%0 Journal Article %1 Bertram:2009p3297 %A Bertram, Timothy H %A Thornton, Joel A %A Riedel, Theran P %A Middlebrook, Ann M %A Bahreini, Roya %A Bates, Timothy S %A Quinn, Patricia K %A Coffman, Derek J %D 2009 %J Geophysical Research Letters %K Aerosol, Aerosols, Ammonium, Aqueous Gaseous Heterogeneous Hydrolysis, Impact Mass-Spectrometer, N2O5, Nitrate Phase, Size, Sulfate, %P L19803 %R 10.1029/2009GL040248 %T Direct observations of N2O5 reactivity on ambient aerosol particles %U http://www.agu.org/pubs/crossref/2009/2009GL040248.shtml %V 36 %X N2O5 reactivity has been measured directly for the first time on ambient aerosol particles using an entrained aerosol flow reactor coupled to a custom-built chemical ionization mass spectrometer at two urban locations during summer. The observed N2O5 reactivity is a strong function of both relative humidity ( RH) and particle chemical composition. We show that particulate organic mass loadings, together with ambient relative humidity, play a leading role in determining the reaction rate of N2O5 with particles. Our observed reactivity values are both more variable and, at times, as much as a factor of ten lower than currently implemented large-scale model parameterizations would predict. Such discrepancies have likely consequences for predictions of NOx availability and ozone production, and the sensitivity of these quantities to aerosol particle loadings. Citation: Bertram, T. H., J. A. Thornton, T. P. Riedel, A. M. Middlebrook, R. Bahreini, T. S. Bates, P. K. Quinn, and D. J. Coffman ( 2009), Direct observations of N2O5 reactivity on ambient aerosol particles, Geophys. Res. Lett., 36, L19803, doi:10.1029/2009GL040248.

@article{Bertram:2009p3297, abstract = {N2O5 reactivity has been measured directly for the first time on ambient aerosol particles using an entrained aerosol flow reactor coupled to a custom-built chemical ionization mass spectrometer at two urban locations during summer. The observed N2O5 reactivity is a strong function of both relative humidity ( RH) and particle chemical composition. We show that particulate organic mass loadings, together with ambient relative humidity, play a leading role in determining the reaction rate of N2O5 with particles. Our observed reactivity values are both more variable and, at times, as much as a factor of ten lower than currently implemented large-scale model parameterizations would predict. Such discrepancies have likely consequences for predictions of NOx availability and ozone production, and the sensitivity of these quantities to aerosol particle loadings. Citation: Bertram, T. H., J. A. Thornton, T. P. Riedel, A. M. Middlebrook, R. Bahreini, T. S. Bates, P. K. Quinn, and D. J. Coffman ( 2009), Direct observations of N2O5 reactivity on ambient aerosol particles, Geophys. Res. Lett., 36, L19803, doi:10.1029/2009GL040248.}, added-at = {2010-06-22T19:38:37.000+0200}, affiliation = {Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA}, author = {Bertram, Timothy H and Thornton, Joel A and Riedel, Theran P and Middlebrook, Ann M and Bahreini, Roya and Bates, Timothy S and Quinn, Patricia K and Coffman, Derek J}, biburl = {https://www.bibsonomy.org/bibtex/285955d6c97a63102b833a3ffd136ca7e/gsmith}, date-added = {2010-04-29 13:03:02 -0400}, date-modified = {2010-04-29 13:03:09 -0400}, doi = {10.1029/2009GL040248}, interhash = {8807a9438d4f78f50b907721d7b95e27}, intrahash = {85955d6c97a63102b833a3ffd136ca7e}, journal = {Geophysical Research Letters}, keywords = {Aerosol, Aerosols, Ammonium, Aqueous Gaseous Heterogeneous Hydrolysis, Impact Mass-Spectrometer, N2O5, Nitrate Phase, Size, Sulfate,}, language = {English}, local-url = {file://localhost/Users/geoffreysmith/Documents/Papers/Geophysical%20Research%20Letters/2009/Geophysical%20Research%20Letters,%2036,%20L19803%202009.pdf}, month = Jan, pages = {L19803}, pmid = {000270696400003}, rating = {0}, timestamp = {2010-06-22T19:39:16.000+0200}, title = {Direct observations of N2O5 reactivity on ambient aerosol particles}, uri = {papers://E88B624E-D406-46FF-9D95-BB9C1AAE3FDC/Paper/p3297}, url = {http://www.agu.org/pubs/crossref/2009/2009GL040248.shtml}, volume = 36, year = 2009 }