28 Air Monitoring
These diurnal variations were compared with modelled data from LSCE using the most recent GHG inventory for London (2010) – comparisons are shown below. A direct comparison was difficult to make because inventory data for 2012 will only be published in 2014. However, our comparison indicated that measured CO2
concentrations over the period were mainly higher than predictions based on the inventories available.
Impact of the pilot It is essential that we are able to assess and control GHG emissions at international, national and major city level, to both reduce the level of polluting emissions and to promote the uptake of new low carbon technologies. Rising populations will only enhance this need, as it will increase emissions, so nations will need to implement thorough and robust ways of reporting how they reduce their carbon footprint.
The pilot study in London 2012 showed the viability of the GHG Emissions Measurement Service being developed by Astrium Services and its partners. Further pilots are currently being carried out in Paris and Rotterdam.
What is next?
A long term site is now installed at Divis, IN Northern Ireland sampling the same species at ground level, 50m and 100m. Boundary layer and other meteorological measurements are being made at this site.
By sampling at 100m we can provide measurements of CO2
concentrations that are not overly influenced by local
sources, which is a lesson from the London campaign. When these measurements are combined with modelling, then a comparison with concurrent, UK wide, GHG emissions inventories will be carried out.
The site will also be used to test different calibration protocols, using NPL gas standards, to maximise the accuracy of the measured CO2
concentrations. In addition, sampling will be carried out at 50m and 10m, to gain information on the concentration gradient of CO2
.
The site will be a critical component of the full Emissions Monitoring Service. This will be rolled out for cities and countries aiming to monitor and verify their GHG emissions reductions over a period of time.
For more information on the London Pilot or the Astrium Emissions Measurement Service go to
http://event.astrium.eads. net/en-london-pilot/ or email
Jane.burston@npl.co.uk or
period, so as to cover 95% of the variation. It is not the overall measurement uncertainty.
The variations of carbon dioxide concentrations over the day largely reflect the normal diurnal cycle. The trial was undertaken
over the summer, so photosynthesis from vegetation reduces CO2
concentrations during the daytime. Higher peaks in the
morning and evening are seen at Teddington, Hackney and Poplar compared with Detling, which is most likely down to the effect of local traffic, such as that from the Blackwall Tunnel.
A Range of Products for All Your Air Monitoring Needs
LNI Schmidlin SA (Switzerland) supply gas calibrators, blenders, generators and linearisation systems. They create products for air pollution monitoring, emissions & process (SO2
, NO, NO2 , O3 , HC & BTX),
automotive, laboratory and medical applications, such as ozone generators for low and high concentrations, high precision components for gas flow and pressure regulation, no maintenance Laboratory Hydrogen Generators up to 1000 cc/min @ 10,5 BAR pressure for carrier gas + fuel gas application (99.9999% purity).
Other products include hydrogen and Zero Air 19” rack mounted systems for industrial applications, nitrogen generators for GC and LCMS applications, Zero Air and Ultra Zero Air Generators with and without an on board air compressor up to 90 L/min, and ROC’s (rapid oven coolers) to improve GC sampling thoroughput via faster cooling of the oven.
To ensure the highest quality, LNI Schmidlin SA possesses ISO 9001-2008 certification and ISO 17025 accreditation of its Gas Flow Standard laboratory as well as ISO 13485 – 2003. Their medical gas mixers are also CE certified.
Air Quality Monitoring Solutions for Ultra-Fine Particle Number and Size Distribution Measurements
For More Info, email: email:
For More Info, email: email:
For More Info, email: email:
TSI’s (USA) Environmental Particle Counter (EPC) Model 3783 and Ultra-fine Particle (UFP) Monitor Model 3031 provide unique air quality measurements of ultra-fine particle number (PN) and size distribution. Ultra- fine particles (<100nm) occur in massive numbers in urban air and are not well represented using traditional mass based measurements. Additionally, mounting toxicological evidence appears to indicate that UFP exposure is associated with negative health effects; because of this, instruments like TSI’s EPC Model 3783 and UFP monitor Model 3031 are installed in a variety of air quality monitoring systems across the globe, allowing worldwide UFP concentration comparisons for the first time ever.
For More Info, email: email:
1078ad@reply-direct.com IET March / April 2014
www.envirotech-online.com
For More Info, email: email:
For More Info, email:
28550pr@reply-direct.com
29042pr@reply-direct.com
christele.donadini@
astrium.eads.net
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