4/14 2014 – Gainesville, Florida:
High altitude atmospheric data shows no conditions of near saturated relative humidity exists at flight levels above 29,000 feet (8,841 meters) to explain formation of persistent contrails and/or persistent-spreading contrails in this example.
The absence of near-saturated relative humidity points to release of non water vapor jet emissions as deliberate and covert deployment of aerosols into the troposphere. *
Relative humidity is the amount of moisture in the air compared to what the air can “hold” at that temperature. When the air can’t “hold” all the moisture, then it condenses as dew. (Dew Point) **