Core name Depth (cm) Average depth (cm) Year AD %N %C 3B1 0-1 0.5 2013 2.88 21.45 3B1 1-2 1.5 2005 2.91 19.41 3B1 2-3 2.5 1996 2.47 17.30 3B1 3-4 3.5 1988 2.15 14.52 3B1 4-5 4.5 1980 1.43 7.85 3B1 5-6 5.5 1971 1.56 10.59 3B1 6-7 6.5 1963 1.89 12.54 3B1 7-8 7.5 1955 1.69 8.61 3B1 8-9 8.5 1947 1.77 12.15 3B1 9-10 9.5 1938 1.89 11.55 3B1 10-11 10.5 1930 1.81 11.16 3B1 11-12 11.5 1922 1.96 12.52 3B1 12-13 12.5 1913 1.62 10.84 3B1 13-14 13.5 1905 1.67 11.75 3B1 14-15 14.5 1897 1.89 12.65 3B1 15-17 16 1884 1.90 13.74 3B1 17-18 17.5 1872 1.57 11.45 3B1 18-19 18.5 1864 2.27 14.75 3B1 19-20 19.5 1855 1.93 13.35 3B1 20-21 20.5 1847 1.66 10.10 3B1 21-22 21.5 1839 1.72 9.25 3B1 22-23 22.5 1831 1.32 7.14 3B1 23-24 23.5 1822 1.56 8.87 3B1 24-25 24.5 1814 1.44 8.93 3B1 25-26 25.5 1806 1.35 9.17 3B1 26-27 26.5 1797 1.61 9.23 3B1 27-28 27.5 1789 1.43 7.27 3B1 28-29 28.5 1781 1.47 8.42 3B1 29-30 29.5 1773 1.06 5.41 3B1 30-31 30.5 1764 1.33 7.18 3B2 0-1 0.5 2013 2.29 16.61 3B2 1-2 1.5 2004 2.82 18.92 3B2 2-3 2.5 1996 2.37 18.26 3B2 3-4 3.5 1987 2.12 15.92 3B2 4-5 4.5 1979 1.11 8.69 3B2 5-6 5.5 1971 1.77 11.45 3B2 6-7 6.5 1962 1.84 12.91 3B2 7-8 7.5 1954 1.81 12.77 3B2 8-9 8.5 1945 1.67 11.41 3B2 9-10 9.5 1937 1.51 11.22 3B2 10-11 10.5 1928 1.81 11.68 3B2 11-12 11.5 1920 1.53 10.60 3B2 12-13 12.5 1911 1.36 11.31 3B2 13-14 13.5 1903 1.70 11.94 3B2 14-15 14.5 1895 1.89 13.04 3B2 15-16 15.5 1886 1.74 12.13 3B2 16-17 16.5 1878 1.42 10.51 3B2 17-18 17.5 1869 1.30 9.86 3B2 18-19 18.5 1861 1.29 9.22 3B2 19-20 19.5 1852 1.37 9.53 3B2 20-21 20.5 1844 1.48 9.87 3B2 21-22 21.5 1835 1.78 12.59 3B2 22-23 22.5 1827 1.65 10.68 3B2 23-24 23.5 1819 1.46 8.97 3B2 24-25 24.5 1810 1.14 7.00 3B2 25-26 25.5 1802 1.31 8.20 3B2 26-27 26.5 1793 1.58 10.71 Authors: Elena Argiriadis, Luisa Poto, Ilaria Baneschi, Carlo Barbante Project ref. number 641762 Project title ECOPOTENTIAL: IMPROVING FUTURE ECOSYSTEM BENEFITS THROUGH EARTH OBSERVATIONS Changes in the hydrologic aspects of climate are of optimum importance. However, the details of past changes in the hydrologic cycle are difficult to reconstruct. In this reportwe show the firs results of the analyses of paleohydrologicalproxies(n-alkanes)that allow the reconstruction of multiple terms of the hydrologic budgetin the GPNP. We analyzed a core from Lake Trebecchi (GPNP), and after the definition of the age-dating chronology, we measured the concentrations of n-alkanes and their major indexes (ACL, Paq, C27/C31) usually selected to infer information about hydrological evolution of the ecosystems.