Applied Physics B

, Volume 110, Issue 2, pp 241–248 | Cite as

Wireless laser spectroscopic sensor node for atmospheric CO2 monitoring—laboratory and field test

  • C. J. Smith
  • S. So
  • L. Xia
  • S. Pitz
  • K. Szlavecz
  • D. Carlson
  • A. Terzis
  • G. Wysocki
Article

Abstract

We developed a low-power, portable, wireless laser spectroscopic sensor for atmospheric CO2 monitoring. The sensor is based on tunable diode laser absorption spectroscopy with a 2-μm wavelength VCSEL as a source and wavelength modulation technique for spectroscopic signal detection. The sensor allows measurement of CO2 concentration changes with a 1σ sensitivity of 0.14 ppmv Hz−1/2. This sensor was both laboratory and field tested under varying environmental conditions. It was used to measure a soil respiration rate of topsoil in the lab and of forest floors in the field. Measurement results are compared with those of commercial non-dispersive infrared sensors and very good agreement is found.

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • C. J. Smith
    • 1
  • S. So
    • 1
    • 2
  • L. Xia
    • 3
  • S. Pitz
    • 3
  • K. Szlavecz
    • 3
  • D. Carlson
    • 4
  • A. Terzis
    • 4
  • G. Wysocki
    • 1
  1. 1.Department of Electrical EngineeringPrinceton UniversityPrincetonUSA
  2. 2.Sentinel Photonics Inc.Monmouth JunctionUSA
  3. 3.Department of Earth and Planetary SciencesThe Johns Hopkins UniversityBaltimoreUSA
  4. 4.Department of Computer ScienceThe Johns Hopkins UniversityBaltimoreUSA

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