气候变化领域集成服务门户(CCPortal): Two Centuries of Hydroclimatic Variability Reconstructed From Tree-Ring Records Over the Amazonian Andes of Peru

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DOI	10.1029/2020JD032565
	Two Centuries of Hydroclimatic Variability Reconstructed From Tree-Ring Records Over the Amazonian Andes of Peru
	Humanes-Fuente V.; Ferrero M.E.; Muñoz A.A.; González-Reyes Á.; Requena-Rojas E.J.; Barichivich J.; Inga J.G.; Layme-Huaman E.T.
发表日期	2020
ISSN	2169897X
卷号	125 期号:18
英文摘要	Almost half of the tributaries of the Amazon River originate in the tropical Andes and support large populations in mountain regions and downstream areas. However, it is difficult to assess hydroclimatic conditions or to evaluate future scenarios due to the scarcity of long, high-quality instrumental records. Data from the Global Precipitation Climatology Project (GPCP) provide a complete record since 1979 and offer a good representation of rainfall over the tropical Andes. Longer records are needed to improve our understanding of rainfall variability and summer monsoon behavior at various scales. We developed the first annually resolved precipitation reconstruction for the tropical Andes in Peru, based on tree-ring chronologies of Cedrela and Juglans species. The annual (November–October) reconstruction extends the short instrumental records back to 1817, explaining 68% of the total variance of precipitation over the 1979–2007 calibration period. The reconstruction reveals the well-documented influence of El Niño-Southern Oscillation (ENSO) on Amazon Rainfall at interannual scales (~19% of total variance) and significant multidecadal variability with alternating periods of about 40 years (~13% of rainfall variability) related to the Atlantic Multidecadal Oscillation (AMO). Both oscillatory modes can explain dry and humid periods observed within the reconstruction and are likely associated with the negative trends of rainfall in the short instrumental records and the increased drought recurrence in recent decades. Our results show that montane tropical tree rings can be used to reconstruct precipitation with exceptionally high fidelity, characterize the interannual to multidecadal variability, and identify remote forcings in the hydroclimate over the Andean Amazon Basin of Peru. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Amazonian montane forests; precipitation reconstruction; SAMS; South America; tree rings; tropical Andes
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185735
作者单位	Laboratorio de Dendrocronología y Estudios Ambientales, Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaiso, Chile; Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, CONICET, Mendoza, Argentina; Centro de Ciencia del Clima y la Resiliencia (CR), Santiago, Chile; Hémera Centro de Observación de la Tierra, Escuela de Ingeniería Forestal, Facultad de Ciencias, Universidad Mayor, Santiago, Chile; Laboratorio de Dendrocronología, Universidad Continental, Huancayo, Peru; Instituto de Conservación, Biodiversidad y Territorio, Universidad Austral de Chile, Valdivia, Chile; Laboratoire des Sciences du Climat et de l'Environnement, IPSL, CNRS/CEA/UVSQ, Gif-sur-Yvette, France; Instituto Nacional de Innovación Agraria, Lima, Peru
推荐引用方式 GB/T 7714	Humanes-Fuente V.,Ferrero M.E.,Muñoz A.A.,et al. Two Centuries of Hydroclimatic Variability Reconstructed From Tree-Ring Records Over the Amazonian Andes of Peru[J],2020,125(18).
APA	Humanes-Fuente V..,Ferrero M.E..,Muñoz A.A..,González-Reyes Á..,Requena-Rojas E.J..,...&Layme-Huaman E.T..(2020).Two Centuries of Hydroclimatic Variability Reconstructed From Tree-Ring Records Over the Amazonian Andes of Peru.Journal of Geophysical Research: Atmospheres,125(18).
MLA	Humanes-Fuente V.,et al."Two Centuries of Hydroclimatic Variability Reconstructed From Tree-Ring Records Over the Amazonian Andes of Peru".Journal of Geophysical Research: Atmospheres 125.18(2020).