Wikindx Resources

Journal Article: BibTeX citation key:  Guy2012
Guy, N. & Rutledge, S. A. (2012) Regional comparison of West African convective characteristics: A TRMM-based climatology. IN Quarterly Journal of the Royal Meteorological Society, 138. 1179–1195.
Added by: Nick Guy 2012-03-21 21:44:45    Last Edited by: Nick Guy 2013-05-06 16:37:20
 B  
Categories: Atmospheric processes, General, Monsoon system and its variability
Keywords: Clouds - Convection, Precipitation, Satellites
Creators: Guy, Rutledge
Collection: Quarterly Journal of the Royal Meteorological Society

Peer reviewed
Number of views:  809
Popularity index:  42.71%

 
Abstract
A 13–year (1998–2010) climatology of mesoscale convective characteristics associated with the West African monsoon are investigated using precipitation radar and passive microwave data from the NASA Tropical Rainfall Measuring Mission satellite. Seven regions defined as continental northeast and northwest, southeast and southwest, coastal, and maritime north and south are compared to analyze zonal and meridional differences. Data are categorized according to identified African easterly wave (AEW) phase and when no wave is present. While some enhancements are observed in association with AEW regimes, regional differences were generally more apparent than wave vs. no–wave differences. Convective intensity metrics confirm that land–based systems exhibit stronger characteristics, such as higher storm top and maximum 30–dBZ heights and significant 85–GHz brightness temperature depressions. Continental systems also contain a lower fraction of points identified as stratiform. Results suggest that precipitation processes also varied depending upon region and AEW regime, with warm–rain processes more apparent over the ocean and the southwest continental region and ice–based microphysics more dominant over land, including mixed–phase processes. AEW regimes did show variability in stratiform fraction and ice and liquid water content, suggesting modulation of mesoscale characteristics possibly through feedback with the synoptic environment.
Added by: Nick Guy    Last Edited by: Nick Guy