Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/20.500.11765/9317
Sensitivity study of the instrumental temperature corrections on Brewer total ozone column measurements
Título : Sensitivity study of the instrumental temperature corrections on Brewer total ozone column measurements
Autor : Berjón, Alberto; Redondas, Alberto; Sildoja, Meelis-Mait; Nevas, Saulius; Wilson, Keith M.; León-Luis, Sergio F.; el-Gawhary‏, Omar‏; Fountoulakis, Ilias
Palabras clave : Total ozone column; Instrumental temperature corrections; Brewer spectrophotometers; Ozone measurements
Fecha de publicación : 2018
Editor: European Geosciences Union
Citación : Atmospheric Measurement Techniques. 2018, 11(6), p. 3323–3337
Versión del editor: https://dx.doi.org/10.5194/amt-11-3323-2018
Resumen : The instrumental temperature corrections to be applied to the ozone measurements by the Brewer spectrophotometers are derived from the irradiance measurements of internal halogen lamps in the instruments. These characterizations of the Brewer spectrophotometers can be carried out within a thermal chamber, varying the temperature from -5 to +45ºC, or during field measurements, making use of the natural change in ambient temperature. However, the internal light source used to determine the thermal sensitivity of the instrument could be affected in both methods by the temperature variations as well, which may affect the determination of the temperature coefficients. In order to validate the standard procedures for determining Brewer’s temperature coefficients, two independent experiments using both external light sources and the internal halogen lamps have been performed within the ATMOZ Project. The results clearly show that the traditional methodology based on the internal halogen lamps is not sensitive to the temperature-caused changes in the spectrum of the internal light source. The three methodologies yielded equivalents results, with differences in total ozone column below 0.08% for a mean diurnal temperature variation of 10ºC.
Patrocinador: This work has been supported by the European Metrology Research Programme (EMRP) within the joint research project ENV59 “Traceability for atmospheric total column ozone” (ATMOZ).
URI : http://hdl.handle.net/20.500.11765/9317
ISSN : 1867-8548
Colecciones: Artículos científicos 2015-2018

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