Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3141-3160 of 13215
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Remote Sensing of Cirrus Cloud Particle Size and Optical Depth Using Polarimetric Sensor Measurements
(American Meteorological Society, 2005)This paper presents a conceptual approach toward the remote sensing of cirrus cloud particle size and optical depth using the degree of polarization and polarized reflectance associated with the first three Stokes parameters, ... -
Vortex–Vortex Interactions in the Winter Stratosphere
(American Meteorological Society, 2006)This paper examines the interaction of oppositely signed vortices in the compressible (non-Boussinesq) quasigeostrophic system, with a view to understanding vortex interactions in the polar winter stratosphere. A series ... -
Shear and Static Instability of Inertia–Gravity Wave Packets: Short-Term Modal and Nonmodal Growth
(American Meteorological Society, 2006)The problem of nonmodal instabilities of inertia?gravity waves (IGW) in the middle atmosphere is addressed, within the framework of a Boussinesq model with realistic molecular viscosity and thermal diffusion, by singular-vector ... -
Updraft/Downdraft Constraints for Moist Baroclinic Modes and Their Implications for the Short-Wave Cutoff and Maximum Growth Rate
(American Meteorological Society, 2005)This paper examines the dynamics of moist baroclinic modes, based on the idealized model of moist baroclinic instability devised by Emanuel et al. These authors found that the finite static stability along the downdraft ... -
Association of Tropical Cirrus in the 10–15-km Layer with Deep Convective Sources: An Observational Study Combining Millimeter Radar Data and Satellite-Derived Trajectories
(American Meteorological Society, 2006)In this paper, millimeter cloud radar (MMCR) and Geosynchronous Meteorological Satellite (GMS) data are combined to study the properties of tropical cirrus that are common in the 10?15-km layer of the tropical troposphere ... -
Geographical Dependence of Upper-Level Blocking Formation Associated with Intraseasonal Amplification of the Siberian High
(American Meteorological Society, 2005)Intraseasonal amplification events of the surface Siberian high in winter are generally associated with blocking ridge formation in the upper troposphere. Composite analysis applied to the 20 strongest intraseasonal events ... -
Mechanisms of Intraseasonal Amplification of the Cold Siberian High
(American Meteorological Society, 2005)Mechanisms of intraseasonal amplification of the Siberian high are investigated on the basis of composite anomaly evolution for its strongest events at each of the grid points over Siberia. At each location, the amplification ... -
Variability in the Southerly Flow into the Eastern Pacific ITCZ
(American Meteorological Society, 2005)During boreal summer and fall, there is a strong southerly boundary layer flow across the equator into the east Pacific intertropical convergence zone (ITCZ). The modulation of this flow on synoptic to seasonal time scales ... -
The Response Time of the Temperature of the Equatorial Troposphere to ENSO Heating
(American Meteorological Society, 2005)Air temperature anomalies, averaged over the troposphere to 200 mb and around the earth from 10°S to 10°N, lag the similarly averaged El Niño?Southern Oscillation (ENSO) atmospheric latent heating anomalies by about one ... -
A Microphysical Bulk Formulation Based on Scaling Normalization of the Particle Size Distribution. Part I: Description
(American Meteorological Society, 2005)The authors address the problem of optimization of the microphysical information extracted from a simulation system composed of high-resolution numerical models and multiparameter radar data or other available measurements. ... -
Supplying Local Microphysics Parameterizations with Information about Subgrid Variability: Latin Hypercube Sampling
(American Meteorological Society, 2005)One problem in computing cloud microphysical processes in coarse-resolution numerical models is that many microphysical processes are nonlinear and small in scale. Consequently, there are inaccuracies if microphysics ... -
A Microphysical Bulk Formulation Based on Scaling Normalization of the Particle Size Distribution. Part II: Data Assimilation into Physical Processes
(American Meteorological Society, 2005)Microphysical schemes based on the scaling normalization of the particle size distribution (PSD) are cast into a variational data assimilation method to assess their ability to retrieve the precipitation structure and ... -
Fall Velocities of Hydrometeors in the Atmosphere: Refinements to a Continuous Analytical Power Law
(American Meteorological Society, 2005)This paper extends the previous research of the authors on the unified representation of fall velocities for both liquid and crystalline particles as a power law over the entire size range of hydrometeors observed in the ... -
Experimental Studies of Droplet Evaporation Kinetics: Validation of Models for Binary and Ternary Aqueous Solutions
(American Meteorological Society, 2005)Experiments were conducted with an electrodynamic levitation system to study the kinetics of droplet evaporation under chemically rich conditions. Single solution droplets of known composition (HNO3/H2O or H2SO4/HNO3/H2O) ... -
Constraints on Wave Drag Parameterization Schemes for Simulating the Quasi-Biennial Oscillation. Part I: Gravity Wave Forcing
(American Meteorological Society, 2005)Parameterization schemes for the drag due to atmospheric gravity waves are discussed and compared in the context of a simple one-dimensional model of the quasi-biennial oscillation (QBO). A number of fundamental issues are ... -
An Energy-Balance Analysis of Deep Convective Self-Aggregation above Uniform SST
(American Meteorological Society, 2005)The spatial organization of deep moist convection in radiative?convective equilibrium over a constant sea surface temperature is studied. A 100-day simulation is performed with a three-dimensional cloud-resolving model ... -
Constraints on Wave Drag Parameterization Schemes for Simulating the Quasi-Biennial Oscillation. Part II: Combined Effects of Gravity Waves and Equatorial Planetary Waves
(American Meteorological Society, 2005)This study examines the effect of combining equatorial planetary wave drag and gravity wave drag in a one-dimensional zonal mean model of the quasi-biennial oscillation (QBO). Several different combinations of planetary ... -
Edge Wave Asymmetries
(American Meteorological Society, 2006)Meridional asymmetry arising from the inclusion of meridional variation in the Coriolis parameter is shown to be a fundamental property of the higher-order dynamics of Eady edge waves. This asymmetry may be relevant to ... -
Microphysical and Geometrical Controls on the Pattern of Orographic Precipitation
(American Meteorological Society, 2006)Patterns of orographic precipitation can vary significantly both in time and space, and such variations must ultimately be related to mountain geometry, cloud microphysics, and synoptic conditions. Here an extension of the ... -
The 29 June 2000 Supercell Observed during STEPS. Part II: Lightning and Charge Structure
(American Meteorological Society, 2005)This second part of a two-part study examines the lightning and charge structure evolution of the 29 June 2000 tornadic supercell observed during the Severe Thunderstorm Electrification and Precipitation Study (STEPS). ...