Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1161-1180 of 13215
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A Global Climatology of Tropospheric Inertial Instability
(American Meteorological Society, 2017)AbstractA climatology of tropospheric inertial instability is constructed using the European Centre for Medium-Range Weather Forecasts interim reanalysis (ERA-Interim) at 250, 500, and 850 hPa. For each level, two criteria ... -
Doppler Radar Analysis of the Rapid Intensification of Typhoon Goni (2015) after Eyewall Replacement
(American Meteorological Society, 2017)AbstractA ground-based Doppler radar observed the rapid intensification (RI) of Typhoon Goni (2015) for 24 h immediately after it completed an eyewall replacement cycle. Goni?s RI processes were examined by using radar ... -
A Two-Layer Model for Steady-Amplitude Gravity Waves and Convection Generated by a Thermal Forcing
(American Meteorological Society, 2018)AbstractA two-dimensional two-layer mathematical model is described representing internal gravity waves and convection generated by a thermal forcing in the lower atmosphere. The model consists of an upper layer with stable ... -
Nonuniqueness of Attribution in Piecewise Potential Vorticity Inversion
(American Meteorological Society, 2018)AbstractPiecewise potential vorticity inversion (PPVI) seeks to determine the impact of observed potential vorticity (PV) anomalies on the surrounding flow. This widely used technique is based on dividing a flow domain D ... -
Partitioning Ice Water Content from Retrievals and Its Application in Model Comparison
(American Meteorological Society, 2017)AbstractRetrieved bulk microphysics from remote sensing observations is a composite of ice, snow, and graupel in the three-species ice-phase bulk microphysics parameterization. In this study, density thresholds are used ... -
Enhanced Bottom-of-the-Atmosphere Cooling and Atmosphere Heating Efficiency by Mixed-Type Aerosols: A Classification Based on Aerosol Nonsphericity
(American Meteorological Society, 2017)AbstractThe current understanding of the climate effects of mixed-type aerosols is an open question. The optical and radiative properties of the anthropogenic, mixed-type, and dust aerosols were studied using simultaneous ... -
Mesoscale Gravity Waves in the Mei-Yu Front System
(American Meteorological Society, 2017)AbstractHigh-resolution cloud-permitting simulations with the Weather Research and Forecasting (WRF) Model are performed to study the generation, structure, and characteristics of mesoscale gravity waves in an idealized ... -
Formation of Two-Dimensional Circulation in Response to Unsteady Wave Forcing in the Middle Atmosphere
(American Meteorological Society, 2017)AbstractIn previous studies, a steady-state assumption has been frequently used for the analysis of wave-induced meridional circulation. In general, however, the wave forcing is not constant and thus induced circulation ... -
Wind–Flux Feedbacks and Convective Organization during the November 2011 MJO Event in a High-Resolution Model
(American Meteorological Society, 2017)AbstractThe November 2011 Madden?Julian oscillation (MJO) event during the Dynamics of the MJO (DYNAMO) field campaign is simulated with the Regional Atmospheric Modeling System (RAMS) cloud-resolving model to examine the ... -
A Numerical Investigation of the Potential Effects of Aerosol-Induced Warming and Updraft Width and Slope on Updraft Intensity in Deep Convective Clouds
(American Meteorological Society, 2017)AbstractThe effects of aerosol perturbations on deep convective clouds have received considerable attention in the recent literature, especially from a modeling perspective. The published responses in precipitation amount ... -
Quantifying the Effects of Horizontal Grid Length and Parameterized Convection on the Degree of Convective Organization Using a Metric of the Potential for Convective Interaction
(American Meteorological Society, 2017)AbstractThe organization of deep convection and its misrepresentation in many global models is the focus of much current interest. A new method is presented for quantifying convective organization based on the identification ... -
A Scale-Adaptive Turbulent Kinetic Energy Closure for the Dry Convective Boundary Layer
(American Meteorological Society, 2017)AbstractA pragmatic scale-adaptive turbulent kinetic energy (TKE) closure is proposed to simulate the dry convective boundary layer for a variety of horizontal grid resolutions: from 50 m, typical of large-eddy simulation ... -
Turbulent Friction Velocity Calculated from the Reynolds Stress Tensor
(American Meteorological Society, 2018)AbstractTo eliminate the need to correct for instrument tilt, a process that can be problematic in complex terrain, a new way to calculate the turbulent friction velocity is derived based on invariants of the Reynolds ... -
Dispersion Characteristics and Circulation Associated with Boreal Summer Westward-Traveling Mixed Rossby–Gravity Wave–Like Disturbances
(American Meteorological Society, 2017)AbstractAn algorithm has been developed to track synoptic-scale, westward-traveling mixed Rossby?gravity (MRG) wave?like disturbances with a cross-equatorial component. Applied to space?time-filtered meridional wind data, ... -
Upscale Impact of Mesoscale Disturbances of Tropical Convection on Convectively Coupled Kelvin Waves
(American Meteorological Society, 2017)AbstractTropical convection associated with convectively coupled Kelvin waves (CCKWs) is typically organized by an eastward-moving synoptic-scale convective envelope with numerous embedded westward-moving mesoscale ... -
The Emergence of Shallow Easterly Jets within QBO Westerlies
(American Meteorological Society, 2017)AbstractA configuration of an idealized general circulation model has been obtained in which a deep, stratospheric, equatorial, westerly jet is established that is spontaneously and quasi-periodically disrupted by shallow ... -
The Response of an Idealized Atmosphere to Localized Tropical Heating: Superrotation and the Breakdown of Linear Theory
(American Meteorological Society, 2017)AbstractAn equatorial heat source mimicking the strong diabatic heating above the west Pacific is added to an idealized, dry general circulation model. For small (<0.5 K day?1) heating rates the responses closely match the ... -
Enhanced Bottom-of-the-Atmosphere Cooling and Atmosphere Heating Efficiency by Mixed-Type Aerosols: A Classification Based on Aerosol Nonsphericity
(American Meteorological Society, 2017)AbstractThe current understanding of the climate effects of mixed-type aerosols is an open question. The optical and radiative properties of the anthropogenic, mixed-type, and dust aerosols were studied using simultaneous ... -
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(American Meteorological Society, 2017)AbstractThe November 2011 Madden?Julian oscillation (MJO) event during the Dynamics of the MJO (DYNAMO) field campaign is simulated with the Regional Atmospheric Modeling System (RAMS) cloud-resolving model to examine the ... -
Beyond the Rigid Lid: Baroclinic Modes in a Structured Atmosphere
(American Meteorological Society, 2017)AbstractThe baroclinic-mode decomposition is a fixture of the tropical-dynamics literature because of its simplicity and apparent usefulness in understanding a wide range of atmospheric phenomena. However, its derivation ...