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 Strat-trop exchange in GCC_13.4.0-rc.4 for year 2019
 (i.e. species flux across 100 hPa)

 Units: Tg/yr

 Annual mean is weighted by the number of days per month
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                     O3
Jan 2019       823.8837
Feb 2019       729.8216
Mar 2019       518.9280
Apr 2019       559.2634
May 2019       375.9737
Jun 2019       390.8281
Jul 2019       399.3324
Aug 2019       530.1617
Sep 2019       679.7860
Oct 2019       519.4788
Nov 2019       652.8981
Dec 2019       471.7464
Annual Mean    552.7203