Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2641-2660 of 13215
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A Mechanism for the Effect of Tropospheric Jet Structure on the Annular Mode–Like Response to Stratospheric Forcing
(American Meteorological Society, 2012)or many climate forcings the dominant response of the extratropical circulation is a latitudinal shift of the tropospheric midlatitude jets. The magnitude of this response appears to depend on climatological jet latitude ... -
On the Linkages between the Tropospheric Isentropic Slope and Eddy Fluxes of Heat during Northern Hemisphere Winter
(American Meteorological Society, 2012)revious studies have demonstrated the key role of baroclinicity and thus the isentropic slope in determining the climatological-mean distribution of the tropospheric eddy fluxes of heat. Here the authors examine the role ... -
Reply
(American Meteorological Society, 2012)n response to a comment on their previous note about the Voigt line profile, here the authors clarify relevant statements and numeric algorithms in the original note. -
A Trajectory-Based Investigation of Physical and Dynamical Processes That Govern the Temporal Evolution of the Subtropical Jet Streams over Africa
(American Meteorological Society, 2012)ropical, subtropical, and extratropical dynamical processes govern the synoptic-scale evolution of the subtropical jet stream(s) over Africa. However, the relative importance of the respective effects is still under debate ... -
Observed Decadal North Atlantic Tripole SST Variability. Part II: Diagnosis of Mechanisms
(American Meteorological Society, 2011)n Part I of this study, the atmospheric weather noise for 1951?2000 was inferred from an atmospheric analysis in conjunction with SST-forced AGCM simulations and used to force interactive ensemble coupled GCM simulations ... -
Complex Wavenumber Rossby Wave Ray Tracing
(American Meteorological Society, 2012)his paper presents a methodology for performing complex wavenumber ray tracing in which both wave trajectory and amplitude are calculated. This ray-tracing framework is first derived using a scaling in which the imaginary ... -
On the Influence of Raindrop Collision Outcomes on Equilibrium Drop Size Distributions
(American Meteorological Society, 2012)he objective of this study is to evaluate the impact of a new parameterization of drop?drop collision outcomes based on the relationship between Weber number and drop diameter ratios on the dynamical simulation of raindrop ... -
Modeling of Forecast Sensitivity on the March of Monsoon Isochrones from Kerala to New Delhi: The First 25 Days
(American Meteorological Society, 2012)his study addresses observational and modeling sensitivity on the march of the onset isochrones of the Indian summer monsoon. The first 25 days of the passage of the isochrones of monsoon onset is of great scientific ... -
Self-Stratification of Tropical Cyclone Outflow. Part II: Implications for Storm Intensification
(American Meteorological Society, 2011)ropical cyclones intensify and are maintained by surface enthalpy fluxes that result from the thermodynamics disequilibrium that exists between the tropical oceans and atmosphere. While this general result has been known ... -
Observational Estimates of the Horizontal Eddy Diffusivity and Mixing Length in the Low-Level Region of Intense Hurricanes
(American Meteorological Society, 2011)his study examines further the characteristics of turbulent flow in the low-level region of intense hurricanes using in situ aircraft observations. The data analyzed here are the flight-level data collected by research ... -
Observed Decadal North Atlantic Tripole SST Variability. Part I: Weather Noise Forcing and Coupled Response
(American Meteorological Society, 2011)he mechanisms responsible for the decadal variability of the tripole mode of North Atlantic SST during the latter half of the twentieth century are diagnosed using a new technique. The SST and associated ocean variability ... -
Ice Crystals Growing from Vapor in Supercooled Clouds between −2.5° and −22°C: Testing Current Parameterization Methods Using Laboratory Data
(American Meteorological Society, 2011)he physical and empirical relationships used by microphysics schemes to control the rate at which vapor is transferred to ice crystals growing in supercooled clouds are compared with laboratory data to evaluate the realism ... -
A Warm-Bin–Cold-Bulk Hybrid Cloud Microphysical Model
(American Meteorological Society, 2012)his study describes a newly developed bin?bulk hybrid cloud microphysical model named MSSG-Bin, which has been implemented in the Multi-Scale Simulator for the Geoenvironment (MSSG). In the hybrid approach, a spectral bin ... -
An Axisymmetric View of Concentric Eyewall Evolution in Hurricane Rita (2005)
(American Meteorological Society, 2012)ultiplatform observations of Hurricane Rita (2005) were collected as part of the Hurricane Rainband and Intensity Change Experiment (RAINEX) field campaign during a concentric eyewall stage of the storm?s life cycle that ... -
Thermodynamic and Aerosol Controls in Southeast Pacific Stratocumulus
(American Meteorological Society, 2012)near-large-eddy simulation approach with size-revolving (bin) microphysics is employed to evaluate the relative sensitivity of southeast Pacific marine boundary layer cloud properties to thermodynamic and aerosol parameters. ... -
Predictability Associated with Nonlinear Regimes in an Atmospheric Model
(American Meteorological Society, 2011)tmospheric regimes are midlatitude flow patterns that persist for periods of time exceeding a few days. Here, the authors analyzed the output of an idealized atmospheric model (QG3) to examine the relationship between ... -
Radiative–Dynamical Feedbacks in Low Liquid Water Path Stratiform Clouds
(American Meteorological Society, 2012)hen stratiform-cloud-integrated radiative flux divergence (heating) is dependent on liquid water path (LWP) and droplet concentration Nd, feedbacks between cloud dynamics and this heating can exist. These feedbacks can be ... -
Subgrid Model with Scaling Laws for Atmospheric Simulations
(American Meteorological Society, 2011)ubgrid-scale parameterizations with self-similar scaling laws are developed for large-eddy simulations (LESs) of atmospheric flows. The key new contribution is the development of scaling laws that govern how these ... -
Assimilation of Reflectivity Data in a Convective-Scale, Cycled 3DVAR Framework with Hydrometeor Classification
(American Meteorological Society, 2011)he impact of assimilating radar reflectivity and radial velocity data with an intermittent, cycled three-dimensional variational assimilation (3DVAR) system is explored using an idealized thunderstorm case and a real data ... -
Temperature–Moisture Dependence of the Deep Convective Transition as a Constraint on Entrainment in Climate Models
(American Meteorological Society, 2011)roperties of the transition to strong deep convection, as previously observed in satellite precipitation statistics, are analyzed using parcel stability computations and a convective plume velocity equation. A set of ...