Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1421-1440 of 13215
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On the Role of Surface Fluxes and WISHE in Tropical Cyclone Intensification
(American Meteorological Society, 2016)he authors show that the feedback between surface wind and surface enthalpy flux is an important influence on tropical cyclone evolution, even though, as with at least some classical instability mechanisms, such a feedback ... -
A Numerical Investigation of Cumulus Thermals
(American Meteorological Society, 2016)lthough the steady, entraining, updraft plume is widely taken as the foundational concept of cumulus convection, past studies show that convection is typically dominated by thermals that are transient, more isotropic in ... -
Effects of Rotation Rate and Seasonal Forcing on the ITCZ Extent in Planetary Atmospheres
(American Meteorological Society, 2016)he authors study a wide range of atmospheric circulations with an idealized moist general circulation model to evaluate the mechanisms controlling intertropical convergence zone (ITCZ) migrations. They employ a zonally ... -
The Importance of the Shape of Cloud Droplet Size Distributions in Shallow Cumulus Clouds. Part II: Bulk Microphysics Simulations
(American Meteorological Society, 2016)n this two-part study, relationships between the cloud gamma size distribution shape parameter, microphysical processes, and cloud characteristics of nonprecipitating shallow cumulus clouds are investigated using large-eddy ... -
Role of Radiative–Convective Feedbacks in Spontaneous Tropical Cyclogenesis in Idealized Numerical Simulations
(American Meteorological Society, 2016)he authors perform 3D cloud-resolving simulations of radiative?convective equilibrium (RCE) in a rotating framework, with interactive radiation and surface fluxes and fixed sea surface temperature. A tropical cyclone is ... -
Constraining Precipitation Susceptibility of Warm-, Ice-, and Mixed-Phase Clouds with Microphysical Equations
(American Meteorological Society, 2016)he strength of the effective anthropogenic climate forcing from aerosol?cloud interactions is related to the susceptibility of precipitation to aerosol effects. Precipitation susceptibility d lnP/d lnN has been proposed ... -
The Importance of the Shape of Cloud Droplet Size Distributions in Shallow Cumulus Clouds. Part I: Bin Microphysics Simulations
(American Meteorological Society, 2016)n this two-part study, the relationships between the width of the cloud droplet size distribution and the microphysical processes and cloud characteristics of nonprecipitating shallow cumulus clouds are investigated using ... -
On the Gravity Wave Forcing during the Southern Stratospheric Final Warming in LMDZ
(American Meteorological Society, 2016)he austral stratospheric final warming date is often predicted with substantial delay in several climate models. This systematic error is generally attributed to insufficient parameterized gravity wave (GW) drag in the ... -
What Causes Weak Orographic Rain Shadows? Insights from Case Studies in the Cascades and Idealized Simulations
(American Meteorological Society, 2016)ecent studies have shown that weak rain shadows in the Cascade Mountains are associated with passing warm fronts, but the specific mechanisms responsible for this connection have eluded consensus. One theory holds that ... -
The Effect of Eddy–Eddy Interactions on Jet Formation and Macroturbulent Scales
(American Meteorological Society, 2016)he effect of eddy?eddy interactions on zonal and meridional macroturbulent scales is investigated over a wide range of eddy scales, using high-resolution idealized GCM simulations with and without eddy?eddy interactions. ... -
Condensational Growth of Drops Formed on Giant Sea-Salt Aerosol Particles
(American Meteorological Society, 2016)he most basic aspect of cloud formation is condensational growth onto cloud condensation nuclei (CCN). As such, condensational growth of cloud drops is often assumed to be a well-understood process described by the drop ... -
Quasi-Spherical Ice in Convective Clouds
(American Meteorological Society, 2016)omogeneous freezing of supercooled droplets occurs in convective systems in low and midlatitudes. This droplet-freezing process leads to the formation of a large amount of small ice particles, so-called frozen droplets, ... -
Response of Marine Boundary Layer Cloud Properties to Aerosol Perturbations Associated with Meteorological Conditions from the 19-Month AMF-Azores Campaign
(American Meteorological Society, 2016)his study investigates the response of marine boundary layer (MBL) cloud properties to aerosol loading by accounting for the contributions of large-scale dynamic and thermodynamic conditions and quantifies the first indirect ... -
Whirlwinds and Hairpins in the Atmospheric Surface Layer
(American Meteorological Society, 2016)ortices in the atmospheric surface layer are characterized using observations at unprecedented resolution from a fixed array of 31 turbulence sensors. During the day, these vortices likely are dust devils, though no visual ... -
Untangling Microphysical Impacts on Deep Convection Applying a Novel Modeling Methodology. Part II: Double-Moment Microphysics
(American Meteorological Society, 2016)he suggested impact of pollution on deep convection dynamics, referred to as the convective invigoration, is investigated in simulations applying microphysical piggybacking and a comprehensive double-moment bulk microphysics ... -
On the Relative Contribution of Inertia–Gravity Wave Radiation to Asymmetric Instabilities in Tropical Cyclone–like Vortices
(American Meteorological Society, 2016)ntense atmospheric vortices such as tropical cyclones experience various asymmetric instabilities during their life cycles. This study investigates how vortex properties and ambient conditions determine the relative ... -
Distinct Impacts of Aerosols on an Evolving Continental Cloud Complex during the RACORO Field Campaign
(American Meteorological Society, 2016)continental cloud complex, consisting of shallow cumuli, a deep convective cloud (DCC), and stratus, is simulated by a cloud-resolving Weather Research and Forecasting Model to investigate the aerosol microphysical effect ... -
An Observationally Based Global Band-by-Band Surface Emissivity Dataset for Climate and Weather Simulations
(American Meteorological Society, 2016)hile current atmospheric general circulation models (GCMs) still treat the surface as a blackbody in their longwave radiation scheme, recent studies suggest the need for taking realistic surface spectral emissivity into ... -
The Impact of Moist Frontogenesis and Tropopause Undulation on the Intensity, Size, and Structural Changes of Hurricane Sandy (2012)
(American Meteorological Society, 2016)his study examines the relative roles of moist frontogenesis and tropopause undulation in determining the intensity, size, and structural changes of Hurricane Sandy using a high-resolution cloud-resolving model. A 138-h ... -
Observations of Large Wind Shear above the Marine Boundary Layer near Point Buchon, California
(American Meteorological Society, 2016)articularly strong winds along the coast of Southern California on 24 May 2012 were measured by the Wyoming King Air research aircraft during the Precision Atmospheric Marine Boundary Layer Experiment (PreAMBLE). The fast ...