Changes between Version 15 and Version 16 of doc/app/chemdesc


Ignore:
Timestamp:
Sep 16, 2020 6:06:42 AM (4 years ago)
Author:
monakurppa
Comment:

Correct the link to salsa

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  • doc/app/chemdesc

    v15 v16  
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    7 All parts of code that are related to chemistry start with `chem_`.
     7All parts of the code that are related to chemistry start with `chem_`.
    88The main routines and the driver of the chemistry module is included in [[source:palm/trunk/SOURCE/chemistry_model_mod.f90|chemistry_model_mod.f90]], subroutines are in `chem_gasphase_mod.f90`, `chem_photolysis_mod.f90`, and `chem_emissions.f90`.
    99
    1010The chemistry model is automatically activated when a chemistry_parameters namelist is included in the parameter file (<run_identifier>_p3d).
    1111
    12 The module `chem_gasphase_mod.f90`, where the gas phase chemistry rate equations are solved within PALM-4U depends on the chosen chemical mechanism. `chem_gasphase_mod.f90` is generated by a preprocessor that is based on the Kinetic Pre-Processor KPP ([wiki:doc/app/chemref Damian et al. (2002), Sandu et al. (2006))], Release 2.2.3 from November 2012 (http://people.cs.vt.edu/asandu/Software/Kpp/, kpp-2.2.3.tar.gz) and an adapted version of the KPP postprocessor KP4 ([wiki:doc/app/chemref Jöckel et al (2010)]). This adapted Version of KP4 which converts the KPP-generated code to a PALM-4U module is named kpp4palm.
     12The module `chem_gasphase_mod.f90`, where the gas-phase chemistry rate equations are solved within PALM-4U depends on the chosen chemical mechanism. `chem_gasphase_mod.f90` is generated by a preprocessor that is based on the Kinetic Pre-Processor KPP ([wiki:doc/app/chemref Damian et al. (2002), Sandu et al. (2006))], Release 2.2.3 from November 2012 (http://people.cs.vt.edu/asandu/Software/Kpp/, kpp-2.2.3.tar.gz) and an adapted version of the KPP postprocessor KP4 ([wiki:doc/app/chemref Jöckel et al (2010)]). This adapted version of KP4 which converts the KPP-generated code to a PALM-4U module is named kpp4palm.
    1313
    1414The chemical preprocessor is located in the subdirectory `UTIL/chemistry/gasphase_preproc`.
    1515
    16 Currently, areosol compounds can be considered either as passive compounds or the sectional aerosol module [wiki:salsa SALSA]   ([wiki:doc/app/chemref Kokkola et al. (2008)]) can be used to simulate the aerosol particle concentrations, and size distributions.
     16Currently, aerosol compounds can be considered either as passive compounds or the sectional aerosol module [wiki:doc/tec/aerosol SALSA]   ([wiki:doc/app/chemref Kokkola et al. (2008)]) can be used to simulate the aerosol particle concentrations and size distributions.
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    1919Deposition processes are also taken into account in the chemistry model. The deposition of particles is derived following [wiki:doc/app/chemref Zhang et al. (2001)] while gases are deposited using the DEPAC model following [wiki:doc/app/chemref van Zanten et al. (2010)].
    2020
    21 A main factor influencing atmospheric chemistry are the emissions of reactive compounds. In PALM-4U emissions can be provided by the user in different levels of detail (LOD):\\
    22   * LOD 0: Traffic emissions are parameterized depending on the the values of street_type in the static file. Emission values for each street type and chemical compound must be supplied in the namelist. This option, named ’Parameterized’ mode, is currently only implemented for the traffic sector. No other emissions are considered. street_type can be obtained from `OpenStreetMap`.\\
     21The main factor influencing atmospheric chemistry is the emissions of reactive compounds. In PALM-4U emissions can be provided by the user in different levels of detail (LOD):\\
     22  * LOD 0: Traffic emissions are parameterized depending on the values of street_type in the static file. Emission values for each street type and chemical compound must be supplied in the namelist. This option, named ’Parameterized’ mode, is currently only implemented for the traffic sector. No other emissions are considered. street_type can be obtained from `OpenStreetMap`.\\
    2323  * LOD 1: Gridded annual emissions must be supplied by the user as specified in the [[attachment:wiki:doc/app/iofiles/pids:PALM_input_data_standard.pdf|PIDS document]]. A typical diurnal profile based on urban traffic counts is implemented to disaggregate the total emission of the different species to hourly values.\\
    24   * LOD 2: Gridded preprocessed hourly (other temporal intervals will be possible in later versions) emission information that is already temporally disaggregated must be supplied by the user. IMPORTANT: In this mode the initial date of the simulation has to coincide with the first day for which emission values are available.
     24  * LOD 2: Gridded preprocessed hourly (other temporal intervals will be possible in later versions) emission information that is already temporally disaggregated must be supplied by the user. IMPORTANT: In this mode, the initial date of the simulation has to coincide with the first day for which emission values are available.
    2525
    2626Find a more detailed description of the PALM-4U emission input [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/chememi here].