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Gregarious Tropical Convection
Publisher: American Meteorological Society
Abstract: A beat source with a vertical profile like that of observed tropical mesoscale convective systems (MCSs) is shown to cause, through inviscid gravity wave dynamics, upward displacement at low levels in a mesoscale region ...
Convective Inhibition, Subgrid-Scale Triggering Energy, and Stratiform Instability in a Toy Tropical Wave Model
Publisher: American Meteorological Society
Abstract: A toy model of large-scale deep convection variations is constructed around a radiative?convective equilibrium climate, with an observed mean sounding as its thermodynamic basic state. Vertical structure is truncated at ...
Sensitivities of Cumulus-Ensemble Rainfall in a Cloud-Resolving Model with Parameterized Large-Scale Dynamics
Publisher: American Meteorological Society
Abstract: The problem of closure in cumulus parameterization requires an understanding of the sensitivities of convective cloud systems to their large-scale setting. As a step toward such an understanding, this study probes some ...
NOTES AND CORRESPONDENCE Convective Eddy Momentum Tendencies in Long Cloud-Resolving Model Simulations
Publisher: American Meteorological Society
Abstract: Domain-average momentum budgets are examined in several multiday cloud-resolving model simulations of deep tropical convection in realistic shears. The convective eddy momentum tendency F, neglected in many global circulation ...
Doppler Radar Observations of Mesoscale Wind Divergence in Regions of Tropical Convection
Publisher: American Meteorological Society
Abstract: A simple new analysis method for large single-Doppler radar datasets is presented, using data from several tropical field experiments. A cylindrical grid is chosen, to respect both the geophysical importance of altitude ...
Effect of Vertical Dipole Temperature Anomalies on Convection in a Cloud Model
Publisher: American Meteorological Society
Abstract: A cloud-resolving model is used to study the effects of a vertical temperature dipole on convective cloud development. Such dipole anomalies, with a warm-above-cool structure in the troposphere, are known to be forced by ...
Relationships between Large Precipitating Systems and Atmospheric Factors at a Grid Scale
Publisher: American Meteorological Society
Abstract: n this study, TRMM-observed precipitation in the tropics is decomposed according to the horizontal area of radar precipitation features, with special emphasis on large systems (rain area > 104 km2) that contribute roughly ...
Diabatic Divergence Profiles in Western Pacific Mesoscale Convective Systems
Publisher: American Meteorological Society
Abstract: Heating in the atmosphere can be expressed as diabatic divergence δd, which is nearly equal to the actual horizontal divergence δ in tropical convection. High-quality δ profile measurements from airborne Doppler radar ...
Transient Environmental Sensitivities of Explicitly Simulated Tropical Convection
Publisher: American Meteorological Society
Abstract: A three-dimensional cloud-resolving model, maintained in a statistically steady convecting state by tropics-like forcing, is subjected to sudden (10 min) stimuli consisting of horizontally homogeneous temperature and/or ...
Diagnosis of Tropical Biases and the MJO from Patterns in the MERRA Analysis Tendency Fields
Publisher: American Meteorological Society
Abstract: he Modern-Era Reanalysis for Research and Applications (MERRA) is realistic, including its Madden?Julian oscillation (MJO), which the underlying model [Goddard Earth Observing System, version 5 (GEOS-5)] lacks. In the MERRA ...
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