Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2141-2160 of 13215
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The Sea Spray Contribution to Sensible Heat Flux
(American Meteorological Society, 2013)irect numerical simulations (DNS) of turbulent Couette flow are combined with Lagrangian point-particle tracking to investigate the effects of a dispersed phase on bulk passive heat transport when the two phases can exchange ... -
Comments on “Symmetric and Asymmetric Structures of Hurricane Boundary Layer in Coupled Atmosphere–Wave–Ocean Models and Observations”
(American Meteorological Society, 2014) -
Diurnal Lightning Variability over the Maritime Continent: Impact of Low-Level Winds, Cloudiness, and the MJO
(American Meteorological Society, 2013)ightning over the Maritime Continent exhibits a pronounced diurnal cycle. Daytime and evening lightning occurs near coastlines and over mountain slopes, driven by sea and valley breezes. Nocturnal and morning thunderstorms ... -
A Flexible Parameterization for Shortwave Optical Properties of Ice Crystals
(American Meteorological Society, 2014)parameterization is presented that provides extinction cross section σe, single-scattering albedo ?, and asymmetry parameter g of ice crystals for any combination of volume, projected area, aspect ratio, and crystal ... -
Some Aspects of Western Hemisphere Circulation and the Madden–Julian Oscillation
(American Meteorological Society, 2014)lthough the greatest variance in convection associated with the Madden?Julian oscillation (MJO) occurs over the Indo-Pacific warm pool, the MJO is associated with substantial circulation patterns in the tropics and the ... -
Understanding Midlatitude Jet Variability and Change Using Rossby Wave Chromatography: Poleward-Shifted Jets in Response to External Forcing
(American Meteorological Society, 2014)ossby wave chromatography (RWC) is implemented in a linearized barotropic model as a tool to understand the response of the midlatitude jet to external forcing. Given the background zonal-mean flow and the space?time ... -
Influence of Ice Particle Surface Roughening on the Global Cloud Radiative Effect
(American Meteorological Society, 2013)ce clouds influence the climate system by changing the radiation budget and large-scale circulation. Therefore, climate models need to have an accurate representation of ice clouds and their radiative effects. In this ... -
A Compact Model for the Stability Dependency of TKE Production–Destruction–Conversion Terms Valid for the Whole Range of Richardson Numbers
(American Meteorological Society, 2014)ecently, observational and numerical evidence has accumulated against the concept of a critical Richardson number Ricr beyond which too-stable stratification would extinguish turbulence. It also appeared that the characteristics ... -
Nighttime Turbulent Events in a Steep Valley: A Nested Large-Eddy Simulation Study
(American Meteorological Society, 2013)his numerical study investigates the nighttime flow dynamics in Owens Valley, California. Nested high-resolution large-eddy simulation (LES) is used to resolve stable boundary layer flows within the valley. On 17 April ... -
Aerosol Indirect Effects on Idealized Tropical Cyclone Dynamics
(American Meteorological Society, 2014)he desire to improve the forecasting skill of the intensity and size of tropical cyclones has prompted the investigation into numerous physical processes that can impact these quantities. The modification of cloud properties ... -
Understanding Midlatitude Jet Variability and Change Using Rossby Wave Chromatography: Wave–Mean Flow Interaction
(American Meteorological Society, 2014)ossby wave chromatography (RWC) is implemented in a linearized barotropic model as a tool to understand the interaction between the midlatitude jet and the eddy momentum fluxes (u?) in an idealized GCM. Given the background ... -
Subcloud-Layer Feedbacks Driven by the Mass Flux of Shallow Cumulus Convection over Land
(American Meteorological Society, 2013)he processes and feedbacks associated with the mass flux of shallow cumulus clouds over land are studied by analyzing the results from large-eddy simulations and a mixed-layer model. The primary focus is to study the ... -
A PDF-Based Microphysics Parameterization for Shallow Cumulus Clouds
(American Meteorological Society, 2013)nbiased calculations of microphysical process rates such as autoconversion and accretion in mesoscale numerical weather prediction models require that subgrid-scale (SGS) variability over the model grid volume be taken ... -
A Simple Technique to Infer the Missing Gravity Wave Drag in the Middle Atmosphere Using a General Circulation Model: Potential Vorticity Budget
(American Meteorological Society, 2013)simple technique to infer the missing momentum forcing in a general circulation model is developed and evaluated. The response of the large-scale dynamic equations to an external momentum forcing presents a nonlocal response ... -
Understanding Midlatitude Jet Variability and Change Using Rossby Wave Chromatography: Methodology
(American Meteorological Society, 2014)ossby wave chromatography (RWC) is implemented in a linearized barotropic model as a tool to diagnose and understand the interaction between the midlatitude jet and the eddies. Given the background zonal-mean flow and the ... -
Comment on “Direct Numerical Simulation of the Turbulent Ekman Layer: Evaluation of Closure Models”
(American Meteorological Society, 2014) -
Genesis of Hurricane Julia (2010) within an African Easterly Wave: Developing and Nondeveloping Members from WRF–LETKF Ensemble Forecasts
(American Meteorological Society, 2014)n this study, the predictability of and parametric differences in the genesis of Hurricane Julia (2010) are investigated using 20 mesoscale ensemble forecasts with the finest resolution of 1 km. Results show that the genesis ... -
Large-Eddy Simulations of Convective Boundary Layers over Flat and Urbanlike Surfaces
(American Meteorological Society, 2014)he effects of urbanlike surfaces with a block array on the dry convective boundary layer (CBL) are numerically investigated using the parallelized large-eddy simulation model. Five cases representing a free CBL, a sheared ... -
Parameter Study of Tropical Cyclones in Rotating Radiative–Convective Equilibrium with Column Physics and Resolution of a 25-km GCM
(American Meteorological Society, 2013)otating radiative?convective equilibrium is studied by extracting the column physics of a mesoscale-resolution global atmospheric model that simulates realistic hurricane frequency statistics and then coupling it to rotating ... -
Wind Shear and Buoyancy Reversal at the Top of Stratocumulus
(American Meteorological Society, 2013)numerical experiment is designed to study the interaction at the stratocumulus top between a mean vertical shear and the buoyancy reversal due to evaporative cooling, without radiative cooling. Direct numerical simulation ...