Semestral Journal of Centro Argentino de Meteorólogos, which is published  since 1970 and serves on the Core of Argentine Scientific Journals since 2005. Meteorologica publishes original papers in the field of atmospheric sciences and oceanography.

Registration number of intellectual property: RL-2018-42420861-APN-DNDA#MJ

ISSN 1850-468X

TEMPORAL VARIABILITY OF DAILY CONCENTRATION OF PRECIPITATION IN ARGENTINA

María Paula Llano

Manuscrito recibido el 1 de julio de 2020, en su versión final el 30 de agosto de 2020

ABSTRACT

In the present study, the spatial and temporal behaviour of daily rainfall is analyzed using the daily rainfall concentration index with a resolution of 1, 5 and 10 millimetres for 24 meteorological stations in the period 1961-2018. The index calculated with a resolution of 1 mm takes values between 0.58 and 0.67, without a defined pattern of spatial behaviour. The CI (5 and 10 mm) decrease and a spatial north-south gradient become noticeable. Analyzing the trends, the number of stations with significant negative trends is similar to positive ones, however, in magnitude, positive ones are higher on average. This increase in the concentration of precipitation could become a risk depending on the evolution of the associated precipitation.