Regional risk assessment of sulfur and nitrogen deposition for terrestrial ecosystems in East and Southeast Asia

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K21686
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Environmental risk control and evaluation; Environmental and ecological symbiosis
• Research Institution: Forestry and Forest Products Research Institute
• Principal Investigator: Yamashita Naoyuki 国立研究開発法人森林総合研究所, 立地環境研究領域, 主任研究員 (30537345)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 広域リスク評価 / 越境大気汚染 / 酸性雨 / 窒素沈着 / 臨界負荷量 / 窒素飽和

Outline of Final Research Achievements

Spatial variations in S and N deposition have changed during past several decades in East and Southeast Asia. To assess the future eutrophication and acidification risks, risk map using critical loads should be updated by considering bedrock, soil type, climate and land-use change in this area where these environmental factors are largely different from Europe and North America. To assess the spatial-temporal change of critical loads exceedance, annual S and N depositions were simulated by CMAQ atmospheric chemical transport model with 80km (1981 - 2005) and 45km (2013) grids. As a result, the range of S and N deposition in 2000s did not exceeded critical loads of acidification except China. Meanwhile N deposition exceeded critical loads of eutrophication in China and a part of southeast Asia. This suggested that eutrophication risk was much higher than acidification risk in the area.

Free Research Field

生物地球化学と広域評価