Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2121-2140 of 13215
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A New SATIRE-S Spectral Solar Irradiance Reconstruction for Solar Cycles 21–23 and Its Implications for Stratospheric Ozone
(American Meteorological Society, 2014)he authors present a revised and extended total and spectral solar irradiance (SSI) reconstruction, which includes a wavelength-dependent uncertainty estimate, spanning the last three solar cycles using the Spectral and ... -
A Unified Convection Scheme (UNICON). Part II: Simulation
(American Meteorological Society, 2014)unified convection scheme (UNICON) is implemented into the Community Atmosphere Model, version 5 (CAM5), and tested in single-column and global simulations forced by observed sea surface temperature. Compared to CAM5, ... -
On the Atmospheric Regulation of the Growth of Moderate to Deep Cumulonimbus in a Tropical Environment
(American Meteorological Society, 2013)ome cumulus clouds with tops between 3 and 7 km (Cu3km?7km) remain in this height region throughout their lifetime (congestus) while others develop into deeper clouds (cumulonimbus). This study describes two techniques to ... -
Trends in Monthly Tropopause Characteristics Observed over Taipei, Taiwan
(American Meteorological Society, 2014)his study presents monthly trends in the cold-point tropopause (CPT), calculated using three decades of radiosonde data from 1981 to 2010 over Taipei, Taiwan (25°01?N, 121°27?E). Multivariate regression analysis has been ... -
Singular Vectors for Barotropic, Hurricane-Like Vortices in Horizontal Shear: Structure and Perturbation Growth Mechanisms
(American Meteorological Society, 2013)n this study the structure and evolution of singular vectors (SVs) for stable and unstable hurricane-like vortices in background flows with horizontal shear are investigated on f and ? planes using a nondivergent barotropic ... -
A Unified Convection Scheme (UNICON). Part I: Formulation
(American Meteorological Society, 2014)he author develops a unified convection scheme (UNICON) that parameterizes relative (i.e., with respect to the grid-mean vertical flow) subgrid vertical transport by nonlocal asymmetric turbulent eddies. UNICON is a ... -
A Numerical Study on the Ventilation Coefficients of Falling Hailstones
(American Meteorological Society, 2014)he ventilation coefficients that represent the enhancement of mass transfer rate due to the falling motion of spherical hailstones in an atmosphere of 460 hPa and 248 K are computed by numerically solving the unsteady ... -
An Investigation of Warm Rainfall Microphysics in the Southern Appalachians: Orographic Enhancement via Low-Level Seeder–Feeder Interactions
(American Meteorological Society, 2014)bservations of the vertical structure of rainfall, surface rain rates, and drop size distributions (DSDs) in the southern Appalachians were analyzed with a focus on the diurnal cycle of rainfall. In the inner mountain ... -
Available Energy of Geophysical Systems
(American Meteorological Society, 2013)n alternative derivation of the available energy for a geophysical fluid system is presented. It is shown that determination of the equilibrium temperature of the system by the minimization of an energy availability function ... -
Measurements of Turbulent Mixing and Subsiding Shells in Trade Wind Cumuli
(American Meteorological Society, 2014)igh-resolution measurements of the turbulent, thermodynamic, and microphysical structure of the edges of trade wind cumuli have been performed with the Airborne Cloud Turbulence Observation System. Lateral entrainment of ... -
Nonlinear Feedback in a Five-Dimensional Lorenz Model
(American Meteorological Society, 2013)n this study, based on the number of modes, the original three-dimensional Lorenz model (3DLM) is generalized with two additional modes [five-dimensional Lorenz model (5DLM)] to examine their role in the predictability of ... -
Diabatic Balance Model for the Equatorial Atmosphere
(American Meteorological Society, 2013)sing an asymptotic expansion, a balance model is derived for the shallow-water equations (SWE) on the equatorial ? plane that is valid for planetary-scale equatorial dynamics and includes Kelvin waves. In contrast to many ... -
A Search for Chaotic Behavior in Northern Hemisphere Stratospheric Variability
(American Meteorological Society, 2013)orthern Hemisphere stratospheric variability is investigated with respect to chaotic behavior using time series from three different variables extracted from four different reanalysis products and two numerical model runs ... -
Reply to “Comments on ‘Preconditioning Deep Convection with Cumulus Congestus’”
(American Meteorological Society, 2013)n his comment, D. M. Schultz asked for clarification concerning (i) the validity of the results of C. Hohenegger and B. Stevens for the development of convection over the midlatitudes and (ii) the exact meaning and computation ... -
Entropic Balance Theory and Variational Field Lagrangian Formalism: Tornadogenesis
(American Meteorological Society, 2014)he entropic balance theory has been applied with outstanding results to explain many important aspects of tornadic phenomena. The theory was originally developed in variational (probabilistic) field Lagrangian formalism, ... -
Modulation of the Convectively Coupled Kelvin Waves over South America and the Tropical Atlantic Ocean in Association with the Madden–Julian Oscillation
(American Meteorological Society, 2014)n this study, evidence of the strong modulation of the convectively coupled Kelvin wave (CCKW) activity by the Madden?Julian oscillation (MJO) is presented, with a particular focus over the South America and tropical ... -
Eddy-Induced Growth Rate of Low-Frequency Variability and Its Mid- to Late Winter Suppression in the Northern Hemisphere
(American Meteorological Society, 2014)ynoptic eddy and low-frequency flow (SELF) feedback plays an important role in reinforcing low-frequency variability (LFV). Recent studies showed that an eddy-induced growth (EIG) or instability makes a fundamental ... -
Effective Diffusivity in Baroclinic Flow
(American Meteorological Society, 2013)arge-scale chaotic stirring stretches tracer contours into filaments containing fine spatial scales until small-scale diffusive processes dissipate tracer variance. Quantification of tracer transport in such circumstances ... -
Vorticity Evolution Leading to Tornadogenesis and Tornadogenesis Failure in Simulated Supercells
(American Meteorological Society, 2013)three-dimensional idealized cloud model was used to study the storm-scale differences between simulated supercells that produce tornado-like vortices and those that do not. Each simulation was initialized with a different ... -
Catastrophe-Concept-Based Cumulus Parameterization: Correction of Systematic Errors in the Precipitation Diurnal Cycle over Land in a GCM
(American Meteorological Society, 2013)he onset of cumulus convection in a grid column is a catastrophe, also known as a subcritical instability. Accordingly, in designing a cumulus parameterization scheme the onset of cumulus convection requires that a parameter ...