@article{oai:u-ryukyu.repo.nii.ac.jp:02005679,
 author = {Uemura, Ryu and Barkan, Eugeni and Abe, Osamu and Luz, Boaz and 植村, 立},
 journal = {Geophysical Research Letters},
 month = {Feb},
 note = {Recently, an excess of ^<17>O (^<17>O-excess) has been demonstrated in meteoric water and ice cores. Based on theory and experiments, it has been suggested that this excess originates from evaporation of ocean water into under-saturated air. However, there has never been direct demonstration of this excess in marine vapor. Here, we present results of the first measurements of δ^<17>O and δ^<18>O in vapor samples collected over the South Indian and the Southern Oceans. Our data show the existence of ^<17>O-excess in marine vapor and also clear negative correlation between ^<17>O-excess and relative humidity. Thus, ^<17>O-excess is useful for constraining oceanic humidity in hydrological and climatic models. Using the obtained values of ^<17>O-excess, we estimated the fractionation factor between H_2^<18>O and H_2^<16>O for diffusion in air above the ocean (^<18>α_<diff>). The new estimation of ^<18>α_<diff> (1.008) is larger than the widely accepted value in hydrological studies., 論文},
 title = {Triple isotope composition of oxygen in atmospheric water vapor},
 volume = {37},
 year = {2010}
}