Difference between revisions of "GLOMAP-mode in UKCA linked to Tropospheric Chemistry (StdTrop)"
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In addition to the 26 advected tracers in StdTrop, 7 extra tracers are added for the aerosol chemistry. These consist of 4 sulphur species (DMS, SO2, MSA, H2SO4), ammonia and two organic species. The two organic species are a monoterpene tracer "MONOTER" and an oxidation product "SECORG" following the simple secondary organic aerosol production scheme developed for the GLOMAP-TOMCAT chemistry transport model (e.g. Spracklen et al, 2006). |
In addition to the 26 advected tracers in StdTrop, 7 extra tracers are added for the aerosol chemistry. These consist of 4 sulphur species (DMS, SO2, MSA, H2SO4), ammonia and two organic species. The two organic species are a monoterpene tracer "MONOTER" and an oxidation product "SECORG" following the simple secondary organic aerosol production scheme developed for the GLOMAP-TOMCAT chemistry transport model (e.g. Spracklen et al, 2006). |
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| − | The H2SO4 and SECORG tracers condense into the sulphate and organic carbon components in the GLOMAP-mode aerosol scheme |
+ | The gas phase H2SO4 and SECORG tracers condense into the sulphate and organic carbon components in the GLOMAP-mode aerosol scheme and |
| + | cause particle growth. |
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| − | Aqueous phase oxidation of SO2 by H2O2 and O3 is calculated based on an effective Henry's law approach and produces sulphate |
+ | Aqueous phase oxidation of SO2 by H2O2 and O3 is calculated based on an effective Henry's law approach and produces sulphate in the GLOMAP-mode accumulation and coarse soluble modes, also growing |
| + | existing particles. |
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| + | The gas phase H2SO4 concentration (along with temperature, |
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| ⚫ | |||
| + | humidity and existing particle surface area) determines the |
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| + | nucleation rate in the model which produces secondary aerosol |
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| + | particles. |
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| + | |||
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Spracklen, D. V., Carslaw, K. S., Kulmala, M., et al.: The contribution of boundary layer nucleation events to total particle concentrations on regional and global scales, Atmos. Chem. Phys., 6, 5631--5648, doi:10.5194/acp-6-5631-2006, 2006. |
Spracklen, D. V., Carslaw, K. S., Kulmala, M., et al.: The contribution of boundary layer nucleation events to total particle concentrations on regional and global scales, Atmos. Chem. Phys., 6, 5631--5648, doi:10.5194/acp-6-5631-2006, 2006. |
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Revision as of 18:41, 17 February 2011
This configuration involves an extension to the UKCA Standard Tropospheric Chemistry (StdTrop) scheme to additionally include tropospheric aerosol-precursor chemistry.
In addition to the 26 advected tracers in StdTrop, 7 extra tracers are added for the aerosol chemistry. These consist of 4 sulphur species (DMS, SO2, MSA, H2SO4), ammonia and two organic species. The two organic species are a monoterpene tracer "MONOTER" and an oxidation product "SECORG" following the simple secondary organic aerosol production scheme developed for the GLOMAP-TOMCAT chemistry transport model (e.g. Spracklen et al, 2006).
The gas phase H2SO4 and SECORG tracers condense into the sulphate and organic carbon components in the GLOMAP-mode aerosol scheme and cause particle growth.
Aqueous phase oxidation of SO2 by H2O2 and O3 is calculated based on an effective Henry's law approach and produces sulphate in the GLOMAP-mode accumulation and coarse soluble modes, also growing existing particles.
The gas phase H2SO4 concentration (along with temperature, humidity and existing particle surface area) determines the nucleation rate in the model which produces secondary aerosol particles.
Note that, as for the StdTrop chemistry, this extended scheme (StdTrop+Aero) uses the Backward-Euler solver.
Spracklen, D. V., Carslaw, K. S., Kulmala, M., et al.: The contribution of boundary layer nucleation events to total particle concentrations on regional and global scales, Atmos. Chem. Phys., 6, 5631--5648, doi:10.5194/acp-6-5631-2006, 2006.
