气候变化领域集成服务门户(CCPortal): A multimillennial snow water equivalent reconstruction from giant sequoia tree rings

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DOI	10.1007/s00382-020-05548-0
	A multimillennial snow water equivalent reconstruction from giant sequoia tree rings
	Touchan R.; Black B.; Shamir E.; Hughes M.K.; Meko D.M.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-05-06
英文摘要	The first dendroclimatic reconstruction of May 1 snow water equivalent (SWE) was developed from a Sequoiadendron giganteum regional tree-ring chronology network of 23 sites in central California for the period 90–2012 CE. The reconstruction is based on a significant relationship between May 1 SWE and tree-ring growth and shows climate variability from interannual to intercentennial time scales. A regression-based reconstruction equation explains up to 55% of the variance of SWE for 1940–2012. Split-sample validation supports our use of a reconstruction model based on the full period of reliable observational data (1940–2012). Thresholds for May 1 SWE low (15 percentile) and high (80 percentile) years were selected based on the exploratory scatterplots relationship between observed and reconstructed data for the period 1940–2012. The longest period of consecutive low-SWE years in the reconstruction is 2 years and the frequency of the lowest SWE years is highest during the period 710–809 CE. The longest high-SWE period, defined by consecutive wet years, is 3 years (558–560 CE). SWE and its reconstruction positively correlate with northeastern Pacific sea surface temperatures, the low-frequency variability of which may provide some predictive ability. Ultimately, the instrumental record and reconstruction suggest that unlike other sites in the region, twentieth century SWE variability in these Sequoia groves has remained within historical boundaries and relatively buffered from extremes and severe declines, though this is likely to change in coming decades with potentially negative effects on water availability for these trees. © 2021, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Drought; El Niño Southern Oscillation; Giant sequoia; May 1 SWE; Pacific Decadal Oscillation
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183366
作者单位	Laboratory of Tree‐Ring Research, University of Arizona, Tucson, AZ, United States; Hydrologic Research Center, San Diego, CA, United States
推荐引用方式 GB/T 7714	Touchan R.,Black B.,Shamir E.,et al. A multimillennial snow water equivalent reconstruction from giant sequoia tree rings[J],2021,56(2021-05-06).
APA	Touchan R.,Black B.,Shamir E.,Hughes M.K.,&Meko D.M..(2021).A multimillennial snow water equivalent reconstruction from giant sequoia tree rings.Climate Dynamics,56(2021-05-06).
MLA	Touchan R.,et al."A multimillennial snow water equivalent reconstruction from giant sequoia tree rings".Climate Dynamics 56.2021-05-06(2021).