For more info, check page 12 of the INDC submitted to the UNFCCC http://www4.unfccc.int/submissions/INDC/Published%20Documents/Chile/1/INDC%20Chile%20english%20version.pdf
 http://www.cr2.cl/wp-content/uploads/2016/03/Propuesta-contenidos-PANCC-2016-2021-Fase-II-Licitacio%CC%81n.pdf See page 85. Projections for precipitation between 2031 and 2050 show a downward trend of between 5 and 15% between Copiapó and Aysén, with the drop more pronounced in the south, particularly between the Bío Bío watershed and the southern limit of the Los Lagos Region (e.g. the Yelcho watershed).
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Por Patrick Lynch