气候变化领域集成服务门户(CCPortal): The SP19 chronology for the South Pole Ice Core - Part 1: Volcanic matching and annual layer counting

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DOI	10.5194/cp-15-1793-2019
	The SP19 chronology for the South Pole Ice Core - Part 1: Volcanic matching and annual layer counting
	Winski D.A.; Fudge T.J.; Ferris D.G.; Osterberg E.C.; Fegyveresi J.M.; Cole-Dai J.; Thundercloud Z.; Cox T.S.; Kreutz K.J.; Ortman N.; Buizert C.; Epifanio J.; Brook E.J.; Beaudette R.; Severinghaus J.; Sowers T.; Steig E.J.; Kahle E.C.; Jones T.R.; Morris V.; Aydin M.; Nicewonger M.R.; Casey K.A.; Alley R.B.; Waddington E.D.; Iverson N.A.; Dunbar N.W.; Bay R.C.; Souney J.M.; Sigl M.; McConnell J.R.
发表日期	2019
ISSN	18149324
起始页码	1793
结束页码	1808
卷号	15 期号:5
英文摘要	The South Pole Ice Core (SPICEcore) was drilled in 2014-2016 to provide a detailed multi-proxy archive of paleoclimate conditions in East Antarctica during the Holocene and late Pleistocene. Interpretation of these records requires an accurate depth-age relationship. Here, we present the SPICEcore (SP19) timescale for the age of the ice of SPICEcore. SP19 is synchronized to the WD2014 chronology from the West Antarctic Ice Sheet Divide (WAIS Divide) ice core using stratigraphic matching of 251 volcanic events. These events indicate an age of 54 302±519 BP (years before 1950) at the bottom of SPICEcore. Annual layers identified in sodium and magnesium ions to 11 341 BP were used to interpolate between stratigraphic volcanic tie points, yielding an annually resolved chronology through the Holocene. Estimated timescale uncertainty during the Holocene is less than 18 years relative to WD2014, with the exception of the interval between 1800 to 3100 BP when uncertainty estimates reach ±25 years due to widely spaced volcanic tie points. Prior to the Holocene, uncertainties remain within 124 years relative to WD2014. Results show an average Holocene accumulation rate of 7.4 cm yr-1 (water equivalent). The time variability of accumulation rate is consistent with expectations for steady-state ice flow through the modern spatial pattern of accumulation rate. Time variations in nitrate concentration, nitrate seasonal amplitude and δ15N of N2 in turn are as expected for the accumulation rate variations. The highly variable yet well-constrained Holocene accumulation history at the site can help improve scientific understanding of deposition-sensitive climate proxies such as δ15N of N2 and photolyzed chemical compounds. © Author(s) 2019.
语种	英语
scopus关键词	chronology; Holocene; ice core; ice flow; paleoclimate; proxy climate record; snow accumulation; steady-state equilibrium; timescale; volcanic island; Antarctic Ice Sheet; Antarctica; East Antarctica; South Pole; West Antarctic Ice Sheet; West Antarctica
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146774
作者单位	School of Earth and Climate Sciences, University of Maine, Orono, ME, United States; Climate Change Institute, University of Maine, Orono, ME, United States; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States; Department of Earth Sciences, Dartmouth College, Hanover, NH, United States; School of Earth and Sustainability, Northern Arizona University, Flagstaff, AZ, United States; Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD, United States; Physical Science Department, Butte College, Oroville, CA, United States; College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Scripps Institution of Oceanography, UC San Diego, San Diego, CA, United States; Department of Geosciences and Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA, United States; Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO, United States; D...
推荐引用方式 GB/T 7714	Winski D.A.,Fudge T.J.,Ferris D.G.,et al. The SP19 chronology for the South Pole Ice Core - Part 1: Volcanic matching and annual layer counting[J],2019,15(5).
APA	Winski D.A..,Fudge T.J..,Ferris D.G..,Osterberg E.C..,Fegyveresi J.M..,...&McConnell J.R..(2019).The SP19 chronology for the South Pole Ice Core - Part 1: Volcanic matching and annual layer counting.Climate of the Past,15(5).
MLA	Winski D.A.,et al."The SP19 chronology for the South Pole Ice Core - Part 1: Volcanic matching and annual layer counting".Climate of the Past 15.5(2019).