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 Strat-trop exchange in GCC_13.4.0-rc.3 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       825.6028
Feb 2019       729.3366
Mar 2019       517.9357
Apr 2019       557.8466
May 2019       374.3146
Jun 2019       388.1216
Jul 2019       395.9089
Aug 2019       525.8164
Sep 2019       669.6259
Oct 2019       511.4953
Nov 2019       650.8528
Dec 2019       471.5046
Annual Mean    549.9034