Meteorological Systems Influences Rainfall in Seropédica.

Abstract

from Seropédica were related to synoptic systems and El Niño Southern Oscillation episodes (ENSO). Evaluation was divided into average, monthly, seasonal and annual. Synoptic data are from Climanálise from 1996 to 2012. Descriptive statistics and non-parametric tests (Mann-Kendall (MK), Pettitt and Sen Method (Se)) were applied to time series from Climanálise. The identified average characteristics showed high interannual and intraseasonal variability of synoptic systems, followed by the interaction between local and mesoscale systems in the rainfall regime. Seasonally, spring (38.06%) and summer (30.35%) were higher than autumn (20.91%) and winter (10.68%). The highest average accumulated monthly was observed in the joint occurrence of SACZ/ MCZ and FS from November to January period, followed by the influence of ENSO episodes in Seropédica. FS occurrences decreased in 2005, while in 2003 there was an increased SACZ/MCZ. MK test results considering α = 5% showed that there is Significant Increasing Trend (SIT) in SACZ/MCZ (Z > 2.25) and Significant Decreasing Trend (SDT) of FS (Z < 3.68) in Rio de Janeiro. Statistical identified trends and critical periods of synoptic systems.