Environmental Project's Achievements Reports Query System

North Aerosol Supersite Quality Assurance Audit and Data Analysis in 2007 and 2008

Absrtact	The goal of this project is aiming at executing quality assurance audits on the performance of North Aerosol Supersite. The procedures include fixed-term monthly and mobile bi-monthly checks on most instruments. In addition, a half-year check was conducted on particle size distribution instruments. Trouble shooting was required for the maintaining company on instruments not in compliance. Every month, this project held a bi-lateral meeting with the maintaining company to assess instrumental performance for validating the acquired data quality. The data acquisition rates for all instruments were above 87% except for 74.5% for PM¬2.5 nitrate monitor at the end of October in 2008. For collocated comparisons between automated instrument and manual collection, the variations of PM2.5 mass, PM2.5 elemental carbon, PM2.5 organic carbon, and PM2.5 sulfate were consistent. However, irregular high and low values were found for the comparisons. The PM2.5 nitrate from automated instrument was mostly lower than that of manual collection. During yellow-dust event periods in 2008, PM10 mass levels were found a good consistency between manual collections and automated instruments in the nearby Hsin-Chuan, Pan-Chao, and Tsai-Liao air quality stations. For the monitoring of aerosol coarse particles, the dichotomous sampler has long been used; and for the alternative, the subtraction between PM10 and PM2.5 value is also a popular way. Two educational trainings for instrumental measuring principle, instrumental audit, data analysis, and field operation of instruments were held in June and October this year, respectively. Data from selected instruments in the North Aerosol Supersite were found, in general, correlated reasonably well each other. For the analysis of data variation trend, PM2.5 mass level, PM2.5 nitrate, and PM2.5 carbons declined gradually in the calculation of yearly moving average. PM2.5 sulfate, however, had an increasing trend with cyclic variations. The collocated comparisons between automated instruments and manual collections from 2002 to 2008, seven years in total, were listed for easy conversion.
Keyword	Aerosol supersite,aerosol continuous monitoring,aerosol characteristics

Absrtact

The goal of this project is aiming at executing quality assurance audits on the performance of North Aerosol Supersite. The procedures include fixed-term monthly and mobile bi-monthly checks on most instruments. In addition, a half-year check was conducted on particle size distribution instruments. Trouble shooting was required for the maintaining company on instruments not in compliance. Every month, this project held a bi-lateral meeting with the maintaining company to assess instrumental performance for validating the acquired data quality. The data acquisition rates for all instruments were above 87% except for 74.5% for PM¬2.5 nitrate monitor at the end of October in 2008. For collocated comparisons between automated instrument and manual collection, the variations of PM2.5 mass, PM2.5 elemental carbon, PM2.5 organic carbon, and PM2.5 sulfate were consistent. However, irregular high and low values were found for the comparisons. The PM2.5 nitrate from automated instrument was mostly lower than that of manual collection. During yellow-dust event periods in 2008, PM10 mass levels were found a good consistency between manual collections and automated instruments in the nearby Hsin-Chuan, Pan-Chao, and Tsai-Liao air quality stations. For the monitoring of aerosol coarse particles, the dichotomous sampler has long been used; and for the alternative, the subtraction between PM10 and PM2.5 value is also a popular way. Two educational trainings for instrumental measuring principle, instrumental audit, data analysis, and field operation of instruments were held in June and October this year, respectively. Data from selected instruments in the North Aerosol Supersite were found, in general, correlated reasonably well each other. For the analysis of data variation trend, PM2.5 mass level, PM2.5 nitrate, and PM2.5 carbons declined gradually in the calculation of yearly moving average. PM2.5 sulfate, however, had an increasing trend with cyclic variations. The collocated comparisons between automated instruments and manual collections from 2002 to 2008, seven years in total, were listed for easy conversion.

Keyword

Aerosol supersite,aerosol continuous monitoring,aerosol characteristics