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Jorge Lorenzo-Lacruz   Dr.  University Educator/Researcher 
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Jorge Lorenzo-Lacruz published an article in November 2017.
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Fernando Domínguez-Castro

24 shared publications

Instituto Pirenaico de Ecología, Spanish National Research Council (IPE-CSIC), Campus de Aula Dei, P.O. Box 13034, E-50059 Zaragoza, Spain

Marina Peña-Gallardo

9 shared publications

Instituto Pirenaico de Ecología (IPE-CSIC), 50192 Zaragoza, Spain

Ahmed El Kenawy

7 shared publications

Instituto Pirenaico de Ecología (IPE-CSIC), 50192 Zaragoza, Spain

Mark Svoboda

6 shared publications

University of Nebraska

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CONFERENCE-ARTICLE 9 Reads 0 Citations <strong>Complex spatial and temporal influences of climatic drought time-scales on hydrological droughts in natural basi... Sergio Vicente-Serrano, Marina Peña-Gallardo, Jamie Hannafor... Published: 05 November 2017
First International Electronic Conference on the Hydrological Cycle, doi: 10.3390/CHyCle-2017-04835
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We have analysed the response of hydrological droughts to climatic droughts in different natural basins of United States of America. For this purpose we selected 289 complete series from an initial data set of 702 gauging stations, covering the period between 1940 and 2013. Drainage basins were obtained for each gauging station using a digital terrain model, and climate series (precipitation and the atmospheric evaporative demand) were obtained for each drainage series. A number of topographic, edaphic and remote sensing variables were quantified for each basin. A hydrological drought index (The Standardized Stream Flow Index-SSI) was obtained for each basin and the Standardized Precipitation Evapotranspiration Index (SPEI) was used as a metric of climatic drought severity. Relationship between different SPEI time scales and the SSI was quantified using Pearson’s correlations and the general patterns of response of hydrological droughts to climatic droughts were identified using a principal component analysis. In general there is a response of SSI to short SPEI time-scales but strong seasonality in this response is also found. Coherent geographic patterns were obtained from the analysis and the factors that control the different responses were analysed by means of a predictive discriminant analysis. Independent analysis for three periods (1940-1964, 1965-1989 and 1989-2013) were also performed and showed not important changes in the response of the SSI to the SPEI in the past 65 years.