Further studies with a diffraction grating spectrometer have more definitively affirmed the identification of barium in the atmosphere as a result of aircraft aerosol activities. All research conducted so far continues to indicate a unique match to the element of barium. Additional work that has been completed also eliminates further candidates from the periodic table as being in the atmosphere. Three progressions of logic to support the identification of barium in the atmosphere are discussed in this paper.
The unusual presence of the element barium in the atmosphere now appears to have been affirmed through the methods of spectroscopy. The results of current research are no sufficient to establish an analytical basis for the formal investigation of radical atmospheric changed induced by relatively recent aircraft aerosol operations. This Carnicom work further confirms the recent findings that have substantiated the unusual presence of an alkaline salt form in the atmosphere, as revealed through recent pH tests conducted around the country.