More specifically, lower atmospheric humidity causes higher vapor pressure gradient between leaf interstitial space and the atmosphere, resulting in a preferential loss of lighter isotopes and consequent enrichment in δ18O of leaf water.
The isotopic composition of the leaf water originating from soil moisture is subsequently modulated by its transpiration through the stomata, leading to the preferential loss of the lighter isotope (16O) and the consequent enrichment of the leaf water 18O. During the transpiration process, lower relative humidity increases the δ18O of the leaf water.

estimate of lake residence time from mass balance modelling (Jones et al., 2005)
lake residence time claculations

Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Holocene changes in eastern equatorial Atlantic salinity as estimated by water isotopologues
Intra-annual variation in the stable oxygen and carbon and trace element composition of sclerosponges
Intra-annual variation in the stable oxygen and carbon and trace element composition of sclerosponges
Intra-annual variation in the stable oxygen and carbon and trace element composition of sclerosponges