Page 15 - 15 New data on the Holocenic sea-level

F. Antonioli et al. / Global and Planetary Change 34 (2002) 121–140 137

Fig. 12. Sea-level positions reconstructed by Alessio et al. (1998) for the central Tyrrhenian Sea, and by Bard et al. (1996) for the Pacific Ocean.

Data obtained from Vermetid reefs and Lithophaga from Marettimo have been also reported for comparison. Vertical error for sea level data is
assumed F 50 cm for Argentarola, Palinuro and Marettimo; F 8 cm for San Vito Vermetids. Maximum analytical error for 14C analysis show a

range comprised between F 21 and F 285 years cal BP.

1996) have contributed to the many uncertainties quite limited, while for the 6000-year BP time inter-
affecting the recostruction of Holocene relative sea- val, the glacio- and hydroisostatic components show
level. Lambeck and Johnston (1995) calculated the horizontal gradients in the relative sea-level fluctua-
hydro- and glacio-isostatic-related uplift (or depres- tions along the Italian coasts up to some meters. Up to
sion) for the Earth crust which is due, respectively, to now, these curves have been modeled by the Authors
the differences in sea-water load on continental plat- introducing structural data from the Eastern Mediter-
forms, and to the melting (during interglacial periods) ranean Sea only and, for this reason, they need to be
of glaciers and ice caps that weighted heavily on the implemented with the introduction of local data from
crust. Pirazzoli et al. (1997) reported a first indicative the Central Mediterranean Sea (including Sicily) to
isostatic model calculated for the Italian region by model with further detail the glacio- and hydro-iso-
Lambeck and Johnston. These curves show the values static behaviour of this area.
of the glacio and hydroisostatic component to relative
sea level for the last 2000 and 6000 years BP. For the The preliminary results on predicted (based on the
2000-year BP time-slice, the differential contribution ice model prediction 1151, earth model maA4, K.
for hydroisostatic effects along the Tyrrhenian coast is Lambeck, personal communication) and observed sea
level positions in the last thousand years for the Capo