Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2281-2300 of 13215
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Midlatitude Eddies, Storm-Track Diffusivity, and Poleward Moisture Transport in Warm Climates
(American Meteorological Society, 2012)ecent work using both simplified and comprehensive GCMs has shown that poleward moisture transport across midlatitudes follows Clausius?Clapeyron scaling at temperatures close to modern, but that it reaches a maximum at ... -
A New Method to Estimate Three-Dimensional Residual-Mean Circulation in the Middle Atmosphere and Its Application to Gravity Wave–Resolving General Circulation Model Data
(American Meteorological Society, 2013)new method is proposed to estimate three-dimensional (3D) material circulation driven by waves based on recently derived formulas by Kinoshita and Sato that are applicable to both Rossby waves and gravity waves. The ... -
The North Atlantic Oscillation Response to Large-Scale Atmospheric Anomalies in the Northeastern Pacific
(American Meteorological Society, 2013)ngredients in the North Pacific flow influencing Rossby wave breakings in the North Atlantic and the intraseasonal variations of the North Atlantic Oscillation (NAO) are investigated using both reanalysis data and a ... -
Orographic Drag Associated with Lee Waves Trapped at an Inversion
(American Meteorological Society, 2013)he drag produced by 2D orographic gravity waves trapped at a temperature inversion and waves propagating in the stably stratified layer existing above are explicitly calculated using linear theory, for a two-layer atmosphere ... -
An Air–Sea Coupled Skeleton Model for the Madden–Julian Oscillation
(American Meteorological Society, 2013)his work is an extension and improvement of the minimal Madden?Julian oscillation (MJO) ?skeleton? model developed by Majda and Stechmann, which can capture some important features of the MJO?slow eastward propagation, ... -
Compensation between Resolved and Unresolved Wave Driving in the Stratosphere: Implications for Downward Control
(American Meteorological Society, 2013)erturbations to the orographic gravity wave parameterization scheme in an idealized general circulation model reveal a remarkable degree of compensation between the parameterized and the resolved wave driving: when the ... -
On the Thickness Ratio in the Quasigeostrophic Two-Layer Model of Baroclinic Instability
(American Meteorological Society, 2013)t is shown that the classical quasigeostrophic two-layer model of baroclinic instability possesses an optimal ratio of layer thicknesses that maximizes the growth rate, given the basic-state shear (thermal wind), beta, and ... -
Understanding the Regeneration Stage Undergone by Surface Cyclones Crossing a Midlatitude Jet in a Two-Layer Model
(American Meteorological Society, 2013)he present paper provides a rationale for the regeneration stage undergone by surface cyclones when they cross a baroclinic jet from its anticyclonic-shear (warm) side to its cyclonic-shear (cold) side in a two-layer ... -
Coexistence of Atmospheric Gravity Waves and Boundary Layer Rolls Observed by SAR
(American Meteorological Society, 2013)oth atmospheric gravity waves (AGW) and marine atmospheric boundary layer (MABL) rolls are simultaneously observed on an Environmental Satellite (Envisat) advanced synthetic aperture radar (ASAR) image acquired along the ... -
On the Poleward Motion of Midlatitude Cyclones in a Baroclinic Meandering Jet
(American Meteorological Society, 2013)he motion of surface depressions evolving in a background meandering baroclinic jet is investigated using a two-layer quasigeostrophic model on a beta plane. Synoptic-scale finite-amplitude cyclones are initialized in the ... -
The Genesis of African Easterly Waves by Upstream Development
(American Meteorological Society, 2013)genesis mechanism for African easterly waves (AEWs) is proposed. In the same manner that new troughs and ridges in the midlatitudes form downstream of existing ones through a mechanism known as downstream development, it ... -
Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies?
(American Meteorological Society, 2013)he authors test the hypothesis that recent observed trends in surface westerlies in the Southern Hemisphere are directly consequent on observed trends in the timing of stratospheric final warming events. The analysis begins ... -
Distribution and Mechanisms of Orographic Precipitation Associated with Typhoon Morakot (2009)
(American Meteorological Society, 2013)sing a combination of Doppler radar observations and rain gauge data, this study documents detailed aspects of the orographic precipitation associated with Typhoon Morakot (2009). Rainfall distribution over underlying ... -
Comments on “The Usefulness of Piecewise Potential Vorticity Inversion”
(American Meteorological Society, 2012) -
Effects of Turbulent Mixing on the Structure and Macroscopic Properties of Stratocumulus Clouds Demonstrated by a Lagrangian Trajectory Model
(American Meteorological Society, 2013)he role of turbulent mixing in the formation of the structure of stratocumulus clouds is investigated using a Lagrangian?Eulerian parcel cloud model. The model contains approximately 2000?5000 adjacent parcels with the ... -
Deep Convection Triggering by Boundary Layer Thermals. Part I: LES Analysis and Stochastic Triggering Formulation
(American Meteorological Society, 2013)his paper proposes a new formulation of the deep convection triggering for general circulation model convective parameterizations. This triggering is driven by evolving properties of the strongest boundary layer thermals. ... -
Deep Convection Triggering by Boundary Layer Thermals. Part II: Stochastic Triggering Parameterization for the LMDZ GCM
(American Meteorological Society, 2013)his paper presents a stochastic triggering parameterization for deep convection and its implementation in the latest standard version of the Laboratoire de Météorologie Dynamique?Zoom (LMDZ) general circulation model: ... -
Transient Climate Response in Coupled Atmospheric–Ocean General Circulation Models
(American Meteorological Society, 2013)he equilibrium climate sensitivity (ECS) has a large uncertainty range among models participating in the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) and has recently been presented as ... -
Have Aerosols Caused the Observed Atlantic Multidecadal Variability?
(American Meteorological Society, 2013)dentifying the prime drivers of the twentieth-century multidecadal variability in the Atlantic Ocean is crucial for predicting how the Atlantic will evolve in the coming decades and the resulting broad impacts on weather ... -
Direct Numerical Simulations of a Smoke Cloud–Top Mixing Layer as a Model for Stratocumuli
(American Meteorological Society, 2013)radiatively driven cloud-top mixing layer is investigated using direct numerical simulations. This configuration mimics the mixing process across the inversion that bounds the stratocumulus-topped boundary layer. The main ...