Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2601-2620 of 13215
-
An Analysis for the Applicability of Monin–Obukhov Similarity Theory in Stable Conditions
(American Meteorological Society, 2012)n analysis in a plane of the stability parameters ? = z/L (where z is a height above the ground surface and L is the Obukhov length) and bulk Richardson number RiB is proposed to examine the applicability of Monin?Obukhov ... -
Ice in Clouds Experiment—Layer Clouds. Part I: Ice Growth Rates Derived from Lenticular Wave Cloud Penetrations
(American Meteorological Society, 2011)enticular wave clouds are used as a natural laboratory to estimate the linear and mass growth rates of ice particles at temperatures from ?20° to ?32°C and to characterize the apparent rate of ice nucleation at water ... -
Outgoing Longwave Radiation due to Directly Transmitted Surface Emission
(American Meteorological Society, 2012)frequently used diagram summarizing the annual- and global-mean energy budget of the earth and atmosphere indicates that the irradiance reaching the top of the atmosphere from the surface, through the midinfrared atmospheric ... -
Excitation of Rainfall over the Tropical Western Pacific
(American Meteorological Society, 2012)he authors have examined 4 years of satellite-derived SST and rainfall data in anticipation of a relationship between SST structure and the excitation of convective rainfall. The results exhibit a strong excitation signal ... -
A Particle-Surface-Area-Based Parameterization of Immersion Freezing on Desert Dust Particles
(American Meteorological Society, 2012)n climate and weather models, the quantitative description of aerosol and cloud processes relies on simplified assumptions. This contributes major uncertainties to the prediction of global and regional climate change. ... -
Investigation of the Vertical Structure of Warm-Cloud Microphysical Properties Using the Cloud Evolution Diagram, CFODD, Simulated by a Three-Dimensional Spectral Bin Microphysical Model
(American Meteorological Society, 2012)his paper investigates the vertical structure of warm-cloud microphysical properties using a three-dimensional (3D) spectral bin microphysical model. A time series of contoured frequency by optical depth diagrams (CFODDs), ... -
Barotropic Impacts of Surface Friction on Eddy Kinetic Energy and Momentum Fluxes: An Alternative to the Barotropic Governor
(American Meteorological Society, 2012)s the surface drag is increased in a comprehensive general circulation model (GCM), the upper-level zonal winds decrease and eddy momentum flux convergence into the jet core increases. Globally averaged eddy kinetic energy ... -
Convective Momentum Transport by Rainbands within a Madden–Julian Oscillation in a Global Nonhydrostatic Model with Explicit Deep Convective Processes. Part I: Methodology and General Results
(American Meteorological Society, 2011)he convective momentum transport (CMT) properties of 13 215 rainbands within a Madden?Julian oscillation (MJO) event simulated by a global nonhydrostatic model are examined. CMT vectors, which represent horizontal accelerations ... -
Large-Eddy Simulation of Roll Vortices in a Hurricane Boundary Layer
(American Meteorological Society, 2012)or the last decade, horizontal roll vortices have been often observed in hurricane boundary layers (HBLs). In this study, a large-eddy simulation is performed to explore the formation mechanism of the horizontal roll ... -
Some Counterintuitive Dependencies of Tropical Cyclone Frequency on Parameters in a GCM
(American Meteorological Society, 2012)igh-resolution global climate models (GCMs) have been increasingly utilized for simulations of the global number and distribution of tropical cyclones (TCs), and how they might change with changing climate. In contrast, ... -
Improved Simulation of the South Asian Summer Monsoon in a Coupled GCM with a More Realistic Ocean Mixed Layer
(American Meteorological Society, 2012)imulation and prediction of the South Asian summer monsoon in a climate model remain a challenge despite intense efforts by the atmosphere and ocean research community. Because the phenomenon arises from the interaction ... -
Sensitivity of Tropical Cyclone Intensity to Ventilation in an Axisymmetric Model
(American Meteorological Society, 2012)he sensitivity of tropical cyclone intensity to ventilation of cooler, drier air into the inner core is examined using an axisymmetric tropical cyclone model with parameterized ventilation. Sufficiently strong ventilation ... -
Tropical and Subtropical Meridional Latent Heat Transports by Disturbances to the Zonal Mean and Their Role in the General Circulation
(American Meteorological Society, 2012)he spectrum of meridional latent heat transport in the tropics and subtropics by disturbances to the zonal mean during all seasons is analyzed. The transport is divided into stationary and transient planetary- and ... -
Mesoscale Structural Evolution of Three Tropical Weather Systems Observed during PREDICT
(American Meteorological Society, 2011)hree well-observed Atlantic tropical weather systems that occurred during the 2010 hurricane season are analyzed. One case was former Tropical Storm Gaston that failed to redevelop into a tropical cyclone; the other two ... -
Potential Vorticity Accumulation Following Atmospheric Kelvin Waves in the Active Convective Region of the MJO
(American Meteorological Society, 2012)revious works have shown that most of the rainfall embedded within the Madden?Julian oscillation (MJO) occurs in large eastward-moving envelopes of enhanced convection known as super cloud clusters. Many of these superclusters ... -
Dust Lofting and Ingestion by Supercell Storms
(American Meteorological Society, 2012)ecent research pertaining to aerosol impacts on cloud microphysics has shown a need for understanding mineral dust entrainment into moist convection. The goal of this study is to examine the pathways in which nonmicrophysically ... -
Eddy Diffusivities for Momentum and Heat in the Upper Troposphere and Lower Stratosphere Measured by MU Radar and RASS, and a Comparison of Turbulence Model Predictions
(American Meteorological Society, 2011)ecently, middle- and upper-atmosphere Doppler radar (MU radar) has enabled the measurement of middle-atmosphere turbulence from radar backscatter Doppler spectra. In this work, eddy diffusivities for momentum Km in the ... -
Mechanisms for Precipitation Enhancement in a North American Monsoon Upper-Tropospheric Trough
(American Meteorological Society, 2012)ropical upper-tropospheric troughs (TUTTs), transient summertime disturbances over the Pacific and Atlantic Oceans, are also observed to frequently occur in the North American monsoon (NAM) region. However, unlike TUTTs ... -
On Offshore Propagating Diurnal Waves
(American Meteorological Society, 2012)haracteristics and dynamics of offshore diurnal waves induced by land?sea differential heating are examined using linear theory. Two types of heating profiles are investigated, namely a shallow heating source confined ... -
Influence of Gravity Waves in the Tropical Upwelling: WACCM Simulations
(American Meteorological Society, 2011)he annual cycle of tropical upwelling and contributions by planetary and gravity waves are investigated from climatological simulations using the Whole Atmosphere Community Climate Model (WACCM) including three gravity ...