Gravity-Current-Driven Transport of Haze from the North China Plain to Northeast China in Winter 2010-Part 2: Model Simulation with Tagged Tracers

Abstract

In this study, the Nested Air Quality Prediction Model System (NAQPMS) with an online air pollutant tagged module was employed to investigate the contribution of regional transport from the North China Plain (NCP) to Northeast (NE) China during a severe haze episode in the winter of 2010. For simulating particulate matter with a diameter of less than 10 µm (PM 10 ), the NAQPMS model was in good overall agreement with observations in NCP and NE China. Using the tagged module, contribu tions from regional transport and local sources to the ground PM 10 concentration at four representative sites, namely Yingkou, Liaoyang, Tieling, and Jilin, along the haze transport pathway in NE were estimated. The results showed that the regional contribution from the Beijing-Tianjin-Hebei area and Shandong Province accounted for 33−87% of the PM 10 pollution on average at the above four sites, with the contribution decreasing along the pathway from NCP to NE. The impact of regional transport on the peak PM 10 concentrations at the four sites was also investigated. The contribution of the Beijing-Tianjin-Hebei area to PM 10 pollution was 73% at the nearest site Yingkou and 30% at the farthest site Jilin, which is approximately 1500 km from Beijing. Our results demonstrate that Beijing-Tianjin-Hebei may significantly contribute to haze pollution in NE, particularly under favorable meteorological conditions. Thus, efforts to improve the air quality in NE China need to focus on controlling both local and regional emissions, particularly from the downwind NCP.(Citation: Yang. T., X. Wang, Z. Wang, Y. Sun, W. Zhang, Y. Du, and J. Li, 2013: Gravity-current-driven transport of haze from the North China Plain to Northeast China in winter 2010-Part 2: Model simulation with tagged tracers. SOLA, 9, 60−64,

Analysis of Compositional Variation and Source Characteristics of Water-Soluble Ions in PM2.5 during Several Winter-Haze Pollution Episodes in Shenyang, China

“…[6,16,18]. It can also be inferred that because SNA were transmitted mainly by southerly winds, they were probably related to long-distance transport from places such as Beijing, Tianjin, Hebei Province [47][48][49]. The strength of the correlation between Cl − with NH 4 + and K + did not indicate any overall trend, but exhibited good correlations with all three components during Episodes 3, 6, and 9.…”