Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1541-1560 of 13215
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Modeling the Interaction between Quasigeostrophic Vertical Motion and Convection in a Single Column
(American Meteorological Society, 2015)single-column modeling approach is proposed to study the interaction between convection and large-scale dynamics using the quasigeostrophic (QG) framework. This approach extends the notion of ?parameterization of large-scale ... -
Parameterization of Cloud Microphysics Based on the Prediction of Bulk Ice Particle Properties. Part III: Introduction of Multiple Free Categories
(American Meteorological Society, 2015)he predicted particle properties (P3) scheme introduced in Part I of this series represents all ice hydrometeors using a single ?free? category, in which the bulk properties evolve smoothly through changes in the prognostic ... -
Predictability of Dry Convective Boundary Layers: An LES Study
(American Meteorological Society, 2016)he predictability horizon of convective boundary layers is investigated in this study. Large-eddy simulation (LES) and direct numerical simulation (DNS) techniques are employed to probe the evolution of perturbations in ... -
Investigation of the Effects of Anthropogenic Pollution on Typhoon Precipitation and Microphysical Processes Using WRF-Chem
(American Meteorological Society, 2016)aking Typhoon Usagi (2013) as an example, this study used the Weather Research and Forecasting Model with Chemistry to investigate the influence of anthropogenic aerosols on typhoons. Three simulations (CTL, CLEAN, EXTREME) ... -
Predictability of Major Stratospheric Sudden Warmings: Analysis Results from JMA Operational 1-Month Ensemble Predictions from 2001/02 to 2012/13
(American Meteorological Society, 2015)his study investigates the predictability of major stratospheric sudden warmings (MSSWs) with a chief question: how far in advance can MSSWs be forecasted? An average picture and case-to-case variations of the MSSW ... -
Cloud Droplet Collisions in Turbulent Environment: Collision Statistics and Parameterization
(American Meteorological Society, 2015)he purpose of this paper is to quantify the influence of turbulence in collision statistics by separately studying the impacts of computational domain sizes, eddy dissipation rates (EDRs), and droplet sizes and eventually ... -
Dynamics Governing a Simulated Mesoscale Convective System with a Training Convective Line
(American Meteorological Society, 2016)his research investigates the dynamics of a simulated training line/adjoining stratiform (TL/AS) mesoscale convective system (MCS), with composite atmospheric fields used as initial and lateral boundary conditions for the ... -
Meridional Rossby Wave Generation and Propagation in the Maintenance of the Wintertime Tropospheric Double Jet
(American Meteorological Society, 2016)he eddy-driven and subtropical jets are two dynamically distinct features of the midlatitude upper-troposphere circulation that are often merged into a single zonal wind maximum. Nonetheless, the potential for a distinct ... -
Local Finite-Amplitude Wave Activity as a Diagnostic of Anomalous Weather Events
(American Meteorological Society, 2015)inite-amplitude Rossby wave activity (FAWA) proposed by Nakamura and Zhu measures the waviness of quasigeostrophic potential vorticity (PV) contours and the associated modification of the zonal-mean zonal circulation, but ... -
Simulated Sensitivity of Tropical Cyclone Size and Structure to the Atmospheric Temperature Profile
(American Meteorological Society, 2016)his study uses the WRF ARW to investigate how different atmospheric temperature environments impact the size and structure development of a simulated tropical cyclone (TC). In each simulation, the entire vertical virtual ... -
Sensitivity of Tornado Dynamics to Soil Debris Loading
(American Meteorological Society, 2016)ast numerical simulation studies found that debris loading from sand-sized particles may substantially affect tornado dynamics, causing reductions in near-surface wind speeds up to 50%. To further examine debris loading ... -
Impact of the Antarctic Ozone Hole on the Vertical Coupling of the Stratosphere–Mesosphere–Lower Thermosphere System
(American Meteorological Society, 2016)here is evidence that the strengthened stratospheric westerlies arising from the Antarctic ozone hole?induced cooling cause a polar mesospheric warming and a subsequent cooling in the lower thermosphere. While previous ... -
Mixed-Mode Oscillations of El Niño–Southern Oscillation
(American Meteorological Society, 2016)ery strong El Niño events occur sporadically every 10?20 yr. The origin of this bursting behavior still remains elusive. Using a simplified three-dimensional dynamical model of the tropical Pacific climate system, which ... -
Atmospheric Rotors and Severe Turbulence in a Long Deep Valley
(American Meteorological Society, 2015)he conceptual model of an atmospheric rotor is reexamined in the context of a valley, using data from the Terrain-Induced Rotor Experiment (T-REX) conducted in 2006 in the southern Sierra Nevada and Owens Valley, California. ... -
Factors Controlling Low-Cloud Evolution over the Eastern Subtropical Oceans: A Lagrangian Perspective Using the A-Train Satellites
(American Meteorological Society, 2015)Lagrangian technique is developed to sample satellite data to quantify and understand factors controlling temporal changes in low-cloud properties (cloud cover, areal-mean liquid water path, and droplet concentration). ... -
On the Role of the African Topography in the South Asian Monsoon
(American Meteorological Society, 2016)he Somali jet, a strong low-level cross-equatorial flow concentrated in a narrow longitudinal band near the coast of Somalia, is a key feature of the South Asian monsoon (SAM) circulation. Previous work has emphasized the ... -
On the Relationship between Inertial Instability, Poleward Momentum Surges, and Jet Intensifications near Midlatitude Cyclones
(American Meteorological Society, 2016)his study explores the role of inertial instability in poleward momentum surges and ?flare ups? of the subpolar jet near midlatitude cyclones. Two cases are simulated with the University of Wisconsin Nonhydrostatic Modeling ... -
A Model for the Complete Radial Structure of the Tropical Cyclone Wind Field. Part II: Wind Field Variability
(American Meteorological Society, 2016)art I of this work developed a simple physical model for the complete radial structure of the low-level azimuthal wind field in a tropical cyclone that compared well with observations. However, wind field variability in ... -
The Implementation of the Ice-Phase Microphysical Process into a Four-Dimensional Variational Doppler Radar Analysis System (VDRAS) and Its Impact on Parameter Retrieval and Quantitative Precipitation Nowcasting
(American Meteorological Society, 2015)he microphysical process of a cloud-scale model used by a four-dimensional Variational Doppler Radar Analysis System (VDRAS) is extended from its original warm rain parameterization scheme to a cold rain process containing ... -
Contribution of Tropical Waves to the Formation of Supertyphoon Megi (2010)
(American Meteorological Society, 2016)hrough observational analysis and numerical simulations, this study examines the roles of the Madden?Julian oscillation (MJO) and tropical waves in the three-stage formation of Supertyphoon Megi (2010) including 1) convective ...