National and Kapodistrian University of Athens, Academy of Athens, affiliation not provided to SSRN, Yuriy Fedkovych Chernivtsi National University - Department of Physical Geography, Agricultural University of Athens, affiliation not provided to SSRN, affiliation not provided to SSRN, Università degli Studi di Sassari, affiliation not provided to SSRN, Academy of Athens, Academy of Athens, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN and Academy of Athens