Changes between Version 7 and Version 8 of doc/app/chememi
- Timestamp:
- Nov 20, 2019 3:22:43 PM (5 years ago)
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doc/app/chememi
v7 v8 8 8 9 9 Emissions of gases and/or passive compounds can be provided by the user in different levels of detail (LOD). Three modes were implemented. 10 Two modes require emission data from file. Gridded emission information can be provided in two LODs via a netCDF file (see also [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/iofiles/pids] ):10 Two modes require emission data from file. Gridded emission information can be provided in two LODs via a netCDF file (see also [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/iofiles/pids] here): 11 11 12 12 • LOD 1 files require gridded annual emission information which are temporally disaggregated by PALM-4U using sector-specific standard time factors … … 16 16 In a third mode traffic emissions are parameterized on the basis of the street type classification provided by OpenStreetMap ([https://www.openstreetmap.org]) and street type specific emissions factors. This option, named ’Parameterized’ mode, is currently only implemented for the traffic sector: 17 17 18 • LOD 0 requires a mean surface emission per day (in micromol/m2/d for gases and in kg/m2/d for particulate matter) for each desired species contained in the applied chemical mechanism together with a weight differing between main and side road emissions defined in the PALM Fortran namelist file (see also [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/par] and [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/chemistry_parameters]). Furthermore, the street type classification provided by OpenStreetMap must be included in the PALM static driver (see also [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/iofiles/pids/static])18 • LOD 0 requires a mean surface emission per day (in micromol/m2/d for gases and in kg/m2/d for particulate matter) for each desired species contained in the applied chemical mechanism together with a weight differing between main and side road emissions defined in the PALM Fortran namelist file (see also [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/par] here and [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/chemistry_parameters] here). Furthermore, the street type classification provided by OpenStreetMap must be included in the PALM static driver (see also [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/iofiles/pids/static] here) 19 19 20 20 To account for the temporal distribution of the parameterized traffic emissions a diurnal profile based on urban traffic counts is implemented to disaggregate the total emission of the different species to hourly values. Currently, the applied temporal profile is the same for all species and main and side roads.