Monoterpene nitrate scheme
This page documents the monoterpene nitrate mechanism used in Fisher et al., 2016 (under review in Atmospheric Chemistry and Physics). This is an experimental mechanism that has not yet been included in the standard GEOS-Chem simulation.
Basis of the Implementation
This chemistry is largely based on the scheme developed by Browne et al. (2014) for use in WRF-Chem, which was built on the RACM2 scheme developed by Goliff et al. (2013).
The following table lists the new species included in the mechanism, their name in Browne et al. (2014), and whether they are treated as transported tracers:
|Species||Browne Species||Transported Tracer?||Note|
|API||API||Yes||alpha-pinene & other cyclic terpenes with one double bond|
|APIO2||APIP||No||RO2 from API|
|LIM||LIM||Yes||limonene & other cyclice terpenes with two double bonds|
|LIMO2||LIMP||No||RO2 from LIM|
|PIP||OP2||No||peroxides from API & LIM|
|OLND||TOLND||No||NO3-alkene adduct that primarily decomposes; from monoterpenes only here|
|OLNN||TOLNN||No||NO3-alkene adduct that primarily retains the NO3 funcitonal group; from monoterpenes only here|
|MONITS||TONIT||No||saturated first gen monoterpene organic nitrate|
|MONITU||UTONIT||No||unsaturated first gen monoterpene organic nitrate|
|MONIT||n/a||Yes||first generation monoterpene organic nitrate tracer combines species MONIT=MONITU+MONITS (like ISOPN, MMN)|
|HONIT||HONIT||No||2nd gen monoterpene nitrate|
The following table lists the new reactions included in the monoterpene nitrate scheme:
|API + OH||APIO2||1.21E-11*exp(440/T)|
- Browne, E. C., Wooldridge, P. J., Min, K.-E., and Cohen, R. C.: On the role of monoterpene chemistry in the remote continental boundary layer, Atmospheric Chemistry and Physics, 14, 1225–1238, doi:10.5194/acp-14-1225-2014, http://dx.doi.org/10.5194/acp-14-1225-2014, 2014.
- Fisher, J.A., D.J. Jacob, K.R. Travis, P.S. Kim, E.A. Marais, C. Chan Miller, K. Yu, L. Zhu, R.M. Yantosca, M.P. Sulprizio, J. Mao, P.O. Wennberg, J.D. Crounse, A.P. Teng, T.B. Nguyen, J.M. St Clair, R.C. Cohen, P. Romer, B.A. Nault, P.J. Wooldridge, J.L. Jimenez, P. Campuzano-Jost, D.A. Day, P.B. Shepson, F. Xiong, D.R. Blake, A.H. Goldstein, P.K. Misztal, T.F. Hanisco, G.M. Wolfe, T.B. Ryerson, A. Wisthaler, T. Mikoviny: Organic nitrate chemistry and its implications for nitrogen budgets in an isoprene- and monoterpene-rich atmosphere: constraints from aircraft (SEAC4RS) and ground-based (SOAS) observations in the Southeast US, submitted to Atmospheric Chemistry & Physics, 2016.
- Goliff, W. S., Stockwell, W. R., and Lawson, C. V.: The regional atmospheric chemistry mechanism, version 2, Atmospheric Environment, 68, 174 – 185, http://dx.doi.org/10.1016/j.atmosenv.2012.11.038, 2013.