Pablo SARRICOLEA, Universidad de Chile, Chile
Hugo ROMERO ARAVENA, Universidad de Chile, Chile
Beatriz FUNATSU, University of Nantes, France
Óliver MESEGUER-RUIZ, Universidad de Tarapacá, Chile
Roberto SERRANO-NOTIVOLI, Universidad Autonoma de Madrid, Spain
An analysis of precipitation extremes indexes is performed for the Altiplanic region of Antofagasta (21°S to 24°S), which is one of the areas most pressured by mining activity in Chile. The data used came from the daily database of the General Water Directorate (DGA) and the Chilean Meteorological Directorate (DMC), reaching a total of 35 stations between the years 1981 and 2017, available in the Chile Climate Explorer (http://explorador.cr2.cl) of the Climate and Resilience Research Center. All data were subjected to a daily quality control, with the elimination of suspicious values, outliers and suspicious dry/wet days. After this step, precipitation data were estimated for all missing days at each station. Both processes were performed with the R package reddPrec. In total, six indices from the Expert Team on Climate Change Detection (ETCCD) and Indices were calculated: Rx5day (Max 5-day precipitation), RR (Wet days), SDII (Simple daily intensity), CDD (Maximum number of consecutive dry), CWD (Maximum number of consecutive wet days) and R99p (Extremely wet days). The results reveal mostly non-significant trends, but the signal tends to an increase of CDD and a decrease of CWD and RR. It was not possible to find trends of change in extreme precipitation, so it is concluded for this area, the need for longer series and with better continuity of data.
Mots clés : Precipitation|Chile|Wet days|R package reddPrec|ETCCD
A105384PS