2011
DOI: 10.1029/2010jd015076
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Diurnal and seasonal variability of surface ozone and NOxat a tropical coastal site: Association with mesoscale and synoptic meteorological conditions

Abstract: [1] Simultaneous measurements of near-surface ozone, NO x (NO + NO 2 ), and meteorological parameters were carried out at the tropical coastal location of Trivandrum (8.55°N, 77°E) in India from November 2007 to May 2009. The data have been used to investigate the diurnal and seasonal patterns of ozone and its precursor, NO x , and also the interdependence of these two chemical species. The diurnal pattern is found to be closely associated with the mesoscale circulation (sea breeze and land breeze) and the ava… Show more

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Cited by 124 publications
(85 citation statements)
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References 87 publications
(126 reference statements)
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“…Debaje and Kakade (2009) reported the similar time lag from peak air temperature to peak O 3 concentration at continental rural site. Similarly, the maxima of O 3 concentration were always observed in the afternoon in all seasons similar to other coastal rural sites in southern India, a characteristic of rural site (Nair et al 2002;Debaje et al 2003;David and Nair 2011;Nishanth et al 2012). Figure 3a, b shows the annual average diurnal variation of NO 2 for 3 years 2007, 2008 and 2009, and diurnal variation in April and November.…”
Section: Methodsmentioning
confidence: 88%
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“…Debaje and Kakade (2009) reported the similar time lag from peak air temperature to peak O 3 concentration at continental rural site. Similarly, the maxima of O 3 concentration were always observed in the afternoon in all seasons similar to other coastal rural sites in southern India, a characteristic of rural site (Nair et al 2002;Debaje et al 2003;David and Nair 2011;Nishanth et al 2012). Figure 3a, b shows the annual average diurnal variation of NO 2 for 3 years 2007, 2008 and 2009, and diurnal variation in April and November.…”
Section: Methodsmentioning
confidence: 88%
“…The daytime maximum of O 3 concentration reaches greater than 48 ppb during the summer season at Thumba (Trivandrum) and Kannur sites (Nair et al 2002;David and Nair 2011;Nishanth et al 2012). Similarly, the average maximum O 3 concentrations greater than 40 ppb at Tranquebar was reported by Debaje et al (2003).…”
Section: Introductionmentioning
confidence: 82%
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“…For a given location, the O 3 concentration variation was dependent on meteorological variables, such as global radiation, temperature, and wind speed (Dueñas et al, 2002;Cape, 2008;David and Nair, 2011). Because the variations of O 3 concentration and radiation were out-of-phase (Fig.…”
Section: Relations Of O 3 Concentration and Environmental Variablesmentioning
confidence: 99%
“…4). David and Nair (2011) reported that monsoonal air hailing from the marine sources is rich in water vapor content and can cause reduction of O 3 Concentration by involving OH Á radicals. These observations were supported by the air mass back trajectories simulated at the study site, which is discussed in the later part of the text.…”
Section: Meteorological Observationsmentioning
confidence: 99%