[H-CG28] 農業残渣焼却のもたらす大気汚染と健康影響および解決への道筋

[HCG28-03] Modeling analysis of impacts from Kharif crops residue burning on air quality over North India

*山地 一代^1,2、梶野 瑞王^3,2、林田 佐智子^2,4、依田 隆志⁵、佐々木 寛介⁵、齊藤 萌子⁵、亀田 ありす⁵ (1.神戸大学、2.総合地球環境学研究所、3.気象研究所、4.奈良女子大学、5.一般財団法人日本気象協会)

キーワード：大気汚染物質、北部インド、大気化学輸送モデル、排出インベントリ

The remarkable increase in atmospheric pollutant concentrations, such as CO, O₃, and PM_2.5 over the megacities of South Asia has caused major attention from all over the world. Especially, during the dry season, from October to February, the concentration levels of these atmospheric pollutants tend to be enhanced over the megacities in North India. Our chemical transport model simulation using WRF/CMAQ could capture well the seasonal variability of observed PM_2.5 concentrations in Delhi, India, however, the model tended to overestimate PM_2.5 in the rainy season but to clearly underestimate in the dry season. The simulated underestimate in the dry season seemed be caused by uncertainties in satellite-derived biomass burning emission inventories, notably for the small-scale open burning after the Kharif harvest and the other unknown sources. A statistical-derived emission inventory for crop residue burning developed by our Aakash project provides higher emissions than satellite-derived inventory. We will show the simulated atmospheric pollutant concentrations using WRF/CMAQ simulation driven by the new statistical-derived emission inventory, and that will help to understand air pollution over North India