Difference between revisions of "Monoterpene nitrate scheme"

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|APIO2 ||APIP || No || RO2 from API
 
|APIO2 ||APIP || No || RO2 from API
 
|-
 
|-
|LIM ||LIM || Yes || limonene & other cyclice terpenes with two double bonds
+
|LIM ||LIM || Yes || limonene & other cyclic terpenes with two double bonds
 
|-
 
|-
 
|LIMO2 ||LIMP || No || RO2 from LIM
 
|LIMO2 ||LIMP || No || RO2 from LIM
Line 30: Line 30:
 
|OLND ||TOLND || No || NO3-alkene adduct that primarily decomposes; from monoterpenes only here
 
|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
+
|OLNN ||TOLNN || No || NO3-alkene adduct that primarily retains the NO3 functional group; from monoterpenes only here
 
|-
 
|-
 
|MONITS ||TONIT || No || saturated first gen monoterpene organic nitrate
 
|MONITS ||TONIT || No || saturated first gen monoterpene organic nitrate
Line 55: Line 55:
 
| APIO2 + NO || 0.82HO2 + 0.82NO2 + 0.23HCHO+ 0.43 RCHO + 0.11 ACET + 0.44MEK + 0.07 HCOOH + 0.12MONITS + 0.06MONITU || 4.00E-12
 
| APIO2 + NO || 0.82HO2 + 0.82NO2 + 0.23HCHO+ 0.43 RCHO + 0.11 ACET + 0.44MEK + 0.07 HCOOH + 0.12MONITS + 0.06MONITU || 4.00E-12
 
|-
 
|-
| APIO2 + HO2 || PIP ||1.50E-11
+
| APIO2 + HO2 || PIP || 1.50E-11
 
|-
 
|-
 
| APIO2 + MO2 || HO2 + 0.75HCHO + 0.25 MOH + 0.25 ROH + 0.75RCHO + 0.75MEK || 3.56E-14*exp(708/T)
 
| APIO2 + MO2 || HO2 + 0.75HCHO + 0.25 MOH + 0.25 ROH + 0.75RCHO + 0.75MEK || 3.56E-14*exp(708/T)
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| API + O3 || 0.85OH + 0.1HO2 + 0.62 KO2 + 0.14 CO + 0.02 H2O2 + 0.65RCHO + 0.53MEK || 5.0E-16*exp(-530/T)
 
| API + O3 || 0.85OH + 0.1HO2 + 0.62 KO2 + 0.14 CO + 0.02 H2O2 + 0.65RCHO + 0.53MEK || 5.0E-16*exp(-530/T)
 
|-
 
|-
| API + NO3 || 0.1OLNN + 0.9 OLND || 1.19E-12*exp(490/T)
+
| API + NO3 || 0.1OLNN + 0.9 OLND || 8.33E-13*exp(490/T)
 
