Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3841-3860 of 13215
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Linear Spectral Numerical Model for Internal Gravity Wave Propagation
(American Meteorological Society, 2009)A three-dimensional linear spectral numerical model is proposed to simulate the propagation of internal gravity wave fluctuations in a stably stratified atmosphere. The model is developed to get first-order estimations of ... -
Cloud-Resolving Simulation of Low-Cloud Feedback to an Increase in Sea Surface Temperature
(American Meteorological Society, 2010)This study investigates the physical mechanisms of the low cloud feedback through cloud-resolving simulations of cloud-radiative equilibrium response to an increase in sea surface temperature (SST). Six pairs of perturbed ... -
A Parameterization of the Microphysical Processes Forming Many Types of Winter Precipitation
(American Meteorological Society, 2010)Several types of precipitation, such as freezing rain, ice pellets, and wet snow, are commonly observed during winter storms. The objective of this study is to better understand the formation of these winter precipitation ... -
The Roles of Equatorial Trapped Waves and Internal Inertia–Gravity Waves in Driving the Quasi-Biennial Oscillation. Part I: Zonal Mean Wave Forcing
(American Meteorological Society, 2009)The roles of equatorial trapped waves (EQWs) and internal inertia?gravity waves in driving the quasi-biennial oscillation (QBO) are investigated using a high-resolution atmospheric general circulation model with T213L256 ... -
Transport and Mixing in the Extratropical Tropopause Region in a High-Vertical-Resolution GCM. Part I: Potential Vorticity and Heat Budget Analysis
(American Meteorological Society, 2009)A high-vertical-resolution general circulation model (GCM) output has been analyzed to clarify transport and mixing processes in the extratropical tropopause region. The high-resolution GCM, with a vertical resolution of ... -
The Roles of Equatorial Trapped Waves and Internal Inertia–Gravity Waves in Driving the Quasi-Biennial Oscillation. Part II: Three-Dimensional Distribution of Wave Forcing
(American Meteorological Society, 2009)Three-dimensional wave forcing of simulated quasi-biennial oscillation (QBO) is investigated using a high-resolution atmospheric general circulation model with T213L256 resolution (60-km horizontal and 300-m vertical ... -
Regimes of Dry Convection above Wildfires: Sensitivity to Fire Line Details
(American Meteorological Society, 2010)Fire lines are complex phenomena with a broad range of scales of cross-line dimension, undulations, and along-line variation in heating rates. While some earlier studies have examined parcel processes in two-dimensional ... -
Nonnormal Frontal Dynamics
(American Meteorological Society, 2009)The generalized stability of the secondary atmospheric circulation over strong SST fronts is studied using a hydrostatic, Boussinesq, two-dimensional f-plane model. It is shown that even in a parameter regime in which these ... -
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(American Meteorological Society, 2009) -
Noise-Induced Instability in the ENSO Recharge Oscillator
(American Meteorological Society, 2010)The conceptual El Niño?Southern Oscillation (ENSO) recharge oscillator model is used to study the linear stability of ENSO under state-dependent noise forcing. The analytical framework developed by Jin et al. is extended ... -
Fluctuation of Mass Flux in a Cloud-Resolving Simulation with Interactive Radiation
(American Meteorological Society, 2010)It was shown by Craig and Cohen that fluctuations of cumulus clouds under homogeneous large-scale forcing satisfy the Gibbs canonical ensemble in a strict radiative?convective equilibrium (RCE). In the limit of random ... -
To What Extent Does High-Latitude Wave Forcing Drive Tropical Upwelling in the Brewer–Dobson Circulation?
(American Meteorological Society, 2009)The causes of the annual cycle and nonseasonal variability in the globally averaged, equator-to-pole Brewer?Dobson circulation (BDC; defined here as the equatorially symmetric component of the Lagrangian-mean meridional ... -
Steady-State Dynamics of a Density Current in an f-Plane Nonlinear Shallow-Water Model
(American Meteorological Society, 2010)The authors study the nonlinear dynamics of a density current generated by a diabatic source in a rotating and a nonrotating system, both in the presence and in the absence of frictional losses, using a steady-state ... -
Global Circuit Model with Clouds
(American Meteorological Society, 2009)Cloud data from the International Satellite Cloud Climatology Project (ISCCP) database have been introduced into the global circuit model developed by Tinsley and Zhou. Using the cloud-top pressure data and cloud type ... -
Aerosol Effects on Intensity of Landfalling Hurricanes as Seen from Simulations with the WRF Model with Spectral Bin Microphysics
(American Meteorological Society, 2010)The evolution of a superhurricane (Katrina, August 2005) was simulated using the Weather Research and Forecasting Model (WRF; version 3.1) with explicit (nonparameterized) spectral bin microphysics (SBM). The new computationally ... -
Finite-Amplitude Equilibration of Baroclinic Waves on a Jet
(American Meteorological Society, 2010)A two-layer quasigeostrophic model is used to study the equilibration of baroclinic waves. In this model, if the background flow is relaxed toward a jetlike profile, a finite-amplitude baroclinic wave solution can be ... -
A Higher-Order Closure Model with an Explicit PBL Top
(American Meteorological Society, 2010)In 2001, the authors presented a higher-order mass-flux model called ?assumed distributions with higher-order closure? (ADHOC 1), which represents the large eddies of the planetary boundary layer (PBL) in terms of an assumed ... -
Impacts of Evaporation from Raindrops on Tropical Cyclones. Part II: Features of Rainbands and Asymmetric Structure
(American Meteorological Society, 2010)In this study, the impacts of evaporative cooling from raindrops on a tropical cyclone (TC) are examined using cloud-resolving simulations under an idealized condition. Part I of this study showed that evaporative cooling ... -
Model Study of Waves Generated by Convection with Direct Validation via Satellite
(American Meteorological Society, 2009)Atmospheric gravity waves have a major effect on atmospheric circulation, structure, and stability on a global scale. Gravity waves can be generated by convection, but in many cases it is difficult to link convection ... -
Statistics of Small-Scale Velocity Fluctuations and Internal Intermittency in Marine Stratocumulus Clouds
(American Meteorological Society, 2010)Clouds are known to be turbulent, but the details of their internal turbulent structure have been largely unexplored. Measurements of turbulent velocities in stratocumulus clouds presented here reveal an intermittent ...