Journal of the Atmospheric Sciences: Recent submissions
Now showing items 1801-1820 of 13215
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Extracting Microphysical Impacts in Large-Eddy Simulations of Shallow Convection
(American Meteorological Society, 2014)simple methodology is proposed to extract impacts of cloud microphysics on macrophysical cloud-field properties in large-eddy simulations of shallow convection. These impacts are typically difficult to assess because of ... -
Mechanism for the Formation of Equatorial Superrotation in Forced Shallow-Water Turbulence with Newtonian Cooling
(American Meteorological Society, 2014)orced shallow-water turbulence on a rotating sphere with Newtonian cooling is examined with the aim of elucidating the mechanism of the robust formation of equatorial superrotation reported by R. K. Scott and L. M. Polvani. ... -
Diurnal and Seasonal Lightning Variability over the Gulf Stream and the Gulf of Mexico
(American Meteorological Society, 2015)ecent observations from the World Wide Lightning Location Network (WWLLN) reveal a pronounced lightning maximum over the warm waters of the Gulf Stream that exhibits distinct diurnal and seasonal variability. Lightning is ... -
A Study of Multiple Tropopause Structures Caused by Inertia–Gravity Waves in the Antarctic
(American Meteorological Society, 2015)ultiple tropopauses (MTs) defined by the World Meteorological Organization are frequently detected from autumn to spring at Syowa Station (69.0°S, 39.6°E). The dynamical mechanism of MT events was examined by observations ... -
Turbulent Mixing in Shallow Trade Wind Cumuli: Dependence on Cloud Life Cycle
(American Meteorological Society, 2015)elicopter-borne observations of the impact of turbulent mixing and cloud microphysical properties in shallow trade wind cumuli are presented. The measurements were collected during the Cloud, Aerosol, Radiation and Turbulence ... -
Idealized Quasi-Biennial Oscillations in an Ensemble of Dry GCM Dynamical Cores
(American Meteorological Society, 2015)he paper demonstrates that quasi-biennial oscillation (QBO)-like oscillations can be simulated in an ensemble of dry GCM dynamical cores that are driven by a simple Held?Suarez temperature relaxation and low-level Rayleigh ... -
Impacts of Evaporation of Rainwater on Tropical Cyclone Structure and Intensity—A Revisit
(American Meteorological Society, 2015)he impact of evaporation of rainwater on tropical cyclone (TC) intensity and structure is revisited in this study. Evaporative cooling can result in strong downdrafts and produce low?equivalent potential temperature air ... -
Tropical Oceanic Rainfall and Sea Surface Temperature Structure: Parsing Causation from Correlation in the MJO
(American Meteorological Society, 2015)ased upon on the findings of Y. Li and R. E. Carbone, the association of tropical rainfall with SST structure is further explored, with emphasis on the MJO passband. Analyses include the tropical Indian Ocean, Maritime ... -
Annular Mode Variability of the Atmospheric Meridional Energy Transport and Circulation
(American Meteorological Society, 2015)onth-to-month variability in the meridional atmospheric energy transport is analyzed in the Modern-Era Retrospective Analysis for Research and Applications (MERRA) reanalysis for 1979?2012. The meridional transport of moist ... -
Relative Dispersion in the Atmosphere from Reanalysis Winds
(American Meteorological Society, 2015)he dispersion of pairs of synthetic particles, advected with ECMWF winds, is examined. The particles were deployed at three latitudes and on three potential temperature surfaces in both hemispheres. Separation statistics ... -
Reply to “Comments on ‘The Unusual Southern Hemisphere Winter of 2002’”
(American Meteorological Society, 2014) -
Diurnally Modulated Cumulus Moistening in the Preonset Stage of the Madden–Julian Oscillation during DYNAMO
(American Meteorological Society, 2014)tmospheric soundings, radar, and air?sea flux measurements collected during Dynamics of the Madden?Julian Oscillation (DYNAMO) are employed to study MJO convective onset (i.e., the transition from shallow to deep convection) ... -
Variability of Zonal Mean Tropical Temperatures Derived from a Decade of GPS Radio Occultation Data
(American Meteorological Society, 2014)ariability in tropical zonal mean temperatures over 10?30 km is analyzed based on high-quality, high-vertical-resolution GPS temperature measurements covering 2001?13. The observations are used to quantify variability ... -
The Simulated Structure and Evolution of a Quasi-Idealized Warm-Season Convective System with a Training Convective Line
(American Meteorological Society, 2015)his study details the development and use of an idealized modeling framework to simulate a quasi-stationary heavy-rain-producing mesoscale convective system (MCS). A 36-h composite progression of atmospheric fields computed ... -
Genesis of Tropical Storm Debby (2006) within an African Easterly Wave: Roles of the Bottom-Up and Midlevel Pouch Processes
(American Meteorological Society, 2015)he ?bottom up? generation of low-level vortices (LVs) and midlevel vortices (MVs) during the genesis of Tropical Storm Debby (2006) and the roles of a midlevel ?marsupial pouch? associated with an African easterly wave ... -
S3T Stability of the Homogeneous State of Barotropic Beta-Plane Turbulence
(American Meteorological Society, 2015)onal jets and nonzonal large-scale flows are often present in forced?dissipative barotropic turbulence on a beta plane. The dynamics underlying the formation of both zonal and nonzonal coherent structures is investigated ... -
Decomposition of Atmospheric Disturbances into Standing and Traveling Components, with Application to Northern Hemisphere Planetary Waves and Stratosphere–Troposphere Coupling
(American Meteorological Society, 2014)his study updates a body of literature that aims to separate atmospheric disturbances into standing and traveling zonal wave components. Classical wavenumber?frequency analysis decomposes longitude- and time-dependent ... -
The Atmospheric Response to Weak Sea Surface Temperature Fronts
(American Meteorological Society, 2015)he response of the atmospheric boundary layer to fronts of sea surface temperature (SST) is characterized by correlations between wind stress divergence and the downwind component of the SST gradient and between the wind ... -
Understanding the Influence of Measurement Uncertainty on the Atmospheric Transition in Rainfall and Column Water Vapor
(American Meteorological Society, 2015)easurement uncertainty plays a key role in understanding physical relationships. This is particularly the case near phase transitions where order parameters undergo fast changes and display large variability. Here the ... -
The Genesis of Mesovortices within a Real-Data Simulation of a Bow Echo System
(American Meteorological Society, 2015)he genesis of two mesovortices (MVs) within a real-data, convection-resolving simulation of the 8 May 2009 central U.S. bow echo system is studied. Both MVs form near the bow apex but differ distinctively in intensity, ...