Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2881-2900 of 13215
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Extreme Value Statistics of the Total Energy in an Intermediate-Complexity Model of the Midlatitude Atmospheric Jet. Part I: Stationary Case
(American Meteorological Society, 2007)A baroclinic model of intermediate complexity for the atmospheric jet at middle latitudes is used as a stochastic generator of atmosphere-like time series. In this case, time series of the total energy of the system are ... -
Radiative Transfer Simulations Using Mesoscale Cloud Model Outputs: Comparisons with Passive Microwave and Infrared Satellite Observations for Midlatitudes
(American Meteorological Society, 2007)Real midlatitude meteorological cases are simulated over western Europe with the cloud mesoscale model Méso-NH, and the outputs are used to calculate brightness temperatures at microwave frequencies with the Atmospheric ... -
Using Satellite Observations to Constrain Parameterizations of Gravity Wave Effects for Global Models
(American Meteorological Society, 2007)Small-scale gravity waves are common features in atmospheric temperature observations. In satellite observations, these waves have been traditionally difficult to resolve because the footprint or resolution of the measurements ... -
Refinements to Ice Particle Mass Dimensional and Terminal Velocity Relationships for Ice Clouds. Part I: Temperature Dependence
(American Meteorological Society, 2007)This two-part study attempts to find appropriate mass dimension and terminal velocity relationships that, when considered together with particle size distributions (PSD), agree with coincident measurements of ice water ... -
Genesis of the Northeast Brazil Upper-Tropospheric Cyclonic Vortex: A Primitive Equation Barotropic Instability Study
(American Meteorological Society, 2007)The primitive equation barotropic unstable linear normal modes are computed using an eigenvalue approach for daily latitudinal profiles of zonal flow in the upper-tropospheric layer of 100?350 hPa before and after formation ... -
Latitudinal Variations of the Convective Source and Propagation Condition of Inertio-Gravity Waves in the Tropics
(American Meteorological Society, 2007)Latitudinal variations of the convective source and vertical propagation condition of inertio-gravity waves (IGWs) in the tropical region (30°S?30°N) are examined using high-resolution Global Cloud Imagery (GCI) and 6-hourly ... -
Coupling of Convective Momentum Transport with Convective Heating in Global Climate Simulations
(American Meteorological Society, 2007)The effects of convective momentum transport (CMT) on global climate simulations are examined in this study. Comparison between two sets of 20-yr (1979?98) integration using the NCAR Community Climate Model version 3 (CCM3) ... -
Turbulent Fluxes in the Hurricane Boundary Layer. Part II: Latent Heat Flux
(American Meteorological Society, 2007)As part of the recent ONR-sponsored Coupled Boundary Layer Air?Sea Transfer (CBLAST) Departmental Research Initiative, an aircraft was instrumented to carry out direct turbulent flux measurements in the high wind boundary ... -
A Combined Eddy-Diffusivity Mass-Flux Approach for the Convective Boundary Layer
(American Meteorological Society, 2007)A better conceptual understanding and more realistic parameterizations of convective boundary layers in climate and weather prediction models have been major challenges in meteorological research. In particular, parameterizations ... -
Turbulent Fluxes in the Hurricane Boundary Layer. Part I: Momentum Flux
(American Meteorological Society, 2007)An important outcome from the ONR-sponsored Coupled Boundary Layer Air?Sea Transfer (CBLAST) Hurricane Program is the first-ever direct measurements of momentum flux from within hurricane boundary layers. In 2003, a specially ... -
Assessing Predictability with a Local Ensemble Kalman Filter
(American Meteorological Society, 2007)In this paper, the spatiotemporally changing nature of predictability is studied in a reduced-resolution version of the National Centers for Environmental Prediction (NCEP) Global Forecast System (GFS), a state-of-the-art ... -
The Relation between Baroclinic Adjustment and Turbulent Diffusion in the Two-Layer Model
(American Meteorological Society, 2007)Baroclinic adjustment and turbulent diffusion are two popular paradigms used to describe the eddy?mean flow closure in the two-layer model, with very different implications for the criticality of the system. Baroclinic ... -
Vertical-Mode and Cloud Decomposition of Large-Scale Convectively Coupled Gravity Waves in a Two-Dimensional Cloud-Resolving Model
(American Meteorological Society, 2007)This paper describes an analysis of large-scale [O(1000 km)] convectively coupled gravity waves simulated using a two-dimensional cloud-resolving model. The waves develop spontaneously under uniform radiative cooling and ... -
The Influence of the Solar Cycle and QBO on the Late-Winter Stratospheric Polar Vortex
(American Meteorological Society, 2007)A statistical analysis of 51 years of NCEP?NCAR reanalysis data is conducted to isolate the separate effects of the 11-yr solar cycle (SC) and the equatorial quasi-biennial oscillation (QBO) on the Northern Hemisphere (NH) ... -
Vortex Street Dynamics: The Selection Mechanism for the Areas and Locations of Jupiter’s Vortices
(American Meteorological Society, 2007)With the exception of the Great Red Spot, Jupiter?s long-lived vortices are not isolated, but occur in east?west rows. Each row is centered about a westward-going jet stream with anticyclones on the poleward side and ... -
Improving Simulations of Convective Systems from TRMM LBA: Easterly and Westerly Regimes
(American Meteorological Society, 2007)The 3D Goddard Cumulus Ensemble model is used to simulate two convective events observed during the Tropical Rainfall Measuring Mission Large-Scale Biosphere?Atmosphere (TRMM LBA) experiment in Brazil. These two events ... -
New Multiscale Models and Self-Similarity in Tropical Convection
(American Meteorological Society, 2007)One of the unexplained striking features of tropical convection is the observed statistical self-similarity in clusters, superclusters, and intraseasonal oscillations through complex multiscale processes ranging from the ... -
Virtualization
(American Meteorological Society, 2007)The virtual temperature of a moist air parcel is defined as the temperature of a dry air parcel having the same mass, volume, and pressure. It is shown here that a virtual air parcel can be formed diabatically by warming ... -
Physically Retrieving Cloud and Thermodynamic Parameters from Ultraspectral IR Measurements
(American Meteorological Society, 2007)A physical inversion scheme has been developed dealing with cloudy as well as cloud-free radiance observed with ultraspectral infrared sounders to simultaneously retrieve surface, atmospheric thermodynamic, and cloud ... -
Evaporation and Condensation of Large Droplets in the Presence of Inert Admixtures Containing Soluble Gas
(American Meteorological Society, 2007)In this study the mutual influence of heat and mass transfer during gas absorption and evaporation or condensation on the surface of a stagnant droplet in the presence of inert admixtures containing noncondensable soluble ...