Improvement of PM2.5 simulations using a global-to-regional hybrid material transport model

2016 Fiscal Year Final Research Report

• Project/Area Number: 26740010
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute for Environmental Studies
• Principal Investigator: Goto Daisuke 国立研究開発法人国立環境研究所, 地域環境研究センター, 主任研究員 (80585068)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: エアロゾル輸送モデル / PM2.5 / 大気汚染 / 東アジア / NICAM / ストレッチ格子法

Outline of Final Research Achievements

A new-type aerosol transport model (NICAM-Chem) in hybrid scales covering from global to regional areas was developed for properly simulating PM2.5 distribution in Asia. The simulated PM2.5 components of both primary particle of black carbon (BC) and secondary particle of sulfate were generally comparable to the observations in monthly mean values. Especially, the high-resolution simulations give a better performance of simulating diurnal variations in aerosol due to meso-scale phenomena. A model intercomparison using NICAM and different dynamic model, MIROC, quantified the differences in simulating sulfate and PM2.5 caused by the difference in simulating cloud fields. A comparison in BC and sulfate between NICAM-Chem and different transport model, WRF-CMAQ, with the observations were conducted. These results clarify the uncertainties of models, which is an important message to properly simulate PM2.5 distribution.

Free Research Field

環境学，環境解析学，環境動態解析