Termodinâmica da camada limite atmosférica na Amazônia (TECLA): influência dos efeitos locais e dos fenômenos de mesoescala

Abstract

On the purpose of studying the influence of local and synoptic effects over the western Amazonia (Rondônia State) ABL’s thermodynamics above forest and pasture areas, three different seasons were chosen for analyses: Dry season, Wet season and dry to wet transition season. Surface Weather Station’s, radiosonde and satellite data from three different experiments, RBLE-3 (August – 1994), WET AMC/LBA (February – 1999) e DRY TO WETAMC/LBA (October – 2002) were used for the research. The weather conditions during the three experiments were typical, according to the season when each one happened, and no remarkable differences were noticed between the forest and pasture. 45 cases of ABL atypical behavior were found (22 in the forest and 23 in the pasture), which were always related to micrometeorological-scale phenomena, usually strong winds. The method used in this research did not allow us to find direct relationships between the ABL particularities and synoptic-scaled phenomena. The Dry season particularities usually occur in days with strong winds. During the Wet season all the atypical occurrences were in raining days. In the dry to wet season, all the atypical occurrence were also in raining days, furthermore were noticed 3 occurrences of strong wind and 1 of LLJ.