caa a22 4500 477061273 CHVBK 20180405111401.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00055158 doi (NATIONALLICENCE)springer-10.1007/BF00055158 Boundary-layer ozone depletion as seen in the Norwegian Arctic in spring [Elektronische Daten] [Sverre Solberg, Norbert Schmidbauer, Arne Semb, Frode Stordal, Øystein Hov] Several years of measurements of ozone, hydrocarbons, sulphate and meteorological parameters from Spitsbergen in the Norwegian Arctic are presented. Most of the measurements were taken on the Zeppelin Mountain at an altitude of 474 m a.s.l. The focus is the episodes of ozone depletion in the lower troposphere in spring, which are studied in a climatological way. Episodes of very low ozone concentrations are a common feature on the Zeppelin Mountain in spring. The low ozone episodes were observed from late March to the beginning of June. When the effect of transport direction was subtracted, the frequenty of the low ozone episodes was found to peak in the beginning of May, possibly reflecting the seasonal cycle in the actual depletion process. Analyses based on trajectory calculations show that most of the episodes occurred when the air masses were transported from W-N. Ozone soundings show that the ozone depletion may extend from the surface and up to 3-4 km altitude. The episodes were associated with a cold boundary layer beneath a thermally stable layer, suppressing mixing with the free troposphere. The concentration of several individual hydrocarbons was much lower during episodes of low ozone than for the average conditions. The change in concentration ratio between the hydrocarbons was in qualitative agreement with oxidation of hydrocarbons by Br and Cl atoms rather than by OH radicals. Kluwer Academic Publishers, 1996 tropospheric ozone nationallicence Arctic nationallicence hydrocarbons nationallicence halogens nationallicence Solberg Sverre Norwegian Institute for Air Research, P.O. Box 100, N-2007, Kjeller, Norway aut Schmidbauer Norbert Norwegian Institute for Air Research, P.O. Box 100, N-2007, Kjeller, Norway aut Semb Arne Norwegian Institute for Air Research, P.O. Box 100, N-2007, Kjeller, Norway aut Stordal Frode Norwegian Institute for Air Research, P.O. Box 100, N-2007, Kjeller, Norway aut Hov Øystein Department of Geophysics, University of Bergen, Allégt. 70, N-5007, Bergen, Norway aut Journal of Atmospheric Chemistry Kluwer Academic Publishers; gopher://gopher.wkap.nl 23/3(1996-03-01), 301-332 0167-7764 23:3<301 1996 23 10874 https://doi.org/10.1007/BF00055158 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00055158 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Solberg Sverre Norwegian Institute for Air Research, P.O. Box 100, N-2007, Kjeller, Norway aut NATIONALLICENCE 700 1- Schmidbauer Norbert Norwegian Institute for Air Research, P.O. Box 100, N-2007, Kjeller, Norway aut NATIONALLICENCE 700 1- Semb Arne Norwegian Institute for Air Research, P.O. Box 100, N-2007, Kjeller, Norway aut NATIONALLICENCE 700 1- Stordal Frode Norwegian Institute for Air Research, P.O. Box 100, N-2007, Kjeller, Norway aut NATIONALLICENCE 700 1- Hov Øystein Department of Geophysics, University of Bergen, Allégt. 70, N-5007, Bergen, Norway aut NATIONALLICENCE 773 0- Journal of Atmospheric Chemistry Kluwer Academic Publishers; gopher://gopher.wkap.nl/ 23/3(1996-03-01), 301-332 0167-7764 23:3<301 1996 23 10874 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer