Air moisture signals in a stable oxygen isotope chronology of dwarf shrubs from the central Tibetan Plateau
文献类型：期刊论文
| 作者 | Wernicke, Jakob2; Stark, Georg2; Wang, Lily1; Griessinger, Jussi2; Brauning, Achim2 |
| 刊名 | ANNALS OF BOTANY
 |
| 出版日期 | 2019-06-28 |
| 卷号 | 124期号:1页码:53-64 |
| 关键词 | Juniperus pingii var. wilsonii dendrochronology climate-growth relations delta O-18 coherence shrub/tree Tibetan Plateau |
| ISSN号 | 0305-7364 |
| DOI | 10.1093/aob/mcz030 |
| 通讯作者 | Wernicke, Jakob(jakob.wernicke@gmail.com) |
| 英文摘要 | Background and Aims Annually resolved biological climate proxies beyond the altitudinal and latitudinal distribution limit of trees are rare. In such regions, several studies have demonstrated that annual growth rings of dwarf shrubs are suitable proxies for palaeoclimatic investigations. In High Asia, the pioneer work of Liang et al. (Liang E, Lu X, Ren P, Li X, Zhu L, Eckstein D, 2012. Annual increments of juniper dwarf shrubs above the tree line on the central Tibetan Plateau: a useful climatic proxy. Annals of Botany 109: 721-728) confirmed the suitability of shrub growth-ring chronologies for palaeoclimatic research. This study presents the first sensitivity study of an annually resolved delta O-18 time series inferred from Wilson juniper (Juniperus pingii var. wilsonii) from the northern shoreline of lake Nam Co (Tibetan Plateau). Methods Based on five individual dwarf shrub discs, a statistically reliable delta O-18 chronology covering the period 1957-2009 was achieved (expressed population signal = 0.80). Spearman's correlation analysis between the delta O-18 chronology and climate variables from different sources was applied. In a first step, the suitability of various climate data was evaluated. Key Results Examinations of climate-proxy relationships revealed significant negative correlations between the delta O-18 shrub chronology and summer season moisture variability of the previous and current year. In particular, relative humidity of the previous and current vegetation period significantly determined the proxy variability (rho = -0.48, P < 0.01). Furthermore, the delta O-18 variability of the developed shrub chronology significantly coincided with a nearby tree-ring delta O-18 chronology of the same genus (r = 0.62, P < 0.01). Conclusions The delta O-18 shrub chronology reliably recorded humidity variations in the Nam Co region. The chronology was significantly correlated with a nearby moisture-sensitive tree-ring delta O-18 chronology, indicating a common climate signal in the two chronologies. This climate signal was likely determined by moisture variations of the Asian summer monsoon. Local climate effects were superimposed on the supra-regional climate signature of the monsoon circulation. Opposing delta O-18 values between the two chronologies were interpreted as plant-physiological differences during isotopic fractionation processes. |
| WOS关键词 | TREE-RING DELTA-O-18 ; NAM CO ; SNOW DISTRIBUTION ; CLIMATE SIGNALS ; NORTHERN SLOPE ; ALPINE SHRUB ; LEAF WATER ; VARIABILITY ; CELLULOSE ; GROWTH |
| 资助项目 | German Federal Ministry of Education and Research[BMBF: FKZ 03G0811] ; German Research Council[DFG: BR 1895/21] |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000493044300007 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | German Federal Ministry of Education and Research ; German Research Council |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/131727]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wernicke, Jakob |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resource Res, Beijing, Peoples R China 2.Friedrich Alexander Univ Erlangen Nuremberg, Inst Geog, Erlangen, Germany |
| 推荐引用方式 GB/T 7714 | Wernicke, Jakob,Stark, Georg,Wang, Lily,et al. Air moisture signals in a stable oxygen isotope chronology of dwarf shrubs from the central Tibetan Plateau[J]. ANNALS OF BOTANY,2019,124(1):53-64. |
| APA | Wernicke, Jakob,Stark, Georg,Wang, Lily,Griessinger, Jussi,&Brauning, Achim.(2019).Air moisture signals in a stable oxygen isotope chronology of dwarf shrubs from the central Tibetan Plateau.ANNALS OF BOTANY,124(1),53-64. |
| MLA | Wernicke, Jakob,et al."Air moisture signals in a stable oxygen isotope chronology of dwarf shrubs from the central Tibetan Plateau".ANNALS OF BOTANY 124.1(2019):53-64. |
入库方式： OAI收割
来源：地理科学与资源研究所
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