Journal of the Atmospheric Sciences: Recent submissions
Now showing items 981-1000 of 13215
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Reply to “Comments on ‘The Gulf Stream Convergence Zone in the Time-Mean Winds’”
(American Meteorological Society, 2018) -
A Numerical Study on the Aerodynamics of Freely Falling Planar Ice Crystals
(American Meteorological Society, 2018)AbstractFluid flow fields and fall patterns of falling planar ice crystals are studied by numerically solving the unsteady, incompressible Navier?Stokes equations using a commercially available computational fluid dynamics ... -
Concentric Eyewall Formation in Typhoon Sinlaku (2008). Part III: Horizontal Momentum Budget Analyses
(American Meteorological Society, 2018)Abstract This is a follow-up work to two prior studies examining secondary eyewall formation (SEF) in Typhoon Sinlaku (2008). This study shows that, in the SEF region, the majority of the elevated winds are supergradient. ... -
A Comprehensive Observational Study of Graupel and Hail Terminal Velocity, Mass Flux, and Kinetic Energy
(American Meteorological Society, 2018)AbstractThis study uses novel approaches to estimate the fall characteristics of hail, covering a size range from about 0.5 to 7 cm, and the drag coefficients of lump and conical graupel. Three-dimensional (3D) volume scans ... -
Wind Shear Effects on Radiatively and Evaporatively Driven Stratocumulus Tops
(American Meteorological Society, 2018)AbstractDirect numerical simulations resolving meter and submeter scales in the cloud-top region of stratocumulus are used to investigate the interactions between a mean vertical wind shear and in-cloud turbulence driven ... -
The Evolution of Vortex Tilt and Vertical Motion of Tropical Cyclones in Directional Shear Flows
(American Meteorological Society, 2018)AbstractRecent studies have demonstrated the importance of moist dynamics on the intensification variability of tropical cyclones (TCs) in directional shear flows. Here, we propose that dry dynamics can account for many ... -
Determination of Best Tropopause Definition for Convective Transport Studies
(American Meteorological Society, 2018)AbstractAn idealized three-dimensional cloud-resolving model is used to investigate the sensitivity of cross-tropopause convective mass transport to tropopause definition. A simulation is conducted to encompass the growth ... -
A Turbulence Scheme with Two Prognostic Turbulence Energies
(American Meteorological Society, 2018)AbstractA new turbulence scheme with two prognostic energies is presented. The scheme is an extension of a turbulence kinetic energy (TKE) scheme following the ideas of Zilitinkevich et al. but valid for the whole stability ... -
The Competing Effects of Stability and Humidity on Subtropical Stratocumulus Entrainment and Cloud Evolution from a Lagrangian Perspective
(American Meteorological Society, 2018)AbstractThe evolution of subtropical stratocumulus clouds and the boundary layer is studied on daily time scales from the Lagrangian perspective, following the flow. Measures of humidity above the boundary layer and of ... -
Reply to “Comments on ‘Revisiting the Balanced and Unbalanced Aspects of Tropical Cyclone Intensification’”
(American Meteorological Society, 2018)AbstractIn their comment, Montgomery and Smith critique the recent study of Heng et al. that revisited the balanced and unbalanced aspects of tropical cyclone (TC) intensification based on diagnostics of a full-physics ... -
Climate Dependence in Empirical Parameters of Subgrid-Scale Parameterizations using the Fluctuation–Dissipation Theorem
(American Meteorological Society, 2018)AbstractMany subgrid-scale (SGS) parameterizations in climate models contain empirical parameters and are thus data dependent. In particular, it is not guaranteed that the SGS parameterization still helps the model to ... -
Analysis of Cloud-Resolving Model Simulations for Scale Dependence of Convective Momentum Transport
(American Meteorological Society, 2018)AbstractWe use 3D cloud-resolving model (CRM) simulations of two mesoscale convective systems at midlatitudes and a simple statistical ensemble method to diagnose the scale dependency of convective momentum transport (CMT) ... -
Monin–Obukhov Similarity and Local-Free-Convection Scaling in the Atmospheric Boundary Layer Using Matched Asymptotic Expansions
(American Meteorological Society, 2018)AbstractThe Monin?Obukhov similarity theory (MOST) is the foundation for understanding the atmospheric surface layer. It hypothesizes that nondimensional surface-layer statistics are functions of only, where z and L are ... -
Improvement of the Simulation of Cloud Longwave Scattering in Broadband Radiative Transfer Models
(American Meteorological Society, 2018)AbstractCloud longwave scattering is generally neglected in general circulation models (GCMs), but it plays a significant and highly uncertain role in the atmospheric energy budget as demonstrated in recent studies. To ... -
A Possible Three-Dimensional Mechanism for Oscillating Wobbles in Tropical Cyclone–Like Vortices with Concentric Eyewalls
(American Meteorological Society, 2018)AbstractIt is known that concentric eyewalls can influence tropical cyclone (TC) intensity. However, they can also influence TC track. Observations indicate that TCs with concentric eyewalls are often accompanied by wobbling ... -
Investigating the Relative Contributions of Charge Deposition and Turbulence in Organizing Charge within a Thunderstorm
(American Meteorological Society, 2018)AbstractLarge-eddy-resolving simulations using the Collaborative Model for Multiscale Atmospheric Simulation (COMMAS), which contains microphysical charging and branched-lightning parameterizations, produce much more complex ... -
Influence of Turbulent Fluctuations on Cloud Droplet Size Dispersion and Aerosol Indirect Effects
(American Meteorological Society, 2018)AbstractCloud droplet relative dispersion, defined as the standard deviation over the mean cloud droplet size, is of central importance in determining and understanding aerosol indirect effects. In recent work, it was found ... -
The Vertical Structure of Annular Modes
(American Meteorological Society, 2018)AbstractStratosphere?troposphere interactions are conventionally characterized using the first empirical orthogonal function (EOF) of fields such as zonal-mean zonal wind. Perpetual-winter integrations of an idealized model ... -
Diurnal Cycle of Rainfall and Winds near the South Coast of China
(American Meteorological Society, 2018)AbstractThe characteristics and mechanisms of diurnal rainfall and winds near the south coast of China are explored using satellite data (CMORPH), long-term hourly WRF Model data (Du model data), a simple 2D linear model, ... -
Impacts of Ice Particle Shape and Density Evolution on the Distribution of Orographic Precipitation
(American Meteorological Society, 2018)AbstractAn IMPROVE-2 orographic precipitation case is simulated using the Ice-Spheroids Habit Model with Aspect-Ratio Evolution (ISHMAEL) microphysics. In ISHMAEL, the evolution of ice particle properties such as mass, ...