Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2241-2260 of 13215
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Tropical Outgoing Longwave Radiation and Longwave Cloud Forcing Diurnal Cycles from CERES
(American Meteorological Society, 2012)he diurnal cycle is a fundamental earth system variability driven by daily variations in solar insolation. Understanding diurnal variability is important for characterizing top-of-atmosphere and surface energy budgets. ... -
The Vertical Structure of the Eddy Diffusivity and the Equilibration of the Extratropical Atmosphere
(American Meteorological Society, 2012)bservations suggest that the time- and zonal-mean state of the extratropical atmosphere adjusts itself such that the so-called ?criticality parameter? (which relates the vertical stratification to the horizontal temperature ... -
The Roles of Asymmetric Inflow Forcing Induced by Outer Rainbands in Tropical Cyclone Secondary Eyewall Formation
(American Meteorological Society, 2012)his study analyzes the secondary eyewall formation (SEF) process in an idealized cloud-resolving simulation of a tropical cyclone. In particular, the unbalanced boundary layer response to asymmetric inflow forcing induced ... -
The Role of Stationary Eddies in Shaping Midlatitude Storm Tracks
(American Meteorological Society, 2013)ransient and stationary eddies shape the extratropical climate through their transport of heat, moisture, and momentum. In the zonal mean, the transports by transient eddies dominate over those by stationary eddies, but ... -
Latent Heating and Cooling Rates in Developing and Nondeveloping Tropical Disturbances during TCS-08: TRMM PR versus ELDORA Retrievals
(American Meteorological Society, 2012)nique sets of Electra Doppler Radar (ELDORA) observations in both developing and nondeveloping tropical disturbances in the western North Pacific are used to retrieve latent heating and cooling rates. During the reintensification ... -
Formation Mechanism of Dust Devil–Like Vortices in Idealized Convective Mixed Layers
(American Meteorological Society, 2012)ust devils are small-scale vertical vortices often observed over deserts or bare land during the daytime under fair weather conditions. Previous numerical studies have demonstrated that dust devil?like vertical vortices ... -
Improvements to an Empirical Parameterization of Heterogeneous Ice Nucleation and Its Comparison with Observations
(American Meteorological Society, 2012)framework for an empirical parameterization (EP) of heterogeneous nucleation of ice crystals by multiple species of aerosol material in clouds was proposed in a 2008 paper by the authors. The present paper reports improvements ... -
Idealized Annually Averaged Macroturbulent Hadley Circulation in a Shallow-Water Model
(American Meteorological Society, 2012)he interaction of midlatitude eddies and the thermally driven Hadley circulation is studied using an idealized shallow-water model on the rotating sphere. The contributions of the annually averaged differential heating, ... -
Microphysical Processes Evident in Aerosol Forcing of Tropical Deep Convective Clouds
(American Meteorological Society, 2012)his study investigates the effects of aerosols on tropical deep convective clouds (DCCs). A series of large-scale, two-dimensional cloud-resolving model simulations was completed, differing only in the concentration of ... -
Estimation of Atmospheric Duct Structure Using Radar Sea Clutter
(American Meteorological Society, 2012)etrieving atmospheric refractivity profiles from the sea surface backscattered radar clutter is known as the refractivity-from-clutter (RFC) technique. Because the relationship between refractivity and radar sea clutter ... -
Supersaturation and Diffusional Droplet Growth in Liquid Clouds
(American Meteorological Society, 2012)he process of collective diffusional growth of droplets in an adiabatic parcel ascending or descending with the constant vertical velocity is analyzed in the frame of the regular condensation approach. Closed equations for ... -
Reply to “Comments on ‘The Usefulness of Piecewise Potential Vorticity Inversion’”
(American Meteorological Society, 2012) -
On the Equivalence of Two Schemes for Convective Momentum Transport
(American Meteorological Society, 2012)he Gregory?Kershaw?Inness (GKI) parameterization of convective momentum transport, which has a tunable parameter C, is shown to be identical to a parameterization with no pressure gradient force and a mass flux smaller by ... -
Leaky Rigid Lid: New Dissipative Modes in the Troposphere
(American Meteorological Society, 2013)n effective boundary condition is derived for the top of the troposphere, based on a wave radiation condition at the tropopause. This boundary condition, which can be formulated as a pseudodifferential equation, leads to ... -
Estimation of Mixed-Phase Cloud Optical Depth and Position Using In Situ Radiation and Cloud Microphysical Measurements Obtained from a Tethered-Balloon Platform
(American Meteorological Society, 2012)icrophysical and radiative measurements in boundary layer mixed-phase clouds (MPCs), consisting of ice crystals and liquid droplets, have been analyzed. These cloud measurements were collected during a May?June 2008 ... -
The Cessation of Continuous Turbulence as Precursor of the Very Stable Nocturnal Boundary Layer
(American Meteorological Society, 2012)he mechanism behind the collapse of turbulence in the evening as a precursor to the onset of the very stable boundary layer is investigated. To this end a cooled, pressure-driven flow is investigated by means of a local ... -
A Theory for the Lower-Tropospheric Structure of the Moist Isentropic Circulation
(American Meteorological Society, 2012)theoretical model describing the structure of the dry and moist isentropic circulations in the lower troposphere is derived. It decomposes the meridional flow in the troposphere into three contributions: a dry equatorward ... -
Freezing of Raindrops in Deep Convective Updrafts: A Microphysical and Polarimetric Model
(American Meteorological Society, 2012)olarimetric radar observations of convective storms routinely reveal positive differential reflectivity ZDR extending above the 0°C level, indicative of the presence of supercooled liquid particles lofted by the storm?s ... -
Self-Organized Criticality and Homeostasis in Atmospheric Convective Organization
(American Meteorological Society, 2012)tmospheric convection has a tendency to organize on a hierarchy of scales ranging from the mesoscale to the planetary scales, with the latter especially manifested by the Madden?Julian oscillation. The present paper examines ... -
On the Rapid Intensification of Hurricane Wilma (2005). Part II: Convective Bursts and the Upper-Level Warm Core
(American Meteorological Society, 2012)revious studies have focused mostly on the roles of environmental factors in the rapid intensification (RI) of tropical cyclones (TCs) because of the lack of high-resolution data in inner-core regions. In this study, the ...