Journal of the Atmospheric Sciences: Recent submissions
Now showing items 2541-2560 of 13215
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A New Perspective on the Excitation of Low-Tropospheric Mixed Rossby–Gravity Waves in Association with Energy Dispersion
(American Meteorological Society, 2012)his study investigates the synoptic-scale equatorial response to Rossby wave energy dispersion associated with off-equatorial wave activity sources and proposes a new mechanism for triggering low-level mixed Rossby?gravity ... -
Differences between More Divergent and More Rotational Types of Convectively Coupled Equatorial Waves. Part I: Space–Time Spectral Analyses
(American Meteorological Society, 2011)recipitation-related differences in different types of convectively coupled equatorial waves are examined here and in a companion paper. Here the authors show spectra and cross-spectra among tropical-belt time sections of ... -
Scalar Turbulence in Convective Boundary Layers by Changing the Entrainment Flux
(American Meteorological Society, 2012)large-eddy simulation model is adopted to investigate the evolution of scalars transported by atmospheric cloud-free convective boundary layer flows. Temperature fluctuations due to the ground release of sensible heat and ... -
CORRIGENDUM
(American Meteorological Society, 2012) -
How Does the Eye Warm? Part I: A Potential Temperature Budget Analysis of an Idealized Tropical Cyclone
(American Meteorological Society, 2012)n this first part of a two-part study, the mechanisms that accomplish the warming in the eye of tropical cyclones are investigated through a potential temperature budget analysis of an idealized simulation. The spatial ... -
A Detailed Normal-Mode Energetics of the General Circulation of the Atmosphere
(American Meteorological Society, 2012)n energetics formulation is here introduced that enables an explicit evaluation for the conversion rates between available potential energy and kinetic energy, the nonlinear interactions of both energy forms, and their ... -
The Roles of an Expanding Wind Field and Inertial Stability in Tropical Cyclone Secondary Eyewall Formation
(American Meteorological Society, 2012)he Weather and Research and Forecasting Model (WRF) is used to simulate secondary eyewall formation (SEF) in a tropical cyclone (TC) on the ? plane. The simulated SEF process is accompanied by an outward expansion of kinetic ... -
Vertical Structure of Tropical Cyclone Rainbands as Seen by the TRMM Precipitation Radar
(American Meteorological Society, 2012)en years of data from the Tropical Rainfall Measurement Mission satellite?s Precipitation Radar (TRMM PR) show the vertical structure of tropical cyclone rainbands. Radar-echo statistics show that rainbands have a two-layered ... -
Influence of the Subcloud Layer on the Development of a Deep Convective Ensemble
(American Meteorological Society, 2012)he rapid transition from shallow to deep convection is investigated using large-eddy simulations. The role of cold pools, which occur due to the evaporation of rainfall, is explored using a series of experiments in which ... -
On Imbalance Generated by Vortical Flows in a Two-Layer Spherical Boussinesq Primitive Equation Model
(American Meteorological Society, 2012)he spontaneous adjustment emission of inertia?gravity waves is investigated by examining the amount of imbalance generated during the evolution of unstable jets in an isentropic two-layer primitive equation model on the ... -
Practical and Intrinsic Predictability of Severe and Convective Weather at the Mesoscales
(American Meteorological Society, 2012)his study explores both the practical and intrinsic predictability of severe convective weather at the mesoscales using convection-permitting ensemble simulations of a squall line and bow echo event during the Bow Echo and ... -
Evaluation of Hydrometeor Phase and Ice Properties in Cloud-Resolving Model Simulations of Tropical Deep Convection Using Radiance and Polarization Measurements
(American Meteorological Society, 2012)atellite measurements are used to evaluate the glaciation, particle shape, and effective radius in cloud-resolving model simulations of tropical deep convection. Multidirectional polarized reflectances constrain the ice ... -
Origin of Non-Gaussian Regimes and Predictability in an Atmospheric Model
(American Meteorological Society, 2012)his study details properties of non-Gaussian regimes and state-dependent ensemble spreads of trajectories in a reduced phase space of an idealized three-level quasigeostrophic (QG3) dynamical model. Methodologically, ... -
A New Drag Relation for Aerodynamically Rough Flow over the Ocean
(American Meteorological Society, 2012)rom almost 7000 near-surface eddy-covariance flux measurements over the sea, the authors deduce a new air?sea drag relation for aerodynamically rough flow:Here u* is the measured friction velocity, and UN10 is the ... -
Latent Heating and Cooling Rates in Developing and Nondeveloping Tropical Disturbances during TCS-08: Radar-Equivalent Retrievals from Mesoscale Numerical Models and ELDORA
(American Meteorological Society, 2012)atent heating and cooling rates have a critical role in predicting tropical cyclone formation and intensification. In a prior study, Park and Elsberry estimated the latent heating and cooling rates from aircraft Doppler ... -
Potential Vorticity Attribution and Causality
(American Meteorological Society, 2012)he electrostatic analogy provides a well-known paradigm for the concept of potential vorticity (PV) attribution. Just as electric fields can be attributed to electric charges, so are localized PV anomalies thought to induce ... -
Effects of Sea-Salt Aerosols on Precipitation in Simulations of Shallow Cumulus
(American Meteorological Society, 2011)suite of large-eddy simulations with size-resolving microphysical processes was performed in order to assess effects of sea-salt aerosols on precipitation process in trade cumulus. Simulations based on observations from ... -
A Theory of Topographically Bound Balanced Motions and Application to Atmospheric Low-Level Jets
(American Meteorological Society, 2012)he subject of this study is topographically bound low-level jets, such as the South American summertime low-level jet on the eastern side of the Andes and its companion, the Chilean low-level jet on the western side of the ... -
Effects of Varying the Shape of the Convective Heating Profile on Convectively Coupled Gravity Waves and Moisture Modes
(American Meteorological Society, 2012)he analytical model of convectively coupled gravity waves and moisture modes of Raymond and Fuchs is extended to the case of top-heavy and bottom-heavy convective heating profiles. Top-heavy heating profiles favor gravity ... -
Observations of an Inertial Peak in the Intrinsic Wind Spectrum Shifted by Rotation in the Antarctic Vortex
(American Meteorological Society, 2012)pectral analyses of time series of zonal winds derived from locations of balloons drifting in the Southern Hemisphere polar vortex during the Vorcore campaign of the Stratéole program reveal a peak with a frequency near ...