Thermo-Electrodynamical analysis related to thunderstorm activities in Pantanal Sul Matogrossense, Brazil: preliminary studies.
Odim
Mendes Jr, DGE/CEA/INPE, odim@dge.inpe.br
(Presenting)
Margarete
Oliveira
Domingues, LAC/CTE/INPE, margarete@lac.inpe.br
Chou
Sin
Chan, DMD/CPTEC/INPE, chou@cptec.inpe.br
Cesar
A. A.
Beneti, Simepar, beneti@simepar.br
The understanding of the atmospheric thermodynamics is an important tool to forecast thunderstorm activities related to frontal, mesoscale and local convection events. The atmospheric electrical discharges help to monitor some hidden features of the instantaneous physical development of the thunderstorms. In this work two datasets of intensive campaigns are used to analyze the thermo-electrodynamical aspects in the Pantanal Sul Matogrossense region. More than 100 radiosondes were launched, about four radiosondes per day. Usually, there is a lack of atmospheric profile information in this region. This experiment were performed in two differents atmospheric seasons: (1) in September 1999 � in a transition season, and (2) in February 2002 - in a Summer season. In both cases, some cold front passages by this region were identified and in the summer mesosacle and local convection also were organized. This work studies these events in a thermodynamical and electrodynamical aspects using RIDAT stroke data, these radiosondes dataset, GOES-8 images, forecast model datasets, and calculated stability indices and critical isotherm position cloud development. Results on lightning polarity were also discussed related to the events, among other parameters This detailed knowledge could help the engineering purposes and meteorological monitoring in a several ways, specially nowcasting.
Submetido por Margarete Oliveira Domingues em 18-MAR-2004