Field data of hydrogen peroxide concentrations in urban and mountain air in southwestern Poland

The concentrations of ambient gas-phase hydrogen peroxide were measured during the summer of 1998, 1999 and 2000. The experiments were performed in the city of Wroclaw and in the vicinity of Mount Szrenica, 1362 m a. s. l., Poland. Analysis was carried out by the chemiluminescence method. Typical mean ranges of 30 min H2O2 concentrations measured were 1.4 - 6.0 mug m(-3) at Mount Szrenica, whereas in the urban atmosphere H2O2 concentrations were in the range of 2.7 - 11.7 mug m(-3). In the case of the urban atmosphere, H2O2 concentrations were well correlated only with solar radiation and temperature. In the mountain air, H2O2 concentrations increased along with the increase of temperature, O-3, CO and the decrease of humidity. The diurnal variation was not only caused by photochemical processes.