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Ricardo Trigo      
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Ricardo Trigo published an article in January 2019.
Top co-authors See all
José Vaquero

224 shared publications

Instituto Universitario de Investigación del Agua, Cambio Climático y Sostenibilidad (IACYS), Universidad de Extremadura, Badajoz, Spain

Luis Gimeno

143 shared publications

Environmental Physics Laboratory (EPhysLab), Facultade de Ciencias, Universidad de Vigo, Ourense 32004, Spain

Raquel Nieto

119 shared publications

Environmental Physics Laboratory (EPhysLab), Facultade de Ciencias, Universidad de Vigo, Ourense 32004, Spain

Alexandre Ramos

56 shared publications

Instituto Dom Luiz, Universidade de Lisboa, 1749-016 Lisboa, Portugal

José Luís Zêzere

56 shared publications

Institute of Geography and Spatial Planning – Universidade de Lisboa, Rua Branca Edmée Marques, Cidade Universitária, Lisbon, Portugal

Publication Record
Distribution of Articles published per year 
(1999 - 2019)
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Article 0 Reads 0 Citations The synergy between drought and extremely hot summers in the Mediterranean Ana Russo, C M Gouveia, Emanuel Dutra, Pedro Mm Soares, Rica... Published: 17 January 2019
Environmental Research Letters, doi: 10.1088/1748-9326/aaf09e
DOI See at publisher website ABS Show/hide abstract
In the last years a large number of weather driven extreme events has occurred worldwide with unprecedented socio-economic impacts and are expected to increase, in both frequency and intensity, under future global-warming conditions. In this context early identification and predictability of such events are paramount as they mostly affect several socio-economic activities. Despite the effort in monitoring and evaluation of these extreme events, a quantitative assessment of their interaction is still a challenge. We propose to analyze if the occurrence of extremely hot days/nights in the summer is preceded by drought events in spring and early summer throughout the Mediterranean area. This was investigated by correlating the number of hot days and nights in the regions' hottest months with a drought indicator on the prior months. Drought characterization was performed using both the Standardized Precipitation Evaporation Index (SPEI) and the Standardized Precipitation Index (SPI) for the 3-, 6- and 9-months time scales, considering the period 1980-2014 with a spatial resolution of 0.5o. The number of hot days and nights per month (NHD and NHN, respectively) is determined for the same period and spatial resolution. Results show that the most frequent hottest months for the Mediterranean region occur in July and August. Most regions exhibit statistically significant negative correlations, i.e. high (low) NHD/NHN following negative (positive) SPEI/SPI values, and thus a potential for NHD/NHN early warning. This analysis allowed to identify the Iberian Peninsula, northern Italy, northern Africa and the Balkans as the main hotspots of predictability of extreme hot temperatures in the summer preceded by the occurrence of drought events in the spring or early summer.
Article 0 Reads 0 Citations The response of piezometric levels in Portugal to NAO, EA, and SCAND climate patterns Maria C. Neves, Sonia Jerez, Ricardo M. Trigo Published: 01 January 2019
Journal of Hydrology, doi: 10.1016/j.jhydrol.2018.11.054
DOI See at publisher website
Article 1 Read 2 Citations The ‘Day Zero’ Cape Town drought and the poleward migration of moisture corridors Pedro M Sousa, Ross C Blamey, Chris J C Reason, Alexandre M.... Published: 17 December 2018
Environmental Research Letters, doi: 10.1088/1748-9326/aaebc7
DOI See at publisher website ABS Show/hide abstract
Since 2015 the greater Cape Town area (~3.7 million people) has been experiencing the worst drought of the last century. The combined effect of this prolonged dry period with an ever-growing demand for water culminated in the widely publicized "Day Zero" water crisis. Here we show how: i) consecutive significant decreases in rainfall during the last three winters led to the current water crisis; ii) the 2015-2017 record breaking drought was driven by a poleward shift of the Southern Hemisphere moisture corridor; iii) a displacement of the jet-stream and South Atlantic storm-track has imposed significantly drier conditions to this region. Decreasing local rainfall trends are consistent with an expansion of the semi-permanent South Atlantic High Pressure, and reflected in the prevalence of the positive phase of the Southern Annular Mode. Large-scale forcing mechanisms reveal the intensification and migration of subtropical anticyclones towards the mid-latitudes, highlighting the link between these circulation responses and the record warm years during 2015-2017 at the global scale.
Article 0 Reads 0 Citations Spatial assessment of the performance of multiple high‐resolution satellite‐based precipitation datasets over the Middle... Ahmed M. El Kenawy, Matthew F. McCabe, Juan I. Lopez‐Moreno,... Published: 12 December 2018
International Journal of Climatology, doi: 10.1002/joc.5968
DOI See at publisher website
BOOK-CHAPTER 0 Reads 0 Citations Circulation weather types and their influence on the fire regime in Portugal Carlos C. Dacamara, Ricardo M. Trigo Published: 12 November 2018
Advances in forest fire research 2018, doi: 10.14195/978-989-26-16-506_40
DOI See at publisher website
Article 0 Reads 0 Citations Earlier awareness of extreme winter precipitation across the western Iberian Peninsula David A. Lavers, David S. Richardson, Alexandre M. Ramos, Er... Published: 24 September 2018
Meteorological Applications, doi: 10.1002/met.1727
DOI See at publisher website ABS Show/hide abstract
Extreme winter precipitation across the western Iberian Peninsula is frequently connected to atmospheric rivers, which are bands of intense water vapour transport (integrated vapour transport, IVT). Recent research over Western Europe has shown that by using the IVT forecasts in the form of the extreme forecast index (EFI), a tool that identifies anomalous conditions, it is possible to provide earlier awareness of extreme precipitation events than by using the precipitation EFI directly. The aim of the present paper is to assess these findings further by identifying the regions of Iberia where such IVT forecasts are skilful and for what lead times. Employing the EFI on the European Centre for Medium‐Range Weather Forecasts (ECMWF) Integrated Forecasting System ensemble for winters 2015/2016 and 2016/2017 and using high‐density daily surface precipitation observations, the IVT EFI is shown to have slightly more skill (than the precipitation EFI) in discriminating extreme precipitation anomalies across the western Iberian Peninsula (Portugal and northwestern Spain) from forecast day 11 onwards. The reasoning is that the higher IVT predictability means that the IVT EFI is more able to detect the approximate location of extreme events at earlier lead times than the precipitation EFI. In contrast, for shorter forecast lead times, the precipitation EFI is more skilful. Also, when considering the entire Iberian Peninsula, the precipitation EFI is more skilful and more appropriate to monitor for potential extremes even at longer lead times.