DOI: 10.1175/JCLI-D-13-00734.1
Scopus记录号: 2-s2.0-84944128252
论文题名: The potential of deriving tree-ring-based field reconstructions of droughts and pluvials over fennoscandia
作者: Seftigen K. ; Cook E.R. ; Linderholm H.W. ; Fuentes M. ; Björklund J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 9 起始页码: 3453
结束页码: 3471
语种: 英语
Scopus关键词: Carbon
; Climate change
; Forestry
; Moisture
; Repair
; Field reconstruction
; Isotope chronologies
; Moisture variability
; Multiproxy approach
; Paleoclimates
; Regional differences
; Spatial correlations
; Spatio-temporal reconstruction
; Trees (mathematics)
; atmospheric moisture
; climate change
; drought
; evapotranspiration
; precipitation (climatology)
; reconstruction
; tree ring
; Fennoscandia
英文摘要: Moisture availability has been identified as one of the most important factors in the context of future climate change. This paper explores the potential of applying a multiproxy approach to dendroclimatology to infer the twentieth-century moisture variability over Fennoscandia. Fields of the warm-season (June-August) standardized precipitation evapotranspiration index (SPEI) were developed from a dense network of precipitation-sensitive annually resolved tree-ring width (TRW), maximum density (MXD), and stable carbon (δ13C) and oxygen (δ18O) isotope chronologies using a point-by-point local regression technique (PPR). Two different approaches were tested for selecting candidate tree-ring predictors of SPEI for each gridpoint reconstruction: a search radiusmethod and a search spatial correlation contourmethod. As confirmed by a range of metrics of reconstruction fidelity, both methods produced reconstructions showing a remarkably high accuracy in a temporal sense, but with some minor regional differences. As a whole, the spatial skill of the reconstructed fields was generally quite good, showing the greatest performance in the central and southern parts of the target region. Lower reconstruction skills were observed in northern part of the study domain. Regional-scale moisture anomalies were best captured by the reconstructions, while local-scale features were not as well represented. The authors speculate that a spatially and temporally varying tree-ring proxy response to temperature and precipitation in the region may cause some uncertainties in a Fennoscandian hydroclimatic reconstruction; this needs further investigation. Overall, this study shows a great potential for making long-term spatiotemporal reconstructions of moisture variability for the Fennoscandian region using tree-ring data. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50500
Appears in Collections: 气候变化事实与影响
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作者单位: Regional Climate Group, Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden; Lamont-Doherty Earth Observatory, Palisades, NY, United States
Recommended Citation:
Seftigen K.,Cook E.R.,Linderholm H.W.,et al. The potential of deriving tree-ring-based field reconstructions of droughts and pluvials over fennoscandia[J]. Journal of Climate,2015-01-01,28(9)