1st approach: Regression methods, employing vertical profiles of temperature and humidity derived from satellite data and results of a regional climate model
1. Analysis of all available observational data for the Mediterranean and Black Sea
2. Investigation of the use of modelled data over Black Sea area, in order to supplement the available information on moisture distribution and variability
3. Derivation of a regression model for the near-surface water vapour mixing ratio using satellite-derived data and evaluation of model performances against an independent dataset
2nd approach: Use of a Look-Up Table procedure for estimation of statistical characteristics of distribution of near-surface water vapor.