Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1821-1840 of 13215
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On the Role of Inertial Instability in Stratosphere–Troposphere Exchange near Midlatitude Cyclones
(American Meteorological Society, 2015)n simulations of midlatitude cyclones with the University of Wisconsin Nonhydrostatic Modeling System (UWNMS), mesoscale regions with large negative absolute vorticity commonly occur in the upper troposphere and lower ... -
Drop Size Distributions and Radar Observations of Convective and Stratiform Rain over the Equatorial Indian and West Pacific Oceans
(American Meteorological Society, 2015)wo-dimensional video disdrometer (2DVD) data were analyzed from two equatorial Indian (Gan) and west Pacific Ocean (Manus) islands where precipitation is primarily organized by the intertropical convergence zone and the ... -
Assessing the Impact of the Tropopause on Mountain Waves and Orographic Precipitation Using Linear Theory and Numerical Simulations
(American Meteorological Society, 2014)he partial reflection of mountain waves at the tropopause has been studied extensively for its contribution to downslope windstorms, but its impact on orographic precipitation has not been addressed. Here linear theory and ... -
Sounding-Based Thermodynamic Budgets for DYNAMO
(American Meteorological Society, 2014)he Dynamics of the Madden?Julian Oscillation (DYNAMO) field campaign, conducted over the Indian Ocean from October 2011 to March 2012, was designed to study the initiation of the Madden?Julian oscillation (MJO). Two prominent ... -
Variation of Lightning and Convective Rain Fraction in Mesoscale Convective Systems of the MJO
(American Meteorological Society, 2015)haracteristics of mesoscale convective systems (MCSs) in regions affected by the Madden?Julian oscillation (MJO) are investigated using a database of MCSs observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) ... -
Impact of the 2011 Southern U.S. Drought on Ground-Level Fine Aerosol Concentration in Summertime
(American Meteorological Society, 2014)his study investigates the impacts of the 2011 severe drought in the southern United States on ground-level fine aerosol (PM2.5) concentrations in the summer. The changes in surface concentrations and planetary boundary ... -
Contributions of Surface Sensible Heat Fluxes to Tropical Cyclone. Part I: Evolution of Tropical Cyclone Intensity and Structure
(American Meteorological Society, 2014)he contributions of surface sensible heat fluxes (SHX) to the evolution of tropical cyclone (TC) intensity and structure are examined in this study by conducting cloud-resolving simulations. Results suggest that although ... -
CORRIGENDUM
(American Meteorological Society, 2014) -
Atmospheric Response to Mesoscale Sea Surface Temperature Anomalies: Assessment of Mechanisms and Coupling Strength in a High-Resolution Coupled Model over the South Atlantic
(American Meteorological Society, 2014)any aspects of the coupling between the ocean and atmosphere at the mesoscale (on the order of 20?100 km) remain unknown. While recent observations from the Southern Ocean revealed that circular fronts associated with ... -
Aspects of Potential Vorticity Fluxes: Climatology and Impermeability
(American Meteorological Society, 2015)ome aspects of the dynamics of generalized potential vorticity (PV) density P = ? ? ?? are discussed with the main emphasis on P fluxes, where ?a is absolute vorticity and ? is a scalar. The impermeability theorem claims ... -
Ice Crystal Habits and Growth Processes in Stratiform Clouds with Embedded Convection Examined through Aircraft Observation in Northern China
(American Meteorological Society, 2015)ce crystal habits and growth processes in two cases of stratiform clouds with embedded convection are investigated using data observed simultaneously from three aircraft on 18 April 2009 and 1 May 2009 as part of the Beijing ... -
A Triggering Mechanism for Rapid Intensification of Tropical Cyclones
(American Meteorological Society, 2015)riggering processes for the rapidly intensifying phase of a tropical cyclone (TC) were investigated on the basis of numerical experiments using a three-dimensional nonhydrostatic model. The results revealed that the rapid ... -
Inertial Motion Viewed from a Potential Well
(American Meteorological Society, 2014)he motion of a mass undergoing free horizontal motion on a planet?s surface is analyzed in an inertial frame by using a potential well presentation. The following results from the conventional analysis in rotating coordinates ... -
Estimating Dependence of the Turbulent Length Scales on Model Resolution Based on A Priori Analysis
(American Meteorological Society, 2014)he Reynolds-averaged Navier?Stokes simulation (RANS) and the large-eddy simulation (LES) have been widely used to parameterize unresolved turbulent motions for the atmospheric boundary layer. However, there is an intermediate ... -
Seasonal Variability of the Polar Stratospheric Vortex in an Idealized AGCM with Varying Tropospheric Wave Forcing
(American Meteorological Society, 2015)he seasonal variability of the polar stratospheric vortex is studied in a simplified AGCM driven by specified equilibrium temperature distributions. Seasonal variations in equilibrium temperature are imposed in the ... -
Large-Eddy Simulation of Turbulent Barotropic Flows in Spectral Space on a Sphere
(American Meteorological Society, 2015)umerical simulations of atmospheric circulation models are limited by their finite spatial resolution, so large-eddy simulation (LES) is a preferred approach to study these models. In LES, a low-pass filter is applied to ... -
Fast and Accurate Radiative Transfer in the Thermal Regime by Simultaneous Optimal Spectral Sampling over All Channels
(American Meteorological Society, 2015)he optimal spectral sampling (OSS) method provides a fast and accurate way to model radiometric observations and their Jacobians (required for inversion problems) as a linear combination of monochromatic quantities. The ... -
Fitting and Analyzing LES Using Multiple Trivariate Gaussians
(American Meteorological Society, 2014)ssumed-PDF methods for the parameterization of subgrid-scale processes in atmospheric models provide many benefits. Many currently used assumed-PDF schemes reconcile the high number of required PDF parameters with the ... -
Analysis of WRF-Simulated Diurnal Boundary Layer Winds in Eastern China Using a Simple 1D Model
(American Meteorological Society, 2014)he low-level diurnal winds for different locations of eastern China are documented using the June 2006?11 hourly model data simulated with the Weather Research and Forecasting (WRF) mesoscale model with a 9-km horizontal ... -
An Analysis of a Barotropically Unstable, High–Rossby Number Vortex in Shear
(American Meteorological Society, 2015)he interactions of the barotropic instability found at low levels in tropical cyclones and a shear forcing are presented. Previous works have indicated that at low levels of tropical cyclones, the inner edge of the core ...