Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1201-1220 of 13215
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Time and Space Scales in the Tropical Cyclone Boundary Layer, and the Location of the Eyewall Updraft
(American Meteorological Society, 2017)AbstractThe transient response of the tropical cyclone boundary layer is studied using linearized and nonlinear models, with particular focus on the frictionally forced vertical motion. The impulsively started, linearized ... -
Cellular Statistical Models of Broken Cloud Fields. Part III: Markovian Properties
(American Meteorological Society, 2017)AbstractIn the third part of the ?Cellular Statistical Models of Broken Cloud Fields? series the cloud statistics formalism developed in the first two parts is interpreted in terms of the theory of Markov processes. The ... -
Corrigendum
(American Meteorological Society, 2017) -
Upscale Impact of Mesoscale Disturbances of Tropical Convection on Synoptic-Scale Equatorial Waves in Two-Dimensional Flows
(American Meteorological Society, 2017)AbstractSuperclusters on the synoptic scale containing mesoscale systems are frequently organized by convectively coupled equatorial waves (CCEWs). Present-day global models struggle to simulate multiscale tropical convection, ... -
A Simple Derivation of Tropical Cyclone Ventilation Theory and Its Application to Capped Surface Entropy Fluxes
(American Meteorological Society, 2017)AbstractIn a recent study, a theory was presented for the dependence of tropical cyclone intensity on the ventilation of dry air by environmental vertical wind shear. This theory was found to successfully capture the ... -
The Semiannual Oscillation of the Tropical Zonal Wind in the Middle Atmosphere Derived from Satellite Geopotential Height Retrievals
(American Meteorological Society, 2017)AbstractThe dominant mode of seasonal variability in the global tropical upper-stratosphere and mesosphere zonal wind is the semiannual oscillation (SAO). However, it is notoriously difficult to measure winds at these ... -
Momentum Flux of Convective Gravity Waves Derived from an Offline Gravity Wave Parameterization. Part I: Spatiotemporal Variations at Source Level
(American Meteorological Society, 2017)AbstractSpatiotemporal variations in momentum flux spectra of convective gravity waves (CGWs) at the source level (cloud top), including nonlinear forcing effects, are examined based on calculations using an offline version ... -
Coherent Structures in Large-Eddy Simulations of a Nonprecipitating Stratocumulus-Topped Boundary Layer
(American Meteorological Society, 2017)AbstractThe properties of coherent convective structures are analyzed in a nonprecipitating marine nocturnal stratocumulus-topped boundary layer (STBL) with a series of high-resolution large-eddy simulations (LESs). A new ... -
Revisiting the Balanced and Unbalanced Aspects of Tropical Cyclone Intensification
(American Meteorological Society, 2017)AbstractThe balanced and unbalanced aspects of tropical cyclone (TC) intensification are revisited with the balanced contribution diagnosed with the outputs from a full-physics model simulation of a TC using the Sawyer?Eliassen ... -
Uncovering the Edge of the Polar Vortex
(American Meteorological Society, 2017)AbstractThe polar vortices play a crucial role in the formation of the ozone hole and can cause severe weather anomalies. Their boundaries, known as the vortex ?edges,? are typically identified via methods that are either ... -
Aerosol–Cloud Interaction in Deep Convective Clouds over the Indian Peninsula Using Spectral (Bin) Microphysics
(American Meteorological Society, 2017)AbstractThe Weather Research and Forecasting (WRF) Model coupled with a spectral bin microphysics (SBM) scheme is used to investigate aerosol effects on cloud microphysics and precipitation over the Indian peninsular region. ... -
The Atmospheric Overturning Induced by Hector the Convector
(American Meteorological Society, 2017)AbstractThe overturning of Hector the Convector, a tropical multicellular convective system of northern Australia that regularly overshoots into the stratosphere, is synthesized at the scale of a large-eddy simulation. The ... -
Sensitivity of Gravity Wave Fluxes to Interannual Variations in Tropical Convection and Zonal Wind
(American Meteorological Society, 2017)AbstractUsing an idealized model framework with high-frequency tropical latent heating variability derived from global satellite observations of precipitation and clouds, the authors examine the properties and effects of ... -
Modeling of Aircraft Measurements of Ice Crystal Concentration in the Arctic and a Parameterization for Mixed-Phase Cloud
(American Meteorological Society, 2017)AbstractIn this study, two parameterizations of ice nucleation rate on dust particles are used in a parcel model to simulate aircraft measurements of ice crystal number concentration Ni in the Arctic. The parcel model has ... -
A Conceptual Model of a Shallow Circulation Induced by Prescribed Low-Level Radiative Cooling
(American Meteorological Society, 2017)AbstractA conceptual bulk model for a dry, convective boundary layer with prescribed horizontally homogeneous and heterogeneous low-level radiative cooling rates is developed. For horizontally homogeneous radiative cooling, ... -
Aircraft Observations of Cumulus Microphysics Ranging from the Tropics to Midlatitudes: Implications for a “New” Secondary Ice Process
(American Meteorological Society, 2017)AbstractIn situ data collected by three research aircraft in four geographical locations are analyzed to determine the relationship between cloud-base temperature, drop size distribution, and the development of supercooled ... -
A Unified Formulation of Radiative Transfer in Plane-Parallel Atmospheres Based on General Decomposition of Radiance. Part II: An Exemplifying Application to the Hemispherical Harmonics Method with Four Components
(American Meteorological Society, 2017)AbstractBased on the unified formulation, the so-called hemispherical harmonics method with four components (HSHM4) is derived following the general procedure described in the first paper of this series. The numerical ... -
Impact of the Diurnal Radiation Cycle on Secondary Eyewall Formation
(American Meteorological Society, 2017)AbstractThe sensitivity of the secondary eyewall formation (SEF) of Hurricane Edouard (2014) to the diurnal solar insolation cycle is examined with convection-permitting simulations. A control run with a real diurnal ... -
Untitled
(American Meteorological Society, 2017)AbstractThe authors have analyzed the scaling behavior of marine boundary layer (MBL) clouds using high-resolution temperature (T) and liquid water content (LWC) fluctuations from aircraft measurements collected over the ... -
Numerical Study of Nocturnal Low-Level Jets over Gently Sloping Terrain
(American Meteorological Society, 2017)AbstractNocturnal low-level jets (LLJs) over gently sloping terrain typical of the U.S. Great Plains are investigated by means of direct numerical simulation. Such LLJs develop in a tilted atmospheric boundary layer as a ...