Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3201-3220 of 13215
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The Response of Westerly Jets to Thermal Driving in a Primitive Equation Model
(American Meteorological Society, 2005)The structure of westerly jets in a statistically steady state is investigated with both dry and moist models on the sphere. The dry model is forced with an idealized radiative equilibrium temperature profile that consists ... -
An Equation for Moist Entropy in a Precipitating and Icy Atmosphere
(American Meteorological Society, 2005)This paper addresses an equation for moist entropy in the framework of cloud-resolving models. After rewriting the energy equation with moist entropy in the place of temperature, an equation for moist entropy is obtained. ... -
A Barotropic Envelope Rossby Soliton Model for Block–Eddy Interaction. Part III: Wavenumber Conservation Theorems for Isolated Blocks and Deformed Eddies
(American Meteorological Society, 2005)In a series of previous papers, an envelope Rossby soliton theory was formulated to investigate the interaction between a preexisting planetary wave and synoptic-scale eddies leading to a typical blocking flow. In this ... -
A Method to Improve Prediction of Atmospheric Flow Transitions
(American Meteorological Society, 2005)Ensemble prediction has become an indispensable tool in weather forecasting. One of the issues in ensemble prediction is that, regardless of the method, the prediction error does not map well to the underlying physics ... -
Mesoscale Variability and Drizzle in Southeast Pacific Stratocumulus
(American Meteorological Society, 2005)Observations from the East Pacific Investigation of Climate (EPIC) 2001 field campaign are well suited for exploring the relationships among the diurnal cycle, mesoscale (10?100 km) structure, and precipitation in the ... -
Downward Control from the Lower Stratosphere?
(American Meteorological Society, 2005)The concept of downward control proposes a mechanism for the impact of the stratospheric circulation on the troposphere. Momentum forcing at upper-stratospheric levels induces a meridional circulation that eventually reaches ... -
Turbulence and Gravity Waves within an Upper-Level Front
(American Meteorological Society, 2005)High-resolution dropwindsonde and in-flight measurements collected by a research aircraft during the Severe Clear-Air Turbulence Colliding with Aircraft Traffic (SCATCAT) experiment and simulations from numerical models ... -
Lagrangian Velocity Correlations and Absolute Dispersion in the Midlatitude Troposphere
(American Meteorological Society, 2005)Employing daily wind data from the ECMWF, passive particle advection is performed to estimate the Lagrangian velocity correlation functions (LVCF) associated with the midlatitude tropospheric flow. In particular, the ... -
The Structure and Maintenance of Stationary Waves in the Winter Northern Hemisphere
(American Meteorological Society, 2005)Previous studies of extratropical stationary waves in the winter Northern Hemisphere (NH) often focused on effects of orography and land?ocean thermal contrast on the formation, structure, and maintenance of these waves. ... -
Mixed-Layer Budget Analysis of the Diurnal Cycle of Entrainment in Southeast Pacific Stratocumulus
(American Meteorological Society, 2005)Mixed-layer budgets of boundary layer mass, moisture, and liquid water static energy are estimated from 6 days of data collected at 20°S, 85°W (a region of persistent stratocumulus) during the East Pacific Investigation ... -
CORRIGENDUM
(American Meteorological Society, 2005) -
Modeling of the Melting Layer. Part III: The Density Effect
(American Meteorological Society, 2005)A model of the melting snow and its radar reflectivity is presented here. The main addition to previous description of the melting layer is the explicit introduction of snow density as a variable. The model is validated ... -
Mesoscale Modeling of Springtime Arctic Mixed-Phase Stratiform Clouds Using a New Two-Moment Bulk Microphysics Scheme
(American Meteorological Society, 2005)A new two-moment bulk microphysics scheme is implemented into the polar version of the fifth-generation Pennsylvania State University?NCAR Mesoscale Model (MM5) to simulate arctic mixed-phase boundary layer stratiform ... -
Radiative Effects of Cloud Horizontal Inhomogeneity and Vertical Overlap Identified from a Monthlong Cloud-Resolving Model Simulation
(American Meteorological Society, 2005)The representation of subgrid horizontal and vertical variability of clouds in radiation schemes remains a major challenge for general circulation models (GCMs) due to the lack of cloud-scale observations and incomplete ... -
Turbulence as a Mechanism for Orographic Precipitation Enhancement
(American Meteorological Society, 2005)This study examines the dynamical and microphysical mechanisms that enhance precipitation during the passage of winter midlatitude systems over mountain ranges. The study uses data obtained over the Oregon Cascade Mountains ... -
NOTES AND CORRESPONDENCE: Polarimetric Radar Observation of Multiple Freezing Levels
(American Meteorological Society, 2005)An unusual multiple freezing-level event observed with polarimetric radar during the second phase of the Improvement of Microphysical Parameterization through Observational Verification Experiments (IMPROVE-2) field program ... -
Interannual Variations of Total Ozone at Northern Midlatitudes Correlated with Stratospheric EP Flux and Potential Vorticity
(American Meteorological Society, 2005)At northern midlatitudes over the 1979?2002 time period, column ozone trends are observed to have maximum negative amplitudes in February and March. Here, the portion of the observed ozone interannual variability and trends ... -
Impact of Aerosol Intrusions on Arctic Boundary Layer Clouds. Part II: Sea Ice Melting Rates
(American Meteorological Society, 2005)The potential impact of intrusions of polluted air into the Arctic basin on sea ice melting rates and the surface energy budget is examined. This paper extends a previous study to cloud-resolving simulations of the entire ... -
Excitation of Transient Rossby Waves on the Stratospheric Polar Vortex and the Barotropic Sudden Warming
(American Meteorological Society, 2005)The excitation of Rossby waves on the edge of the stratospheric polar vortex, due to time-dependent topographic forcing, is studied analytically and numerically in a simple quasigeostrophic f-plane model. When the atmosphere ... -
Evolution of a Cold Front Encountering Steep Quasi-2D Terrain: Coordinated Aircraft Observations on 8–9 December 2001 during IMPROVE-2
(American Meteorological Society, 2005)Research aircraft observations from the 8?9 December 2001 case of the second phase of the Improvement of Microphysical Parameterization through Operational Verification Experiment (IMPROVE-2) describe the evolution of a ...