Journal of the Atmospheric Sciences: Recent submissions
Now showing items 921-940 of 13215
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Identifying the Sources of Convective Memory in Cloud-Resolving Simulations
(American Meteorological Society, 2018)AbstractConvection is often assumed to be controlled by the simultaneous environmental fields. But to what extent does it also remember its past behavior? This study proposes a new framework in which the memory of previous ... -
Comparison of Modeled and Measured Ice Nucleating Particle Composition in a Cirrus Cloud
(American Meteorological Society, 2019)AbstractThe contribution of heterogeneous ice nucleation to the formation of cirrus cloud ice crystals is still not well quantified. This results in large uncertainties when predicting cirrus radiative effects and their ... -
Inferences from Simple Models of Slow, Convectively Coupled Processes
(American Meteorological Society, 2018)A framework for conceptual understanding of slow, convectively coupled disturbances is developed and applied to several canonical tropical problems, including the water vapor content of an atmosphere in radiative?convective ... -
On the Factors Controlling the Development of Shallow Convection in Eddy-Diffusivity/Mass-Flux Models
(American Meteorological Society, 2018)This study addresses key aspects of shallow moist convection, as simulated by a multiplume eddy-diffusivity/mass-flux (EDMF) model. Two factors suggested in the literature to be essential for the development of convective ... -
CORRIGENDUM
(American Meteorological Society, 2019) -
Impact of the Diurnal Radiation Contrast on the Contraction of Radius of Maximum Wind during Intensification of Hurricane Edouard (2014)
(American Meteorological Society, 2018)This work examines the impacts of the diurnal radiation contrast on the contraction rate of the radius of maximum wind (RMW) during intensification of Hurricane Edouard (2014) through convection-permitting simulations. ... -
The Influence of Vertical Wind Shear on the Evolution of Mountain-Wave Momentum Flux
(American Meteorological Society, 2019)The influence of vertical shear on the evolution of mountain-wave momentum fluxes in time-varying cross-mountain flows is investigated by numerical simulation and analyzed using ray tracing and the WKB approximation. The ... -
Why Does Deep Convection Have Different Sensitivities to Temperature Perturbations in the Lower versus Upper Troposphere?
(American Meteorological Society, 2018)Previous studies have documented that deep convection responds more strongly to above-the-cloud-base temperature perturbations in the lower troposphere than to those in the upper troposphere, a behavior that is important ... -
Inhomogeneous Mixing in Lagrangian Cloud Models: Effects on the Production of Precipitation Embryos
(American Meteorological Society, 2018)Although small-scale turbulent mixing at cloud edge has substantial effects on the microphysics of clouds, most models do not represent these processes explicitly, or parameterize them rather crudely. This study presents ... -
Estimation of the Variability of Mesoscale Energy Spectra with Three Years of COSMO-DE Analyses
(American Meteorological Society, 2018)Research on the mesoscale kinetic energy spectrum over the past few decades has focused on finding a dynamical mechanism that gives rise to a universal spectral slope. Here we investigate the variability of the spectrum ... -
Estimating the Intrinsic Limit of Predictability Using a Stochastic Convection Scheme
(American Meteorological Society, 2018)Global model simulations together with a stochastic convection scheme are used to assess the intrinsic limit of predictability that originates from convection up to planetary scales. The stochastic convection scheme has ... -
Dynamics of Lower-Tropospheric Vorticity in Idealized Simulations of Tropical Cyclone Formation
(American Meteorological Society, 2019)Idealized simulations are conducted using the Cloud Model version 1 (CM1) to explore the mechanism of tropical cyclone (TC) genesis from a preexisting midtropospheric vortex that forms in radiative?convective equilibrium. ... -
The Three Atmospheric Circulations over the Indian Ocean and the Maritime Continent and Their Modulation by the Passage of the MJO
(American Meteorological Society, 2018)The passage of the Madden?Julian oscillation (MJO) over the Indian Ocean and the Maritime Continent is investigated during the episode of 23?30 November 2011. A Meso-NH convection-permitting simulation with a horizontal ... -
Upscale Impact of Mesoscale Disturbances of Tropical Convection on 2-Day Waves
(American Meteorological Society, 2018)Westward-propagating 2-day waves with embedded mesoscale disturbances contribute a large portion of synoptic variability of tropical convection over the western Pacific. It is of crucial importance to assess the upscale ... -
Impacts of Radiation and Upper-Tropospheric Temperatures on Tropical Cyclone Structure and Intensity
(American Meteorological Society, 2018)Potential intensity theory predicts that the upper-tropospheric temperature acts as an important constraint on tropical cyclone (TC) intensity. The physical mechanisms through which the upper troposphere impacts TC intensity ... -
On the Momentum Budget of the Quasi-Biennial Oscillation in the Whole Atmosphere Community Climate Model
(American Meteorological Society, 2018)This study documents the contribution of equatorial waves and mesoscale gravity waves to the momentum budget of the quasi-biennial oscillation (QBO) in a 110-level version of the Whole Atmosphere Community Climate Model. ... -
Investigating the Diurnal Evolution of the Cloud Size Distribution of Continental Cumulus Convection Using Multiday LES
(American Meteorological Society, 2019)The diurnal dependence of cumulus cloud size distributions over land is investigated by means of an ensemble of large-eddy simulations (LESs). A total of 146 days of transient continental shallow cumulus are selected and ... -
A Statistical Analysis of Relationships between Western North Pacific Tropical Cyclones and Extratropical Circulation Patterns Accompanying the Madden–Julian Oscillation
(American Meteorological Society, 2018)Relationships between the Madden?Julian oscillation (MJO) and the extratropical circulation have been studied extensively and applied in operational settings to improve subseasonal prediction. However, in certain situations, ... -
A General Description of Entrainment in Buoyant Cloudy Plumes Including the Effects of Mixing-Induced Evaporation
(American Meteorological Society, 2018)In this work, the steady-state one-dimensional axisymmetric plume theory is revisited and generalized to include the effects of nonhomogeneous updraft velocity and buoyancy profiles across the plume, environmental shear, ... -
Extratropical Influence on 200-hPa Easterly Acceleration over the Western Indian Ocean Preceding Madden–Julian Oscillation Convective Onset
(American Meteorological Society, 2018)The onset of Madden?Julian oscillation (MJO) deep convection often occurs over the western Indian Ocean and has upper-tropospheric circulation precursors that consist of eastward-circumnavigating tropical easterlies and ...