The optimal instrument to identify links that characterizes inter-secular climatic fluctuations according to Vanghenghem-Ghirs type of circulation can be Informational Systems. This instrument allows operative access to databases in Access, Excel and Statgrphics Plus programs where data is stocked and processed statistically as well as interpolation of thermal anomalies in regualar cartographic network in Surfer, MapInfo, ArcView programs and others. Investigations results obtained through informational Systems allow claiming that thermal regime variability is in close connection with changes in thermal anomaly “warm-cold” frequency correlation and circulation’s type transfer from one period to another.

Keywords: thermal anomaly, atmospherical circulation,  interpolation, variability