Figure 7

The figure shows the process used in the model calculation under section 2.7. Observed values of SST, wind speed, rhs, δ18O in sea water [δ18Osw] over different latitudes are used as the initial condition for the water vapor isotopic composition of surface evaporative flux [δ18Owv]. The rainout fraction [f ] is used to find the rainwater isotopic composition and the remnant water vapor. The ambient vapor is the vapor collected during sampling [δ18OObs] which includes the evaporated, transported and recycled components.