Constraining the onset of the Holocene "Neoglacial" over the central Italy using tephra layers

被引：52

作者：

Zanchetta, Giovanni ^{[1
,2
,3
]}

Giraudi, Carlo ^{[4
]}

Sulpizio, Roberto ^{[5
]}

Magny, Michel ^{[6
]}

Drysdale, Russell N. ^{[7
]}

Sadori, Laura ^{[8
]}

机构：

[1] Univ Pisa, Dipartimento Sci Terra, I-56126 Pisa, Italy

[2] INGV Sez Pisa, I-56100 Pisa, Italy

[3] IGG CNR, I-56100 Pisa, Italy

[4] ENEA, CR Saluggia, I-13040 Vercelli, Italy

[5] Univ Bari, CIRISIVU, Dipartimento Geomineral, I-70125 Bari, Italy

[6] CNRS, Lab Chronoenvironm, UFR Sci & Tech, UMR 6249, F-25030 Besancon, France

[7] Univ Melbourne, Dept Resource Management & Geog, Melbourne, Vic 3010, Australia

[8] Univ Roma La Sapienza, Dipartimento Biol Vegetate, I-00185 Rome, Italy

来源：

QUATERNARY RESEARCH | 2012年 / 78卷 / 02期

关键词：

Tephrostratigraphy; Holocene; Central Italy; Paleoclimate; LAGO DI MEZZANO; TEPHROSTRATIGRAPHIC RECORD; SOMMA-VESUVIUS; CLIMATIC VARIATIONS; QUATERNARY TEPHRAS; GLASS COMPOSITIONS; MARINE SEQUENCES; BRONZE-AGE; 100; KA; BP;

D O I：

10.1016/j.yqres.2012.05.010

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

A study of six tephra layers discovered in different deposits between 1600 and 2700 m a.s.l. in the Apennine chain in central Italy allowed precise stratigraphic constraints on environmental and climatic changes between ca. 4.5 and 3.8 cal ka BP. Chemical analyses allowed the correlation of these tephra layers with the eruptions of Agnano Mt Spina (AMST) from Phlegrean Field and Avellino (AVT) from Somma-Vesuvius. Major environmental changes in the high mountains of the Central Apennines occurred just after the deposition of the AMST and predate the deposition of the AVT. At this time, renewed growth of the Calderone Glacier occurred, marking the onset of the Apennine "Neoglacial". The presence of the AMST and AVT enabled us to make a precise, physical correlation with other archives in central Italy. Synchronization of records between sites showed that the period intervening the deposition of the AMST and AVT layers coincided with environmental changes that were not always exactly in phase. This highlights the fact that stratigraphic correlations using only radiocarbon chronologies (the most common method used for dating archives during the Holocene) could produce erroneous correlation of events, giving rise to oversimplified paleoclimatic reconstructions. (c) 2012 University of Washington. Published by Elsevier Inc. All rights reserved.

引用

页码：236 / 247

页数：12

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