Promotion of study on the UV-visible optical absorption property of organic aerosols using a ground-based observation network and a climate model

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H04235
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 63010:Environmental dynamic analysis-related
• Research Institution: Chiba University
• Principal Investigator: Irie Hitoshi 千葉大学, 環境リモートセンシング研究センター, 准教授 (40392956)
• Co-Investigator(Kenkyū-buntansha): 須藤 健悟 名古屋大学, 環境学研究科, 教授 (40371744)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 有機エアロゾル / 光吸収特性 / 国際観測網 / 全球化学気候モデル

Outline of Final Research Achievements

At selected international ground-based remote sensing network sites, where aerosol characteristics are expected to be different, multi-year observation data were obtained. Using the data, quantitative estimations of AAOD and AAE were made and their differences were clarified. In addition, organic gas concentrations and their ratios were analyzed together with satellite, aerosol reanalysis (MERRA-2), and global chemical climate model (CHASER) data, which were all validated with the international observation network data. Then, we quantified spatiotemporal variations of UV-visible optical absorption properties of organic aerosols, particularly over the Indochina Peninsula, where they were found to be affected by both biomass burning and anthropogenic sources. Through these significant achievements, we promoted study on the optical absorption property of organic aerosols.

Free Research Field

大気化学、大気環境科学

Academic Significance and Societal Importance of the Research Achievements

地球温暖化・異常気象などが社会に及ぼす影響がより身近に顕在化してきており、大気科学・気候変動研究のさらなる推進が切望されている。このような中、本研究では地球のエネルギー収支の変化の見積もりに最大の不確実性をもたらすエアロゾルについて重要な定量的な観測的知見を得ることができたので、関連の大気科学・気候変動研究を推進し、さらには、広範にわたった学術、科学技術あるいは社会などへの波及効果が期待される。