Keywords :
Exchange of Gaseous; Atmosphere; Forests
บทคัดย่อ :
The Asian region has been identified as a high-risk area for nitrogen deposition effects on ecosystems. According to a comparison of inferential models used to estimate dry deposition rates for reactive nitrogen across the NitroEurope network (Flechard et al., 2011), there was a large discrepancy in the deposition velocity (Vd) of nitrogen compounds such as HNO3, NH3, NO3- and NH4+ among the models, especially at the forest surface. In recent PM2.5 simulations conducted using chemical transport models for the East Asian region, the modeled results tended to overestimate the PM2.5 nitrate concentration, and the simulated nitrate concentration was highly dependent on Vd of nitrogen compounds (Shimadera et al., 2014). On the other hand, the dry deposition process has rarely been researched for the East Asian region. Therefore a better understanding of the dry deposition process will improve not only the nitrogen deposition assessment but also the model accuracy. In this workshop, I introduce recent field studies on the dry deposition process at forests in East Asia, especially focusing on the researches made in the project "Mechanism of gas and particulate reactive nitrogen deposition for evaluation of nitrogen load to ecosystem (JSPS KAKENHI 16H02933)".
เอกสารอ้างอิง :
Matsuda, K (2019) Exchange of gaseous and particulate reactive nitrogen between the atmosphere and forests . iLEAPS/IGAC-Japan Contract Research Conference 2019, p.9.
