Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1781-1800 of 13215
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Mass-Flux Characteristics of Tropical Cumulus Clouds from Wind Profiler Observations at Darwin, Australia
(American Meteorological Society, 2015)umulus parameterizations in weather and climate models frequently apply mass-flux schemes in their description of tropical convection. Mass flux constitutes the product of the fractional area covered by convection in a ... -
Revisiting the Relationship between Eyewall Contraction and Intensification
(American Meteorological Society, 2015)n the widely accepted convective ring model of tropical cyclone intensification, the intensification of the maximum winds and the contraction of the radius of maximum winds (RMW) occur simultaneously. This study shows that ... -
The Role of Wave Dynamics and Small-Scale Topography for Downslope Wind Events in Southeast Greenland
(American Meteorological Society, 2015)n Ammassalik, in southeast Greenland, downslope winds can reach hurricane intensity and represent a hazard for the local population and environment. They advect cold air down the ice sheet and over the Irminger Sea, where ... -
Precursor Environmental Conditions Associated with the Termination of Madden–Julian Oscillation Events
(American Meteorological Society, 2015)his study presents an analysis of the precursor environmental conditions related to the termination of Madden?Julian oscillation (MJO) events. A simple climatology is created using a real-time MJO monitoring index, documenting ... -
Atmospheric Wake of Madeira: First Aerial Observations and Numerical Simulations
(American Meteorological Society, 2015)he island of Madeira is well known for giving rise to atmospheric wakes. Strong and unsteady atmospheric wakes, resembling a von Kármán vortex street, are frequently observed in satellite images leeward of Madeira, especially ... -
Does the ECMWF IFS Convection Parameterization with Stochastic Physics Correctly Reproduce Relationships between Convection and the Large-Scale State?
(American Meteorological Society, 2014)mportant questions concerning parameterization of tropical convection are how should subgrid-scale variability be represented and which large-scale variables should be used in the parameterizations? Here the statistics of ... -
Effect of Surface Fluxes versus Radiative Heating on Tropical Deep Convection
(American Meteorological Society, 2015)he effects of turbulent surface fluxes and radiative heating on tropical deep convection are compared in a series of idealized cloud-system-resolving simulations with parameterized large-scale dynamics. Two methods of ... -
Numerical Study on the Extremely Rapid Intensification of an Intense Tropical Cyclone: Typhoon Ida (1958)
(American Meteorological Society, 2015)xtremely rapid intensification (ERI) of Typhoon Ida (1958) was examined with a 2-km-mesh nonhydrostatic model initiated at three different times. Ida was an extremely intense tropical cyclone with a minimum central pressure ... -
Column-Integrated Moist Static Energy Budget Analysis on Various Time Scales during TOGA COARE
(American Meteorological Society, 2015)oist static energy (MSE) budgets on different time scales are analyzed in the TOGA COARE data using Lanczos filters to separate variability with different frequencies. Four different time scales (~2-day, ~5-day, ~10-day, ... -
Comments on “A Unified Representation of Deep Moist Convection in Numerical Modeling of the Atmosphere. Part I”
(American Meteorological Society, 2015) -
Stochastic and Perturbed Parameter Representations of Model Uncertainty in Convection Parameterization
(American Meteorological Society, 2015)t is now acknowledged that representing model uncertainty in atmospheric simulators is essential for the production of reliable probabilistic forecasts, and a number of different techniques have been proposed for this ... -
Idealized Large-Eddy Simulations of a Tropical Cyclone–like Boundary Layer
(American Meteorological Society, 2015)he tropical cyclone (TC) boundary layer (TCBL)?featuring extreme winds over a rough ocean?is difficult to study observationally. With increasing computational power, high-resolution large-eddy simulation (LES) has become ... -
A Low Mach Number Model for Moist Atmospheric Flows
(American Meteorological Society, 2015)low Mach number model for moist atmospheric flows is introduced that accurately incorporates reversible moist processes in flows whose features of interest occur on advective rather than acoustic time scales. Total water ... -
The Dissipation of Trapped Lee Waves. Part I: Leakage of Inviscid Waves into the Stratosphere
(American Meteorological Society, 2014)eaky trapped mountain lee waves are investigated by examining the structure of individual linear modes in multilayer atmospheres. When the static stability and cross-mountain wind speed are constant in the topmost unbounded ... -
Why Eddy Momentum Fluxes are Concentrated in the Upper Troposphere
(American Meteorological Society, 2014)he extratropical eddy momentum flux (EMF) is controlled by generation, propagation, and dissipation of large-scale eddies and is concentrated in Earth?s upper troposphere. An idealized GCM is used to investigate how this ... -
Interhemispheric Propagation of Stationary Rossby Waves in a Horizontally Nonuniform Background Flow
(American Meteorological Society, 2015)ignificant interhemispheric teleconnections are identified that span the tropical easterlies in the boreal summer 300-hPa streamfunction, such as the North Africa?Antarctic (NAA) and the North Pacific?South America (NPSA) ... -
A Shear-Based Parameterization of Turbulent Mixing in the Stable Atmospheric Boundary Layer
(American Meteorological Society, 2015)n this study, shear-based parameterizations of turbulent mixing in the stable atmospheric boundary layer (SABL) are proposed. A relevant length-scale estimate for the mixing length of the turbulent momentum field is ... -
Trajectory Analysis of the Mechanism for Westward Propagation of Rossby Waves
(American Meteorological Society, 2015)n analysis of Rossby wave dynamics in two and three dimensions is carried from the point of view of a reference frame propagating with the zonal phase speed of the wave. Since trajectories and streamlines coincide in this ... -
The Influence of the Spectral Truncation on the Simulation of Waves in the Tropical Stratosphere
(American Meteorological Society, 2015)onvectively triggered waves are the main driver of the tropical stratospheric circulation. In atmospheric models, the model?s resolution limits the length of the simulated wave spectrum. In this study, the authors compare ... -
Corrigendum
(American Meteorological Society, 2014)