Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1301-1320 of 13215
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Reply to “Comments on ‘On the Choice of Average Solar Zenith Angle’’’
(American Meteorological Society, 2017)he solar zenith angle controls local insolation and also affects the partitioning of insolation into planetary reflection, atmospheric absorption, and surface absorption. Because of this role of the solar zenith angle in ... -
Wave-mean flow interactions in moist baroclinic life cycles
(American Meteorological Society, 2017)revious studies show that the moist Eliassen-Palm (EP) flux captures a greater eddy momentum exchange through form drag than the dry EP flux in the midlatitude climate. This suggests that the eddy moisture flux acts to ... -
On the Tropical Atmospheric Signature of El Niño
(American Meteorological Society, 2017)he linear atmospheric signature of ENSO, obtained by regressing fields of geopotential height Z, wind, vertical velocity, and rainfall upon the Niño 3.4 sea surface temperature (SST) index, is partitioned into zonally ... -
Aerosol and Droplet Dependent Contact Freezing: Parameterisation Development and Case Study
(American Meteorological Society, 2017)parameterisation for contact freezing is presented, which combines theoretical expressions for determining the collision efficiency with experimentally determined freezing efficiency results. The parameterisation has ... -
Secondary Eyewall Formation in Tropical Cyclones by Outflow-Jet-Interaction
(American Meteorological Society, 2017)his study uses idealized numerical simulations to show that the interaction between tropical cyclones and a mid-latitude jet can result in secondary eyewall formation. It is argued that the eddy activity by the outflow-jet ... -
Understanding the Revival of the Indian Summer Monsoon after Breaks
(American Meteorological Society, 2017)n this paper, the authors suggest a dynamical mechanism involved in the revival of the summer monsoon after breaks. In this context, the authors carry out a diagnostic analysis using the datasets from National Centers for ... -
Tropospheric Waveguide Teleconnections and Their Seasonality
(American Meteorological Society, 2017)ne-point correlation maps of the subseasonal variability of 200-hPa meridional wind in nature and an atmospheric general circulation model are systematically analyzed to quantify the impact of the climatological-mean jets ... -
Atmospheric boundary layer turbulence closure scheme for wind-following swell conditions
(American Meteorological Society, 2017)ver the ocean, atmospheric boundary layer turbulence can be altered by underlying waves. Under swell conditions, the impact of waves on the atmosphere is more complicated compared that under wind-wave conditions. Based on ... -
Sensitivity of Tropical Cyclone Intensification to Axisymmetric Heat Sources: The Role of Inertial Stability
(American Meteorological Society, 2017)his study examines the influences of an axisymmetric heat source on the tangential wind structure of a tropical cyclone (TC). Specifically, the response of a TC due to the effect of convection located in varying inertial ... -
‘Near-ground’ vertical vorticity in supercell thunderstorm models
(American Meteorological Society, 2017)umerical models of supercell thunderstorms produce near-ground rotation about a vertical axis (i.e., vertical vorticity) after the development of raincooled outflows and downdrafts. The physical processes involved in the ... -
Formation and Maintenance of a Long-Lived Taiwan Rainband during 1–3 March 2003
(American Meteorological Society, 2017)aiwan rainbands (TRs), defined here as convective lines, which form off the mountainous eastern coast of Taiwan under weakly synoptically forced weather conditions, are a well-known mesoscale phenomenon, but their formative ... -
Sequential Factor Separation for the Analysis of Numerical Model Simulations
(American Meteorological Society, 2017)odels are attractive tools to deepen the understanding of atmospheric and climate processes. In practice, such investigations often involve numerical experiments that switch on or off individual factors (such as latent ... -
Note on Analyzing Perturbation Growth in a Tropical Cyclone–Like Vortex Radiating Inertia–Gravity Waves
(American Meteorological Society, 2017)method is outlined for quantitatively assessing the impact of inertia?gravity wave radiation on the multimechanistic instability modes of a columnar stratified vortex that resembles an intense tropical cyclone. The method ... -
Propagating Annular Modes: Empirical Orthogonal Functions, Principal Oscillation Patterns, and Time Scales
(American Meteorological Society, 2017)he two leading empirical orthogonal functions (EOFs) of zonal-mean zonal wind describe north?south fluctuations, and intensification and narrowing, respectively, of the midlatitude jet. Under certain circumstances, these ... -
The Stability of Mars’s Annular Polar Vortex
(American Meteorological Society, 2017)he Martian polar atmosphere is known to have a persistent local minimum in potential vorticity (PV) near the winter pole, with a region of high PV encircling it. This finding is surprising, since an isolated band of PV is ... -
On the Dependence of Squall Line Characteristics on Surface Conditions
(American Meteorological Society, 2017)he influence of surface conditions in the form of changing surface temperatures on fully developed mesoscale convective systems (MCSs) is investigated using a cloud system resolving setup of the ICON model (1 km grid ... -
Broad-Spectrum Mountain Waves
(American Meteorological Society, 2017)ecent airborne mountain-wave measurements over New Zealand in the lower stratosphere during the Deep Propagating Gravity Wave Experiment (DEEPWAVE) campaign allow for improved spectral analysis of velocities u, ?, and w, ... -
Quantifying the effect of horizontal propagation of three-dimensional mountain waves on the wave momentum flux using Gaussian beam approximation
(American Meteorological Society, 2017)his work examines the influence of horizontal propagation of three-dimensional (3D) mountain waves on the wave momentum flux (WMF) within finite domains (e.g., the grid cell of general circulation models). Under the ... -
Effects of Midlevel Dry Air on Development of the Axisymmetric Tropical Cyclone Secondary Circulation
(American Meteorological Society, 2017)dealized experiments conducted with an axisymmetric tropical cyclone (TC) model are used to assess the effects of midlevel dry air on the axisymmetric TC secondary circulation. Moist entropy diagnostics of convective parcels ... -
Dynamics of Reversed Urban Breeze Circulation
(American Meteorological Society, 2017)he urban breeze circulation (UBC) is a thermally forced mesoscale circulation that is characterized by low-level inward flow toward the urban center, updrafts near the urban center, upper-level outward flows, and weak ...