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Título : Tree rings and rainfall in the equatorial amazon
Autor: Granato-Souza, Daniela
Stahle, David W.
Barbosa, Ana Carolina
Feng, Song
Torbenson, Max C. A.
Pereira, Gabriel de Assis
Schöngart, Jochen
Barbosa, Joao Paulo
Griffin, Daniel
Palavras-chave: Equatorial Amazon
Tree rings
Sea surface temperature
El Niño/Southern Oscillation (ENSO)
Publicador: Springer
Data da publicação: 2018
Referência: GRANATO-SOUZA, D. et al. Tree rings and rainfall in the equatorial amazon. Climate Dynamics, [S.l.], 2018.
Abstract: The Amazon basin is a global center of hydroclimatic variability and biodiversity, but there are only eight instrumental rainfall stations with continuous records longer than 80 years in the entire basin, an area nearly the size of the coterminous US. The first long moisture-sensitive tree-ring chronology has been developed in the eastern equatorial Amazon of Brazil based on dendrochronological analysis of Cedrela cross sections cut during sustainable logging operations near the Rio Paru. The Rio Paru chronology dates from 1786 to 2016 and is significantly correlated with instrumental precipitation observations from 1939 to 2016. The strength and spatial scale of the precipitation signal vary during the instrumental period, but the Rio Paru chronology has been used to develop a preliminary reconstruction of February to November rainfall totals from 1786 to 2016. The reconstruction is related to SSTs in the Atlantic and especially the tropical Pacific, similar to the stronger pattern of association computed for the instrumental rainfall data from the eastern Amazon. The tree-ring data estimate extended drought and wet episodes in the mid- to late-nineteenth century, providing a valuable, long-term perspective on the moisture changes expected to emerge over the Amazon in the coming century due to deforestation and anthropogenic climate change.
Idioma: en_US
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