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Operational considerations to improve total ozone measurements with a Microtops II ozone monitor [Discussion paper]
Title: Operational considerations to improve total ozone measurements with a Microtops II ozone monitor [Discussion paper]
Authors: Gómez Amo, José LuisEstellés Leal, VíctorDi Sarra, Alcide GiorgioPedrós, RobertoUtrillas, María PilarMartínez Lozano, José AntonioGonzález Frías, CarlosKyrö, EskoVilaplana Guerrero, José Manuel
Keywords: Ozone monitor; Ultraviolet solar radiation; Total column ozone; Sunphotometer; Microtops II
Issue Date: 2011
Publisher: European Geosciences Union
Citation: Atmospheric Measurement Techniques Discussions. 2011, 4, p. 4, 7529–7558
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Abstract: A Microtops II “ozone monitor” with UV channels centered at 305.5, 312.5, and 320 nm has been used routinely in six experimental campaigns carried out in several geographic locations and seasons, covering latitudes from 35 to 68◦ N during the last ten years (2001–2011). The total ozone content is retrieved by Microtops II by using different combinations (Channel I, 305.5/312.5 nm; Channel II, 312.5/320 nm; and Channel III, 305.5/312.5/320 nm) of the signals at the three ultraviolet wavelengths. When a calibration was used and the airmass limit was fixed to 3, Microtops II produce mean relative deviations with respect to the Brewer of 0.1, −11, and 8 % respectively for the Channel I, Channel II, and Channel III retrieval. The performance of the Microtops retrieval has been stable during the last ten years. Channel I represents the best option to determine the instantaneous total ozone content. Channel II and III values appear weakly sensitive to temperature, ozone content, and aerosols. Channel II is more stable than Channel I for airmasses larger than 2.6. The conclusions do not show any dependence on latitude and season.
Sponsorship : This study was possible thanks to a postdoctoral fellowship funded by the Generalitat Valenciana in the case of J. L. Gomez Amo (in the framework of “Estancies post- doctorals en centres de Excellencia de la Comunitat Valenciana” programme) and a Juan de la Cierva research contract (JCI-2009-04455) in the case of V. Estellés, funded by the Spanish Ministry of Science and Innovation (MICINN). This work was also supported by the MICINN projects CGL2007-60648 and CGL2009-07790, and by the Valencian Autonomous Government through the Project PROMETEO/2010/064.
ISSN: 1867-8610
Appears in Collections:Artículos científicos 2010-2014

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