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    The complex influence of ENSO on droughts in Ecuador

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    Type
    Article
    Authors
    Vicente-Serrano, S. M.
    Aguilar, E.
    Martínez, R.
    Martín-Hernández, N.
    Azorin-Molina, C.
    Sanchez-Lorenzo, A.
    El Kenawy, Ahmed M. cc
    Tomás-Burguera, M.
    Moran-Tejeda, E.
    López-Moreno, J. I.
    Revuelto, J.
    Beguería, S.
    Nieto, J. J.
    Drumond, A.
    Gimeno, L.
    Nieto, R.
    KAUST Department
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2016-03-26
    Online Publication Date
    2016-03-26
    Print Publication Date
    2017-01
    Permanent link to this record
    http://hdl.handle.net/10754/621806
    
    Metadata
    Show full item record
    Abstract
    In this study, we analyzed the influence of El Niño–Southern Oscillation (ENSO) on the spatio-temporal variability of droughts in Ecuador for a 48-year period (1965–2012). Droughts were quantified from 22 high-quality and homogenized time series of precipitation and air temperature by means of the Standardized Precipitation Evapotranspiration Index. In addition, the propagation of two different ENSO indices (El Niño 3.4 and El Niño 1 + 2 indices) and other atmospheric circulation processes (e.g., vertical velocity) on different time-scales of drought severity were investigated. The results showed a very complex influence of ENSO on drought behavior across Ecuador, with two regional patterns in the evolution of droughts: (1) the Andean chain with no changes in drought severity, and (2) the Western plains with less severe and frequent droughts. We also detected that drought variability in the Andes mountains is explained by the El Niño 3.4 index [sea surface temperature (SST) anomalies in the central Pacific], whereas the Western plains are much more driven by El Niño 1 + 2 index (SST anomalies in the eastern Pacific). Moreover, it was also observed that El Niño and La Niña phases enhance droughts in the Andes and Western plains regions, respectively. The results of this work could be crucial for predicting and monitoring drought variability and intensity in Ecuador. © 2016 Springer-Verlag Berlin Heidelberg
    Citation
    Vicente-Serrano SM, Aguilar E, Martínez R, Martín-Hernández N, Azorin-Molina C, et al. (2016) The complex influence of ENSO on droughts in Ecuador. Climate Dynamics. Available: http://dx.doi.org/10.1007/s00382-016-3082-y.
    Sponsors
    European Commission[LIFE12 ENV/ES/000536]
    Ministerio de Economía y Competitividad[CGL2014-517221-REDT, CGL2011-27574-CO2-02, CGL2014-52135-C03-01]
    CSIC[I-COOP H2O 2013CD0006]
    Publisher
    Springer Nature
    Journal
    Climate Dynamics
    DOI
    10.1007/s00382-016-3082-y
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00382-016-3082-y
    Scopus Count
    Collections
    Articles; Water Desalination and Reuse Research Center (WDRC)

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