Environmental Project's Achievements Reports Query System

Quality Assurance and Data Validation on Aerosol and Ozone precursor Monitoring from Supersite and Photochemical Assessment Monitoring Stations (PAMs) in 2005 and 2006

Absrtact	(a) PAMs The objectives of the PAMS project are two fold, first to quality assure all the PAM stations and, second, to elucidate the ozone formation mechanism in seasonal high O3 area. After more than 3 years of operation experience the quality assurance plan as well as the standard operation procedure (SOP) have been designed and executed in the PAMS network deployed in central Taiwan and 4 years worth of data has been accumulated and quality controlled for data analysis. Monitoring data of 2005 has been examined for the relationship between meteorology and concentrations. It is found that strong inversion in fall augments the concentration by reducing the degree of mixing. Slower wind speed also facilitates the build-up of primary pollutants. Excellent correlation between ozone levels and ratios of ethylbenzene/xylene was observed for the summer months. Nevertheless, inconsistency between ratios and ozone levels was found for the fall months, suggesting there exists other ozone contributors that needs to be further explored. (b)Supersite This project performs monthly scheduled and bi-monthly random inspections on the maintenance and operation of Taiwan Aerosol Supersite (Supersite). In addition, half of the year instrument calibrations for sulfate, nitrate and aerosol size distribution, collocated instrument intercomparisons between automated and manual methods, data validation, and data classification, etc. are also included in this project. Different monitoring techniques were also intercompared between automated and manual methods this year. For aerosol mass concentration. In general, the results from manual collection were a little bit higher than the automated method. It was probably due to the higher temperature setting than ambient air in automated method to circumvent the interference from air moisture which would evaporate semi-volatile species in the collected aerosol. To provide effective monitoring data persistently, new aerosol monitoring techniques are updated and the future operation planning is also proposed in this year.
Keyword	photochemical reaction,precursor of ozone

Absrtact

(a) PAMs The objectives of the PAMS project are two fold, first to quality assure all the PAM stations and, second, to elucidate the ozone formation mechanism in seasonal high O3 area. After more than 3 years of operation experience the quality assurance plan as well as the standard operation procedure (SOP) have been designed and executed in the PAMS network deployed in central Taiwan and 4 years worth of data has been accumulated and quality controlled for data analysis. Monitoring data of 2005 has been examined for the relationship between meteorology and concentrations. It is found that strong inversion in fall augments the concentration by reducing the degree of mixing. Slower wind speed also facilitates the build-up of primary pollutants. Excellent correlation between ozone levels and ratios of ethylbenzene/xylene was observed for the summer months. Nevertheless, inconsistency between ratios and ozone levels was found for the fall months, suggesting there exists other ozone contributors that needs to be further explored. (b)Supersite This project performs monthly scheduled and bi-monthly random inspections on the maintenance and operation of Taiwan Aerosol Supersite (Supersite). In addition, half of the year instrument calibrations for sulfate, nitrate and aerosol size distribution, collocated instrument intercomparisons between automated and manual methods, data validation, and data classification, etc. are also included in this project. Different monitoring techniques were also intercompared between automated and manual methods this year. For aerosol mass concentration. In general, the results from manual collection were a little bit higher than the automated method. It was probably due to the higher temperature setting than ambient air in automated method to circumvent the interference from air moisture which would evaporate semi-volatile species in the collected aerosol. To provide effective monitoring data persistently, new aerosol monitoring techniques are updated and the future operation planning is also proposed in this year.

Keyword

photochemical reaction,precursor of ozone