Next Article in Journal
A Study of the Relations between Soil Moisture, Soil Temperatures and Surface Temperatures Using ARM Observations and Offline CLM4 Simulations
Next Article in Special Issue
The Impact of the East Atlantic/Western Russia Pattern on the Hydroclimatology of Europe from Mid-Winter to Late Spring
Previous Article in Journal
Rainfall Distributions in Sri Lanka in Time and Space: An Analysis Based on Daily Rainfall Data
Previous Article in Special Issue
Spatial-Temporal Variation and Prediction of Rainfall in Northeastern Nigeria
Article Menu

Export Article

Open AccessArticle
Climate 2014, 2(4), 264-278; doi:10.3390/cli2040264

Trends and Spatial Patterns of Drought Affected Area in Southern South America

1
Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (CCT-Mendoza/CONICET), Av. Ruiz Leal s/n, Parque General San Martín, Mendoza 5500, Argentina
2
Unidad Mixta Internacional—Instituto Franco-Argentino para el Estudio del Clima y sus Impactos (UMI-IFAECI), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Pabellón 2, 2° Piso—Ciudad Universitaria, Buenos Aires C1428EGA, Argentina
3
Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Pabellón 2, 2° Piso—Ciudad Universitaria, Buenos Aires C1428EGA, Argentina
*
Author to whom correspondence should be addressed.
Received: 10 April 2014 / Revised: 5 September 2014 / Accepted: 17 September 2014 / Published: 26 September 2014
(This article belongs to the Special Issue Changes in Precipitation and Impacts on Regional Water Resources)
View Full-Text   |   Download PDF [3134 KB, uploaded 26 September 2014]   |  

Abstract

Based on 56 rainfall stations, which cover the period 1961–2008, we analyzed the presence of trends in the drought-affected area over southern South America (SSA) at different time scales. In order to define drought conditions, we used the standardized precipitation index, which was calculated on time scales of 1, 3, 6, 9 and 12 months. The trends were estimated following both a linear and a non-linear approach. The non-linear approach was based on the residual of the empirical mode decomposition, a recently proposed methodology, which is robust in presence of non-stationary data. This assessment indicates the existence of reversals in the trends of the drought affected, area around the 1990s, from decreasing trends during the first period to increasing trends during the recent period. This is indicative of the existence of a low-frequency variability that modulates regional precipitation patterns at different temporal scales, and warns about possible future consequences in the social and economic sectors if trends towards an increase in the drought affected area continue. View Full-Text
Keywords: standardized precipitation index; drought; trends; spatial patterns; southern South America standardized precipitation index; drought; trends; spatial patterns; southern South America
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Rivera, J.A.; Penalba, O.C. Trends and Spatial Patterns of Drought Affected Area in Southern South America. Climate 2014, 2, 264-278.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Climate EISSN 2225-1154 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top