Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Atmos. Chem. Phys., 14, 12181-12194, 2014
http://www.atmos-chem-phys.net/14/12181/2014/
doi:10.5194/acp-14-12181-2014
© Author(s) 2014. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
19 Nov 2014
Atmospheric amines and ammonia measured with a chemical ionization mass spectrometer (CIMS)
Y. You1, V. P. Kanawade2, J. A. de Gouw3, A. B. Guenther4,5, S. Madronich6, M. R. Sierra-Hernández7, M. Lawler6,8, J. N. Smith6,8, S. Takahama9, G. Ruggeri9, A. Koss3, K. Olson10, K. Baumann11, R. J. Weber12, A. Nenes12,13, H. Guo12, E. S. Edgerton11, L. Porcelli1, W. H. Brune14, A. H. Goldstein10, and S.-H. Lee1 1Kent State University, College of Public Health, Kent, Ohio, USA
2Indian Institute of Technology - Kanpur, Department of Civil Engineering and Center for Environmental Science & Engineering, Kanpur, India
3National Oceanic and Atmospheric Administration, Chemical Science Division, Boulder, Colorado, USA
4Pacific Northwest National Laboratory, Richland, Washington, USA
5Washington State University, Department of Civil and Environmental Engineering, Pullman, Washington, USA
6National Center for Atmospheric Research, Atmospheric Chemistry Division, Boulder, Colorado, USA
7Ohio State University, Byrd Polar Research Center, Columbus, Ohio, USA
8University of Eastern Finland, Applied Physics Department, Kuopio, Finland
9Ecole Polytechnique Federale de Lausanne, Institute d'Ingenierie de l'Environment, Lausanne, Suisse, Switzerland
10University of California – Berkeley, Department of Environmental Science, Policy and Management, Berkeley, California, USA
11Atmospheric Research and Analysis, Inc., Morrisville-Cary, North Carolina, USA
12Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, Georgia, USA
13Georgia Institute of Technology, School of Chemical and Biomolecular Engineering, Atlanta, Georgia, USA
14Penn State University, Department of Meteorology, University Park, Pennsylvania, USA
Abstract. We report measurements of ambient amines and ammonia with a fast response chemical ionization mass spectrometer (CIMS) in a southeastern US forest and a moderately polluted midwestern site during the summer. At the forest site, mostly C3-amines (from pptv to tens of pptv) and ammonia (up to 2 ppbv) were detected, and they both showed temperature dependencies. Aerosol-phase amines measured thermal-desorption chemical ionization mass spectrometer (TDCIMS) showed a higher mass fraction in the evening with cooler temperatures and lower in the afternoon with warmer temperatures, a trend opposite to the gas-phase amines. Concentrations of aerosol-phase primary amines measured with Fourier transform infrared spectroscopy (FTIR) from micron and submicron particles were 2 orders of magnitude higher than the gas-phase amines. These results indicate that gas to particle conversion is one of the major processes that control the ambient amine concentrations at this forest site. Temperature dependencies of C3-amines and ammonia also imply reversible processes of evaporation of these nitrogen-containing compounds from soil surfaces in daytime and deposition to soil surfaces at nighttime. During the transported biomass burning plume events, various amines (C1–C6) appeared at the pptv level, indicating that biomass burning is a substantial source of amines in the southeastern US. At the moderately polluted Kent site, there were higher concentrations of C1- to C6-amines (pptv to tens of pptv) and ammonia (up to 6 ppbv). C1- to C3-amines and ammonia were well correlated with the ambient temperature. C4- to C6-amines showed frequent spikes during the nighttime, suggesting that they were emitted from local sources. These abundant amines and ammonia may in part explain the frequent new particle formation events reported from Kent. Higher amine concentrations measured at the polluted site than at the rural forested site highlight the importance of constraining anthropogenic emission sources of amines.

Citation: You, Y., Kanawade, V. P., de Gouw, J. A., Guenther, A. B., Madronich, S., Sierra-Hernández, M. R., Lawler, M., Smith, J. N., Takahama, S., Ruggeri, G., Koss, A., Olson, K., Baumann, K., Weber, R. J., Nenes, A., Guo, H., Edgerton, E. S., Porcelli, L., Brune, W. H., Goldstein, A. H., and Lee, S.-H.: Atmospheric amines and ammonia measured with a chemical ionization mass spectrometer (CIMS), Atmos. Chem. Phys., 14, 12181-12194, doi:10.5194/acp-14-12181-2014, 2014.
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Short summary
Amiens play important roles in atmospheric secondary aerosol formation and human health, but the fast response measurements of amines are lacking. Here we show measurements in a southeastern US forest and a moderately polluted midwestern site. Our results show that gas to particle conversion is an important process that controls ambient amine concentrations and that biomass burning is an important source of amines.
Amiens play important roles in atmospheric secondary aerosol formation and human health, but the...
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