Predicting the night-time NO3 radical reactivity in the troposphere |
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| Institution: | 1. Shanghai Key Laboratory of Meteorology and Health, Shanghai 200030, China;2. Shanghai Meteorological Service, Shanghai 200030, China;3. Key Laboratory of Aerosol Science and Technology, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an, China;4. CAS Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen 361021, China;5. National Center for Atmospheric Research (NCAR), Boulder 80303, USA;6. Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland |
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| Abstract: | A statistically significant linear correlation between the reaction, kNO3, for the NO3 free radical reaction with 69 organic compounds in the gas phase at 298 K and the corresponding vertical ionization energies, Ei,v, allows an a priori prediction to be made of hitherto not measured compounds. With these reaction rate constants and a mean concentration of NO3 during the night, the upper limit of the tropospheric half-life of organic compounds and their persistence in the troposphere can be estimated. From the fairly good linear correlation between kNO3 and kOH it can be deduced that in the gas phase both free radicals react in a very analogous manner with organic compounds. |
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