Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3941-3960 of 13215
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The Mesoscale Dynamics of Thin Tropical Tropopause Cirrus
(American Meteorological Society, 2009)Thin cirrus clouds in the tropical tropopause layer (TTL) are warmed through the absorption of infrared radiation. The response of the cloud and the surrounding atmosphere to this thermal forcing is investigated through ... -
A Density Current Parameterization Coupled with Emanuel’s Convection Scheme. Part II: 1D Simulations
(American Meteorological Society, 2009)The density current parameterization coupled with Emanuel?s convection scheme, described in Part I of this series of papers, is tested in a single-column framework for continental and maritime convective systems. The case ... -
A Theoretical Framework for Energy and Momentum Consistency in Subgrid-Scale Parameterization for Climate Models
(American Meteorological Society, 2009)A theoretical framework for the joint conservation of energy and momentum in the parameterization of subgrid-scale processes in climate models is presented. The framework couples a hydrostatic resolved (planetary scale) ... -
Stochastic Subgrid Parameterizations for Simulations of Atmospheric Baroclinic Flows
(American Meteorological Society, 2009)A stochastic subgrid modeling method is used to parameterize horizontal and vertical subgrid-scale transfers in large-eddy simulations (LESs) of baroclinic flows with large-scale jets and energy spectra typical of the ... -
Ocean Heat Transport, Sea Ice, and Multiple Climate States: Insights from Energy Balance Models
(American Meteorological Society, 2009)Several extensions of energy balance models (EBMs) are explored in which (i) sea ice acts to insulate the atmosphere from the ocean and (ii) ocean heat transport is allowed to have some meridional structure controlled by ... -
Optical and Physical Properties of Atmospheric Aerosols over the Bay of Bengal during ICARB
(American Meteorological Society, 2009)Simultaneous and collocated measurements of total and hemispherical backscattering coefficients (σ and ?, respectively) at three wavelengths, mass size distributions, and columnar spectral aerosol optical depth (AOD) were ... -
Evaluation of an Analytical Model for the Maximum Intensity of Tropical Cyclones
(American Meteorological Society, 2009)Several studies have shown that the intensity of numerically simulated tropical cyclones can exceed (by 50%) a theoretical upper limit. To investigate the cause, this study evaluates the underlying components of Emanuel?s ... -
A Density Current Parameterization Coupled with Emanuel’s Convection Scheme. Part I: The Models
(American Meteorological Society, 2009)The aim of the present series of papers is to develop a density current parameterization for global circulation models. This first paper is devoted to the presentation of this new wake parameterization coupled with Emanuel?s ... -
The Dynamics of Eye Formation and Maintenance in Axisymmetric Diabatic Vortices
(American Meteorological Society, 2009)This paper investigates the occurrence, formation, and maintenance of eyes in idealized axisymmetric balanced vortices with diabatic forcing. Two key elements of the model setup are temperature relaxation toward a specified ... -
Impacts of Evaporation from Raindrops on Tropical Cyclones. Part I: Evolution and Axisymmetric Structure
(American Meteorological Society, 2010)Cloud-resolving simulations of an ideal tropical cyclone (TC) on an f plane are performed to investigate the effects of evaporative cooling on the evolution and structure of a TC. Evaporative cooling has markedly different ... -
A Note on Modeling Mixing in Stably Stratified Flows
(American Meteorological Society, 2009)In a recent paper, Canuto et al. made a crucial contribution to modeling mixing in stably stratified flows by discovering that a modification to one of the closure constants can push the critical gradient Richardson number ... -
Aerosol Remote Sensing over Clouds Using A-Train Observations
(American Meteorological Society, 2009)The detection of aerosol above clouds is critical for the estimate of both the aerosol and cloud radiative impacts. In this study, the authors present a new method to retrieve the aerosol properties over clouds that uses ... -
Comments on “Application of the Lighthill–Ford Theory of Spontaneous Imbalance to Clear-Air Turbulence Forecasting”
(American Meteorological Society, 2009) -
Initial-Condition Sensitivities and the Predictability of Downslope Winds
(American Meteorological Society, 2009)The sensitivity of downslope wind forecasts to small changes in initial conditions is explored by using 70-member ensemble simulations of two prototypical windstorms observed during the Terrain-Induced Rotor Experiment ... -
Structure of the Madden–Julian Oscillation in the Superparameterized CAM
(American Meteorological Society, 2009)The detailed dynamic and thermodynamic space?time structures of the Madden?Julian oscillation (MJO) as simulated by the superparameterized Community Atmosphere Model version 3.0 (SP-CAM) are analyzed. Superparameterization ... -
Fidelity of Analytic Drop Size Distributions in Drizzling Stratiform Clouds Based on Large-Eddy Simulations
(American Meteorological Society, 2009)Cloud microphysical parameterizations and retrievals rely heavily on knowledge of the shape of drop size distributions (DSDs). Many investigations assume that DSDs in the entire or partial drop size range may be approximated ... -
Arctic Mixed-Phase Stratiform Cloud Properties from Multiple Years of Surface-Based Measurements at Two High-Latitude Locations
(American Meteorological Society, 2009)Macro- and microphysical properties of single-layer stratiform mixed-phase clouds are derived from multiple years of lidar, radar, and radiosonde observations. Measurements were made as part of the Mixed-Phase Arctic Clouds ... -
Wave-Induced Wind in the Marine Boundary Layer
(American Meteorological Society, 2009)Recent field observations and large-eddy simulations have shown that the impact of fast swell on the marine atmospheric boundary layer (MABL) might be stronger than previously assumed. For low to moderate winds blowing in ... -
Modeling Mesoscale Cellular Structures and Drizzle in Marine Stratocumulus. Part I: Impact of Drizzle on the Formation and Evolution of Open Cells
(American Meteorological Society, 2009)A new modeling framework is used to investigate aerosol?cloud?precipitation interactions and dynamical feedbacks at the mesoscale. The focus is on simulation of the formation and evolution of cellular structures that are ... -
On How Hot Towers Fuel the Hadley Cell: An Observational and Modeling Study of Line-Organized Convection in the Equatorial Trough from TOGA COARE
(American Meteorological Society, 2009)An airflow trajectory analysis was carried out based on an idealized numerical simulation of the nocturnal 9 February 1993 equatorial oceanic squall line observed over the Tropical Ocean and Global Atmosphere Coupled ...