Open AccessLinear trend of occurrence and intensity of heavy rainfall events on Northeast Brazil
Author(s) -
de Oliveira Priscilla Teles,
Silva Cláudio Moisés Santos e,
Lima Kellen Carla
Publication year - 2013
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl2.484
Subject(s) - trend analysis , quantile , climatology , environmental science , nonparametric statistics , intensity (physics) , statistics , mathematics , geology , physics , quantum mechanics
A comprehensive dataset of daily rainfall covering the period from 1972 to 2002 was used to compute the climatology and trend of occurrence and intensity of heavy, weak and normal events of rainfall on Northeast Brazil (NEB). For selection of rainfall events, we used the technique of quantiles and the trend was identified using the nonparametric Mann–Kendall test. The heavy events are modulated by La Niña and El Niño occurrences and in general they presented negative trend concerning to number of episodes and positive trend to daily rainfall.