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Squall Lines and Convectively Coupled Gravity Waves in the Tropics: Why Do Most Cloud Systems Propagate Westward?
Publisher: American Meteorological Society
Abstract: he coupling between tropical convection and zonally propagating gravity waves is assessed through Fourier analysis of high-resolution (3-hourly, 0.5°) satellite rainfall data. Results show the familiar enhancement in power ...
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 ...
Multiscale Convective Wave Disturbances in the Tropics: Insights from a Two-Dimensional Cloud-Resolving Model
Publisher: American Meteorological Society
Abstract: Multiscale convective wave disturbances with structures broadly resembling observed tropical waves are found to emerge spontaneously in a nonrotating, two-dimensional cloud model forced by uniform cooling. To articulate ...
An Object-Based Approach to Assessing the Organization of Tropical Convection
Publisher: American Meteorological Society
Abstract: he organization of tropical convection is assessed through an object-based analysis of satellite brightness temperature data Tb, a proxy for convective activity. The analysis involves the detection of contiguous cloud ...
Clouds Associated with the Madden–Julian Oscillation: A New Perspective from CloudSat
Publisher: American Meteorological Society
Abstract: he evolution of total cloud cover and cloud types is composited across the Madden?Julian oscillation (MJO) using CloudSat data for June 2006?May 2010. Two approaches are used to define MJO phases: 1) the local phase is ...
Some Simple Simulations of Thunderstorm Outflows
Publisher: American Meteorological Society
Abstract: Three idealized simulations of thunderstorm outflows are presented. Each outflow is a response to an instantaneous low-level cooling. The vertical structures of the coolings differ as do the environments in which the ...
Vertical-Mode and Cloud Decomposition of Large-Scale Convectively Coupled Gravity Waves in a Two-Dimensional Cloud-Resolving Model
Publisher: American Meteorological Society
Abstract: This paper describes an analysis of large-scale [O(1000 km)] convectively coupled gravity waves simulated using a two-dimensional cloud-resolving model. The waves develop spontaneously under uniform radiative cooling and ...
Tropical Origins of Weeks 2–4 Forecast Errors during the Northern Hemisphere Cool Season
Publisher: American Meteorological Society
The Role of Subtropical Rossby Waves in Amplifying the Divergent Circulation of the Madden–Julian Oscillation
Publisher: American Meteorological Society
A Comparison of OLR and Circulation-Based Indices for Tracking the MJO
Publisher: American Meteorological Society
Abstract: wo univariate indices of the Madden?Julian oscillation (MJO) based on outgoing longwave radiation (OLR) are developed to track the convective component of the MJO while taking into account the seasonal cycle. These are ...