Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - An Investigation into the Origins of a Series of PM10 Anomalies at a Remote Location in NW England.
AU - Ferranti, E. J. S.
AU - Whyatt, J. Duncan
AU - Davison, Brian
PY - 2008
Y1 - 2008
N2 - Throughout 2004, PM10 concentrations were measured at 10-minute intervals at Hazelrigg, a remote location in NW England. The annual mean concentration was 6.1 μg m-3 and likely origins were determined using directional and particle size characteristics. The fine temporal resolution of the monitoring also allowed several short periods (< 20 hours) of persistently high PM10 concentration to be identified and then ‘typed’ by the event start time, duration, wind direction and particle size characteristics. A series of night-time PM10 anomalies (concentration < 465 μg m-3) of no obvious source were identified, and by elimination assumed to have originated from a ground-based fire of particle-rich fodder. A novel methodology combining Stokes’ Law with systematic and rigorous modelling of source strength (using ADMS3.2) was developed to locate a possible burn site. The process was limited by the lack of previous modelling studies related to ground-based fires, and also by the capacity of ADMS3.2 to model sub-hourly time-varying emissions and fluctuations in wind speed and direction in the near field. However, modelling did suggest the source was located < 400 m SSE of Hazelrigg, and investigation of this area revealed a burn site where tyres and plastic bags were piled nearby. Few studies have combined directional analysis and modelling to locate a source based on sampled data. This inovative methodology could be used by regulatory bodies to investigate the origins of unidentified PM10 observed within the particle record.
AB - Throughout 2004, PM10 concentrations were measured at 10-minute intervals at Hazelrigg, a remote location in NW England. The annual mean concentration was 6.1 μg m-3 and likely origins were determined using directional and particle size characteristics. The fine temporal resolution of the monitoring also allowed several short periods (< 20 hours) of persistently high PM10 concentration to be identified and then ‘typed’ by the event start time, duration, wind direction and particle size characteristics. A series of night-time PM10 anomalies (concentration < 465 μg m-3) of no obvious source were identified, and by elimination assumed to have originated from a ground-based fire of particle-rich fodder. A novel methodology combining Stokes’ Law with systematic and rigorous modelling of source strength (using ADMS3.2) was developed to locate a possible burn site. The process was limited by the lack of previous modelling studies related to ground-based fires, and also by the capacity of ADMS3.2 to model sub-hourly time-varying emissions and fluctuations in wind speed and direction in the near field. However, modelling did suggest the source was located < 400 m SSE of Hazelrigg, and investigation of this area revealed a burn site where tyres and plastic bags were piled nearby. Few studies have combined directional analysis and modelling to locate a source based on sampled data. This inovative methodology could be used by regulatory bodies to investigate the origins of unidentified PM10 observed within the particle record.
U2 - 10.1039/b807531j
DO - 10.1039/b807531j
M3 - Journal article
VL - 10
SP - 1033
EP - 1040
JO - Journal of Environmental Monitoring
JF - Journal of Environmental Monitoring
SN - 1464-0325
IS - 9
ER -