A recent study led by Eduardo Maeda is featured at the Faculty of Science research news: http://www.helsinki.fi/facultyofscience/research/news/2015/amazon.html

The study combines satellite data and hydrological measurements for studying the consequences of extreme climatic events in the Amazon forest. “The researchers fear that, if climate scenarios are proven right, a permanent change in the western Amazon may start to take place within 10 years.”

See also:
Article in Geophysical Research Letters, 16.9.2015, Disruption of hydroecological equilibrium in southwest Amazon mediated by drought.