日本地球惑星科学連合2018年大会

講演情報

[EJ] ポスター発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS06] 大気化学

2018年5月23日(水) 13:45 〜 15:15 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:岩本 洋子(広島大学 生物圏科学研究科)、中山 智喜(長崎大学 大学院水産・環境科学総合研究科)、豊田 栄(東京工業大学物質理工学院、共同)、江口 菜穂(Kyushu University)

[AAS06-P13] MAX-DOAS retrieval of aerosol extinction properties in Beijing, China

*Cheng Liu1,3Chengzhi Xing1Shanshan Wang2Haoran Liu1Wei Tan1,3Jianguo Liu3 (1.USTC、2.Fudan Univ.、3.AIOFM)

キーワード:MAX-DOAS, aerosol, pollution process

Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements were performed in the campus of Chinese Academy of Meteorological Sciences (CAMS) in Beijing, China. The O4 absorption in the visible (VIS) and ultraviolet (UV) spectral regions were used to retrieve the aerosol extinction profiles and aerosol optical depths (AODs) using the Heidelberg Profile (HeiPro) algorithm in haze days and non-haze days, respectively. The results show that the correlation between retrieved AODs and the correlative Aerosol Robotic Network (AERONET) AODs in VIS region (R = 0.86) is better than that in UV region (R = 0.62) in haze days. However, the correlations described above are similar in VIS region (R = 0.96) and UV region (R = 0.97) in non-haze days. There is a considerable overestimation on AODs in UV region than in VIS region under hazy conditions, which could be attributed to the light diffusion and the uncertainties in aerosol physical and chemical input parameters in the Radiative Transfer Model (SCIATRAN) simulations. The retrieved aerosol extinction profiles using the exponential decreasing a priori show a great agreement with that measured by light detection and ranging (lidar), especially under clear-sky conditions. Moreover, we found that the retrieved sensitvity (averaging kernel) at different altitudes in UV region is smaller that in VIS region, which propably results in the overestimation on the aerosol extinction at low altitudes in UV region under hazy conditions.