Expanding the western Mediterranean Holocene relative sea-level records: new data from Balearic, Corsica and Sardinia Islands

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05-07-2018 Matteo Vacchi Lecturer at the College of Life and

1 Expanding the western Mediterranean Holocene relative sea-level records: new data from Balearic, Corsica and Sardinia Islands Roma, Matteo Vacchi Lecturer at the College of Life and Environmental Sciences University of Exeter, United Kindgom

2 Introduction Methodology Results Discussion Holocene sea-level evolution, A key paleo-climatological information to better assess future sea-level rise in a changing climate. Importance the Mediterranean basin Intermediate field to far field Mainly microtidal and deeply investigated in the past From Vacchi et al., 2016 Complex geodynamic setting West Med

3 Introduction Methodology Results Discussion Variability controlled by -tectonics, -compaction-related subsidence -glacio-hydro isostatic adjustment (GIA) Past database Vacchi et al., 2016 ESR

4 Introduction Methodology Results Discussion Can we improve and expand current Mediterranean dataset? From Peltier, 2004 From Lambeck and Purcell 2005 Lambeck et al., 2011 Definition of maximal rates GIA related subsidence Serpelloni et al., 2013 GIA signal Roy and Peltier, 2018

Introduction Methodology Results Discussion Production of RSL

Mangrove peats, Is there a quantitative relationship with the

robustly define an indicative meaning for the the different

5 Introduction Methodology Results Discussion Production of RSL index or limiting points according to the IGCP standard Mangrove peats, Is there a quantitative relationship with the msl? Index or limiting points (marine-terrestrial) Can we robustly define an indicative meaning for the the different types of RSL indicators? Coral reefs, Index and Limiting points Beachrocks

data Very common in the Med Low-energy coasts Full of

6 Introduction Methodology Results Discussion Coastal lagoons and salt-marshes An important source of sea-level data Very common in the Med Low-energy coasts Full of datable material In equilibrium with the sea-level New field campaigns

Introduction Methodology Results Discussion A sample found in lagoonal or salt-marsh facies MUST be corrected for the indicative meaning to produce a sea-level index point Vacchi et al.

7 Introduction Methodology Results Discussion A sample found in lagoonal or salt-marsh facies MUST be corrected for the indicative meaning to produce a sea-level index point Vacchi et al., 2016 Bio-stratigraphic analyses - Malacofauna - Foraminifera - Ostracods - Laser Grain size Correct radiocarbon dating -plant macrofossils -wood -organic sediments (infos on C 13 /C 14 % 0) -marine and lagoonal shell (Delta R value) Indicative meaning

8 Introduction Methodology Results Discussion Minimize the additional vertical errors -Kobra vibracore -dgps -Total station -Lidar with drones Coring activity

9 Introduction Methodology Results Discussion Alcudia, Mallorca Definition of the depositional facies Production of new RSL index and limiting points Biostratigraphy

10 Introduction Methodology Results Discussion Baleares 69 new RSL index points 43 new limiting points West Med Vacchi et al., under review on QSR

11 Introduction Methodology Results Discussion Corsica 25 Sea-level index point 16 limiting points Sardinia 17 Sea-level index point 20 limiting points Corsica and Sardinia

12 Introduction Methodology Results Discussion 27 Sea-level index point 7 limiting points Baleares

13 Introduction Methodology Results Discussions Data vs GIA models We significantly expanded the dataset This data are free to use and are inglobated in the Holsea (INQUA CMP 1601) global database A very interesting misfit in the Balearic region? Data vs Gia models

14 Introduction Methodology Results Discussions GIA signal the western Med, different magnitudes but similar pattern From Lambeck and Purcell, 2005 to Lambeck et al., 2011 Roy and Peltier, 2018 West Med

15 Introduction Methodology Results Discussions Vacchi et al., under rev on QSR GIA pattern

16 Introduction Methodology Results Discusions Rita Levi Montalcini fellowship ( 210k Euros, , University of Pisa) -Definition of SALT-MARSH a FORAMINIFERA Mediterranean AND SEA LEVEL sea-level 321 transfer function, high resolution RSL data Pilot studies in: -Southern France -Corsica -Sardinia Calibrated years BP Shaw et al., 2016 FIGURE 4. Modern distribution of the relative abundance (%) of dead foraminifera plotted by distance for transect B-B1 at Blace. Foraminiferal abundance (per 5 cm 3 ), elevation (m HVRS71) and salt-marsh zones are also shown. Transect location is shown in Fig. 1C. Test the response (or non response) of the Med sea-level to the late-holocene climatic anomalies European temperatures ( C) Cooler On-going On-going work Cooler Gulf of Lion SST ( C) NW European storm periods -18.4

Long-Term Patterns of Coastal Response to Changing Land Use and Climate: Examples from the Atlantic and Gulf Coastal Plains

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