A new cavity based absorption instrument for detection of water isotopologues in the upper troposphere and lower stratosphere.

@article{Sayres2009ANC,
  title={A new cavity based absorption instrument for detection of water isotopologues in the upper troposphere and lower stratosphere.},
  author={David S. Sayres and Elisabeth J. Moyer and Thomas F. Hanisco and Jason M St Clair and Frank N. Keutsch and Allen O'brien and Nathan T Allen and L. B. Lapson and J. N. Demusz and Mercedes Rivero and Tanja Martin and Mark Greenberg and C. Tuozzolo and Gregory S Engel and Jesse H Kroll and Joshua B Paul and J. G. Anderson},
  journal={The Review of scientific instruments},
  year={2009},
  volume={80 4},
  pages={044102}
}
We describe here the Harvard integrated cavity output spectroscopy (ICOS) isotope instrument, a mid-IR infrared spectrometer using ICOS to make in situ measurements of the primary isotopologues of water vapor (H(2)O, HDO, and H(2) (18)O) in the upper troposphere and lower stratosphere (UTLS). The long path length provided by ICOS provides the sensitivity and accuracy necessary to measure these or other trace atmospheric species at concentrations in the ppbv range. The Harvard ICOS isotope… CONTINUE READING
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