis for Research and ... -
The Vorticity Budgets of North Atlantic Winter Extratropical Cyclone Life Cycles in MERRA Reanalysis. Part I: Development Phase
(American Meteorological Society, 2014)his series of papers (parts I and II) examines the vorticity budgets of winter North Atlantic extratropical cyclones during the period 1979?2009 using the Modern-Era Retrospective Analysis for Research and Application ... -
Characteristics of Convective Processes and Vertical Vorticity from the Tropical Wave to Tropical Cyclone Stage in a High-Resolution Numerical Model Simulation of Tropical Cyclone Fay (2008)
(American Meteorological Society, 2013)he statistics of convective processes and vertical vorticity from the tropical wave to tropical cyclone stage are examined in a high-resolution simulation of Tropical Cyclone Fay (2008). The intensity of vertical velocity ... -
Role of Cumulus Congestus in Tropical Cyclone Formation in a High-Resolution Numerical Model Simulation
(American Meteorological Society, 2014)he role of cumulus congestus (shallow and congestus convection) in tropical cyclone (TC) formation is examined in a high-resolution simulation of Tropical Cyclone Fay (2008). It is found that cumulus congestus plays a ... -
Parametric Estimation of the Stochastic Dynamics of Sea Surface Winds
(American Meteorological Society, 2014)n this study, the parameters of a stochastic?dynamical model of sea surface winds are estimated from long time series of sea surface wind observational data. The model was introduced by A. H. Monahan, who developed an ... -
Evaluation of Precipitating Hydrometeor Parameterizations in a Single-Moment Bulk Microphysics Scheme for Deep Convective Systems over the Tropical Central Pacific
(American Meteorological Society, 2014)loud microphysics of deep convective systems over the tropical central Pacific simulated by a cloud system?resolving model using satellite simulators are evaluated in terms of the joint histogram of cloud-top temperature ... -
Stability and Charging Characteristics of the Comma Head Region of Continental Winter Cyclones
(American Meteorological Society, 2013)his paper presents analyses of the finescale structure of convection in the comma head of two continental winter cyclones and a 16-storm climatology analyzing the distribution of lightning within the comma head. A case ... -
Three-Dimensional Structure and Evolution of the MJO and Its Relation to the Mean Flow
(American Meteorological Society, 2014)he two leading principal components of the daily 850- minus 150-hPa global velocity potential in the Interim European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-Interim) (1979?2011) data are used ... -
Diurnal Spatial Variability of Great Plains Summer Precipitation Related to the Dynamics of the Low-Level Jet
(American Meteorological Society, 2014)iurnal variations of the Great Plains low-level jet (GPLLJ) and vertical motions have been related to the development of summer precipitation individually, but their underlying connection and consequences for the nocturnal ... -
Observations of the Variation in Aerosol and Cloud Microphysics along the 20°S Transect on 13 November 2008 during VOCALS-REx
(American Meteorological Society, 2014)bservations are presented of the structure of the marine boundary layer (MBL) in the southeastern Pacific made with the U.K. BAe 146 aircraft on 13 November 2008 as it flew at a variety of altitudes along 20°S between the ... -
Vertical Velocity and Physical Structure of Generating Cells and Convection in the Comma Head Region of Continental Winter Cyclones
(American Meteorological Society, 2014)he vertical motion and physical structure of elevated convection and generating cells within the comma heads of three continental winter cyclones are investigated using the Wyoming W-band cloud radar mounted on the National ... -
Reynolds Stress and Eddy Diffusivity of β-Plane Shear Flows
(American Meteorological Society, 2014)he Reynolds stress induced by anisotropically forcing an unbounded Couette flow, with uniform shear ?, on a ? plane, is calculated in conjunction with the eddy diffusivity of a coevolving passive tracer. The flow is damped ... -
Gross Moist Stability and MJO Simulation Skill in Three Full-Physics GCMs
(American Meteorological Society, 2014)revious studies have demonstrated a link between gross moist stability (GMS) and intraseasonal variability in theoretical and reduced-complexity models. In such simplified models, MJO-like moisture modes?convectively coupled ... -
Toward Multiscale Simulation of Moist Flows with Soundproof Equations
(American Meteorological Society, 2013)his paper discusses the incorporation of phase changes of the water substance that accompany moist atmospheric flows into the all-scale atmospheric model based on soundproof equations. A specific issue involves developing ...