Long term atmosphere-surface transfer studies in Salento Peninsula: a database.

The micrometeorological base of CNR-ISAC in Lecce, South-East of Italy, is active since 2002, in collecting experimental data about surface-atmosphere transfer of momentum heat and water vapour. It operates in a suburban site inside the Salento University campus and has been improved along the past years to give a quite complete description of the soil-atmosphere vertical transfer. It is composed by a 16 m mast with fast response (eddy correlation) instrumentation and an ancillary automatic meteorological station collecting also soil data at 2 levels depth. Fast response data are pre-processed in half-hour averaged statistics. All collected data are available in a web database (www.basesperimentale.le.isac.cnr.it) and represent a unique long-term daily updated dataset for microclimate and soil use changes studies in southern Italy. Here some preliminary results about the evolution of the surface water budget in the last years are presented. The Lecce data base has been a pilot reference structure for the Climate Change Section of the CNR-DTA GIIDA project (National Research Council - Earth and Environment Department, Interdisciplinary and Interoperative Management of Environmental Data). It is also a data provider for the HYMEX project database (Hydrological Mediterranean Experiment, www.hymex.org).