Journal of the Atmospheric Sciences: Recent submissions
Now showing items 881-900 of 13215
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A Unified Eddy-Diffusivity/Mass-Flux Approach for Modeling Atmospheric Convection
(American Meteorological Society, 2019)AbstractA fully unified parameterization of boundary layer and moist convection (shallow and deep) is presented. The new parameterization is based on the stochastic multiplume eddy-diffusivity/mass-flux (EDMF) approach, ... -
An Evaluation of Hurricane Superintensity in Axisymmetric Numerical Models
(American Meteorological Society, 2019)AbstractPotential intensity (PI) is an analytical bound on steady, inviscid, axisymmetric hurricane wind speed. Studies have shown that simulated hurricane azimuthal wind speed can greatly exceed a PI bound on the maximum ... -
Updraft Constraints on Entrainment: Insights from Amazonian Deep Convection
(American Meteorological Society, 2019)AbstractMixing of environmental air into clouds, or entrainment, has been identified as a major contributor to erroneous climate predictions made by modern comprehensive climate and numerical weather prediction models. ... -
Parameter Sweep Experiments on a Spectrum of Cyclones with Diabatic and Baroclinic Processes
(American Meteorological Society, 2019)AbstractA wide range of environments that prevail over the globe generate various types of cyclones such as tropical, extratropical, and hybrid cyclones. In this paper, idealized numerical experiments are used to explore ... -
On Relationships between Nonrecurving Western North Pacific Tropical Cyclones, the Madden–Julian Oscillation, and the East Asian Subtropical Jet
(American Meteorological Society, 2019)AbstractA 200-hPa zonal momentum budget is performed to examine the role that western North Pacific tropical cyclones (TCs) play in helping to organize intraseasonal extratropical circulation anomalies that occur with the ... -
A Moist Conceptual Model for the Boundary Layer Structure and Radiatively Driven Shallow Circulations in the Trades
(American Meteorological Society, 2019)AbstractA conceptual model is developed to analyze how radiative cooling and the effect of moisture and shallow convection modify the boundary layer (BL) structure and the strength of mesoscale shallow circulations. The ... -
The Thermodynamic Cycles and Associated Energetics of Hurricane Edouard (2014) during Its Intensification
(American Meteorological Society, 2019)AbstractThis study expands on a previous analysis of the intensification of Hurricane Edouard (2014) in the isentropic coordinates to further examine the thermodynamic processes that lead to the strengthening of the storm. ... -
Predictability of Idealized Thunderstorms in Buoyancy–Shear Space
(American Meteorological Society, 2019)AbstractThunderstorms are difficult to predict because of their small length scale and fast predictability destruction. A cell?s predictability is constrained by properties of the flow in which it is embedded (e.g., vertical ... -
The Influence of Lifting Condensation Level on Low-Level Outflow and Rotation in Simulated Supercell Thunderstorms
(American Meteorological Society, 2019)AbstractThis paper reports on results of idealized numerical simulations testing the influence of low-level humidity, and thus lifting condensation level (LCL), on the morphology and evolution of low-level rotation in ... -
Processes and Timescales in Onset and Withdrawal of “Aquaplanet Monsoons”
(American Meteorological Society, 2019)AbstractAquaplanets with low-heat-capacity slab-ocean boundary conditions can exhibit rapid changes in the regime of the overturning circulation over the seasonal cycle, which have been connected to the onset of Earth?s ... -
Solutions to the 3D Transport Equation and 1D Diffusion Equation for Passive Tracers in the Atmospheric Boundary Layer and Their Applications
(American Meteorological Society, 2019)AbstractA solution to the 3D transport equation for passive tracers in the atmospheric boundary layer (ABL), formulated in terms of Green?s function (GF), is derived to show the connection between the concentration and ... -
The Outflow–Rainband Relationship Induced by Environmental Flow around Tropical Cyclones
(American Meteorological Society, 2019)AbstractThis study investigates the role of the asymmetric interaction between the tropical cyclone (TC) and the environmental flow in governing the TC inner-core asymmetric structure. Motivated by the limitations of bulk ... -
The Effects of a Well-Resolved Stratosphere on the Simulated Boreal Winter Circulation in a Climate Model
(American Meteorological Society, 2019)AbstractThe impact of stratospheric representation is investigated using the Model for Interdisciplinary Research on Climate Atmospheric General Circulation Model (MIROC-AGCM) run with different model-lid heights and ... -
Response of Surface Wind Divergence to Mesoscale SST Anomalies under Different Wind Conditions
(American Meteorological Society, 2019)AbstractThe response of the atmospheric boundary layer to mesoscale sea surface temperature (SST) is often characterized by a link between wind stress divergence and downwind SST gradients. In this study, an idealized ... -
Modal Decomposition of the Global Response to Tropical Heating Perturbations Resembling MJO
(American Meteorological Society, 2019)AbstractThe paper presents four ensembles of numerical experiments that compare the response to monopole and dipole heating perturbations resembling different phases of the Madden?Julian oscillation (MJO). The results ... -
A Reduced-Order Representation of the Madden–Julian Oscillation Based on Reanalyzed Normal Mode Coherences
(American Meteorological Society, 2019)AbstractThe Madden?Julian oscillation (MJO) is presented as a series of interacting Rossby and inertial gravity waves of varying vertical scales and meridional extents. These components are isolated by decomposing reanalysis ... -
Power-Law Scaling in the Internal Variability of Cumulus Cloud Size Distributions due to Subsampling and Spatial Organization
(American Meteorological Society, 2019)AbstractIn this study, the spatial structure of cumulus cloud populations is investigated using three-dimensional snapshots from large-domain LES experiments. The aim is to understand and quantify the internal variability ... -
Barotropic Instability across the Moat and Inner Eyewall Dissipation: A Numerical Study of Hurricane Wilma (2005)
(American Meteorological Society, 2019)AbstractRadar imagery of some double-eyewall tropical cyclones shows that the inner eyewalls become elliptical prior to their dissipation. These elliptical features indicate that the barotropic instability (BI) across the ... -
A Simple Model of a Balanced Boundary Layer Coupled to a Large-Scale Convective Circulation
(American Meteorological Society, 2019)AbstractMany simple models of large-scale tropical circulations do not include a frictional boundary layer. A simple model is presented where the convective circulation is coupled to the boundary layer convergence. In the ... -
The Ice Particle and Aggregate Simulator (IPAS). Part I: Extracting Dimensional Properties of Ice–Ice Aggregates for Microphysical Parameterization
(American Meteorological Society, 2019)AbstractAggregation, the process by which two or more ice particles attach to each other, is typically observed in clouds that span a range of temperatures and is influenced by the crystal shape (habit). In this study, the ...