DOI: 10.1016/j.gloplacha.2015.01.014
论文题名: Tree-ring δ18O in African mahogany (Entandrophragma utile) records regional precipitation and can be used for climate reconstructions
作者: Van der Sleen P. ; Groenendijk P. ; Zuidema P.A.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2015
卷: 127 起始页码: 58
结束页码: 66
语种: 英语
英文关键词: Cameroon
; Climate reconstruction
; Entandrophragma utile
; Oxygen stable isotopes
; Rainfall variability
; Tree rings
Scopus关键词: Climate change
; Forestry
; Isotopes
; Oxygen
; Precipitation (meteorology)
; Surface waters
; Trees (mathematics)
; Cameroon
; Climate reconstruction
; Entandrophragma utile
; Oxygen stable isotopes
; Rainfall variability
; Tree rings
; O rings
; climate change
; deciduous forest
; dendrochronology
; oxygen isotope
; paleoclimate
; precipitation (climatology)
; proxy climate record
; rainfall
; reconstruction
; stable isotope
; tree ring
; Central Africa
; Climates
; Drought
; Isotopes
; Precipitation
; Seasonal Variation
; Cameroon
; Entandrophragma utile
; Swietenia
英文摘要: The availability of instrumental climate data in West and Central Africa is very restricted, both in space and time. This limits the understanding of the regional climate system and the monitoring of climate change and causes a need for proxies that allow the reconstruction of paleoclimatic variability. Here we show that oxygen isotope values (δ18O) in tree rings of Entandrophragma utile from North-western Cameroon correlate to precipitation on a regional to sub-continental scale (1930-2009). All found correlations were negative, following the proposed recording of the 'amount effect' by trees in the tropics. The capacity of E. utile to record the variability of regional precipitation is also confirmed by the significant correlation of tree-ring δ18O with river discharge data (1944-1983), outgoing longwave radiation (a proxy for cloud cover; 1974-2011) and sea surface salinity in the Gulf of Guinea (1950-2011). Furthermore, the high values in the δ18O chronology from 1970 onwards coincide with the Sahel drought period. Given that E. utile presents clear annual growth rings, has a wide-spread distribution in tropical Africa and is long lived (>250years), we argue that the analysis of oxygen isotopes in growth rings of this species is a promising tool for the study of paleoclimatic variability during the last centuries in West and Central Africa. © 2014 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84922349725&doi=10.1016%2fj.gloplacha.2015.01.014&partnerID=40&md5=226c881fbd8a509203bf23c93aee1b85
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11548
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Forest Ecology and Management Group, Wageningen University, Droevendaalsesteeg 3, 6708 PB, Wageningen, Netherlands
Recommended Citation:
Van der Sleen P.,Groenendijk P.,Zuidema P.A.. Tree-ring δ18O in African mahogany (Entandrophragma utile) records regional precipitation and can be used for climate reconstructions[J]. Global and Planetary Change,2015-01-01,127.