globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-10-2779-2016
Scopus记录号: 2-s2.0-84996922060
论文题名:
Age of the Mt. Ortles ice cores, the Tyrolean Iceman and glaciation of the highest summit of South Tyrol since the Northern Hemisphere Climatic Optimum
作者: Gabrielli P; , Barbante C; , Bertagna G; , Bertó M; , Binder D; , Carton A; , Carturan L; , Cazorzi F; , Cozzi G; , Dalla Fontana G; , Davis M; , De Blasi F; , Dinale R; , Dragà G; , Dreossi G; , Festi D; , Frezzotti M; , Gabrieli J; , Galos S; , Ginot P; , Heidenwolf P; , Jenk T; M; , Kehrwald N; , Kenny D; , Magand O; , Mair V; , Mikhalenko V; , Lin P; N; , Oeggl K; , Piffer G; , Rinaldi M; , Schotterer U; , Schwikowski M; , Seppi R; , Spolaor A; , Stenni B; , Tonidandel D; , Uglietti C; , Zagorodnov V; , Zanoner T; , Zennaro P
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期:6
起始页码: 2779
结束页码: 2797
语种: 英语
英文摘要: In 2011 four ice cores were extracted from the summit of Alto dell'Ortles (3859-m), the highest glacier of South Tyrol in the Italian Alps. This drilling site is located only 37 km southwest from where the Tyrolean Iceman, ∼ 5.3 kyrs old, was discovered emerging from the ablating ice field of Tisenjoch (3210 m, near the Italian-Austrian border) in 1991. The excellent preservation of this mummy suggested that the Tyrolean Iceman was continuously embedded in prehistoric ice and that additional ancient ice was likely preserved elsewhere in South Tyrol. Dating of the ice cores from Alto dell'Ortles based on 210Pb, tritium, beta activity and 14C determinations, combined with an empirical model (COPRA), provides evidence for a chronologically ordered ice stratigraphy from the modern glacier surface down to the bottom ice layers with an age of ∼ 7 kyrs, which confirms the hypothesis. Our results indicate that the drilling site has continuously been glaciated on frozen bedrock since ∼ 7 kyrs BP. Absence of older ice on the highest glacier of South Tyrol is consistent with the removal of basal ice from bedrock during the Northern Hemisphere Climatic Optimum (6-9 kyrs BP), the warmest interval in the European Alps during the Holocene. Borehole inclinometric measurements of the current glacier flow combined with surface ground penetration radar (GPR) measurements indicate that, due to the sustained atmospheric warming since the 1980s, an acceleration of the glacier Alto dell'Ortles flow has just recently begun. Given the stratigraphic-chronological continuity of the Mt. Ortles cores over millennia, it can be argued that this behaviour has been unprecedented at this location since the Northern Hemisphere Climatic Optimum. © 2016 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75039
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Byrd Polar and Climate Research Center, Ohio State University, Columbus, United States; School of Earth Sciences, Ohio State University, 275 Mendenhall Laboratory, Columbus, United States; Department of Environmental Sciences Informatics and Statistics, Ca' Foscari University of Venice, Venice-Mestre, Italy; Istituto per la Dinamica Dei Processi Ambientali-CNR, Venice-Mestre, Italy; Accademia Nazionale Dei Lincei, Rome, Italy; Climate Research Section, Central Institute for Meteorology and Geodynamics ZAMG, Vienna, Austria; Department of Geosciences, University of Padova, Padova, Italy; Department of Land Environment, Agriculture and Forestry, University of Padova, Agripolis Legnaro, Italy; Dipartimento di Scienze Agro-Alimentari Ambientali e Animali, Università di Udine, Udine, Italy; Ufficio Idrografico Provincia Autonoma di Bolzano, Bolzano, Italy; Geologin, Varna, Italy; Institute for Botany, University of Innsbruck, Innsbruck, Austria; ENEA, Rome, Italy; Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria; Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), CNRS, Grenoble, France; University Grenoble Alpes, Grenoble, France; Laboratory of Environmental Chemistry, Paul Scherrer Institut, Villigen, Switzerland; Geosciences and Environmental Change Science Center, U.S. Geological Survey, Denver, United States; Ufficio Geologia e Prove Materiali, Provincia Autonoma di Bolzano, Kardano, Italy; Institute of Geography, Russian Academy of Sciences, Moscow, Russian Federation; Waterstones Geomonitoring, Egna, Italy; University of Bern, Bern, Switzerland; Department of Earth and Environmental Sciences, University of Pavia, Pavia, Italy

Recommended Citation:
Gabrielli P,, Barbante C,, Bertagna G,et al. Age of the Mt. Ortles ice cores, the Tyrolean Iceman and glaciation of the highest summit of South Tyrol since the Northern Hemisphere Climatic Optimum[J]. Cryosphere,2016-01-01,10(6)
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