DOI: 10.5194/cp-11-327-2015
Scopus记录号: 2-s2.0-84923647766
论文题名: Variability of summer humidity during the past 800 years on the eastern Tibetan Plateau inferred from δ18O of tree-ring cellulose
作者: Wernicke J. ; Grießinger J. ; Hochreuther P. ; Braüning A.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2015
卷: 11, 期: 2 起始页码: 327
结束页码: 337
语种: 英语
Scopus关键词: biochronology
; cellulose
; coniferous tree
; humidity
; Little Ice Age
; oxygen isotope
; paleoenvironment
; reconstruction
; relative humidity
; summer
; tree ring
; troposphere
; China
; Qinghai-Xizang Plateau
; Xizang
; Juniperus
英文摘要: We present an 800-year Î18O chronology from the eastern part of the Tibetan Plateau (TP). The chronology dates back to AD 1193 and was sampled in AD 1996 from living Juniperus tibetic trees. This first long-term tree-ring-based Î18O chronology for eastern Tibet provides a reliable archive for hydroclimatic reconstructions. Highly significant correlations were obtained with hydroclimatic variables (relative humidity, vapour pressure, and precipitation) during the summer season. We applied a linear transfer model to reconstruct summer season relative humidity variations over the past 800 years. More moist conditions prevailed during the termination of the Medieval Warm Period while a systematic shift during the Little Ice Age is not detectable. A distinct trend towards more dry conditions since the 1870s is apparent. The moisture decline weakened around the 1950s but still shows a negative trend. The mid-19th century humidity decrease is in good accordance with several multiproxy hydroclimate reconstructions for south Tibet. However, the pronounced summer relative humidity decline is stronger on the central and eastern TP. Furthermore, the relative humidity at our study site is significantly linked to the relative humidity at large parts of the TP. Therefore, we deduce that the reconstructed relative humidity is mostly controlled by local and mesoscale climatic drivers, although significant connections to the higher troposphere of west-central Asia were observed. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49170
Appears in Collections: 气候变化与战略
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Recommended Citation:
Wernicke J.,Grießinger J.,Hochreuther P.,et al. Variability of summer humidity during the past 800 years on the eastern Tibetan Plateau inferred from δ18O of tree-ring cellulose[J]. Climate of the Past,2015-01-01,11(2)