气候变化领域集成服务门户(CCPortal): Spring Hydroclimate Reconstruction on the South-Central Tibetan Plateau Inferred From Juniperus Pingii Var. Wilsonii Shrub Rings Since 1605

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DOI	10.1029/2020GL087707
	Spring Hydroclimate Reconstruction on the South-Central Tibetan Plateau Inferred From Juniperus Pingii Var. Wilsonii Shrub Rings Since 1605
	Lu, Xiaoming; Huang, Ru; Wang, Yafeng; Zhang, Baoqing; Zhu, Haifeng; Camarero, J. Julio; Liang, Eryuan
通讯作者	Liang, EY (通讯作者)
发表日期	2020
ISSN	0094-8276
EISSN	1944-8007
卷号	47 期号:12
英文摘要	Alpine regions on the Tibetan Plateau are sensitive to climate change, however, little is known about their long-term hydroclimate variability due to short and few instrumental records. Alpine shrub provides a rare opportunity to reconstruct past high-resolution hydroclimate conditions. Here, we used living and dead juniper shrubs (Juniperus pingii var. wilsonii) to develop a 537-year ring width chronology nearby the Nam Co Lake (4,725 m a.s.l.). The chronology explained 46% of variance in May-June Standardized Moisture Anomaly Index (SZI) in the period from 1970 to 2010. We reconstructed May-June SZI since 1605. The reconstructed SZI matched well with several tree-ring based moisture or drought reconstructions for the Tibetan Plateau. In particular, two long dry May-June periods of 1637-1683 and 1708-1785 during the Little Ice Age (LIA) implied that long-term cold temperature tends to slow down hydrological cycle in the margin areas of the Indian summer monsoon. Plain Language Summary As the Third Pole, the Tibetan Plateau is a core region for global change studies given that it is warming at twice the global average rate. The central Tibetan Plateau with an elevation above 4,500 m a.s.l. is characterized by extremely cold and dry treeless environment. However, very few alpine shrub species there provide a rare opportunity to retrieve changes of alpine ecosystem by shrub-ring analysis. In spite of their small basal diameters (mean of 12 cm), we established a 537-year standard shrub ring chronology by crossdating living and dead Wilson juniper shrubs sampled above 4,740 m a.s.l. on the central Tibetan Plateau. It is, to date, one of the world's longest shrub-ring chronologies. Shrub-ring chronology from 1605 to 2010 was then used to reconstruct mean May-June drought severity (Standardized Moisture Anomaly Index). Two long-term dry spring periods (1637-1683 and 1708-1785) occurred during the Little Ice Age (LIA), implying that cold temperature slows down hydrological cycle. This study highlights the importance of alpine juniper shrubs in understanding hydrological cycle in dry, continental alpine treeless areas.
关键词	DWARF SHRUBS MONSOON SUMMER CHRONOLOGY REGION
英文关键词	dendrochronology; alpine shrub; high elevation; drought; reconstruction; Tibetan plateau
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000551464800016
来源期刊	GEOPHYSICAL RESEARCH LETTERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259992
推荐引用方式 GB/T 7714	Lu, Xiaoming,Huang, Ru,Wang, Yafeng,et al. Spring Hydroclimate Reconstruction on the South-Central Tibetan Plateau Inferred From Juniperus Pingii Var. Wilsonii Shrub Rings Since 1605[J]. 中国科学院青藏高原研究所,2020,47(12).
APA	Lu, Xiaoming.,Huang, Ru.,Wang, Yafeng.,Zhang, Baoqing.,Zhu, Haifeng.,...&Liang, Eryuan.(2020).Spring Hydroclimate Reconstruction on the South-Central Tibetan Plateau Inferred From Juniperus Pingii Var. Wilsonii Shrub Rings Since 1605.GEOPHYSICAL RESEARCH LETTERS,47(12).
MLA	Lu, Xiaoming,et al."Spring Hydroclimate Reconstruction on the South-Central Tibetan Plateau Inferred From Juniperus Pingii Var. Wilsonii Shrub Rings Since 1605".GEOPHYSICAL RESEARCH LETTERS 47.12(2020).