The 4.2 ka event in the central Mediterranean: new data from a Corchia speleothem (Apuan Alps, central Italy)
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Published:2019-01-22
Issue:1
Volume:15
Page:135-151
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ISSN:1814-9332
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Container-title:Climate of the Past
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language:en
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Short-container-title:Clim. Past
Author:
Isola IlariaORCID, Zanchetta GiovanniORCID, Drysdale Russell N., Regattieri Eleonora, Bini MonicaORCID, Bajo Petra, Hellstrom John C.ORCID, Baneschi IlariaORCID, Lionello PieroORCID, Woodhead Jon, Greig Alan
Abstract
Abstract. We present new data on the 4.2 ka event in the central Mediterranean from
Corchia Cave (Tuscany, central Italy) stalagmite CC27. The stalagmite was
analyzed for stable isotopes (δ13C and δ18O)
and trace elements (Mg, U, P, Y), with all proxies showing a coherent phase
of reduced cave recharge between ca. 4.5 and 4.1 ka BP. Based on the
current climatological data on cyclogenesis, the reduction in cave recharge
is considered to be associated with the weakening of the cyclone center
located in the Gulf of Genoa in response to reduced advection of air masses
from the Atlantic during winter. These conditions, which closely resemble a
positive North Atlantic Oscillation (NAO) type of configuration, are
associated with cooler and wetter summers with reduced sea warming, which
reduced the western Mediterranean evaporation during autumn–early winter,
further reducing precipitation.
Funder
Università di Pisa
Publisher
Copernicus GmbH
Subject
Paleontology,Stratigraphy,Global and Planetary Change
Reference104 articles.
1. Alpert, P., Baldi, M., Ilani, R., Krichak, S., Price, C., Rodo, X., Saaroni,
H., Ziv, B., Kishcha, P., Barkan, J., Mariotti, A., and Xoplaki, E.:
Relations between climate variability in the Mediterranean region and the
tropics: ENSO, South Asian and African monsoons, hurricanes and Saharan dust,
in: Developments in Earth and Environmental Sciences, 4, 149–177, Elsevier, Amsterdam,
2006. a 2. Baldini, L. M., McDermott, F., Foley, A. M., and Baldini, J. U.: Spatial
variability in the European winter precipitation δ18O-NAO
relationship: Implications for reconstructing NAO-mode climate variability in
the Holocene, Geophys. Res. Lett., 35, 4, https://doi.org/10.1029/2007GL032027, 2008. a, b, c 3. Baneschi, I., Piccini, L., Regattieri, E., Isola, I., Guidi, M., Lotti, L.,
Mantelli, F., Menichetti, M., Drysdale, R. N., and Zanchetta, G.: Hypogean
microclimatology and hydrogology of the 800–900 m asl level in the Monte
Corchia cave (Tuscany, Italy): preliminary considerations and implications
for paleoclimatological studies, Acta Carsologica, 40, 175–187, 2011. a, b, c, d 4. Bajo, P., Hellstrom, J., Frisia, S., Drysdale, R., Black, J., Woodhead, J.,
Borsato, A., Wallace, M. W., Regattieri, E., and Haese, R.: “Cryptic”
diagenesis and its implications for speleothem geochronologies, Quaternary
Sci. Rev., 148, 17–28, 2016. a, b, c 5. Bajo, P., Borsato, A., Drysdale, R. N., Hua, Q., Frisia, S., Zanchetta, G.,
Hellstrom, J. C., Woodhead, J., and Hendy, C.: Stalagmite carbon isotopes and
dead carbon proportion (DCP) in a near-closed-system situation: An interplay
between sulphuric and carbonic acid dissolution, Geochim. Cosmochim. Ac.,
210, 208–227, 2017. a
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