RT Journal Article
T1 Compound hot and dry events in Argentina and their connection to El Niño-Southern Oscillation
A1 López-Ramírez, Agustina
A1 Barrucand, Mariana
A1 Collazo Inglesini, Soledad Maribel
AB This work studies the simultaneous and sequential occurrence of hot and dry months in the summer season in Argentina, north of 40°S, based on three different databases: meteorological stations, a gridded observational dataset and a reanalysis product. The influence of the El Niño-Southern Oscillation (ENSO) over the occurrence of these compound events is specially analysed using a logistic regression model. Monthly maximum temperature and precipitation data are used for the period 1979–2022 in four sub-regions of Argentina: Northwestern Argentina (NOA), Northeastern Argentina (NEA), Cuyo (central-western Argentina) and the Pampas (central-eastern Argentina). Simultaneous hot and dry months and hot months preceded by dry months are the most frequent compound events. The highest frequencies are found in the centre part of the study region and NEA for simultaneous compound events, and in NOA and the Pampas region for sequential ones. In general terms, all datasets show a good representation of the spatio-temporal variability of hot and dry months. The insights of the influence of ENSO on compound events revealed that La Niña enhances the occurrences of hot and dry months throughout the study region, with the exception of NOA, where El Niño conditions promote the occurrence of these events. Based on logistic regression models, we successfully quantify the relationship between ENSO and hot and dry months and demonstrate that ENSO plays a significant role as a driver of compound hot and dry events in the central region, Cuyo, NEA and a portion of the Pampas. This research contributes to the understanding of compound events in Argentina and how they are influenced by major drivers of climate variability providing useful information for the development of a predictive system for such events.
PB Wiley
SN 0899-8418
YR 2024
FD 2024-10-21
LK https://hdl.handle.net/20.500.14352/110059
UL https://hdl.handle.net/20.500.14352/110059
LA eng
NO Lopez-Ramirez, A., Barrucand, M. and Collazo, S. (2024), Compound Hot and Dry Events in Argentina and Their Connection to El Niño-Southern Oscillation. Int J Climatol. https://doi.org/10.1002/joc.8657
NO European Union's Horizon 2020 research and innovation programunder the Marie Skłodowska-Curie grant agreement No 847635(UNA4CAREER).
NO Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación (Argentina)
NO Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina)
NO Universidad de Buenos Aires
NO European Research Council
NO Gobierno de España
NO European Commision
DS Docta Complutense
RD 14 dic 2025