Overview
The national map of background NOx concentrations is split into source sectors. When NOx is removed from different sectors, for example to avoid double counting of modelled sources, it is necessary to recalculate the resulting NO2 concentration. This calculator recalculates the NO2 concentration depending on NOx sector removal.
The current version of the tool (v9.0) should only be used with the 2021 Reference Year Background Maps and the current version of the Emissions Factors Toolkit, and can be used for years 2021 to 2040. Guidance on how to use the NO2 Adjustment for NOx Sector Removal Tool is available in the Background Maps User Guide provided below.
Current Version
Documents
NO2 Adjustment for NOx Sector Removal Tool v9.0
Released: November 2024 (XLSB, 3.6MB)
Background Maps User Guide
Released: November 2024 (PDF, 743KB, 46 pages)
Details
This tool incorporates geographical information about regional oxidant concentrations in order to recalculate background NO2 concentrations, alongside information about primary NO2 (f-NO2) from both road and non-road sectors. Grid Square coordinates from the national background maps should be provided, however the tool will estimate the nearest grid square for coordinates provided (so these must be correct), and ensure information on road and non-road sectors is provided.
Previous Version
Documents
NO2 Adjustment for NOx Sector Removal Tool v8.0
Released: August 2020 (XLS, 5.8MB)
Details
For older versions of the tool, please contact the LAQM Helpdesk for further assistance.
