Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2421-2440 of 13215
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On the Predictability of Supercell Thunderstorm Evolution
(American Meteorological Society, 2013)upercell thunderstorms produce a disproportionate amount of the severe weather in the United States, and accurate prediction of their movement and evolution is needed to warn the public of their hazards. This study explores ... -
A Simple GCM Study on the Relationship between ENSO and the Southern Annular Mode
(American Meteorological Society, 2013)his study investigates the relationship between El Niño?Southern Oscillation (ENSO) and southern annular mode (SAM) events with an idealized general circulation model. A series of model calculations are performed to examine ... -
New Hailstone Physics. Part I: Heat and Mass Transfer (HMT) and Growth
(American Meteorological Society, 2013)n all-encompassing new theory of heat and mass transfer (HMT) and growth equations have been developed for freely falling spherical hailstones with diameters of 0.5?8 cm. The initial six variables are diameter, liquid water ... -
Turbulence and Vertical Fluxes in the Stable Atmospheric Boundary Layer. Part I: A Large-Eddy Simulation Study
(American Meteorological Society, 2013)his study seeks to quantitatively and qualitatively understand how stability affects transport in the continuously turbulent stably stratified atmospheric boundary layer, based on a suite of large-eddy simulations. The ... -
New Hailstone Physics. Part II: Interaction of the Variables
(American Meteorological Society, 2013)he reduction of parameter dimensions in Part I is complemented by the compaction of parameter space in Part II. The range of diameters is 0.5 ≤ D ≤ 8 cm, and the assumed liquid water content varies within 1 ≤ Wf ≤ 3 for ... -
The Impact of Gradient Wind Imbalance on Potential Intensity of Tropical Cyclones in an Unbalanced Slab Boundary Layer Model
(American Meteorological Society, 2013)he assumption of gradient wind balance is customarily made so as to derive the theoretical upper-bound intensity of a mature tropical cyclone. Emanuel's theory of hurricane potential intensity (E-PI) makes use of this ... -
Vertical Velocity and Microphysical Distributions Related to Rapid Intensification in a Simulation of Hurricane Dennis (2005)
(American Meteorological Society, 2012)1-km Weather Research and Forecasting model simulation of Hurricane Dennis was used to identify precursors in vertical velocity and latent heating distributions to rapid intensification (RI). Although the observed structure ... -
On the Northern Annular Mode Surface Signal Associated with Stratospheric Variability
(American Meteorological Society, 2013)he wintertime northern annular mode (NAM) at the surface is known to undergo slow intraseasonal variations in association with stratospheric variability, which leads the surface signal by up to several weeks. The relative ... -
Directional Wind–Wave Coupling in Fully Coupled Atmosphere–Wave–Ocean Models: Results from CBLAST-Hurricane
(American Meteorological Society, 2013)he extreme high winds, intense rainfall, large ocean waves, and copious sea spray in hurricanes push the surface-exchange parameters for temperature, water vapor, and momentum into untested regimes. The Coupled Boundary ... -
Reply to “Comments on ‘Convectively Generated Potential Vorticity in Rainbands and Formation of the Secondary Eyewall in Hurricane Rita of 2005’”
(American Meteorological Society, 2012) -
Relative Roles of Circumnavigating Waves and Extratropics on the MJO and Its Relationship with the Mean State
(American Meteorological Society, 2012)set of atmospheric general circulation model (GCM) experiments is designed to explore the relative roles of the circumnavigating waves and the extratropics on the Madden?Julian oscillation (MJO). In a ?control? simulation, ... -
Derivation of Turbulent Kinetic Energy from a First-Order Nonlocal Planetary Boundary Layer Parameterization
(American Meteorological Society, 2012)urbulent kinetic energy (TKE) is derived from a first-order planetary boundary layer (PBL) parameterization for convective boundary layers: the nonlocal K-profile Yonsei University (YSU) PBL. A parameterization for the TKE ... -
A Method for Adaptive Habit Prediction in Bulk Microphysical Models. Part II: Parcel Model Corroboration
(American Meteorological Society, 2012)t is common for cloud microphysical models to use a single axis length to characterize ice crystals. These methods use either the diameter of an equivalent sphere or mass?size equations in conjunction with the capacitance ... -
Performance of a Triclass Parameterization for the Collision–Coalescence Process in Shallow Clouds
(American Meteorological Society, 2012)ocusing on the formation of precipitation in marine stratiform clouds, a two-moment bulk parameterization for three liquid water classes (cloud, drizzle, and rain) is proposed to describe the process of collision?coalescence. ... -
Double-Nested Dynamical Downscaling Experiments over the Tibetan Plateau and Their Projection of Climate Change under Two RCP Scenarios
(American Meteorological Society, 2012)high-resolution regional climate model is used to simulate climate change over the Tibetan Plateau (TP). The model is driven at the grid spacing of 10 km by nesting the outputs of 50-km-resolution simulations. The results ... -
Lifting of Ambient Air by Density Currents in Sheared Environments
(American Meteorological Society, 2012)wo aspects of vorticity associated with cold pools are addressed. First, tilting of horizontal vortex tubes by the updraft at a gust front has been proposed as a means of getting near-ground rotation and hence a tornado. ... -
A Study of the North Atlantic Oscillation Using Conditional Nonlinear Optimal Perturbation
(American Meteorological Society, 2012)he conditional nonlinear optimal perturbation (CNOP) method is used to explore the optimal precursors that trigger the North Atlantic Oscillation (NAO) anomaly pattern with a triangular T21, three-level, quasi-geostrophic ... -
A Probabilistic Bulk Model of Coupled Mixed Layer and Convection. Part I: Clear-Sky Case
(American Meteorological Society, 2013)new bulk model of the convective boundary layer, the probabilistic bulk convection model (PBCM), is presented. Unlike prior bulk approaches that have modeled the mixed-layer-top buoyancy flux as a constant fraction of the ... -
A Probabilistic Bulk Model of Coupled Mixed Layer and Convection. Part II: Shallow Convection Case
(American Meteorological Society, 2013)he probabilistic bulk convection model (PBCM) developed in a companion paper is here extended to shallow nonprecipitating convection. The PBCM unifies the clear-sky and shallow convection boundary layer regimes by obtaining ... -
Measurement of Convective Entrainment Using Lagrangian Particles
(American Meteorological Society, 2012)agrangian particle tracking is used in a large-eddy simulation to study an individual cumulus congestus. This allows for the direct measurement of the convective entrainment rate and of the residence times of entrained ...