DOI: 10.1016/j.quascirev.2015.11.015
Scopus记录号: 2-s2.0-84949238927
论文题名: A multi-proxy record of MIS 11-12 deglaciation and glacial MIS 12 instability from the Sulmona basin (central Italy)
作者: Regattieri E. ; Giaccio B. ; Galli P. ; Nomade S. ; Peronace E. ; Messina P. ; Sposato A. ; Boschi C. ; Gemelli M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 132 起始页码: 129
结束页码: 145
语种: 英语
英文关键词: Central Italy
; Lacustrine succession
; MIS 12-11
; Stable isotope
; Tephrostratigraphy
Scopus关键词: Atmospheric temperature
; Calcium carbonate
; Catchments
; Glacial geology
; Incident solar radiation
; Isotopes
; Lakes
; Lithology
; Oceanography
; Runoff
; Solar radiation
; Surface waters
; Volcanoes
; Central Italy
; Continental hydrologies
; Hydrological variability
; Lacustrine succession
; Major and minor elements
; Oxygen isotopic composition
; Stable isotopes
; Tephrostratigraphy
; Deposition
英文摘要: A multi-proxy record (lithology, XRF, CaCO3 content, carbonate δ18O and δ13C) was acquired from a sediment core drilled in the intermountain Sulmona basin (central Italy). Tephrostratigraphic analyses of three volcanic ash layers ascribe the investigated succession to the MIS 12-MIS 11 period, spanning the interval ca. 500-410 ka. Litho-pedo facies assemblage indicates predominant lacustrine deposition, interrupted by a minor sub-aerial and lake low stand episode. Variations in major and minor elements concentrations are related to changes in the clastic input to the lake. The oxygen isotopic composition of carbonate (δ18Oc) intervals is interpreted mainly as a proxy for the amount of precipitation in the high-altitude catchment of the karst recharge system. The record shows pronounced hydrological variability at orbital and millennial time-scales, which appears closely related to the Northern Hemisphere summer insolation pattern and replicates North Atlantic and west Mediterranean Sea Surface Temperature (SST) fluctuations. The MIS 12 glacial inception is marked by an abrupt reduction of precipitation, lowering of the lake level and enhanced catchment erosion. A well-defined and isotopically prominent interstadial with increased precipitation maybe related to insolation maxima-precession minima at ca. 465 ka. This interstadial ends abruptly at ca. 457 ka and it is followed by a phase of strong short-term instability. Drastic lake-level lowering and enhanced clastic flux characterized the MIS 12 glacial maximum. Lacustrine deposition restarted about 440 ka ago. The MIS 12-MIS 11 transition is characterized by a rapid increase in the precipitation, lake-level rise and reduction in the clastic input, interrupted by a short and abrupt return to drier conditions. Comparison with marine records from the Iberian margin and western Mediterranean suggests that major events of ice rafted debris deposition, related to southward migrations of the polar front, match the harshest periods in central Italy. This indicates strong teleconnections between Northern hemisphere ice sheet dynamics, North Atlantic oceanic conditions and Mediterranean continental hydrology. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59709
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, CNR, Via Salaria km 29.4, Monterotondo, Rome, Italy; Dipartimento della Protezione Civile, Via Vitorchiano 4, Rome, Italy; Laboratoire des Sciences du Climat et de l'Environnement, IPSL, Laboratoire CEA/CNRS/UVSQ, Gif-Sur-Yvette, France; Istituto di Geoscienze e Georisorse IGG-CNR, Via Moruzzi 1 Pisa, Italy; Dipartimento di Scienze della Terra, University of Pisa, Via S. Maria 53, Pisa, Italy
Recommended Citation:
Regattieri E.,Giaccio B.,Galli P.,et al. A multi-proxy record of MIS 11-12 deglaciation and glacial MIS 12 instability from the Sulmona basin (central Italy)[J]. Quaternary Science Reviews,2016-01-01,132