Changes between Version 11 and Version 12 of doc/app/chemdesc

Timestamp:

Nov 20, 2019 3:13:08 PM (5 years ago)

Author:

banzhafs

Comment:

--

doc/app/chemdesc

@@ -19 +19 @@
 Deposition 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)].
 
-A main factor influencing atmospheric chemistry are the emissions of reactive compounds. In PALM-4U emissions can be applied in three different ways:\\
-  * PARAMETERIZED: 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 as described below. No other emissions are considered. street_type can be obtained from `OpenStreetMap`.\\
-  * DEFAULT: Gridded yearly emissions must be supplied by the user as specified in the PIDS document (see sample emissions file). Typical temporal variations are apllied by PALM4U.\\
-  * PRE-PROCESSED: Preprocessed hourly (other temporal intervals will be possible in later versions) 3-d emission fields must be supplied by the user.
+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):\\
+  * 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`.\\
+  * LOD 1: Gridded annual emissions must be supplied by the user as specified in the PIDS document (see [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/iofiles/pids]). A typical diurnal profile based on urban traffic counts is implemented to disaggregate the total emission of the different species to hourly values.\\
+  * 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.
 
-Importantly, for the DEFAULT and the PRE-PROCESSED mode of the emissions, the exact date of the start of the simulation must be indicated through the namelist parameter date_init of the date_and_time_mod module.    
-
-IMPORTANT: In the PRE-PROCESSED mode the initial date of the simulation has to coincide with the first day for which emission values are available.
-
-Find a more detailed description of the PALM-4U emission input in the corresponding attached document [wiki:chempar#no1 here].
+Find a more detailed description of the PALM-4U emission input [https://palm.muk.uni-hannover.de/trac/wiki/doc/app/chememi here].