globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.09.027
Scopus记录号: 2-s2.0-84989910202
论文题名:
Environmental variability between the penultimate deglaciation and the mid Eemian: Insights from Tana che Urla (central Italy) speleothem trace element record
作者: Regattieri E.; Zanchetta G.; Drysdale R.N.; Isola I.; Woodhead J.D.; Hellstrom J.C.; Giaccio B.; Greig A.; Baneschi I.; Dotsika E.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 152
起始页码: 80
结束页码: 92
语种: 英语
英文关键词: Central Italy ; Last Interglacial ; Penultimate deglaciation ; Speleothem ; Trace elements
Scopus关键词: Barium ; Catchments ; Caves ; Climate change ; Geochronology ; Isotopes ; Magnesium ; Rain ; Soils ; Strontium ; Vegetation ; Central Italy ; Deglaciations ; Environmental evolution ; Environmental variability ; Last interglacial ; Regional climate changes ; Speleothem ; Trace element composition ; Trace elements
英文摘要: A trace element record (Mg, Sr, Ba, Al, Si, P, Y, Zn) covering the ca. 133 ka to ca. 124 ka time interval was acquired from a flowstone core from Tana che Urla Cave (central Italy). It was compared with stable isotope data to investigate the environmental evolution in response to regional and extra-regional climate changes in the period corresponding to the latter part of the Penultimate Deglaciation and the first part of the Last Interglacial (Eemian). Trace element geochemical changes on centennial and millennial time scales responded to changes in hydrological input, variations in the supply and transport of catchment erosion products to the cave, including those linked to intense rainfall events, and to the state of the overlying soil and vegetation. Abrupt increases in precipitation and the progressive development of soil and vegetation occurred at ca. 132 ka, in response to the development of the global deglacial phase. The major changes in trace element composition are coherent with the previous hydrological interpretation of speleothem oxygen stable isotope composition (δ18O) as predominantly a rainfall-amount proxy. However, reduced growth rate persisted until ca. 130 ka, suggesting still depressed temperatures. An abrupt event of climatic deterioration, with marked decrease in precipitation and soil degradation, is apparent between ca. 131 and 130 ka. Cool-wet conditions between ca. 132 and 131 ka and the subsequent dry period may represent the local hydrological response to an interval of North Atlantic cooling and ice-rafted-debris (IRD) deposition known as Heinrich event 11 (H11). After 129.6 ka there was a rapid recovery according to all of the studied speleothem properties, indicating the onset of full interglacial conditions. A minor amplitude event of reduced precipitation is recorded within the LIG at ca. 127 ka. The record highlights the growing regional evidence for a complex penultimate deglacial climate involving major reorganization of oceanic and atmospheric patterns. © 2016 Elsevier Ltd
资助项目: Funded by the Australian Research Council, Discovery Projects DP110102185. During analytical work, ER was supported by a Ph.D grant of the School of Graduate Studies Galileo Galilei (University of Pisa). We thank the Federazione Speleologica Toscana and Parco delle Alpi Apuane for supporting our work on Apuan Alps speleothems. We also thank C. Boschi and M. Guidi for use of facilities at the IGG-CNR, Pisa.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59402
Appears in Collections:过去全球变化的重建

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作者单位: Istituto di Geologia Ambientale e Geoingegneria, IGAG-CNR, Via Salaria Km. 29.300 Monterotondo, Rome, Italy; Dipartimento di Scienze della Terra, Via S. Maria 53, Pisa, Italy; Istituto di Geoscienze e Georisorse IGG-CNR, Via Moruzzi 1, Pisa, Italy; Istituto Nazionale di Geofisica e Vulcanologia INGV, Via della Faggiola 32, Pisa, Italy; School of Geography, University of Melbourne, Victoria, Australia; EDYTEM, UMR CNRS 5204, Université de Savoie-Mont Blanc, Le Bourget du Lac Cedex, France; School of Earth Sciences, University of Melbourne, Victoria, Australia; National Center for Scientific Research Demokritos, Athens, Greece

Recommended Citation:
Regattieri E.,Zanchetta G.,Drysdale R.N.,et al. Environmental variability between the penultimate deglaciation and the mid Eemian: Insights from Tana che Urla (central Italy) speleothem trace element record[J]. Quaternary Science Reviews,2016-01-01,152
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