Journal of the Atmospheric Sciences: Recent submissions
Now showing items 961-980 of 13215
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Northward Propagation, Initiation, and Termination of Boreal Summer Intraseasonal Oscillations in a Zonally Symmetric Model
(American Meteorological Society, 2018)A simple multilayer zonally symmetric model, using a multicloud convective parameterization and coupled to a dynamical bulk atmospheric boundary layer, is used here to simulate boreal summer intraseasonal oscillations ... -
Mountain Volume Control on Deep-Convective Rain Amount during Episodes of Weak Synoptic Forcing
(American Meteorological Society, 2019)Thermally driven upslope flows in mountainous areas provide favorable conditions for diurnal deep moist convection especially during episodes of weak synoptic forcing. The present study investigates the response of deep ... -
Modulation of Mean Wind and Turbulence in the Atmospheric Boundary Layer by Baroclinicity
(American Meteorological Society, 2018)AbstractThis paper investigates the effects of baroclinic pressure gradients on mean flow and turbulence in the diabatic atmospheric boundary layer (ABL). Large-eddy simulations are conducted where the direction of the ... -
AMS Journals Welcome Review Articles
(American Meteorological Society, 2018) -
Isolating the Effects of Moisture Entrainment on Convectively Coupled Equatorial Waves in an Aquaplanet GCM
(American Meteorological Society, 2018)AbstractThe rate of humidity entrainment in the convective parameterization scheme in a general circulation model affects the simulation of convectively coupled waves. However, it is unclear whether this is caused directly ... -
Can the Impact of Aerosols on Deep Convection be Isolated from Meteorological Effects in Atmospheric Observations?
(American Meteorological Society, 2018)AbstractInfluence of pollution on dynamics of deep convection continues to be a controversial topic. Arguably, only carefully designed numerical simulations can clearly separate the impact of aerosols from the effects of ... -
The Boundary Layer Dynamics of Tropical Cyclone Rainbands
(American Meteorological Society, 2018)AbstractSpiral bands are ubiquitous features in tropical cyclones and significantly affect boundary layer thermodynamics, yet knowledge of their boundary layer dynamics is lacking. Prompted by recent work that has shown ... -
Linear Stability of Moist Convecting Atmospheres. Part I: From Linear Response Functions to a Simple Model and Applications to Convectively Coupled Waves
(American Meteorological Society, 2018)AbstractA procedure is presented to systematically construct simple models for the linear stability of moist convecting atmospheres. First, linear response functions of a cumulus ensemble constructed from cloud-system-resolving ... -
Effect of Turbulence on Collisional Growth of Cloud Droplets
(American Meteorological Society, 2018)AbstractWe investigate the effect of turbulence on the collisional growth of micrometer-sized droplets through high-resolution numerical simulations with well-resolved Kolmogorov scales, assuming a collision and coalescence ... -
An Analytical Approach to the Determination of Optimal Perturbations in the Eady Model
(American Meteorological Society, 2018)AbstractWithin the framework of the baroclinic instability Eady model, an analytical approach to the determination of optimal perturbations with a maximum of the energy growth rate or the ratio of the final and initial ... -
Momentum Flux of Convective Gravity Waves Derived from an Offline Gravity Wave Parameterization. Part II: Impacts on the Quasi-Biennial Oscillation
(American Meteorological Society, 2018)AbstractThe characteristics of small-scale convective gravity waves (CGWs; horizontal wavelengths <100 km) and their contributions to the large-scale flow in the stratosphere, including the quasi-biennial oscillation (QBO), ... -
A Simple Model for the Anomalous Counterclockwise Turning of the Surface Wind with Time over the Great Plains of the United States
(American Meteorological Society, 2018)AbstractA recent study found that surface hodographs over the Great Plains of the United States turn in a counterclockwise direction with time. This observed turning is opposite of the clockwise turning observed (and ... -
Surface Superrotation
(American Meteorological Society, 2018)AbstractEquatorial superrotation is commonly observed in simulations of Earth and planetary climates, but it is almost without exception found to occur only at upper levels, with zero or easterly winds at the surface. ... -
Broadening of Cloud Droplet Spectra through Eddy Hopping: Turbulent Entraining Parcel Simulations
(American Meteorological Society, 2018)AbstractThis paper discusses the effects of cloud turbulence, turbulent entrainment, and entrained cloud condensation nuclei (CCN) activation on the evolution of the cloud droplet size spectrum. We simulate an ensemble of ... -
A Stochastic Lagrangian Basis for a Probabilistic Parameterization of Moisture Condensation in Eulerian Models
(American Meteorological Society, 2018)AbstractIn this paper, we describe the construction of an efficient probabilistic parameterization that could be used in a coarse-resolution numerical model in which the variation of moisture is not properly resolved. An ... -
Multiscale Atmospheric Overturning of the Indian Summer Monsoon as Seen through Isentropic Analysis
(American Meteorological Society, 2018)AbstractThis study investigates multiscale atmospheric overturning during the 2009 Indian summer monsoon (ISM) using a cloud-permitting numerical model. The isentropic analysis technique adopted here sorts vertical mass ... -
Simulated Kelvin–Helmholtz Waves over Terrain and Their Microphysical Implications
(American Meteorological Society, 2018)AbstractTwo Kelvin?Helmholtz (KH) wave events over western Washington State were simulated and evaluated using observations from the Olympic Mountains Experiment (OLYMPEX) field campaign. The events, 12 and 17 December ... -
Secondary Ice Formation during Freezing of Levitated Droplets
(American Meteorological Society, 2018)AbstractThe formation of secondary ice in clouds, that is, ice particles that are created at temperatures above the limit for homogeneous freezing without the direct involvement of a heterogeneous ice nucleus, is one of ... -
Corrigendum
(American Meteorological Society, 2018) -
A Dynamical Mechanism for Secondary Eyewall Formation in Tropical Cyclones
(American Meteorological Society, 2018)AbstractThis study proposes that secondary eyewall formation (SEF) of tropical cyclones (TCs) can be attributed to an instability of flow in the free atmosphere coupled with Ekman pumping. Unstable solutions of a 1.5-layer ...