Sentences with phrase «stratospheric water vapour comes»

Stratospheric water vapour comes from two sources — the uplift of tropospheric water through the very cold tropical tropopause (both as vapour and as condensate), and the oxidation of methane in the upper stratosphere (CH4 +2 O2 — > CO2 + 2H2O NB: this is just a schematic, the actual chemical pathways are more complicated).