Journal of the Atmospheric Sciences: Recent submissions
Now showing items 4481-4500 of 13215
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Study of Ice Crystal Orientation in Cirrus Clouds Based on Satellite Polarized Radiance Measurements
(American Meteorological Society, 2004)The goal of this paper is to retrieve information about ice particle orientation in cirrus clouds. This is achieved by comparing simulations of sunlight reflection on a cirrus cloud with measurements of polarized radiances ... -
Testing Mixed-Phase Cloud Water Vapor Parameterizations with SHEBA/FIRE–ACE Observations
(American Meteorological Society, 2004)The parameterization of in-cloud water vapor pressure below 0°C is examined using in situ aircraft observations from Canadian National Research Council (NRC) Convair-580 flights during the Surface Heat Budget of the Arctic ... -
Effect of Vertical Dipole Temperature Anomalies on Convection in a Cloud Model
(American Meteorological Society, 2004)A cloud-resolving model is used to study the effects of a vertical temperature dipole on convective cloud development. Such dipole anomalies, with a warm-above-cool structure in the troposphere, are known to be forced by ... -
Weak Atlantic–Pacific Teleconnections as Synchronized Chaos
(American Meteorological Society, 2004)The relationship between blocking events in the Atlantic and Pacific sectors of the Northern Hemisphere midlatitudes is investigated in a Vautard?Legras two-layer quasigeostrophic channel model with two sectors, each sector ... -
A Climatology of Waves in the Equatorial Region
(American Meteorological Society, 2004)Propagating anomalies of moisture and moist deep convection in the Tropics are organized into a variety of large-scale modes. These include (but are not limited to) the so-called intraseasonal oscillations, convectively ... -
Comments on “The Roles of the Horizontal Component of the Earth's Angular Velocity in Nonhydrostatic Linear Models”
(American Meteorological Society, 2004) -
Heterogeneous Drop Freezing in the Immersion Mode: Model Calculations Considering Soluble and Insoluble Particles in the Drops
(American Meteorological Society, 2004)A method is presented to consider the influence of both soluble and insoluble aerosol particles on drop freezing in the immersion mode in cloud models. Most atmospheric aerosol particles contain soluble and insoluble ... -
Reply
(American Meteorological Society, 2004) -
Radiation Budget of the Tropical Intraseasonal Oscillation
(American Meteorological Society, 2004)This study examines the relationship between precipitation and radiative heating on intraseasonal time scales in the Tropics using collocated top-of-atmosphere (TOA) and surface radiative flux measurements from special ... -
The Variability of Modeled Tropical Precipitation
(American Meteorological Society, 2004)This paper investigates the temporal properties of tropical precipitation in the Canadian Centre for Climate Modelling and Analysis (CCCma) third-generation atmospheric general circulation model (AGCM3). AGCM3 employs the ... -
A Simple Model for the Skewness of Global Sea Surface Winds
(American Meteorological Society, 2004)A strong linear relationship between the mean and skewness of global sea surface winds (both zonal and meridional) is shown to exist, such that where the wind component is on average positive, it is negatively skewed (and ... -
Enhanced and Oriented Riming of Growing Ice Crystals
(American Meteorological Society, 2004)Geometrically oriented riming was found in Formvar resin replicas of columnar ice crystals collected in cumulus clouds at ?6°C during an aircraft field program in Texas. Rimed cloud droplets were found either on the ends ... -
Poisson-Bracket Approach to the Construction of Energy- and Potential-Enstrophy-Conserving Algorithms for the Shallow-Water Equations
(American Meteorological Society, 2004)Arakawa and Lamb discovered a finite-difference approximation to the shallow-water equations that exactly conserves finite-difference approximations to the energy and potential enstrophy of the fluid. The Arakawa? Lamb ... -
The Lateral Transport of Zonal Momentum Due to Kelvin Waves in a Meridional Circulation
(American Meteorological Society, 2004)A modified, equatorial Kelvin wave solution is obtained in the presence of the zonal-mean meridional circulation. The modified Kelvin wave solution, which is obtained via a perturbation expansion of the linearized, primitive ... -
An Improved Framework for Superparameterization
(American Meteorological Society, 2004)This paper discusses a large-scale modeling system with explicit representation of small-scale and mesoscale processes provided by a cloud-resolving model embedded in each column of a large-scale model, the superparameterization. ... -
Collisions of Small Drops in a Turbulent Flow. Part II: Effects of Flow Accelerations
(American Meteorological Society, 2004)The effects of Lagrangian acceleration on collision efficiency and collision kernels of small cloud droplets in a turbulent flow are investigated using the results of the recent laboratory experiments by La Porta et al., ... -
The “RED versus NIR” Plane to Retrieve Broken-Cloud Optical Depth from Ground-Based Measurements
(American Meteorological Society, 2004)A new method for retrieving cloud optical depth from ground-based measurements of zenith radiance in the red (RED) and near-infrared (NIR) spectral regions is introduced. Because zenith radiance does not have a one-to-one ... -
Tropical Cyclone Intensity in Vertical Wind Shear
(American Meteorological Society, 2004)The structure and intensity changes of tropical cyclones (TCs) in environmental vertical wind shear (VWS) are investigated in this study using the fifth-generation Pennsylvania State University?National Center for Atmospheric ... -
Global Warming of the Atmosphere in Radiative–Convective Equilibrium
(American Meteorological Society, 2004)Many studies of global warming have commonly reported positive warming feedback by water vapor, exhibiting relative humidity in the atmosphere unchanged for different warming conditions. However, this is not self-evident, ... -
Assimilation of Equatorial Waves by Line-of-Sight Wind Observations
(American Meteorological Society, 2004)This paper investigates the potential of line-of-sight (LOS) wind information from a spaceborne Doppler wind lidar to reduce uncertainties in the analysis fields of equatorial waves. The benefit of LOS winds is assessed ...