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DOI	10.1029/2020GL089154
	Semiquantitative Estimates of Rainfall Variability During the 8.2 kyr Event in California Using Speleothem Calcium Isotope Ratios
	de Wet C.B.; Erhardt A.M.; Sharp W.D.; Marks N.E.; Bradbury H.J.; Turchyn A.V.; Xu Y.; Oster J.L.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:3
英文摘要	A multiproxy record from a fast-growing stalagmite reveals variable hydroclimate on the California coast across the 8.2 kyr event and a precursor event likely caused by initial drainage of proglacial Lake Agassiz. Using speleothem δ44Ca, we develop the first semiquantitative estimates of paleorainfall variability for California through calibration with measurements of the modern climate and cave environment. We find that the magnitude of rainfall variability during the 8.2 kyr event approached the multiyear variability observable in the recent past (1950–2019) and the magnitude of variability during the precursor event likely exceeded this range. Additionally, we observe other instances of multidecadal variability comparable in magnitude to the precursor event during the record. Our work suggests that speleothem calcium isotope ratios are a powerful semiquantitative means to reconstruct paleorainfall, although numerous factors must be assessed in each cave system before applying this approach. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Calcium; Isotopes; Rain; Calcium isotopes; California; Cave system; Measurements of; Multidecadal variability; Multiproxy records; Proglacial lakes; Rainfall variability; Glacial geology
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169138
作者单位	Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN, United States; Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY, United States; Berkeley Geochronology Center, Berkeley, CA, United States; Lawrence Livermore National Laboratory, Livermore, CA, United States; Department of Earth Sciences, University of Cambridge, Cambridge, United Kingdom
推荐引用方式 GB/T 7714	de Wet C.B.,Erhardt A.M.,Sharp W.D.,et al. Semiquantitative Estimates of Rainfall Variability During the 8.2 kyr Event in California Using Speleothem Calcium Isotope Ratios[J],2021,48(3).
APA	de Wet C.B..,Erhardt A.M..,Sharp W.D..,Marks N.E..,Bradbury H.J..,...&Oster J.L..(2021).Semiquantitative Estimates of Rainfall Variability During the 8.2 kyr Event in California Using Speleothem Calcium Isotope Ratios.Geophysical Research Letters,48(3).
MLA	de Wet C.B.,et al."Semiquantitative Estimates of Rainfall Variability During the 8.2 kyr Event in California Using Speleothem Calcium Isotope Ratios".Geophysical Research Letters 48.3(2021).