Page last updated: December 15, 2011
Files last updated: December 15, 2011
page is for the mechanism implementation and testing files for various
versions of the SAPRC-07 mechanisms. Mechanism definition files are
currently available for the CMAQ and SAPRC modeling systems. Click
here for the page to download all the files and programs to implement
the mechanism using the SAPRC box and chamber modeling software.
Please note: Several errors were found in the SAPRC-07 mechanisms, including one that has small but non negligible effects on ozone and other predictions. The documentation and files implementing the mechanism have been updated. Please replace all documentation reports and files dated prior to January 25, 2010.
|1/25/10||Standard version of the SAPRC-07 mechanism as documented in the CARB report, using chemical operators for peroxy radicals to reduce the number of reactions (CMAQ version is not compatible with the current versions of the CMAQ chemical compiler)|
|1/25/10||The "expanded" version of the above mechanism. Same chemistry, predictions and emissions assignments as SAPRC07B.MEC, and SAPRC07B.RXN, but uses additional reactions for the peroxy radicals so that the .MEC version is compatible with current versions of CMAQ chemical compilers.|
|1/25/10||The version of SAPRC-07 that uses the condensed peroxy radical operator representation as used in SAPRC-99. Discussed in the report documenting the condensed SAPRC-07 mechanisms. (See also the main SAPRC mechanism web page.)|
|1/25/10||"Toxics" version of SAPRC-07, with additional model species to explicitly represent selected toxics species. This is referred to as "SAPRC07T" in the emissions assignment files. This version uses chemical operators for peroxy radicals to reduce the number of reactions (.MEC not compatible with current versions of CMAQ chemical compiler) (Revised 4/8/09)|
|1/25/10||The "expanded" version of the above mechanism. Same chemistry, predictions and emissions assignments as S07TB.MEC, but uses additional reactions for the peroxy radicals so it is compatible with current versions of CMAQ chemical compilers.|
|1/52/10||The standard condensed SAPRC-07 mechanism using the SAPRC-99 peroxy radical representation. This is the most condensed version considered appropriate for airshed model calculations. Discussed in the report documenting the condensed SAPRC-07 mechanisms. (See also the main SAPRC mechanism web page.)|
|1/25/10||The version of the condensed SAPRC-07 mechanism that uses the more detailed SAPRC-07 peroxy radical representation. This may be more appropriate for applications requiring better hydroperoxide predictions. Discussed in the report documenting the condensed SAPRC-07 mechanisms. (See also the main SAPRC mechanism web page.)|
|PHF.ZIP||10/29/08||Set of photolysis (PHF) files with absorption cross-section and quantum yield data for all the photolysis rates in the mechanisms. (Includes all those needed for standard and condensed SAPRC-07, and also the additional photolysis files needed for SAPRC07T.|
||Photolysis rates need for all
versions of SAPRC07 calculated for the set of actinic fluxes used in
the reactivity scale calculations. The actinic fluxes were provided in
1991 by Harvey Jeffries for Summer conditions at 540 meters, and are
included in the spreadsheet. Parameters fitting the photolysis rates as
a function of zenith angle (using the parameterization used in the MCM mechanism) are also included.
|1/25/10||Excel files containing inputs and outputs for test calculations for checking implementation of the standard (S07), condensed (CS07), and "toxics" (S07T) versions of the SAPRC07 mechanisms. The sheet "Input" has the initial concentrations and photolysis rate values for this static, no dilution, no emission calculation. The concentration units are ppm and the time units are minutes. The calculation goes for 720 minutes and results are output each 15 minutes. Each of the active model species has non-zero values during the simulation. For the standard and "toxics" versions of the mechansim, the sheets "Version B" and "Version C" have the results for the species for the two methods for implementing the peroxy radical operators, and show that essentially the same results. For the condensed mechanisms, the sheets "CS07A" and "CS07B" show the results for the two different versions, For all versions, the "Species" sheet summarizes the average concentrations of the species. (Revised 4/8/09)|
||Report documenting the standard
SAPRC07 mechanism, including listings of species reactions in the
mechanism. The PDF and DOC files contains the text of the report
excluding the largest tables in the appendices and the XLS file
contains all the large tables in the appendices.
||Report documenting the condensed SAPRC07 mechanisms, including listings of species and reactions in the mechanisms.
|SAPRC07T.XLS||1/25/10||This Excel file lists the species in the mechanism and
in both the "B" and "C" versions of the SAPRC07T mechanism. It also
has a description of the compounds and indicates the names for the
represented in the emissions, which in some cases are different
than the names used in the mechanism. Presently there is no report
documenting this version of the mechanim, beyond the documentation of
the standard mechanism given above. (Revised 4/8/09)
|MECHLIST.CSV||12/15/11||Listing of the mechanisms for which assignments are made. Includes SAPRC07 (for SAPRC07B.MEC or SAPRC07C.MEC), SAPRC07T (for S07TB.MEC or S07TC.MEC) and CS07 (for CS07A.MEC). Also includes SAPRC99, CBIV, CB05, and RACM2).|
|MSCLIST.CSV||12/15/11||List of model species used for emissions in each of the mechanisms listed in MECHLIST.CSV.|
|SPEC4ASN.CSV||12/15/11||Assignments of all of the Speciate 4.2 chemical categories to the model species listed in MSCLIST.CSV for the mechanisms listed in MECHLIST.CSV.|