Professor Myneni coauthored a paper in PNAS on the dynamics of Amazon Droughts

in 2013, 2013, Faculty, October-13, Publications, Ranga Myneni
October 22nd, 2013

A paper titled “Increased dry-season length over southern Amazonia in recent decades and its implication for future climate projection” by Fu et al. appeared in an early edition of the journal “Proceedings of the National Academy of Sciences of the United States of America” (PNAS) on Tuesday October 21st, 2013. This paper addresses the question of whether the dry-season length will increase as that will determines the fate of the rainforests over Amazonia and future global atmospheric CO2 concentration. The authors show observationally that the dry-season length over southern Amazonia has increased significantly since 1979. Although the causes for this change are unknown, it resembles the effects of anthropogenic climate change. The global climate models that were presented in the Intergovernmental Panel on Climate Change’s fifth assessment report seem to substantially underestimate the variability of the dry-season length. Such a bias implies that the future change of the dry-season length, and hence the risk of rainforest die-back, may be underestimated by the projections of these models. The paper can be downloaded from

A press release accompanying the publication can be found at