An improved gridded polycyclic aromatic hydrocarbon emission inventory for the lower reaches of the Yangtze River Delta region from 2001 to 2015 using satellite data

Predicting the Total PAHs Concentrations in Sediments from Selected Congeners Using a Multiple Linear Relationship

“…1a) because of the difference in PAHs emissions in various regions. For another example, although the mean f oc (6.4%) in sediments from the upper reach of Huaihe River 44 was higher than that in sediments from the lower reach of Huaihe River (f oc =4.1%) 45 , C ΣPAHs in sediments from the lower reach of Huaihe River (mean value = 1721.7 µg/kg) 45 were higher than that from the upper reach (mean value = 400.5 µg/kg) 44 , because the emission intensity of PAHs in lower reach of Huaihe River region was higher than that in the upper reach region 39,46 . Moreover, a signi cantly positive correlation between mean concentrations of 13 PAHs (except for Nap, Acy and Ace) in sediment samples derived from globe (N = 1445) and their mean EFs in 15 emission sources was also observed (Fig.…”

“…A most possible reason is that the difference in emitted concentrations of PAHs congeners for various sources is ignored in these predicted relationships. For example, at the equivalent emission concentrations of PAHs (E PAHs ), i.e., 4.39 g/t for iron sintering and 4.51 g/t for gasoline combustion (Table 1), emission concentration of Ace (Table 1) from iron sintering is 0.079 g/t, about 2 orders of magnitude larger than that 0.00046 g/t of gasoline combustion 38,39 . In this study, by classifying 16 PAHs congeners according to the relative similarities of PAHs emission factors from various sources, we observed that there are four characteristic PAHs congeners, i.e., Nap, Acy, Phe and BaA, which can be employed to predicted the total emission of PAHs using the established novel multiple linear relationship.…”

Improved gridded ammonia emission inventory in China

“…NH3 emissions from combusted crop residue were estimated based on crop yield, grain-to-straw ratio, combustion ratio, and combustion efficiency (Zhou et al, 2017). The contribution of firewood combustion to NH3 emissions was derived from (Cong et al, 2017 based on previous studies (Qiu et al, 2016;Li et al, 2018). The emissions originating from human excrement were calculated based on the daily excretion data corresponding to children and adults, rural populations, and the fraction of tatty latrines in each province (Huang et al, 2012).…”

Supplementary material to "Improved gridded ammonia emission inventory in China"

“…f The gridded burned area data were determined by coupling the MCD64A1 and MCD14ML fire products based on previous studies (Li et al, 2018;Qiu et al, 2016).…”