Peroxy radical concentration in the tropical troposphere over the South East rainforest in April and July 2008. (0P3-Danum-08)
Arunasalam Karunaharan1, Paul Monks1
1 Chemistry, University of Leicester
P15 in Poster presentations
Continuous measurement of peroxy radicals (HO2+RO2),the photolysis rate coefficient J(NO2),J(O1D),metrological measurement and number of other trace gases including NO2,NO3,O3 and VOCS were carried out at the Bukit Atur Global Atmospheric Watch station in the Danum Valley forest conservation area in Sabah Malaysia in April and July 2008.A mean concentration of 25+_3.3 parts per trillion by volume (pptv) was calculated from continuous measurement of the sum of inorganic and organic peroxy radicals using the Chemical amplification technology.Significant night time radical level of peroxy radical were measured up to 40 pptv.A rate of production and destruction analysis showed that radicals were generated during the night time mainly by the reaction of Ozone with Alkenes.There are two different peaks peroxy radical those come from Ozone photolysis which is dominate in mid day and secondary reached its peak about 3 hours later than that of solar radiation by dominate isoprene.
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