Cedro (Cedrela angustifolia) and its tree rings. Photograph 2017 by Edilson Requena

Corresponding author: M. Eugenia Ferrero
Email: mferrero@mendoza-conicet.gob.ar
Institution: Laboratorio de Dendrocronología, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), CONICET Mendoza, Argentina.

Contact co-author for tree-ring chronologies details: Edilson J. Requena-Rojas
Email: edilson.requena@gmail.com
Institution: Laboratorio de Dendrocronología, Universidad Continental. Huancayo, Perú.

Contact co-author in the Center for Climate and Resilience Research: Ariel A. Muñoz
Email: ariel.munoz@pucv.cl
Institution: Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.

Data Site Manager: Francisca Muñoz
(CR)2 – Center for Climate and Resilience Research
Email: franmuno@uchile.cl

“Precipitation data from the GPCP (Global Precipitation Climatology Project) provides complete records since 1979 and offers a good representation of rainfall over Peruvian tropical Andes. However, longer records are needed to improve our understanding of rainfall variability and summer monsoon behaviour at various scales”.

“This work presents the first two centuries yearly-resolved precipitation reconstruction for the tropical Andes in Peru, based on tree-ring width chronologies of Cedrela and Juglans species”.

“The annual (November-October) reconstruction expanded the instrumental record back to 1817, explaining 68% of the total variance of precipitation between the 1979-2007 calibration period”.

“The 193-years reconstruction shows the well-documented influence of ENSO on Amazon rainfall and presents a significant multidecadal variation in quasi-cycles of 40 years related to the Atlantic Multidecadal Oscillation (AMO)”.

Yungas montane forests at Mamac, Concepción (Junín), Perú. Photograph 2017 taken by Eva Layme during fieldwork.