A relationship between Black Smoke Index and Black Carbon concentration

The physical principles of the Black Smoke method for measuring airborne particulate matter are very similar to those of the optical transmission method for Black Carbon, known as aethalometry. A simple quadratic relationship between the two methods can be derived, which could be useful in the interpretation of historical Black Smoke data for human health and climate change studies. Data supporting the relationship from a London kerbside site are presented. Crown Copyright (C) 2007 Published by Elsevier Ltd. All rights reserved.