Journal of the Atmospheric Sciences: Recent submissions
Now showing items 941-960 of 13215
-
On the Nonlinearity of Winter Northern Hemisphere Atmospheric Variability
(American Meteorological Society, 2018)Nonlinearity in the Northern Hemisphere?s wintertime atmospheric flow is investigated from both an intermediate-complexity model of the extratropics and reanalyses. A long simulation is obtained using a three-level ... -
Tropopause Evolution in a Rapidly Intensifying Tropical Cyclone: A Static Stability Budget Analysis in an Idealized Axisymmetric Framework
(American Meteorological Society, 2018)Upper-level static stability (N2) variations can influence the evolution of the transverse circulation and potential vorticity in intensifying tropical cyclones (TCs). This paper examines these variations during the rapid ... -
Verification of an Approximate Thermodynamic Equation with Application to Study on Arctic Stratospheric Temperature Changes
(American Meteorological Society, 2018)Temperature changes in the Arctic lower stratosphere on both short- and long-term time scales are critical for changing the magnitude of ozone losses in the Arctic vortex. In this paper, an approximate month-to-month ... -
Thermodynamic and Dynamic Mechanisms for Hydrological Cycle Intensification over the Full Probability Distribution of Precipitation Events
(American Meteorological Society, 2018)Precipitation changes in a warming climate have been examined with a focus on either mean precipitation or precipitation extremes, but changes in the full probability distribution of precipitation have not been well studied. ... -
Parameterization of Vertical Profiles of Governing Microphysical Parameters of Shallow Cumulus Cloud Ensembles Using LES with Bin Microphysics
(American Meteorological Society, 2018)Shallow convection is a subgrid process in cloud-resolving models for which their grid box is larger than the size of small cumulus clouds (Cu). At the same time such Cu substantially affect radiation properties and ... -
Effect of Upper- and Lower-Level Baroclinicity on the Persistence of the Leading Mode of Midlatitude Jet Variability
(American Meteorological Society, 2018)The sensitivity of the variability of an eddy-driven jet to the upper- and lower-level baroclinicity of the mean state is analyzed using a three-level quasigeostrophic model on the sphere. The model is forced by a relaxation ... -
The Impact of the QBO on MJO Convection in Cloud-Resolving Simulations
(American Meteorological Society, 2019)This study examines the relationship between the Madden?Julian oscillation (MJO) and the stratospheric quasi-biennial oscillation (QBO) in a limited-area cloud-resolving model with parameterized large-scale dynamics. The ... -
An Evaluation of Size-Resolved Cloud Microphysics Scheme Numerics for Use with Radar Observations. Part I: Collision–Coalescence
(American Meteorological Society, 2018)This study evaluates some available schemes designed to solve the stochastic collection equation (SCE) for collision?coalescence of hydrometeors using a size-resolved (bin) microphysics approach and documents their numerical ... -
On the Time Evolution of Limited-Area Ensemble Variance: Case Studies with the Convection-Permitting Ensemble COSMO-E
(American Meteorological Society, 2018)Dynamical processes determining the time evolution of difference kinetic energy (DKE) in a limited-area domain are investigated with the convection-permitting ensemble model COSMO-E for a forecasting period of 4 days. DKE ... -
On the Choice of Momentum Control Variables and Covariance Modeling for Mesoscale Data Assimilation
(American Meteorological Society, 2018)For mesoscale variational data assimilation with high-resolution observations, there has been an issue concerning the choice of momentum control variables and related covariance modeling. This paper addresses the theoretical ... -
Subgrid Parameterizations of the Eddy–Eddy, Eddy–Mean Field, Eddy–Topographic, Mean Field–Mean Field, and Mean Field–Topographic Interactions in Atmospheric Models
(American Meteorological Society, 2018)Parameterizations are developed for each of the subgrid turbulence interaction classes in fully three-dimensional global atmospheric flows over topography, typical of January and July climate states. Stochastic and ... -
Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements
(American Meteorological Society, 2018)Aerosol samples were collected over Beijing, China, during several flights in November 2011. Aerosol composition of nonrefractory submicron particles (NR-PM1) was measured by an Aerodyne compact time-of-flight aerosol mass ... -
Parameterization of the Bulk Liquid Fraction on Mixed-Phase Particles in the Predicted Particle Properties (P3) Scheme: Description and Idealized Simulations
(American Meteorological Society, 2018)Bulk microphysics parameterizations that are used to represent clouds and precipitation usually allow only solid and liquid hydrometeors. Predicting the bulk liquid fraction on ice allows an explicit representation of ... -
The Axisymmetric and Asymmetric Aspects of the Secondary Eyewall Formation in a Numerically Simulated Tropical Cyclone under Idealized Conditions on an f Plane
(American Meteorological Society, 2018)The axisymmetric and asymmetric aspects of the secondary eyewall formation (SEF) in a numerically simulated tropical cyclone (TC) under idealized conditions were analyzed. Consistent with previous findings, prior to the ... -
An Improved Double-Gaussian Closure for the Subgrid Vertical Velocity Probability Distribution Function
(American Meteorological Society, 2018)The vertical velocity probability distribution function (PDF) is analyzed throughout the depth of the lower atmosphere, including the subcloud and cloud layers, in four large-eddy simulation (LES) cases of shallow cumulus ... -
A General Method for Estimating Bulk 2D Projections of Ice Particle Shape: Theory and Applications
(American Meteorological Society, 2018)The orientation of falling ice particles directly influences estimates of microphysical and radiative bulk quantities as well as in situ retrievals of size, shape, and mass. However, retrieval efforts and bulk calculations ... -
The Potential Role of Atmospheric Bores and Gravity Waves in the Initiation and Maintenance of Nocturnal Convection over the Southern Great Plains
(American Meteorological Society, 2018)This investigation explores the relationship among bores, gravity waves, and convection within the nocturnal environment through the utilization of measurements taken during the International H2O Project (IHOP_2002) over ... -
A New Parameterization of the Accretion of Cloud Water by Graupel and Its Evaluation through Cloud and Precipitation Simulations
(American Meteorological Society, 2018)A new parameterization of the accretion of cloud water by graupel for use in bulk microphysics schemes is derived by analytically integrating the stochastic collection equation (SCE). In this parameterization, the collection ... -
The Effect of Land Surface Heterogeneity and Background Wind on Shallow Cumulus Clouds and the Transition to Deeper Convection
(American Meteorological Society, 2018)Idealized large-eddy simulations (LESs) with prescribed heterogeneous land surface heat fluxes are performed to study the impact of the heterogeneity length scale and background wind speed on the development of shallow ... -
Stability and Sea State as Limiting Conditions for TKE Dissipation and Dissipative Heating
(American Meteorological Society, 2019)This study analyzes high-resolution ship data collected in the Gulf of Mexico during the Lagrangian Submesoscale Experiment (LASER) from January to February 2016 to produce the first reported measurements of dissipative ...