Portable Monitoring Station measurements of trace gases relevant to air quality in Western Sydney, Australia from 23 May 2017 to 18 September 2017

Location: Roof of 2-storey building at 2 Percy St, Auburn NSW 2144,Australia, -33.85469 151.0374 20.6 m rooftop above sea level, height rooftop above street level = 6.72 m; height air intake above rooftop= 3.3 m

Operating dates: 28-October-2016 13:00 to 18-September-2017 13:00
Original measurement time resolution: 1 minute
Averaging time: 1 hour

The portable air quality monitoring site was maintained in accordance with Climate and Atmospheric Science Standard of Operation Procedures which includes scheduled site visit and instruments calibration.

Interruptions or issues:
Replaced the faulty (cooler failure) SO2 instrument T100 S.No 1013 with T100 S.No 276 on 28/06/16 and performed multipoint calibration (MPC). Replaced pump diaphragm of T300 CO and performed MPC. Replaced T204 NOx and Ozone instrument S.No 51 with T204 S.No 71 on 02/08/2017 due to noisy trace of Ozone and performed MPC.

Issues: There was difficulty in determining the orientation of the 3D-sonic due to the surrounding infrastructure and nearby high tension electrical power lines. Final orientation was verified by comparison with wind direction data from the Australian Bureau of Meteorology, Sydney Olympic Park AWS site (station number 066212, GPS 33.8338, 151.0718). The average difference in measured wind direction to Olympic Park AWS was -27 23 (1 s.d., N=1036, Wind speed > 1m/s), and 27 degrees has been added to the recorded wind directions

监测点位位于澳大利亚新南威尔士州奥本市珀西街2号两层建筑屋顶，地理坐标为-33.85469、151.0374，屋顶海拔高度为20.6米，屋顶距路面高度为6.72米，进气口距屋顶高度为3.3米。
运行时段：2016年10月28日13:00至2017年9月18日13:00。
原始测量时间分辨率：1分钟。
平均时长：1小时。
该便携式空气质量监测站点按照《气候与大气科学标准作业程序》进行维护，包含定期站点巡检与仪器校准工作。
设备故障与运维情况：
2016年6月28日，因冷却器故障导致SO₂分析仪T100（序列号1013）失效，更换为序列号276的T100分析仪，并完成多点校准（Multipoint Calibration，MPC）；同步更换T300 CO分析仪的泵膜，并完成多点校准。2017年8月2日，因臭氧信号轨迹出现噪声，将T204 NOₓ与臭氧分析仪（序列号51）更换为序列号71的T204分析仪，并完成多点校准。
存在的问题：
受周边建构筑物与附近高压输电线干扰，难以确定三维超声风速仪（3D-sonic）的朝向。最终通过对比澳大利亚气象局悉尼奥林匹克公园自动气象站（Automatic Weather Station，AWS，站点编号066212，GPS坐标33.8338、151.0718）的风向数据完成朝向验证。该站点与奥林匹克公园AWS的实测风向平均偏差为-27±23°（标准差为1，样本量N=1036，风速>1m/s），因此需将记录的风向值统一上调27度。