|-
 
|-
 +
| LIM + OH || LIMO2 || 4.20E-11*exp(401/T)
 +
|-
 +
| LIMO2 + NO || 0.686HO2 + 0.78NO2 + 0.22MONITU + 0.289 PRPE + 0.231HCHO + 0.491RCHO + 0.058HAC + 0.289MEK || 4.00E-12
 +
|-
 +
| LIMO2 + HO2 || PIP ||1.50E-11
 +
|-
 +
| LIMO2 + MO2 || HO2 + 0.192 PRPE + 1.04 HCHO + 0.308 MACR + 0.25 MOH + 0.25 ROH || 3.56E-14*exp(708/T)
 +
|-
 +
| LIMO2 + MCO3 || 0.5 HO2 + 0.5 MO2 + 0.192PRPE + 0.385 HCHO + 0.308 MACR + 0.5 RCOOH || 7.40E-13*exp(765/T)
 +
|-
 +
| LIMO2 + NO3 || HO2 + NO2 + 0.385PRPE + 0.385HCHO + 0.615MACR || 1.20E-12
 +
|-
 +
| LIM + O3 || 0.85OH + 0.10HO2 + 0.16 ETO2 + 0.42 KO2 + 0.02H2O2 + 0.14CO + 0.46PRPE + 0.04HCHO + 0.79MACR + 0.01HCOOH + 0.07 RCOOH || 2.95E-15*exp(-783/T)
 +
|-
 +
| LIM + NO3 || 0.5OLNN + 0.5OLND || 1.22E-11
 +
|-
 +
| PIP + OH || 0.49OH + 0.44R4O2 + 0.08RCHO + 0.41MEK || 3.4E-12*exp(190/T)
 +
|-
 +
| OLNN + NO || HO2 + NO2 + MONITS || 4.00E-12
 +
|-
 +
| OLND + NO || 2.0 NO2 + 0.287 HCHO + 1.24 RCHO + 0.464 MEK || 4.00E-12
 +
|-
 +
| OLNN + HO2 || 0.7MONITS + 0.3MONITU || 1.66E-13*exp(1300/T)
 +
|-
 +
| OLND + HO2 || 0.7MONITS + 0.3MONITU || 1.66E-13*exp(1300/T)
 +
|-
 +
| OLNN + MO2 || 2.0 HO2 + HCHO + 0.7MONITS + 0.3MONITU || 1.60E-13*exp(708/T)
 +
|-
 +
| OLND + MO2 || 0.5 HO2 + 0.5 NO2 + 0.965 HCHO + 0.93 RCHO + 0.348 MEK + 0.25 MOH + 0.25 ROH + 0.35 MONITS + 0.15 MONITU || 9.68E-14*exp(708/T)
 +
|-
 +
| OLNN + MCO3 || HO2 + MO2 + 0.7 MONITS + 0.3 MONITU || 8.85*E-13exp(765/T)
 +
|-
 +
| OLND + MCO3 || 0.5MO2 + NO2 + 0.287 HCHO + 1.24 RCHO + 0.464 MEK + 0.5 RCOOH || 5.37E-13*exp(765/T)
 +
|-
 +
| OLNN + NO3 || HO2 + NO2 + 0.7 MONITS + 0.3 MONITU || 1.20E-12
 +
|-
 +
| OLND + NO3 || 2.0NO2 + 0.287 HCHO + 1.24 RCHO + 0.464 MEK || 1.20E-12
 +
|-
 +
| OLNN + OLNN || HO2 + 1.4 MONITS + 0.6 MONITU || 7.0E-14*exp(1000/T)
 +
|-
 +
| OLNN + OLND || 0.5 HO2 + 0.5 NO2 + 0.202HCHO + 0.64 RCHO + 0.149 MEK +1.05 MONITS + 0.45 MONITU || 4.25E-14*exp(1000/T)
 +
|-
 +
| OLND + OLND || NO2 + 0.504 HCHO + 1.21 RCHO + 0.285MEK + 0.7 MONITS + 0.3 MONITU || 2.96E-14*exp(1000/T)
 +
|-
 +
| MONITS + OH || HONIT || 4.80E-12
 +
|-
 +
| MONITU + OH || HONIT || 7.29E-11
 +
|-
 +
| MONITU + O3 || HONIT || 1.67E-16
 +
|-
 +
| MONITU + NO3 || HONIT || 3.15E-13*exp(-448/T)
 +
|-
 +
| MONITS + NO3 || HONIT || 3.15E-13*exp(-448/T)
 +
|-
 +
| HONIT + OH || NO3 + HKET || same as HNO3+OH
 +
|-
 +
|}
 +
 +
===Photolysis reactions===
 +
 +
The following table lists the new photolysis reactions included in the monoterpene nitrate scheme:
 +
 +
{| border="1" cellspacing="0" cellpadding="5"
 +
|-bgcolor="#cccccc"
 +
! width="70pt" |'''Species'''
 +
! width="150pt" |'''Products'''
 +
! width="150pt" |'''j-values'''
 +
|-
 +
| PIP || OH + HO2 + RCHO || j(H2O2)
 +
|-
 +
| MONITS || MEK + NO2 || j(ONIT1)
 +
|-
 +
| MONITU || RCHO + NO2 || j(ONIT1)
 +
|-
 +
| HONIT || HKET + NO2 || j(ONIT1)
 
|}
 
|}
  

Latest revision as of 00:48, 11 March 2016

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).

Mechanism

Species

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 cyclic 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 functional 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

Kinetic reactions

The following table lists the new kinetic reactions included in the monoterpene nitrate scheme:

