DOI: 10.1016/j.epsl.2019.115946
论文题名: Magnetic detection of paleoflood layers in stalagmites and implications for historical land use changes
作者: Feinberg J.M. ; Lascu I. ; Lima E.A. ; Weiss B.P. ; Dorale J.A. ; Alexander E.C. ; Jr. ; Edwards R.L.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 530 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164958
Appears in Collections: 气候变化与战略
There are no files associated with this item.
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
Recommended Citation:
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]. Earth and Planetary Science Letters,2020-01-01,530