Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1481-1500 of 13215
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Stationary Wave Reflection as a Mechanism for Zonalizing the Atlantic Winter Jet at the LGM
(American Meteorological Society, 2016)urrent estimates of the height of the Laurentide Ice Sheet (LIS) at the Last Glacial Maximum (LGM) range from around 3000 to 4500 m. Modeling studies of the LGM, using low-end estimates of the LIS height, show a relatively ... -
Interannual Variability in North Atlantic Weather: Data Analysis and a Quasigeostrophic Model
(American Meteorological Society, 2016)his paper addresses the effect of interannual variability in jet stream orientation on weather systems over the North Atlantic basin (NAB). The observational analysis relies on 65 yr of NCEP?NCAR reanalysis (1948?2012). ... -
The Response of the Lower Stratosphere to Zonally Symmetric Thermal and Mechanical Forcing
(American Meteorological Society, 2016)he response of the atmosphere to zonally symmetric applied heating and mechanical forcing is considered, allowing for the fact that the response may include a change in the wave force (or ?wave drag?). A scaling argument ... -
The Double Peak in Upwelling and Heating in the Tropical Lower Stratosphere
(American Meteorological Society, 2016)he processes responsible for double-peak latitudinal structures in the time-averaged tropical lower-stratospheric upwelling, centered near 70 hPa and 20°N/S, previously noted in ERA-Interim and other reanalysis and model ... -
A Multisensor Investigation of Rime Splintering in Tropical Maritime Cumuli
(American Meteorological Society, 2016)hree flights from the Ice in Clouds Experiment?Tropical (ICE-T) field campaign examined the onset of ice near the ascending cloud tops of tropical maritime cumuli as they cooled from 0° to ?14°C. Careful quantitative ... -
Isolating the Temperature Feedback Loop and Its Effects on Surface Temperature
(American Meteorological Society, 2016)limate feedback processes are known to substantially amplify the surface warming response to an increase of greenhouse gases. When the forcing and feedbacks modify the temperature response they trigger temperature feedback ... -
The Transit-Time Distribution from the Northern Hemisphere Midlatitude Surface
(American Meteorological Society, 2016)he distribution of transit times from the Northern Hemisphere (NH) midlatitude surface is a fundamental property of tropospheric transport. Here, the authors present an analysis of the transit-time distribution (TTD) since ... -
The Mean Air Flow as Lagrangian Dynamics Approximation and Its Application to Moist Convection
(American Meteorological Society, 2016)his paper introduces the Mean Airflow as Lagrangian Dynamics Approximation (MAFALDA), a new method designed to extract thermodynamic cycles from numerical simulations of turbulent atmospheric flows. This approach relies ... -
Characteristics of the Heat Flux in the Unstable Atmospheric Surface Layer
(American Meteorological Society, 2016)he behavior of the heat flux H with respect to the stability parameter (=z/L, where z is the height above the ground, and L is the Obukhov length) in the unstable atmospheric surface layer is analyzed within the framework ... -
Statistical State Dynamics of Jet–Wave Coexistence in Barotropic Beta-Plane Turbulence
(American Meteorological Society, 2016)ets coexist with planetary-scale waves in the turbulence of planetary atmospheres. The coherent component of these structures arises from cooperative interaction between the coherent structures and the incoherent small-scale ... -
Analytical Solutions of the Supersaturation Equation for a Warm Cloud
(American Meteorological Society, 2016)pproximate solutions of the supersaturation equation are derived for a warm cloud. These solutions take account of the growth of the droplet radius but are only valid for small times. However, the validity of the solutions ... -
A Large-Eddy Simulation Study of Atmospheric Boundary Layer Influence on Stratified Flows over Terrain
(American Meteorological Society, 2016)he impact of atmospheric boundary layer (ABL) interactions with large-scale stably stratified flow over an isolated, two-dimensional hill is investigated using turbulence-resolving large-eddy simulations. The onset of ... -
Practical Approximations to Seasonal Fluctuation–Dissipation Operators Given a Limited Sample
(American Meteorological Society, 2016)his paper studies operators inspired by the fluctuation?dissipation theorem that consider the seasonality (nonstationarity) of the climate system under conditions of limited sample size relevant to application of the method ... -
Past, Present, and Future Atmospheric Nitrogen Deposition
(American Meteorological Society, 2016)eactive nitrogen emissions into the atmosphere are increasing as a result of human activities, affecting nitrogen deposition to the surface and impacting the productivity of terrestrial and marine ecosystems. An atmospheric ... -
Aerosol–Stratocumulus–Radiation Interactions over the Southeast Pacific: Implications to the Underlying Air–Sea Coupling
(American Meteorological Society, 2016)ecently, Chen et al. used a combination of observations and WRF simulations to illustrate that the anthropogenic aerosol?cloud microphysics?radiation interactions over the southeast Pacific can potentially reduce the ... -
Impacts of the Diurnal Radiation Cycle on the Formation, Intensity, and Structure of Hurricane Edouard (2014)
(American Meteorological Society, 2016)his work examines the impacts of the diurnally varying radiation cycle on the formation, intensity, structure, and track of Hurricane Edouard (2014) at different stages of its life cycle through convection-permitting ... -
Vertical Momentum Transports Associated with Moist Convection and Gravity Waves in a Minimal Model of QBO-like Oscillation
(American Meteorological Society, 2016)self-sustained oscillation dynamically analogous to the equatorial quasi-biennial oscillation (QBO) was obtained as a radiative?moist-convective quasi-equilibrium state in a minimal model of the stratosphere?troposphere ... -
On the Susceptibility of Cold Tropical Cirrus to Ice Nuclei Abundance
(American Meteorological Society, 2016)umerical simulations of cirrus formation in the tropical tropopause layer (TTL) during boreal wintertime are used to evaluate the impact of heterogeneous ice nuclei (IN) abundance on cold cloud microphysical properties and ... -
Effect of Snow Grain Shape on Snow Albedo
(American Meteorological Society, 2016)adiative transfer models of snow albedo have usually assumed a spherical shape for the snow grains, using Mie theory to compute single-scattering properties. The scattering by more realistic nonspherical snow grains is ... -
Evolution of the Shape of the Raindrop Size Distribution in Simulated Shallow Cumulus
(American Meteorological Society, 2016)n this paper, the evolution of the raindrop size distribution (RSD) is investigated for two isolated shallow cumulus clouds that are modeled with large-eddy simulations. For a two-moment bulk rain microphysics scheme that ...