DOI: 10.1002/joc.5186
论文题名: The first 300-year streamflow reconstruction of a high-elevation river in Chile using tree rings
作者: Barria P. ; Peel M.C. ; Walsh K.J.E. ; Muñoz A.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 1 起始页码: 436
结束页码: 451
语种: 英语
英文关键词: high-elevation hydrology
; multi-decadal variability
; runoff reconstruction
Scopus关键词: Catchments
; Climate change
; Digital storage
; Drought
; Forestry
; Melting
; Stream flow
; Water supply
; Decadal variability
; High elevation
; Meteorological station
; Negative correlation
; Pacific decadal oscillation
; Positive correlations
; Southern Annular Mode
; Tree-ring chronologies
; Runoff
; chronology
; decadal variation
; hydrology
; reconstruction
; river
; runoff
; streamflow
; tree ring
; Chile
; Araucaria araucana
英文摘要: In central Chile, increasing demand for water and decreasing runoff volumes due to drier conditions have placed catchments in this zone under water stress. However, scarcity of observed data records increases the difficulty of planning future water supply. Instrumental records suggest a reduction in streamflow over the last 56 years. However, this change is not statistically significant and the lack of meteorological stations with long records in this mountainous region hampers a deeper analysis, motivating the use of tree rings to analyse whether these changes are part of a long-term trend. This work represents the first high-elevation runoff reconstruction in Chile using 300 years of tree ring chronologies of Araucaria araucana and Astroceudrus chilensis. The upper part of Biobío river melting season runoff (October–March) and pluvial season runoff (April–September) was reconstructed and analysed to investigate the influence of large-scale climatic drivers on runoff generation, current drought trends and to improve the understanding of climate variability in this region. We obtained positive correlations between the 20-year moving average of reconstructed pluvial season runoff and reconstructed Pacific Decadal Oscillation (PDO), which is indicative of multi-decadal variability. We also found a negative correlation between the 11-year moving average of reconstructed melting season runoff and the PDO and positive correlations with the Southern Annular Mode (SAM). Important differences in the runoff variability of the upper and the lower part of the catchment were identified which are in part led by the influence of the large-scale climatic features that drive runoff generation in both regions. We found that the changes observed in the instrumental records are part of multi-decadal cycles led by the PDO and SAM for pluvial season runoff and melting season runoff, respectively. © 2017 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117159
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth Sciences, University of MelbourneVIC, Australia; Centre for Climate and Resilience Research (CR)2, Santiago, Chile; Department of Infrastructure Engineering, University of MelbourneVIC, Australia; Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
Recommended Citation:
Barria P.,Peel M.C.,Walsh K.J.E.,et al. The first 300-year streamflow reconstruction of a high-elevation river in Chile using tree rings[J]. International Journal of Climatology,2018-01-01,38(1)