DOI: 10.1016/j.quascirev.2015.05.016
Scopus记录号: 2-s2.0-84945473850
论文题名: Sulphate concentration in cave dripwater and speleothems: Long-term trends and overview of its significance as proxy for environmental processes and climate changes
作者: Borsato A. ; Frisia S. ; Wynn P.M. ; Fairchild I.J. ; Miorandi R.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 127 起始页码: 48
结束页码: 60
语种: 英语
英文关键词: Anthropogenic sulphur peak
; Karst water
; Speleothems
; Sulphur
; Volcanic eruptions
Scopus关键词: Aquifers
; Biogeochemistry
; Caves
; Digital storage
; Sulfur
; Sulfur compounds
; Time delay
; Volcanoes
; Anthropogenic sulphur peak
; Biogeochemical cycling
; Environmental process
; Karst water
; Speleothems
; Sulphate concentrations
; Variable time delay
; Volcanic eruptions
; Climate change
; aquifer
; biogeochemical cycle
; climate variation
; concentration (composition)
; efficiency measurement
; environmental assessment
; karst hydrology
; long-term change
; proxy climate record
; spatiotemporal analysis
; speleothem
; sulfate
; sulfur emission
; volcanic eruption
; Ernesto Cave
; Italy
; Trentino-Alto Adige
; Trento
英文摘要: Sulphate concentrations in speleothems identify major volcanic eruptions, provide useful information on soil and aquifer dynamics and, in similar fashion to the 14C bomb peak, its Anthropocene peak can be used to date recent cave formations. However, the transmission of S from the atmosphere to cave dripwater and its incorporation in speleothems is subjected to biogeochemical cycling and accurate studies of each cave site are needed in order to assess how the S atmospheric signal is modified and eventually encoded in speleothems. This study investigates the role of biogeochemical cycling and aquifer hydrology by utilising published and new dripwater and speleothem data from Grotta di Ernesto (ER) in northern Italy. Here we provide the first long-term record of sulphate concentration in cave dripwater based on over 20 years of measurements. Fast drip site st-ER1 is characterised by a continuous decrease in SO4 concentration from a high of 7.5 ± 0.8 mg/l in 1993-1994 to a low of 2.2 ± 0.2 mg/l in 2013-2014, and replicates with a delay of ~15 years the decline in the atmospheric SO2 emissions. The S-series of slow flow ER78 site is further delayed by ~4.5 years in relation to the S retention in the aquifer matrix. The dripwater data are used to extend the previously published S record (1810-1998 AD) of stalagmite ER78 and reconstruct the anthropogenic S-peak: this displays a delay of ~20 years with respect to the atmospheric S emission peak due to biogeochemical cycling and aquifer storage. However, sulphur recycling above the cave did not operate with the same degree of efficiency through time, which resulted in a variable time delay between S deposition and incorporation into the stalagmite. In the pre-Anthropocene era, and in particular during the cold Little Ice Age, biogeochemical cycling was far less efficient than today, and the fast transmission of the atmospheric signal allowed capture of S released during major volcanic eruptions by stalagmites. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59809
Appears in Collections: 过去全球变化的重建
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作者单位: School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW, Australia; Lancaster Environment Centre, University of Lancaster, Lancaster, United Kingdom; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, Edgbaston, United Kingdom; Gruppo Grotte S.A.T. Emilio Roner, Rovereto, TN, Italy
Recommended Citation:
Borsato A.,Frisia S.,Wynn P.M.,et al. Sulphate concentration in cave dripwater and speleothems: Long-term trends and overview of its significance as proxy for environmental processes and climate changes[J]. Quaternary Science Reviews,2015-01-01,127