A MIS 9/MIS 8 speleothem record of hydrological variability from Macedonia (F.Y.R.O.M.)

Autor: Regattieri E.[1, 2, Zanchetta G.[1, Isola I.[4], Bajo P.[5], Perchiazzi N.[1], Drysdale R.N.[5, Boschi C.[3], Hellstrom J.C.[7], Francke A.[2, Wagner B. [2]
Přispěvatelé: Referent HAL Edytem, Christine Maury, Dipartimiento di Scinze della Terra, University of Pisa - Università di Pisa, Dipartimiento di Scienze della Terra, Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Department of Resource Management and Geography, University of Melbourne, Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), School of Earth Sciences [Melbourne], Faculty of Science [Melbourne], University of Melbourne-University of Melbourne, Institute for Geology & Mineralogy Cologne, Université de Cologne
Jazyk: angličtina
Rok vydání: 2018
Předmět:
010504 meteorology & atmospheric sciences
δ18O
[SDE.MCG]Environmental Sciences/Global Changes
[SHS.GEO] Humanities and Social Sciences/Geography
Speleothem
010502 geochemistry & geophysics
Oceanography
01 natural sciences
Stable isotope geochemistry
Glacial period
Precipitation
MIS9
Speleothem
Southern Balkans
MIS9
Stable isotope geochemistry
Holocene
0105 earth and related environmental sciences
Global and Planetary Change
geography
geography.geographical_feature_category
[SDE.IE]Environmental Sciences/Environmental Engineering
Southern Balkans
[SHS.GEO]Humanities and Social Sciences/Geography
15. Life on land
[SDE.ES]Environmental Sciences/Environmental and Society
[SDE.BE] Environmental Sciences/Biodiversity and Ecology
[SDE.MCG] Environmental Sciences/Global Changes
13. Climate action
Isotope geochemistry
Interglacial
Period (geology)
Physical geography
[SDE.IE] Environmental Sciences/Environmental Engineering
[SDE.ES] Environmental Sciences/Environmental and Society
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Zdroj: Global and planetary change
162 (2018): 39–52. doi:10.1016/j.gloplacha.2018.01.003
info:cnr-pdr/source/autori:Regattieri E.[1,2,3], Zanchetta G.[1,4], Isola I.[4], Bajo P.[5], Perchiazzi N.[1], Drysdale R.N.[5,6], Boschi C.[3], Hellstrom J.C.[7], Francke A.[2,7], Wagner B. [2]/titolo:A MIS 9%2FMIS 8 speleothem record of hydrological variability from Macedonia (F.Y.R.O.M.)/doi:10.1016%2Fj.gloplacha.2018.01.003/rivista:Global and planetary change (Print)/anno:2018/pagina_da:39/pagina_a:52/intervallo_pagine:39–52/volume:162
Global and Planetary Change
Global and Planetary Change, Elsevier, 2018, 162, pp. 39-52
ISSN: 0921-8181
DOI: 10.1016/j.gloplacha.2018.01.003
Popis: International audience; The period corresponding to Marine Isotope Stages 9 (MIS 9) offers the opportunity to study orbital and suborbital scale climate variability under boundary conditions different from those of better studied intervals such as the Holocene and the Last Interglacial. Yet, it is poorly represented in independently-dated continental archives around the Mediterranean Region. Here, we present a speleothem stable isotope record (delta O-18 and C-813) from the Former Yugoslavian Republic of Macedonia (F.Y.R.O.M., southern Balkans), which consists of two periods of growth broadly covering the ca. 332 to 292 ka and the ca. 264 to 248 ka intervals (MIS 9e-b and late MIS 8). We interpret the speleothem delta O-18 as mostly related to regional hydrology, with variations that can be interpreted as due to changes in rainfall amount, with higher/lower values associated to drier/wetter condition. This interpretation is corroborated by a change in mineralogical composition between aragonite and calcite at ca. 328 ka, which marks increasing precipitation at the onset of MIS 9 and occurs within a trend of decreasing delta O-18 values. Also the comparison with the multiproxy climate record available from the nearby Lake Ohrid seems to support the proposed interpretation. The MIS 9e interglacial appears to be characterized by wettest conditions between ca. 326 and 321 ka, i.e. lasting ca. 5 kyr. Decreasing precipitation and enhanced millennial scale variability matches the glacial inception (MIS9 d to b), with drier events at ca. 319 ka (ca. 2 kyr long) and 310 ka (ca. 1 kyr long), and a major rainfall reduction between 306 and 298 ka. The latter is followed by a prominent wetter period between 298 and 295 ka, for which carbon data values suggest high infiltration rate. Rainfall decreases again after 295 ka, and remain low until the growth interruption at ca. 292 ka. Resumption of the growth and progressive soil development, expressed by the carbon isotope record, occurred during the late part of MIS 8. Despite the rather high temporal uncertainty (average 6 ka), the speleothem hydrological record complements the environmental information provided by the Lake Ohrid record and also fits well to the framework of regional and extra-regional variability, showing similarities with pollen records from southern and western Europe, both at orbital and at sub-orbital time scale.
Databáze: OpenAIRE
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