Reactants Products Rate Constant
API + OH APIO2 1.21E-11*exp(440/T)
APIO2 + NO 0.82HO2 + 0.82NO2 + 0.23HCHO+ 0.43 RCHO + 0.11 ACET + 0.44MEK + 0.07 HCOOH + 0.12MONITS + 0.06MONITU 4.00E-12
APIO2 + HO2 PIP 1.50E-11
APIO2 + MO2 HO2 + 0.75HCHO + 0.25 MOH + 0.25 ROH + 0.75RCHO + 0.75MEK 3.56E-14*exp(708/T)
APIO2 + MCO3 0.5 HO2 + 0.5 MO2 + RCHO + MEK + RCOOH 7.40E-13*exp(765/T)
APIO2 + NO3 HO2 + NO2 + RCHO + MEK 1.20E-12
API + O3 0.85OH + 0.1HO2 + 0.62 KO2 + 0.14 CO + 0.02 H2O2 + 0.65RCHO + 0.53MEK 5.0E-16*exp(-530/T)
API + NO3 0.1OLNN + 0.9 OLND 8.33E-13*exp(490/T)
LIM + OH LIMO2 4.20E-11*exp(401/T)
LIMO2 + NO 0.686HO2 + 0.78NO2 + 0.22MONITU + 0.289 PRPE + 0.231HCHO + 0.491RCHO + 0.058HAC + 0.289MEK 4.00E-12
LIMO2 + HO2 PIP 1.50E-11
LIMO2 + MO2 HO2 + 0.192 PRPE + 1.04 HCHO + 0.308 MACR + 0.25 MOH + 0.25 ROH 3.56E-14*exp(708/T)
LIMO2 + MCO3 0.5 HO2 + 0.5 MO2 + 0.192PRPE + 0.385 HCHO + 0.308 MACR + 0.5 RCOOH 7.40E-13*exp(765/T)
LIMO2 + NO3 HO2 + NO2 + 0.385PRPE + 0.385HCHO + 0.615MACR 1.20E-12
LIM + O3 0.85OH + 0.10HO2 + 0.16 ETO2 + 0.42 KO2 + 0.02H2O2 + 0.14CO + 0.46PRPE + 0.04HCHO + 0.79MACR + 0.01HCOOH + 0.07 RCOOH 2.95E-15*exp(-783/T)
LIM + NO3 0.5OLNN + 0.5OLND 1.22E-11
PIP + OH 0.49OH + 0.44R4O2 + 0.08RCHO + 0.41MEK 3.4E-12*exp(190/T)
OLNN + NO HO2 + NO2 + MONITS 4.00E-12
OLND + NO 2.0 NO2 + 0.287 HCHO + 1.24 RCHO + 0.464 MEK 4.00E-12
OLNN + HO2 0.7MONITS + 0.3MONITU 1.66E-13*exp(1300/T)
OLND + HO2 0.7MONITS + 0.3MONITU 1.66E-13*exp(1300/T)
OLNN + MO2 2.0 HO2 + HCHO + 0.7MONITS + 0.3MONITU 1.60E-13*exp(708/T)
OLND + MO2 0.5 HO2 + 0.5 NO2 + 0.965 HCHO + 0.93 RCHO + 0.348 MEK + 0.25 MOH + 0.25 ROH + 0.35 MONITS + 0.15 MONITU 9.68E-14*exp(708/T)
OLNN + MCO3 HO2 + MO2 + 0.7 MONITS + 0.3 MONITU 8.85*E-13exp(765/T)
OLND + MCO3 0.5MO2 + NO2 + 0.287 HCHO + 1.24 RCHO + 0.464 MEK + 0.5 RCOOH 5.37E-13*exp(765/T)
OLNN + NO3 HO2 + NO2 + 0.7 MONITS + 0.3 MONITU 1.20E-12
OLND + NO3 2.0NO2 + 0.287 HCHO + 1.24 RCHO + 0.464 MEK 1.20E-12
OLNN + OLNN HO2 + 1.4 MONITS + 0.6 MONITU 7.0E-14*exp(1000/T)
OLNN + OLND 0.5 HO2 + 0.5 NO2 + 0.202HCHO + 0.64 RCHO + 0.149 MEK +1.05 MONITS + 0.45 MONITU 4.25E-14*exp(1000/T)
OLND + OLND NO2 + 0.504 HCHO + 1.21 RCHO + 0.285MEK + 0.7 MONITS + 0.3 MONITU 2.96E-14*exp(1000/T)
MONITS + OH HONIT 4.80E-12
MONITU + OH HONIT 7.29E-11
MONITU + O3 HONIT 1.67E-16
MONITU + NO3 HONIT 3.15E-13*exp(-448/T)
MONITS + NO3 HONIT 3.15E-13*exp(-448/T)
HONIT + OH NO3 + HKET same as HNO3+OH

Photolysis reactions

The following table lists the new photolysis reactions included in the monoterpene nitrate scheme:

Species Products j-values
PIP OH + HO2 + RCHO j(H2O2)
MONITS MEK + NO2 j(ONIT1)
MONITU RCHO + NO2 j(ONIT1)
HONIT HKET + NO2 j(ONIT1)

References

  1. 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.
  2. 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.
  3. 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.