Applied Physics B

, Volume 85, Issue 2, pp 397–406

A water isotope (2H, 17O, and 18O) spectrometer based on optical feedback cavity-enhanced absorption for in situ airborne applications

  • E.R.T. Kerstel
  • R.Q. Iannone
  • M. Chenevier
  • S. Kassi
  • H.-J. Jost
  • D. Romanini
Article

DOI: 10.1007/s00340-006-2356-1

Cite this article as:
Kerstel, E., Iannone, R., Chenevier, M. et al. Appl. Phys. B (2006) 85: 397. doi:10.1007/s00340-006-2356-1

Abstract

Measurements of the isotopic composition of water are thought to help explain stratospheric aridity and related issues in atmospheric sciences. Simultaneous in situ measurements of 2H/1H, 17O/16O, and 18O/16O at high spatial resolution are required for this purpose. We present the design and laboratory performance of a device that will be used on high-altitude research aircraft. It is based on optical feedback cavity-enhanced spectroscopy (OF-CEAS), with better sensitivity than traditional multi-pass arrangements. It utilizes a near-infrared laser source, avoiding the need for cryogens. We demonstrate an airborne precision during tropospheric flight conditions of 1 ‰, 3 ‰, and 9 ‰ for δ18O, δ17O, and δ2H, respectively, for 30-s averaged data and a water concentration of about 200 ppm. With recent improvements we expect to remain within a factor of about three of these values under true stratospheric conditions (water mixing ratio ∼10 ppmv).

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • E.R.T. Kerstel
    • 1
  • R.Q. Iannone
    • 1
  • M. Chenevier
    • 2
  • S. Kassi
    • 2
  • H.-J. Jost
    • 3
  • D. Romanini
    • 2
  1. 1.Department of Physics, Center for Isotope ResearchUniversity of GroningenGroningenThe Netherlands
  2. 2.Laboratoire de Spectrométrie Physique, CNRS UMR5588Université Joseph Fourier GrenobleSaint Martin d’HèresFrance
  3. 3.Bay Area Environmental Research InstituteSonomaUSA

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