气候变化领域集成服务门户(CCPortal): Magnetic detection of paleoflood layers in stalagmites and implications for historical land use changes

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DOI	10.1016/j.epsl.2019.115946
	Magnetic detection of paleoflood layers in stalagmites and implications for historical land use changes
	Feinberg J.M.; Lascu I.; Lima E.A.; Weiss B.P.; Dorale J.A.; Alexander E.C.; Jr.; Edwards R.L.
发表日期	2020
ISSN	0012821X
卷号	530
英文摘要	Flooding events are major natural hazards that present significant risk to communities worldwide. Calculations of flood recurrence rate through time are important tools for regulating land use, determining insurance rates, and for the design and construction of levees and dams. Typically, flood recurrence rates are based on limited historical data or on evidence preserved in the geologic record as overbank deposits, tree ring scars, or high water scour marks. However, these approaches are either limited in their ability to produce continuous time series of flooding events or do not consider the effects of regional land use change. Here we use scanning superconducting quantum interference device (SQUID) microscopy to rapidly image the magnetization associated with flood layers in a polished surface of an annually laminated stalagmite from Spring Valley Caverns (SVC) in southeastern Minnesota. A time series of magnetization peaks, each of which corresponds to a flooding event, yields an average flood recurrence rate of ≤5 events per century for the last 500 years. This rate increases to ∼7 events per century since 1900, coincident with historical timber and agricultural land-use changes in Minnesota. This approach produces a continuous record of well-dated, extreme-precipitation events that can be examined within the context of land use change. © 2019 Elsevier B.V.
关键词	flood recurrence mineral magnetism scanning SQUID microscopy speleothem
英文关键词	Continuous time systems; Floods; Forestry; Magnetization; Molluscs; Precipitation (meteorology); Quantum interference devices; Scour; Shellfish; SQUIDs; Time series; Trees (mathematics); Agricultural land use; Design and construction; Extreme precipitation events; Magnetic detection; Magnetization peak; Polished surfaces; Scanning SQUID microscopy; speleothem; Land use; cavern; detection method; flood frequency; karst; land use change; magnetic mineral; magnetic survey; magnetization; mineral property; paleoflood; speleothem; stalagmite; Minnesota; United States
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202580
作者单位	Institute for Rock Magnetism, Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN 55455, United States; Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Department of Earth and Environmental Sciences, University of Iowa, Iowa City, IA 52242, United States
推荐引用方式 GB/T 7714	Feinberg J.M.,Lascu I.,Lima E.A.,et al. Magnetic detection of paleoflood layers in stalagmites and implications for historical land use changes[J],2020,530.
APA	Feinberg J.M..,Lascu I..,Lima E.A..,Weiss B.P..,Dorale J.A..,...&Edwards R.L..(2020).Magnetic detection of paleoflood layers in stalagmites and implications for historical land use changes.Earth and Planetary Science Letters,530.
MLA	Feinberg J.M.,et al."Magnetic detection of paleoflood layers in stalagmites and implications for historical land use changes".Earth and Planetary Science Letters 530(2020).