DOI: 10.1016/j.foreco.2015.01.018
Scopus记录号: 2-s2.0-84923050881
论文题名: Relationships between climate variability and radial growth of Nothofagus pumilio near altitudinal treeline in the Andes of northern Patagonia, Chile
作者: Álvarez C. ; Veblen T.T. ; Christie D.A. ; González-Reyes T.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 342 起始页码: 112
结束页码: 121
语种: 英语
英文关键词: Antarctic Oscillation
; El Niño-Southern Oscillation
; Nothofagus pumilio
; Tree growth
; Treeline
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Climate change
; Climatology
; Global warming
; Nickel
; Oceanography
; Surface waters
; Antarctic oscillation
; Nothofagus
; Southern oscillation
; Tree growth
; Treeline
; Forestry
; annual variation
; chronology
; deciduous tree
; El Nino-Southern Oscillation
; global warming
; growing season
; growth rate
; sea surface temperature
; tree ring
; treeline
; Growth
; Oscillation
; Trees
; Patagonia
; Nothofagus pumilio
英文摘要: Global warming is expected to enhance radial tree growth at alpine treeline sites worldwide. We developed a well-replicated tree-ring chronology from Nothofagus pumilio near treeline in a high precipitation climate on Choshuenco Volcano (40°S) in Chile to examine: (a) variation in tree radial growth in relation to interannual climatic variability; and (b) relationships of radial growth to variability in El Niño Southern Oscillation (ENSO) and the Antarctic Oscillation (AAO) at interannual and decadal time scales. A tree-ring chronology based on 99 tree-ring series from 80 N. pumilio trees near treeline showed a high series intercorrelation (0.48) indicating a strong common environmental signal. Radial growth is negatively correlated with precipitation in late spring (November-December). Temperature and tree growth are positively correlated during late spring and early summer (November-January). Interannual variability in both seasonal climate and in tree growth is strongly teleconnected to ENSO and AAO variability. Radial growth of N. pumilio in this humid high-elevation forest does not show a positive trend over the past half century as predicted from global treeline theory and broadscale warming in the Patagonian-Andean region. Instead, tree growth increased sharply from the 1960s to a peak in the early 1980s but subsequently declined for c. 30. years to its lowest level in >100. years. The shift to higher radial growth after c. 1976 coincides with a shift towards warmer sea surface temperatures in the tropical Pacific which in turn are associated with warmer growing season temperatures. The decline in tree growth since the mid-1990s is coincident with the increasingly positive phase of the AAO and high spring precipitation periods associated with El Niño conditions. The recent shift towards reduced growth of N. pumilio at this humid high-elevation site coincident with rising AAO mirrors the reduced tree growth beginning in the 1960s for trees growing in relatively xeric, lower elevation sites throughout the Patagonian-Andean region. The current study indicates that N. pumilio growth response in humid high-elevation environments to recent broad-scale warming has been non-linear, and that AAO and ENSO are key climatic forcings of tree growth variability. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65526
Appears in Collections: 影响、适应和脆弱性
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作者单位: Biogeography Lab, Department of Geography, University of Colorado, Boulder, United States; Laboratorio de Dendrocronología y Cambio Global, Instituto de Conservación Biodiversidad y Territorio, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Valdivia, Chile; Center for Climate and Resilience Research (CR), Chile; Departamento de Geología, Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Santiago, Chile
Recommended Citation:
Álvarez C.,Veblen T.T.,Christie D.A.,et al. Relationships between climate variability and radial growth of Nothofagus pumilio near altitudinal treeline in the Andes of northern Patagonia, Chile[J]. Forest Ecology and Management,2015-01-01,342