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12 Oct 2021CERC present at AQE Show and UKHSA Annual Review Meeting

This is a very busy time for CERC, presenting our research results to a wide range of audiences at key events this week.

The Air Quality and Emissions Virtual Event 2021 is being held on the 13th and 14th October. Speakers from government, academia and industry are presenting on a range of topics including national air quality monitoring and indoor air quality. Amy Stidworthy is presenting results from the application of CERC's Bayesian-based inversion methodology, which has been used to quantify the impact of COVID-19 restrictions on emissions in London by combining modelling and measurements. Read the abstract to Amy's talk and register for the free event.

The 2021 UK Health Security Agency (UKHSA) Annual UK Review Meeting on Outdoor and Indoor Air Pollution Research is being held online on the 14th October. This key national meeting of the UK’s experts in the field of air pollution and health research is aimed at academics, policy makers, directors of public health and health charities; topics covered include air pollutant exposure and the impact of using green cleaning products on indoor air quality. Dr Jenny Stocker is giving an overview of the development of MAQS-Health, CERC's world-leading coupled air quality modelling system that spans national to urban street scales and accounts for physical and chemical processes at all relevant temporal and spatial scales. MAQS-Health is being developed to facilitate the generation of outdoor air pollutant concentration datasets suitable for health research as part of the SPF Clean Air Programme. Read the abstract to Jenny's talk and sign up for the meeting by Tuesday 12th October.

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11 Oct 2021CERC sponsor & present at Routes to Clean Air 2021

CERC are once again proud to sponsor the Institute of Air Quality Management's annual Routes to Clean Air 2021 conference to be held at Mercure Holland House, Bristol, on the 12th of October 2021.

The Routes to Clean Air conferences provide an opportunity for air quality, public health and transport professionals to share their experiences of improving air quality, particularly in urban areas. This year features an excellent selection of talks from top experts in air quality and related fields, including CERC's Dr Christina Hood presenting a talk entitled 'Modelling complex urban environments: Hong Kong'. Other topics to be discussed include urban Clean Air Zones, agriculture emissions, indoor air quality and materials emissions.

Speaker details, information on how to register and the conference programme can be found on the IAQM website here, and talks from previous years are also available.

CERC will also be exhibiting at the conference, so come and find us to discuss the range of software and consultancy services we provide, or just say hello.

27 Sep 2021Summer 2021 editions of ADMS Model Newsletters now available

Catch up on ADMS model news in the Summer 2021 editions of ADMS 5 & ADMS-Screen News and ADMS-Urban & ADMS-Roads News which are now available. The newsletters include the latest news about the ADMS models, the annual User Group Meetings, CERC activities, training courses and recently published papers as well as a page of useful modelling tips. Previous editions of the newsletters are available here.

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17 Sep 2021New review of odour emissions modelling with model intercomparison

Dispersion modelling plays an important role in the assessment of potential odour annoyance for planned activities and the investigation of complaints related to existing facilities. However, compared to general air pollution modelling there are particular challenges associated with modelling odour dispersion and exposure due to the importance of odour variations over short timescales to the perceived nuisance.

CERC's consultancy team, with Estonian, Latvian and Lithuanian Environment (ELLE) has carried out a Review of Approaches to Dispersion Modelling of Odour Emissions and Intercomparison of Models and Odour Nuisance Assessment Criteria. This review covers the technical approaches used for a variety of dispersion modelling methodologies applied to the assessment of odour nuisance, and summarises a wide range of odour assessment methods and criteria from different countries.

CERC's ADMS was used alongside AERMOD and AUSTAL2000 in a model intercomparison with four measurement datasets including: field odour inspections; field and wind tunnel tracer experiments; and continuous odour monitoring. Different odour criteria were compared, with a particular focus on the 98th percentile of hourly average concentrations and approaches involving concentration fluctuations and odour hours. Further discussion considers the effects of dose-response, suitable values of peak-to-mean concentration ratios, statistical methods and fluctuation models for predicting short-term odour impacts.

The work was funded by the UK Atmospheric Dispersion Modelling Liaison Committee (ADMLC) and the report is freely available here. CERC have previously led or contributed to ADMLC studies of near-field dispersion, non-point source dispersion, dispersion model sensitivity to source term parameters and urban dispersion. The reports for these studies and those by other authors on topics including dense gas dispersion and the ingress of external contaminants into buildings remain freely available.

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19 Aug 2021CERC evaluates City of London Corporation's progress on Air Quality Strategy

The City of London has been designated as an Air Quality Management Area (AQMA) so the Corporation is required to submit an Annual Air Quality Status Report outlining progress towards their Air Quality Strategy aims. One aim is that nitrogen dioxide should meet health-based Limit Values and WHO Guidelines in over 90% of the Square Mile by 2025. In order to evaluate progress, CERC consultants carried out an assessment of nitrogen dioxide concentrations in the City in 2019. This was done by means of a combination of high-resolution modelling using ADMS-Urban, with input data taken from the London Atmospheric Emissions Inventory and local traffic counts, and measurements from the City's network of continuous and diffusion-tube monitors. The resulting 1-metre resolution map of annual average NO2 concentrations CERC generated can be seen in the image (above). The area of the City meeting the NO2 limit value of 40 µg/m3, excluding the footprint of buildings, was calculated to be 67%, an increase from 30% in 2018. This assessment is being used by the City to help inform the public and policy-makers on progress towards the target of 90% compliance.


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