Column observations of stratospheric gases at Sondre Stromfjord, Greenland during winter 1994-1995

As part of the Second European Stratospheric Arctic and Mid-latitude Experiment (SESAME) field campaign, observations were made during the period from October 1994 to April 1995 at Sondre Stromfjord, Greenland (67°N, 53°W). Using a Fourier transform spectrometer, high resolution (0.06 cm^-1) infrared spectra were recorded with the sun as a radiation source. Column amounts of trace gases including HCl, HF, HNO₃, N₂O and O₃ are shown for five time periods during the course of the 1994-95 Arctic winter. Results are compared with lower stratospheric potential vorticity fields to describe variations in trace gas column amounts.