ozone layer yokan ozonosphere layer (maqqa yeroo bayye hin fayyadatamne), kutta lafaa kan ozone (O3) bayye qabu dha. ""Relatively high"" (million kessa waan diqqo qabachu) yoo ta'u, atmosferra jalatti argamu calla walitti kan qabame ta'ulle yoo kuttalle atmosferra durra wajjin walitti ilallani walitti-kufama (concentration) bayye diqqa qaba. Bayyinan kan argamu jalla stratosphere yoo ta'u tilmamaan 15 km hangaa 35 km laffa irra olii ka'e argama. Ji'a ji'anni fi bakka bakkan furdinni ozone jijjirama demma. Ozone layeriin kanitti argamme bara 1913 Physicst French Charles Fabry fi Henri Buisson jedhamaniin. Fakkii fi qabenyi ozone ballinan kan iffa ta'e British meteorologist G. M. B. Dobson jedhamu kan spectrophotometer salpha midhasee. Meshan kunis stratospheric ozone lafa irra akka lakka'an qarqarra. Bara 1928 fi 1958 jiddutti Dobsoniin network adunya kan ta'e station wa'e ozone hojjattu dhabee, stationii kunis hanga amma ni hojjatta. ""Dobson unit"" kan jedhamu unitiin lakka bayyina ozone maqqa isaan moggafame.