Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1361-1380 of 13215
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Diurnal Variations of the Land–Sea Breeze and Its Related Precipitation over South China
(American Meteorological Society, 2016)onvection-permitting numerical experiments using the Weather Research and Forecasting (WRF) Model are performed to examine the diurnal cycles of land and sea breeze and its related precipitation over the south China coastal ... -
The Dynamics of Mesoscale Winds in the Upper Troposphere and Lower Stratosphere
(American Meteorological Society, 2016)pectral analysis is applied to infer the dynamics of mesoscale winds from aircraft observations in the upper troposphere and lower stratosphere. Two datasets are analyzed: one collected aboard commercial aircraft and one ... -
Moist Formulations of the Eliassen–Palm Flux and Their Connection to the Surface Westerlies
(American Meteorological Society, 2016)he Eliassen?Palm (EP) flux is an important diagnostic for wave propagation and wave?mean flow interaction in the atmosphere. Here, two moist formulations of the EP flux are compared with the traditional dry EP flux, and ... -
Visibility: How Applicable is the Century-Old Koschmieder Model?
(American Meteorological Society, 2016)oschmieder proposed that visibility is inversely proportional to the extinction coefficient of air, and this model has been widely adopted during the past century. Using radiative transfer theory, the authors present a ... -
On the Relation between Gravity Waves and Wind Speed in the Lower Stratosphere over the Southern Ocean
(American Meteorological Society, 2017)he relationship between gravity wave momentum fluxes and local wind speed is investigated for oceanic regions at high southern latitudes during austral spring. The motivation is to better describe the gravity wave field ... -
Contributions of Moist Convection and Internal Gravity Waves to Building the Atmospheric −5/3 Kinetic Energy Spectra
(American Meteorological Society, 2016)ith high-resolution mesoscale model simulations, the authors have confirmed a recent study demonstrating that convective systems, triggered in a horizontally homogeneous environment, are able to generate a background ... -
Closure Schemes for Stably Stratified Atmospheric Flows without Turbulence Cutoff
(American Meteorological Society, 2016)wo recently proposed turbulence closure schemes are compared against the conventional Mellor?Yamada (MY) model for stably stratified atmospheric flows. The Energy- and Flux-Budget (EFB) approach solves the budgets of ... -
On the Predictability and Error Sources of Tropical Cyclone Intensity Forecasts
(American Meteorological Society, 2016)he skill of tropical cyclone intensity forecasts has improved slowly since such forecasts became routine, even though track forecast skill has increased markedly over the same period. In deciding whether or how best to ... -
The Linear Response Function of an Idealized Atmosphere. Part II: Implications for the Practical Use of the Fluctuation–Dissipation Theorem and the Role of Operator’s Nonnormality
(American Meteorological Society, 2016)linear response function (LRF) relates the mean response of a nonlinear system to weak external forcings and vice versa. Even for simple models of the general circulation, such as the dry dynamical core, the LRF cannot be ... -
The Importance of Critical Layer in Differentiating Developing from Nondeveloping Easterly Waves
(American Meteorological Society, 2016)ecently Asaadi et al. found that an easterly wave (EW) train over the Atlantic and eastern Pacific is oriented in a southeast?northwest direction because of the observed tilt in the easterly jet. This tilt results in only ... -
A Dynamic Link between Ice Nucleating Particles Released in Nascent Sea Spray Aerosol and Oceanic Biological Activity during Two Mesocosm Experiments
(American Meteorological Society, 2016)mission rates and properties of ice nucleating particles (INPs) are required for proper representation of aerosol?cloud interactions in atmospheric models. Few investigations have quantified marine INP emissions, a potentially ... -
Covariation of Finite-Amplitude Wave Activity and the Zonal-Mean Flow in the Midlatitude Troposphere. Part II: Eddy Forcing Spectra and the Periodic Behavior in the Southern Hemisphere Summer
(American Meteorological Society, 2016)reviously, in Part I of this study, the authors used latitude-by-latitude budgets of the vertically integrated finite-amplitude wave activity (FAWA) to describe the covariation of the zonal-mean state and eddy amplitude. ... -
Effects of Urban Plume Aerosols on a Mesoscale Convective System
(American Meteorological Society, 2016)his study examines the effects of urban aerosols on a mesoscale convective system (MCS) in the central Great Plains with the Weather Research and Forecasting Model coupled with chemistry (WRF-Chem). Urban emissions from ... -
Intraseasonal Periodicity in the Southern Hemisphere Circulation on Regional Spatial Scales
(American Meteorological Society, 2016)ave activity in the Southern Hemisphere extratropical atmosphere exhibits robust periodicity on time scales of ~20?25 days. Previous studies have demonstrated the robustness of the periodicity in hemispheric averages of ... -
Mountain Waves, Downslope Winds, and Low-Level Blocking Forced by a Midlatitude Cyclone Encountering an Isolated Ridge
(American Meteorological Society, 2016)he interaction of a midlatitude cyclone with an isolated north?south mountain barrier is examined using numerical simulation. A prototypical cyclone develops from an isolated disturbance in a baroclinically unstable shear ... -
Dynamical and Physical Processes Associated with Orographic Precipitation in a Conditionally Unstable Uniform Flow: Variation in Basic Wind Speed
(American Meteorological Society, 2016)series of systematic two- and three-dimensional (2D and 3D, respectively) idealized numerical experiments were conducted to investigate the combined effects of dynamical and physical processes on orographic precipitation ... -
A Short-Term Negative Eddy Feedback on Midlatitude Jet Variability due to Planetary Wave Reflection
(American Meteorological Society, 2016)three-level quasigeostrophic model on the sphere is used to identify the physical nature of the negative planetary wave feedback on midlatitude jet variability. A first approach consists of studying the nonlinear evolution ... -
The Role of Eddy Diffusivity on a Poleward Jet Shift
(American Meteorological Society, 2016)he authors use a quasigeostrophic (QG) two-layer model to examine how eddies modify the meridional asymmetry of a zonal jet. The initial asymmetry is introduced in the model?s ?radiative equilibrium state? and is intended ... -
Giga-LES of Hector the Convector and Its Two Tallest Updrafts up to the Stratosphere
(American Meteorological Society, 2016)he dynamics of Hector the Convector, which overshot into the stratosphere on 30 November 2005 over the Tiwi Islands, Australia, is investigated using a giga-large-eddy simulation with a 100-m cubic mesh. Individual updrafts, ... -
On the Processes Leading to the Rapid Intensification of Typhoon Megi (2010)
(American Meteorological Society, 2017)he processes leading to the rapid intensification (RI) of Typhoon Megi (2010) are explored with a convection-permitting full-physics model and a sensitivity experiment using a different microphysical scheme. It is found ...