Simultaneous assimilation of satellite NO2, O3, CO, and HNO3 data for the analysis of tropospheric chemical composition and emissions

2014 Fiscal Year Final Research Report

• Project/Area Number: 24740327
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: MIYAZAKI Kazuyuki 独立行政法人海洋研究開発機構, 地球表層物質循環研究分野, 主任研究員 (30435838)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 大気汚染 / データ同化 / 衛星観測 / オゾン / 窒素酸化物

Outline of Final Research Achievements

We have developed an advanced chemical data assimilation system to combine observations of chemical compounds from multiple satellites. NO2, O3, CO, and HNO3 measurements from the OMI, TES, MOPITT, and MLS satellite instruments are assimilated into the global chemical transport model. The data assimilation simultaneously optimizes the chemical species, as well as the emissions of O3 precursors, while taking their chemical feedbacks into account. Comparisons against independent satellite, aircraft, and ozonesonde data show that the data assimilation results in substantial improvements for various chemical compounds. The simultaneous adjustment of the emissions and concentrations is a powerful approach to correcting the tropospheric ozone budget and profile analyses.

Free Research Field

大気科学