Lai, Chun-Ta DataONE 2015 water vapor oxygen isotopes hydrogen isotopes deuterium excess old growth coniferous forests Pacific Northwest laser spectrascopy Lai, Chun-Ta National Science Foundation, Division of Atmospheric and Geospace Sciences http://www.sci.sdsu.edu/biomet/pmwiki.php/PmWiki/Home Dataset 1333357 Creative Commons Public Domain Dedication (CC0) This dataset includes stable oxygen and hydrogen isotope ratios of near-surface water vapor measured at Wind River Field Station, WA, USA (45.8205N, 121.9519W, 371m asl). Near-continuous hourly averages are available from 3 heights (1m, 10m and 60m above ground) for the entire year in 2012. General findings learned from this dataset have been published at 2013 AGU Fall meeting (Linking evapotranspiration, boundary-layer processes and atmospheric moisture using isotope tracer modeling and data, #A51B-0024). High-precision isotope data were made possible by an off-axis cavity-enhanced absorption spectroscopy analyzer (Los Gatos Research). Data correction and quality control follow the protocol described by Rambo et al. (2011) Journal of Atmospheric and Oceanic Technology, 28(11), 1448-1457, doi:10.1175/JTECH-D-11-00053.1. AGS-0956425