Improved gridded ammonia emission inventory in China

Abstract. As a major alkaline gas in the atmosphere, NH3 significantly impacts atmospheric chemistry, ecological environment, and biodiversity. Gridded emission inventories can affect accuracy of model concentrations play crucial role refinement mitigation strategies. However, several uncertainties are still associated with existing China. Therefore, this study, we focused on improving fertilizer-application-related inventories. We comprehensively evaluated dates times fertilizer application to crops that cultivated China, improved spatial allocation methods for emissions from croplands different rice types, established gridded inventory mainland China resolution 5 min × 2016. The results showed amounted 12.11 Tg, livestock waste (44.8 %) (38.6 being two main sources Obvious variability was also identified, high were predominantly concentrated North Further, tended be summer low winter, ratio July–January period 3.08. Furthermore, maize fertilization primarily responsible increase evaluation temporal study using WRF-Chem ground-station- satellite-based observations it more accurate than other