1. [Untitled]
- Author
-
Klaus Gollinger, Michael Roncossek, Veit Bürger, Frank Arnold, Stefan Spreng, and Johannes Schneider
- Subjects
Atmospheric Science ,chemistry.chemical_compound ,Ozone ,Altitude ,Denitrification ,chemistry ,Arctic ,Nitric acid ,Environmental Chemistry ,Sedimentation ,Atmospheric sciences ,Stratosphere ,Aerosol - Abstract
Gaseous nitric acid (HNO3) and hydrogene fluoride (HF) have been measured in the winter Arctic stratosphere using balloon- and aircraft-based Ion Molecule Reaction Mass Spectrometry (IMRMS) instruments. Strong HNO3 perturbations were found in 1993 and 1995 which may indicate nitrification around 11-13 km and denitrification around 20 km altitude. Most likely these perturbations were caused by sedimentation of HNO3 containing aerosols followed by aerosol evaporation at lower altitudes.
- Published
- 1998