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RISAn Explanation for Intense Frontal Updrafts and Narrow Cold-Frontal Rainbands
Publisher: American Meteorological Society
Abstract: Measurements with Doppler radar, and instrumented aircraft and towers, have revealed that surface cold fronts often have cross-frontal circulations organized on a scale of a kilometer or less. These circulations include ...
Observing System Simulation Experiments and Objective Analysis Tests in Support of the Goals of the Atmospheric Radiation Measurement Program
Publisher: American Meteorological Society
Abstract: Time continuous data assimilation or four-dimensional data assimilation (FDDA) is a collection of techniques where observations are ingested into a numerical model during the simulation in order to produce a physically ...
A Proposed Mechanism for the Intrusion of Dry Air into the Tropical Western Pacific Region
Publisher: American Meteorological Society
Abstract: Recent studies using data from the Tropical Ocean and Global Atmosphere program?s Coupled Ocean?Atmosphere Response Experiment (TOGA COARE) have shown that synoptic-scale areas of extremely dry air can occur in the troposphere ...
Dynamics and Fine Structure of a Microburst
Publisher: American Meteorological Society
Abstract: Details of the structure of a moderate reflectivity microburst were provided by dual-Doppler radar measurements during the Phoenix II convective boundary layer experiment. The dated allowed high resolution of the descending ...
A Numerical Study of a Rotating Downburst
Publisher: American Meteorological Society
Abstract: Previous studies have revealed that convective storms often contain intense small-scale downdrafts, termed ?downbursts,? that are a significant hazard to aviation. These downbursts sometimes possess strong rotation about ...
Microphysical Processes Associated with Intense Frontal Rainbands and the Effect of Evaporation and Melting on Frontal Dynamics
Publisher: American Meteorological Society
Abstract: Previous studies have shown that a surface cold front often coincides with a heavy band of precipitation commonly designated as a narrow cold-frontal rainband. The maximum rainfall rate within this band can exceed 100?200 ...
Evolution of Environmental Conditions Preceding the Development of a Nocturnal Mesoscale Convective Complex
Publisher: American Meteorological Society
Abstract: A large nocturnal mesoscale convective complex (MCC) developed on 4 June 1985 during the Oklaboma-Kansas Preliminary Regional Experiment for STORM-Central (PRE-STORM) field phase. It occurred near the climatological center ...
Updraft Dynamics within a Numerically Simulated Subtropical Rainband
Publisher: American Meteorological Society
Abstract: In this study a three-dimensional numerical cloud model is used to examine the early evolution of deep convective rainbands that occur in an environment of weak to moderate buoyancy and directionally varying lower-tropospheric ...
A Review of Convection Initiation and Motivation for IHOP_2002
Publisher: American Meteorological Society
Abstract: The International H2O Project (IHOP_2002) included four complementary research components: quantitative precipitation forecasting, convection initiation, atmospheric boundary layer processes, and instrumentation. This ...
The Mesoscale and Microscale Structure and Organization of Clouds and Precipitation in Midlatitude Cyclones. XI: Comparisons between Observational and Theoretical Aspects of Rainbands
Publisher: American Meteorological Society
Abstract: Comparisons are made between the characteristics of several types of rainbands observed in an extratropical cyclone and dynamical mechanisms relevant on the mesoscale. The warm-sector flow ahead of the cold front and above ...