Forests and Weather: Can't see the clouds for the trees ?

Environmental scientists have been able to correlate rainfall and temperature patterns with large forest growth for many years however the exact role of forests in the regulation of temperature as well as with the formation of water molecules remains a matter of conjecture. One proposition, of several possible theories, which has garnered strong support  originates from the University of Helsinki and formulates a possible feedback loop exists from trees to aerosol particles. Many plants produce a group of chemicals termed 'Terpenes'. Terpenes are familiar to most people as the smell of pine forests and are the main constituents of turpentine. As terpene molecules are highly volatile the process of oxidisation is theorised to make them less volatile leading to condensation into aerosol particles which have a cooling effect. If this is the case, then the steady deforestation of the planet, through logging/land clearing, weather patterns and outbreaks of disease in trees portents another negative impact on planetary-wide temperature and rainfall patterns.