Methods
PM10 data collection
This case study is for Lanzhou, the capital of Gansu
Province and an industrial and oil processing city in
northwest China. Lanzhou is surrounded by high mountains;
the frequency of calm winds is as much as 75%,
and 87% in winter. Temperature inversions occur year
round. Such inversions, calm winds, and a continuously
stratified atmosphere are not conducive to horizontal
and turbulent diffusion within basins [37].
Total suspended particulate (TSP) concentration data
from monitoring stations were taken from the Project of
“Science and Technology Cooperation Project of the
Chinese Academy of Science and Gansu Province”.
Seven ambient air quality monitoring stations were distributed
relatively across the Lanzhou urban area, including
the XiGu, ChengGuan, AnNing, and QiLiHe
districts. All stations made measurements in 2000. Because
the Project did not include direct measurements
of PM10 concentrations, a conversion factor between TSP
and PM10 was used. The distribution of the seven stations
and four hospitals is shown in Figure 1. The conversion
MethodsPM10 data collectionThis case study is for Lanzhou, the capital of GansuProvince and an industrial and oil processing city innorthwest China. Lanzhou is surrounded by high mountains;the frequency of calm winds is as much as 75%,and 87% in winter. Temperature inversions occur yearround. Such inversions, calm winds, and a continuouslystratified atmosphere are not conducive to horizontaland turbulent diffusion within basins [37].Total suspended particulate (TSP) concentration datafrom monitoring stations were taken from the Project of“Science and Technology Cooperation Project of theChinese Academy of Science and Gansu Province”.Seven ambient air quality monitoring stations were distributedrelatively across the Lanzhou urban area, includingthe XiGu, ChengGuan, AnNing, and QiLiHedistricts. All stations made measurements in 2000. Becausethe Project did not include direct measurementsof PM10 concentrations, a conversion factor between TSPand PM10 was used. The distribution of the seven stationsand four hospitals is shown in Figure 1. The conversion
การแปล กรุณารอสักครู่..
