Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1861-1880 of 13215
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The MJO Cycle Forcing of the North Atlantic Circulation: Intervention Experiments with the Community Earth System Model
(American Meteorological Society, 2014)three-dimensional evolution of Madden?Julian oscillation (MJO) diabatic heating for October?March from satellite data is constructed: the heating propagates eastward for three cycles, modulated by the likelihood for a given ... -
Comments on “The Unusual Southern Hemisphere Winter of 2002”
(American Meteorological Society, 2014) -
Properties of a Mesoscale Convective System in the Context of an Isentropic Analysis
(American Meteorological Society, 2015)pplication of an isentropic analysis of convective motions to a simulated mesoscale convective system is presented. The approach discriminates the vertical mass transport in terms of equivalent potential temperature. The ... -
Shear Capacity as Prognostic for Nocturnal Boundary Layer Regimes
(American Meteorological Society, 2014)ield observations and theoretical analysis are used to investigate the appearance of different nocturnal boundary layer regimes. Recent theoretical findings predict the appearance of two different regimes: the continuously ... -
Measurements of Saharan Dust in Convective Clouds over the Tropical Eastern Atlantic Ocean
(American Meteorological Society, 2014)ineral dust particles have been shown to act as cloud condensation nuclei, and they are known to interact with developing tropical storms over the Atlantic downwind of the Sahara. Once present within liquid droplets, they ... -
Disdrometer Network Observations of Finescale Spatial–Temporal Clustering in Rain
(American Meteorological Society, 2014)he spatial clustering of drops is a defining characteristic of rain on all scales from centimeters to kilometers. It is the physical basis for much of the observed variability in rain. The authors report here on the ... -
Mechanisms Governing the Persistence and Diurnal Cycle of a Heavy Rainfall Corridor
(American Meteorological Society, 2014)bservations and convection-permitting simulations are used to study a 12-day warm-season heavy precipitation corridor over the central U.S. plains and Mississippi River valley regions. Such precipitation corridors, defined ... -
Vortex Encounter Rates with Fixed Barometer Stations: Comparison with Visual Dust Devil Counts and Large-Eddy Simulations
(American Meteorological Society, 2014)phenomenological model is developed wherein vortices are introduced at random into a virtual arena with specified distributions of diameter, core pressure drop, longevity, and translation speed, and the pressure history ... -
Morphology, Intensity, and Rainfall Production of MJO Convection: Observations from DYNAMO Shipborne Radar and TRMM
(American Meteorological Society, 2014)his study uses Dynamics of the Madden?Julian Oscillation (DYNAMO) shipborne [Research Vessel (R/V) Roger Revelle] radar and Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) datasets to investigate ... -
Absolute and Convective Instability of the African Easterly Jet
(American Meteorological Society, 2015)he stability of the African easterly jet (AEJ) is examined using idealized numerical simulations. It is found that a zonally homogeneous representation of the AEJ can support absolute instability in the form of African ... -
Wind and Temperature Oscillations Generated by Wave–Turbulence Interactions in the Stably Stratified Boundary Layer
(American Meteorological Society, 2014)he authors investigate atmospheric internal gravity waves (IGWs): their generation and induction of global intermittent turbulence in the nocturnal stable atmospheric boundary layer based on the new concept of turbulence ... -
Evaluating the Diurnal Cycle of Upper-Tropospheric Ice Clouds in Climate Models Using SMILES Observations
(American Meteorological Society, 2014)pper-tropospheric ice cloud measurements from the Superconducting Submillimeter Limb Emission Sounder (SMILES) on the International Space Station (ISS) are used to study the diurnal cycle of upper-tropospheric ice cloud ... -
Symmetric Instability in the Outflow Layer of a Major Hurricane
(American Meteorological Society, 2014)set of 327 dropsondes from the NOAA G-IV aircraft was used to create a composite analysis of the azimuthally averaged absolute angular momentum in the outflow layer of major Hurricane Ivan (2004). Inertial instability ... -
On the Co-Occurrence of Warm Conveyor Belt Outflows and PV Streamers
(American Meteorological Society, 2014)he co-occurrence of warm conveyor belts (WCBs), strongly ascending moist airstreams in extratropical cyclones, and stratospheric potential vorticity (PV) streamers, indicators for breaking Rossby waves on the tropopause, ... -
A Return Stroke NOx Production Model
(American Meteorological Society, 2014)model is introduced for estimating the nitrogen oxides (NOx = NO + NO2) production from a lightning return stroke channel. A realistic modified transmission line model return stroke current is assumed to propagate vertically ... -
The MJO in a Coarse-Resolution GCM with a Stochastic Multicloud Parameterization
(American Meteorological Society, 2014)he representation of the Madden?Julian oscillation (MJO) is still a challenge for numerical weather prediction and general circulation models (GCMs) because of the inadequate treatment of convection and the associated ... -
A Clustering Method to Characterize Intermittent Bursts of Turbulence and Interaction with Submesomotions in the Stable Boundary Layer
(American Meteorological Society, 2014)tmospheric boundary layers with stable stratification include a variety of small-scale nonturbulent motions such as waves, microfronts, and other complex structures. When the thermal stratification becomes strong, the ... -
Atmospheric Kinetic Energy Spectra from Global High-Resolution Nonhydrostatic Simulations
(American Meteorological Society, 2014)inetic energy (KE) spectra derived from global high-resolution atmospheric simulations from the Model for Prediction Across Scales (MPAS) are presented. The simulations are produced using quasi-uniform global Voronoi ... -
Stratospheric Wave–Mean Flow Feedbacks and Sudden Stratospheric Warmings in a Simple Model Forced by Upward Wave Activity Flux
(American Meteorological Society, 2014)classic result of studying stratospheric wave?mean flow interactions presented by Holton and Mass is that, for constant incoming wave forcing (at a notional tropopause), a vacillating stratospheric response may ensue. ... -
A New Generic Method for Quantifying the Scale Predictability of the Fractal Atmosphere: Applications to Model Verification
(American Meteorological Society, 2015)he authors revisit the issue regarding the predictability of a flow that possesses many scales of motion raised by Lorenz in 1969 and apply the general systems theory developed by Selvam in 1990 to error diagnostics and ...