The Chemical Behaviour and Deposition of Ammonium Nitrate, Nitric Acid and Ammonia

The TRACT experiment and the BIVOTEX studies at the Bavarian Forest site offered the possibility of investigating the composition and deposition behaviour of aerosol particles and gaseous compounds above and within tall vegetation (spruce forest with 14% beech) and in an agricultural area in the Rhine valley. During the intensive field campaign of TRACT a study was also performed on the thermodynamic behaviour of the chemically coupled system HNO3−NH3−NH4NO3 with respect to the phase transition and dry deposition or/and emission.