Abstract:Abstract. Knowledge about the long-term average soil evaporation, especially the ratio of evaporation to precipitation (f), is important for assessing the total available water resources. However, determining the long-term f remains technically challenging because soil evaporation is highly dynamic. Here we hypothesize that the stable isotopes (2H and 18O) of deep soil water preserve the long-term evaporation effects on precipitation and can be used to estimate long-term f. Our results showed that the deep soi… Show more
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