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Modification of Tracegas Scenarios

Modification of Tracegas Scenarios Brapho Box/Slimcat CTM derived stratospheric climatology (Marco Bruns) SZA and albedo dependence of photochemistry tropospheric modification introduced constant tropospheric O3 number density profile (all) biomass burning/ biogenic emission (5N, July)

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Modification of Tracegas Scenarios

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  1. Modification of Tracegas Scenarios • Brapho Box/Slimcat CTM derived stratospheric climatology (Marco Bruns) • SZA and albedo dependence of photochemistry • tropospheric modification introduced • constant tropospheric O3 number density profile (all) • biomass burning/ biogenic emission (5N, July) • H2CO 2ppb < 3 km (may affect BrO fit) • NO2 taken from MPI-2D CTM • O3 doubled < 5 km • free tropospheric BrO (55N, April) • BrO 1ppt < 10 km (Fitzenberger et al., 2001) • PBL BrO explosion (75S, October) • BrO 50ppt < 2 km • O3 0ppm < 2 km • 24 trace gas profile scenarios

  2. Tracegas scenarios: total column O3 NO2 BrO OClO file [DU] [1019/m2] [1018/m2] [1016/m2] 9610am_lat18N_lon300_SZA40_a10.tg 252 1.944 0.180 0.095 9610am_lat18N_lon300_SZA40_a90.tg 250 1.704 0.187 0.088 9610am_lat55N_lon300_SZA69_a10.tg 276 1.796 0.267 0.249 9610am_lat55N_lon300_SZA69_a90.tg 275 1.712 0.277 0.245 9610am_lat77N_lon000_SZA86_a10.tg 262 0.952 0.324 0.498 9610am_lat77N_lon000_SZA86_a90.tg 262 0.945 0.327 0.495 9610am_lat77S_lon000_SZA90_a10.tg 152 1.539 3.174 4.261 PBL BrO / high OClO/ 9610am_lat77S_lon000_SZA90_a90.tg 151 1.549 3.172 3.947 ozone hole 9701am_lat18N_lon300_SZA50_a10.tg 219 1.844 0.177 0.090 9701am_lat18N_lon300_SZA50_a90.tg 218 1.647 0.182 0.085 9701am_lat55N_lon000_SZA80_a10.tg 288 1.136 0.285 0.347 9701am_lat55N_lon000_SZA80_a90.tg 288 1.114 0.289 0.341 9704am_lat18N_lon300_SZA40_a10.tg 250 2.016 0.173 0.088 9704am_lat18N_lon300_SZA40_a90.tg 247 1.781 0.180 0.081 9704am_lat55N_lon300_SZA49_a10.tg320 2.4780.3880.163 free tropospheric BrO 9704am_lat55N_lon300_SZA49_a90.tg319 2.2500.4140.162 9704am_lat77N_lon000_SZA69_a10.tg 294 2.889 0.211 0.187 9704am_lat77N_lon000_SZA69_a90.tg 293 2.769 0.229 0.194 9707am_lat18N_lon300_SZA41_a10.tg 285 2.420 0.197 0.094 biomass burning 9707am_lat18N_lon300_SZA41_a90.tg 282 2.171 0.206 0.089 9707am_lat55N_lon300_SZA39_a10.tg 311 3.424 0.234 0.117 9707am_lat55N_lon300_SZA39_a90.tg 309 3.050 0.270 0.118 9707am_lat77N_lon000_SZA59_a10.tg 292 4.235 0.208 0.077 9707am_lat77N_lon000_SZA59_a90.tg 290 3.918 0.238 0.077

  3. Antarctic Ozone hole (77S, Oct 1996) • Ozone „hole“ profile (151 DU) • zero surface ozone • 50 ppt BrO < 2km (BrO explosion) • stratospheric maximum at 16-17 km

  4. Antarctic Ozone Hole (Part II) • High OClO • Free tropospheric BrO (55N, Apr) • 1 ppt BrO < 10 km

  5. Biomass burning (18N, July) • Formaldehyde 2ppb < 3 km • troposperic NO2 from MPI-2D

  6. Conclusions: • more realistic scenarios developed • CDI simulation repeated (see ftp server) • basic and SNR error assessment with new scenarios Biomass burning (Part II) • tropospheric O3 doubled <5 km

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