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Soil Science Society of America Journal Abstract - LANDSCAPE MANAGEMENT

Near-Infrared Spectroscopy to Estimate the Maximum Temperatures Reached on Burned Soils


This article in SSSAJ

  1. Vol. 71 No. 3, p. 1029-1037
    Received: May 12, 2006

    * Corresponding author(s): cesar.guerrero@umh.es
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  1. César Guerrero *,
  2. Jorge Mataix-Solera,
  3. Victoria Arcenegui,
  4. Jorge Mataix-Beneyto and
  5. Ignacio Gómez
  1. GEA (Grupo de Edafología Ambiental), Dep. de Agroquímica y Medio Ambiente, Universidad Miguel Hernández. Avda. de la, Universidad s/n, E-03202 Elche, Spain


We studied the use of near-infrared (NIR) reflectance spectroscopy as a potential method to estimate a posteriori the maximum temperatures reached (MTR) on burned soils. When soils are heated, the NIR spectra change in accordance with the MTR. Thus, after calibrating, these patterns of NIR could be used as a fingerprint to estimate the MTR in burned soils. Successful validations of the models relating NIR spectra with MTR were obtained in each of the five soils studied (local models), with r 2 values ranging from 97.47 to 98.56%. A global model constructed with samples from the five soils studied obtained a similar accuracy, suggesting the presence in soils of some NIR-detectable compounds with similar thermal sensitivity. The influence of the variability caused by the soil type and the duration of heating during model constructions is also evaluated and discussed. The use of NIR presents interesting advantages, such as low cost, low time consumption, minimal pretreatment of samples, no need for chemicals, and accuracy. The results indicate that the MTR could be estimated in burned soils with NIR, offering a new perspective on studies of wildfire effects on soils.

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