caa a22 4500 47706129X CHVBK 20180405111401.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00055155 doi (NATIONALLICENCE)springer-10.1007/BF00055155 The annual cycle of peroxides and ozone in marine air at Cape Grim, Tasmania [Elektronische Daten] [G. Ayers, S. Penkett, R. Gillett, B. Bandy, I. Galbally, C. Meyer, C. Elsworth, S. Bentley, B. Forgan] The concentration of gas-phase peroxides has been measured almost continuously at the Cape Grim baseline station (41° S) over a period of 393 days (7702 h of on-line measurements) between February 1991 and March 1992. In unpolluted marine air a distinct seasonal cycle in concentration was evident, from a monthly mean value of>1.4 ppbv in summer (December) to <0.2 ppbv in winter (July). In the summer months a distinct diurnal cycle in peroxides was also observed in clean marine air, with a daytime build-up in concentration and decay overnight. Both the seasonal and diurnal cycles of peroxides concentration were anticorrelated with ozone concentration, and were largely explicable using a simple photochemical box model of the marine boundary layer in which the central processes were daytime photolytic destruction of ozone, transfer of reactive oxygen into the peroxides under the low-NOx ambient conditions that favour self-reaction between peroxy radicals, and continuous heterogeneous removal of peroxides at the ocean surface. Additional factors affecting peroxides concentrations at intermediate timescales (days to a week) were a dependence on air mass origin, with air masses arriving at Cape Grim from higher latitudes having lower peroxides concentrations, a dependence on local wind speed, with higher peroxides concentrations at lower wind speeds, and a systematic decrease in peroxides concentration during periods of rainfall. Possible physical mechanisms for these synoptic scale dependencies are discussed. Kluwer Academic Publishers, 1996 photochemistry nationallicence hydrogen peroxide nationallicence ozone nationallicence Cape Grim nationallicence Tasmania nationallicence Ayers G. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut Penkett S. School of Environmental Sciences, University of East Anglia, NR4 7TJ, Norwich, England aut Gillett R. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut Bandy B. School of Environmental Sciences, University of East Anglia, NR4 7TJ, Norwich, England aut Galbally I. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut Meyer C. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut Elsworth C. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut Bentley S. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut Forgan B. Bureau of Meteorology, Box 1289K, 3001, Melbourne, Australia aut Journal of Atmospheric Chemistry Kluwer Academic Publishers; gopher://gopher.wkap.nl 23/3(1996-03-01), 221-252 0167-7764 23:3<221 1996 23 10874 https://doi.org/10.1007/BF00055155 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00055155 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ayers G. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut NATIONALLICENCE 700 1- Penkett S. School of Environmental Sciences, University of East Anglia, NR4 7TJ, Norwich, England aut NATIONALLICENCE 700 1- Gillett R. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut NATIONALLICENCE 700 1- Bandy B. School of Environmental Sciences, University of East Anglia, NR4 7TJ, Norwich, England aut NATIONALLICENCE 700 1- Galbally I. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut NATIONALLICENCE 700 1- Meyer C. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut NATIONALLICENCE 700 1- Elsworth C. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut NATIONALLICENCE 700 1- Bentley S. Division of Atmospheric Research, CSIRO, Private Bag 1, 3195, Mordialloc, Vic, Australia aut NATIONALLICENCE 700 1- Forgan B. Bureau of Meteorology, Box 1289K, 3001, Melbourne, Australia aut NATIONALLICENCE 773 0- Journal of Atmospheric Chemistry Kluwer Academic Publishers; gopher://gopher.wkap.nl/ 23/3(1996-03-01), 221-252 0167-7764 23:3<221 1996 23 10874 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer