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MerleGering Where is the correct location to measure NO2 to determine whether or not the EU NO2 annual mean limit is being met?

I wish to understand the correct location, for monitoring NO2. Tech Report 11 suggests that kerbside is an appropriate location. In the UK, The Department for Environment (DEFRA), has moved the correct location further away from the road, to the building facade, (see box 1.1 of their LAQM Technical Guidance16 'TG16') - which will of course record much lower readings. Is this the right place to be monitoring, for correct implementation of the Air Quality Monitoring Directive and for assessing whether or not the annual mean NO2 limit is being breached?

the Directive , in Annex VI, instructs national authorities to monitor at points "where highest concentration occur" to which "the population is likely to be directly or indirectly exposed".
In my view, that means you should locate monitors (in this case diffusion tubes) at kerbside (since the directive explicitly excludes measurement in the road. that's where the highest concentrations will occur, and large numbers of people will be exposed at those levels (for example in the UK, there are 1.2 million professional drivers, who will at least get this exposure 8 hours a day, 5 days a week; then there are postmen, street cleaners, builders & engineers working in the roads works, waiters serving in streetside cafes, trash collectors, etc)

 I am a citizen scientist and campaigner in the UK. I am concerned that the true extent of the problem is being concealed by measuring NO2 in locations which artificially reduce the reported levels.

Last discussed by EEA
Aug 26, 2020 03:13 PM

AWolf total CO2 emissions EU27 2018?
data base:[…]/greenhouse-gases-viewer
CO2 EU27 2018:
Total (without LULUCF, with international transport): 3.321 million tonnes
4 - Land Use, Land-Use Change and Forestry: -282 million tonnes
own calculation> Total (with LULUCF, with international transport) resp. total CO2 emissions EU27: 3.039 million tonnes?

Two questions about this:
(1) Is the calculation of the total CO2 emissions for the EU27 in 2018 correct (see above; 3.039 million tonnes)?
(2) Is there a measure of the trustworthiness of this number for the negative LULUCF emissions? E.g. Ranges of uncertainty?

Thank you in advance for the information.

Last discussed by AWolf
Aug 26, 2020 02:29 PM
Last discussed by brianfisher
Aug 24, 2020 04:12 PM