Análise espaço-temporal das chuvas persistentes na região do Parque Estadual do Rio Doce – PERD (2005 A 2015).

With this work was made a space-time analysis of the persistent rains that occurred in the region of the Rio Doce State Park (PERD), influenced by the Convergence Zone of Moisture (ZCOU) and South American Convergence Zone (ZCAS). These atmospheric systems are the main triggers of persistent rains in Minas Gerais and consequently in PERD region. In order to identify the days of occurrence and the number of ZCAS and ZCOU events, we used the CLIMANALYSIS and AGROCLIMATOLOGICAL bulletins from 2005 to 2015, where 112 (one hundred and twelve) episodes of ZCAS and 20 episodes of ZCOU were identified and analyzed which were classified in a period of ten days. For the analysis of the persistent rains, daily precipitation data were used from the meteorological stations of Timóteo and Caratinga of the National Meteorological Institute (INMET) and the Ipatinga and PERD stations of the Mineiro Institute of Water Management (IGAM), to build charts and maps of a ten day period of precipitation distribution in the micro region. In order to understand the atmospheric pattern that occurred during the occurrence of ZCAS and ZCOU, we used the National Center for Enviroment Prediction (NCEP) data obtained through the CDC / NOAA (Climate Oceanic and Atmospheric Administration) portal of the study, where the atmospheric systems were identified in the levels 200 hPa and 850 hPa that influence in the formation and positioning of the ZCAS and ZCOU, in order to understand the performance of the main atmospheric patterns triggers of these rains are related to the atmospheric dynamics typical of ZCAS, established by Quadro (1994), and ZCOU by Sacramento Neto et al. (2010). Finally, a survey was carried out in the region's newspapers and on the Civil Defense Web site, where it interrelated with the occurrence of ZCAS and the disturbances caused by rains in the PERD region, so this relationship answers Lucas (2007) questions about ZCAS cause persistent rains in the eastern region and, however, disturbances for the population. It was found out that 72% of ZCAS events had a durability of up to 6 (six) days of occurrence and that ZCAS events with more than 11 (eleven) days of durability are rare. In relation to ZCOU, episodes of 3 (three) days that also cause disorders are common, but because their period of performance is short it did not analyze their impacts in the PERD region. It was found out a variation in the number of episodes of SACZ during the analyzed years that can be related to teleconnections as described by Chaves and Nobre (2004) and El Niño as described by Quadro (1994).