Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3781-3800 of 13215
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Characteristics of Baroclinic Wave Packets during Strong and Weak Stratospheric Polar Vortex Events
(American Meteorological Society, 2010)This study tested a numerical and theoretical prediction that the stratosphere and troposphere are coupled through the effect of stratospheric vertical wind shear on baroclinic waves. Wavelengths, phase speeds, and background ... -
Droplet Growth in Warm Water Clouds Observed by the A-Train. Part II: A Multisensor View
(American Meteorological Society, 2010)Hydrometeor droplet growth processes are inferred from a combination of Aqua/Moderate Resolution Imaging Spectroradiometer (MODIS) cloud particle size observations and CloudSat/Cloud Profiling Radar (CPR) observations of ... -
On the Identification of Nonstationary Factor Models and Their Application to Atmospheric Data Analysis
(American Meteorological Society, 2010)A numerical framework for data-based identification of nonstationary linear factor models is presented. The approach is based on the extension of the recently developed method for identification of persistent dynamical ... -
Validation of a Tropical Cyclone Steering Response Function with a Barotropic Adjoint Model
(American Meteorological Society, 2010)The steering of a tropical cyclone (TC) vortex is commonly understood as the advection of the TC vortex by an ?environmental wind.? In past studies, the environmental steering wind vector has been defined by the horizontal ... -
Rainfall Reinforcement Associated with Landfalling Tropical Cyclones
(American Meteorological Society, 2010)Landfalling tropical cyclones (TCs) often bring about heavy rainfall, which typically decreases with the weakening of the TCs. However, some TCs may suddenly be reinvigorated after they become remnants over land. Such TCs ... -
The Mutual Interaction between External Rossby Waves and Thermal Forcing: The Subpolar Regions
(American Meteorological Society, 2010)The authors hypothesize a simple feedback mechanism between external Rossby waves and diabatic heating from convection. This mechanism could explain the large amplitude that external Rossby waves attain as they propagate ... -
Modulation of Internal Gravity Waves in a Multiscale Model for Deep Convection on Mesoscales
(American Meteorological Society, 2010)Starting from the conservation laws for mass, momentum, and energy together with a three-species bulk microphysics model, a model for the interaction of internal gravity waves and deep convective hot towers is derived using ... -
Ice Initiation by Aerosol Particles: Measured and Predicted Ice Nuclei Concentrations versus Measured Ice Crystal Concentrations in an Orographic Wave Cloud
(American Meteorological Society, 2010)The initiation of ice in an isolated orographic wave cloud was compared with expectations based on ice nucleating aerosol concentrations and with predictions from new ice nucleation parameterizations applied in a cloud ... -
An Improved Representation of Rimed Snow and Conversion to Graupel in a Multicomponent Bin Microphysics Scheme
(American Meteorological Society, 2010)This paper describes the development of a new multicomponent detailed bin ice microphysics scheme that predicts the number concentration of ice as well as the rime mass mixing ratio in each mass bin. This allows for local ... -
The Role of the Middle Atmosphere in Simulations of the Troposphere during Northern Hemisphere Winter: Differences between High- and Low-Top Models
(American Meteorological Society, 2010)This paper compares present-day simulations made with two state-of-the-art climate models: a conventional model specifically designed to represent the tropospheric climate, which has a poorly resolved middle atmosphere, ... -
Building Blocks of Tropical Diabatic Heating
(American Meteorological Society, 2010)Rotated EOF analyses are used to study the composition and variability of large-scale tropical diabatic heating profiles estimated from eight field campaigns. The results show that the profiles are composed of a pair of ... -
Factors Affecting the Predictability of Hurricane Humberto (2007)
(American Meteorological Society, 2010)This study uses ensemble Kalman filter analyses and short-range ensemble forecasts to study factors affecting the predictability of Hurricane Humberto, which made landfall along the Texas coast in 2007. Humberto is known ... -
Failed Cyclogenetic Evolution of a West African Monsoon Perturbation Observed during AMMA SOP-3
(American Meteorological Society, 2010)The so-called ?perturbation D? was a nondeveloping West African disturbance observed near Dakar (Senegal) during special observing period (SOP) 3 of the African Monsoon Multidisciplinary Analysis (AMMA) in September 2006. ... -
Genesis of Tropical Storm Eugene (2005) from Merging Vortices Associated with ITCZ Breakdowns. Part III: Sensitivity to Various Genesis Parameters
(American Meteorological Society, 2010)In this study, a series of sensitivity simulations is performed to examine the processes leading to the genesis of Tropical Storm Eugene (2005) from merging vortices associated with the breakdowns of the intertropical ... -
Lagrangian Coherent Structures near a Subtropical Jet Stream
(American Meteorological Society, 2010)Direct Lyapunov exponents and stability results are used to extract and distinguish Lagrangian coherent structures (LCS) from a three-dimensional atmospheric dataset generated from the Weather Research and Forecasting (WRF) ... -
The Full-Spectrum Correlated-k Method for Longwave Atmospheric Radiative Transfer Using an Effective Planck Function
(American Meteorological Society, 2010)The correlated-k-distribution (CKD) method is widely used in the radiative transfer schemes of atmospheric models; it involves dividing the spectrum into a number of bands and then reordering the gaseous absorption ... -
Turbulence Characteristics in an Elevated Shear Layer over Owens Valley
(American Meteorological Society, 2010)Characteristics of turbulence in the lower and middle troposphere over Owens Valley have been examined using aircraft in situ measurements obtained from the Terrain-Induced Rotor Experiment. The two events analyzed in this ... -
Can CAPE Maintain Polar Lows?
(American Meteorological Society, 2010)A unique dataset of atmospheric observations over the Nordic Seas has been analyzed to investigate the role of convective available potential energy (CAPE) for the energetics of polar lows. The observations were made during ... -
The Dynamic Response of the Hurricane Wind Field to Spiral Rainband Heating
(American Meteorological Society, 2010)The response of the hurricane wind field to spiral rainband heating is examined by using a three-dimensional, nonhydrostatic, linear model of the vortex?anelastic equations. Diabatic heat sources, which are designed in ... -
Momentum Advection and the Gradient of a Vector Field: A Discussion of Standard Notation
(American Meteorological Society, 2009)The confusion and ambiguity in the literature regarding the notation (V · ?)V versus V · ?V is discussed, and the equivalence of the two expressions is demonstrated. The invariance of this notation in any coordinate system ...