Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2741-2760 of 13215
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Corrigendum
(American Meteorological Society, 2007)In a recent paper, explicit expressions have been derived for obtaining and subsequently partitioning streamfunction growth rates for a class of quasigeostrophic models. Unfortunately, however, some typographical errors ... -
CORRIGENDUM
(American Meteorological Society, 2007) -
Extratropical–Tropical Interaction during Onset of the Australian Monsoon: Reanalysis Diagnostics and Idealized Dry Simulations
(American Meteorological Society, 2007)The onset of the Australian monsoon is examined using (i) reanalysis data for seasons when enhanced observational networks were available and (ii) a 15-yr onset composite. Similar to previous findings, onset is characterized ... -
On the Lagrangian Dynamics of Atmospheric Zonal Jets and the Permeability of the Stratospheric Polar Vortex
(American Meteorological Society, 2007)The Lagrangian dynamics of zonal jets in the atmosphere are considered, with particular attention paid to explaining why, under commonly encountered conditions, zonal jets serve as barriers to meridional transport. The ... -
Limitations of the Wegener–Bergeron–Findeisen Mechanism in the Evolution of Mixed-Phase Clouds
(American Meteorological Society, 2007)Phase transformation and precipitation formation in mixed-phase clouds are usually associated with the Wegener?Bergeron?Findeisen (WBF) process in which ice crystals grow at the expense of liquid droplets. The evolution ... -
Characteristics and Momentum Flux Spectrum of Convectively Forced Internal Gravity Waves in Ensemble Numerical Simulations
(American Meteorological Society, 2007)Characteristics of convectively forced gravity waves are investigated through ensemble numerical simulations for various ideal and real convective storms. For ideal storm cases, single-cell-, multicell-, and supercell-type ... -
The Response of a Uniform Horizontal Temperature Gradient to Heating
(American Meteorological Society, 2007)The response of a uniform horizontal temperature gradient to prescribed fixed heating is calculated in the context of an extended version of surface quasigeostrophic dynamics. It is found that for zero mean surface flow ... -
Extreme Value Statistics of the Total Energy in an Intermediate-Complexity Model of the Midlatitude Atmospheric Jet. Part II: Trend Detection and Assessment
(American Meteorological Society, 2007)A baroclinic model for the atmospheric jet at middle latitudes is used as a stochastic generator of nonstationary time series of the total energy of the system. A linear time trend is imposed on the parameter TE, descriptive ... -
Forced Annular Mode Patterns in a Simple Atmospheric General Circulation Model
(American Meteorological Society, 2007)Previous studies using simplified general circulation models have shown that ?annular modes? arise as the dominant mode of variability. A simple GCM is used here to explore to what extent these modes are also the preferred ... -
The Effect of Cumulus Cloud Field Anisotropy on Domain-Averaged Solar Fluxes and Atmospheric Heating Rates
(American Meteorological Society, 2007)Cumulus clouds can become tilted or elongated in the presence of wind shear. Nevertheless, most studies of the interaction of cumulus clouds and radiation have assumed these clouds to be isotropic. This paper describes an ... -
Modulation of Westerly Wind Bursts by Sea Surface Temperature: A Semistochastic Feedback for ENSO
(American Meteorological Society, 2007)Westerly wind bursts (WWBs) in the equatorial Pacific are known to play a significant role in the development of El Niño events. They have typically been treated as a purely stochastic external forcing of ENSO. Recent ... -
Transport and Mixing in Kinematic and Dynamically Consistent Flows
(American Meteorological Society, 2007)The interplay between dynamics and transport in two-dimensional flows is examined by comparing the transport and mixing in a kinematic flow in which the velocity field is imposed as a given function of time with that in ... -
Mesoscale Predictability of Moist Baroclinic Waves: Convection-Permitting Experiments and Multistage Error Growth Dynamics
(American Meteorological Society, 2007)A recent study examined the predictability of an idealized baroclinic wave amplifying in a conditionally unstable atmosphere through numerical simulations with parameterized moist convection. It was demonstrated that with ... -
Modeling the Effects of Land–Sea Roughness Contrast on Tropical Cyclone Winds
(American Meteorological Society, 2007)The fifth-generation Pennsylvania State University?National Center for Atmospheric Research (PSU?NCAR) Mesoscale Model (MM5) is used to simulate tropical cyclone (TC) wind distribution near landfall. On an f plane at 15°N, ... -
Weather Noise Forcing of Surface Climate Variability
(American Meteorological Society, 2007)A model-based method to evaluate the role of weather noise forcing of low-frequency variability of surface properties, including SST, surface currents, land surface temperature, and soil moisture, is presented. In this ... -
Dynamics of Orographically Triggered Banded Convection in Sheared Moist Orographic Flows
(American Meteorological Society, 2007)Shallow orographic convection embedded in an unstable cap cloud can organize into convective bands. Previous research has highlighted the important role of small-amplitude topographic variations in triggering and organizing ... -
Prediction and Diagnosis of Tropical Cyclone Formation in an NWP System. Part III: Diagnosis of Developing and Nondeveloping Storms
(American Meteorological Society, 2007)This is the third of a three-part investigation into tropical cyclone (TC) genesis in the Australian Bureau of Meteorology?s Tropical Cyclone Limited Area Prediction System (TC-LAPS), an operational numerical weather ... -
Reduced Atmospheric Models Using Dynamically Motivated Basis Functions
(American Meteorological Society, 2007)Nonlinear deterministic reduced models of large-scale atmospheric dynamics are constructed. The dynamical framework is a quasigeostrophic three-level spectral model with realistic mean state and variability as well as ... -
Evidence of Tropical Forcing of the 6.5-Day Wave from Lightning Observations over Africa
(American Meteorological Society, 2007)A study employing observations and climatic reanalysis data is concerned with links between convection and the well-documented 6.5-day stratospheric global wave. Observations from a long-range lightning detection network, ... -
The Reflection of a Stationary Gravity Wave by a Viscous Boundary Layer
(American Meteorological Society, 2007)The backward reflection of a stationary gravity wave (GW) propagating toward the ground is examined in the linear viscous case and for large Reynolds numbers (Re). In this case, the stationary GW presents a critical level ...