Thin laser beam wandering and intensity fluctuations method for evapotranspiration measurement

Antonin Poisson, Angel Fernandez, Dario G. Perez, Regis Barille, Jean Charles Dupont

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We compare in this study two simple optical setups to measure the atmospheric turbulence characterized by the refractive index structure parameter Cn2. The corresponding heat flux values sensed by the laser beam propagation are calculated leading to the plant evapotranspiration. The results are discussed and compared to measurements obtained with a well-known and calibrated eddy-covariant instrument. A fine analysis gives a good insight of the accuracy of the optical devices proposed here to measure the crop evapotranspiration. Additional evapotranspiration values calculated with meteorological sensor data and the use of different models are also compared in parallel.

Original languageEnglish
Pages (from-to)33-40
Number of pages8
JournalOptics and Laser Technology
Volume80
DOIs
StatePublished - Jun 2016
Externally publishedYes

Keywords

  • Atmospheric turbulence
  • Beam wandering
  • Evapotranspiration
  • Laser scintillation

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