Diurnal variability of total ozone column over Madrid (Spain) |
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| Authors: | M Antón M López A Serrano M Bañón JA García |
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| Institution: | 1. Departamento de Física, Universidad de Extremadura, 06071 Badajoz, Spain;2. Geophysics Centre of Évora, Évora, Portugal;3. Agencia Estatal de Meteorología, Madrid, Spain;1. Instituto Nacional de Técnica Aeroespacial (INTA), Ctra. Ajalvir km. 4, 28850 Torrejn de Ardoz, Spain;2. Izaña Atmospheric Research Center (AEMET), C/La Marina 20, 38071 Sta. Cruz de Tenerife, Spain;3. Institute of Environmental Assessment and Water Research (CSIC), C/Lluis Sole i Sabars s/n, 08028 Barcelona, Spain;1. Climate System Analysis Group, Department of Environmental and Geographical Science, University of Cape Town, South Africa;2. Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Canada;1. National Atmospheric Research Laboratory (NARL), Gadanki, India;2. SRM University, Kattankulathur, India;3. CEBROSS, III Main, Chennai, India;1. Sanjay Ghodawat Group of Institutions, Atigre (Shivaji University, Kolhapur), India;2. Department of Physics, Sanjay Ghodawat University Kolhapur, India;3. Indian Institute of Tropical Meteorology, Pune, India;4. Department of BSH, Fabtech Technical Campus, College of Engineering and Research, Sangola, India;5. Department of Physics, Ahmednagar College, Ahmednagar, India;6. Regional Remote Sensing Centre-Central, National Remote Sensing Centre, Nagpur, India |
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| Abstract: | In recent years, research on ozone variability has mainly focused on the analysis of its trend. Additionally some studies have analyzed the annual, seasonal and day-to-day ozone variations. However, intra-diurnal total ozone variations are notably less explored. Thus, the main objective of this paper is to analyze the diurnal variability of total ozone column (TOC) as recorded by a Brewer spectrophotometer in Madrid (Spain). The results show that about 90% of days present non-negligible diurnal variability, indicating that, in general, it should not be assumed that TOC remains constant throughout a particular day in urban areas. In addition, this variability has a notable seasonal behavior which should be considered (the spring and summer months show higher diurnal TOC variations than autumn and winter months). This pattern is likely caused by the diurnal photochemical processes in the lower troposphere related to the formation of tropospheric ozone near the earth’s surface at populated urban locations. Thus, these diurnal fluctuations in tropospheric ozone could explain part of diurnal TOC variations (between 20% and 70% depending on the mixing layer height). |
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