16:00 〜 16:15
[ACG39-09] Investigation of Greenhouse Gas Spatial Distribution over the Korean Peninsula using Aircraft Measurement and Validation of the INVERSE-KOREA Model
キーワード：airborne measurement, GHGs, top down approach, spatial distribution
Due to the 2015 Paris Agreement and the subsequent establishment of the new climate regime, Korea has been required to submit a National Inventory Report (NIR) to the UNFCCC every two years since 2024. To improve the accuracy of the NIR, the Korea Meteorological Administration (KMA) launched the INVERSE-KOREA (INverse Modelling for Validating and Evaluating Reduction of the Sectoral Greenhouse Gas Emissions in KOREA) project. This initiative aims to develop a near-real-time operational system for tracking greenhouse gas emissions using top-down approaches.
In this study, we investigated the spatial distribution of greenhouse gases (GHGs) over the Korean Peninsula based on in-situ measurements of CO2 and CH4 concentrations using a Cavity Ring-Down Spectroscopy (CRDS) analyzer onboard the King Air 350 HW research aircraft. Additionally, we evaluated and validated the CO2 and CH4 concentrations simulated by the INVERSE-KOREA model.
Our results showed that CO2 concentrations decreased with increasing altitude at a consistent rate, whereas CH4 concentrations initially decreased but began to increase above 4.5 km. Among data below 1.5 km of flight altitude, which represents surface-level concentrations, high CO2 levels were observed over Yongin (Gyeonggi Province) and Gwangju. In contrast, CH4 concentrations were highest in the southwestern part of Korea, likely due to livestock emissions.
A comparison between INVERSE-KOREA simulations and observed CO2 concentrations in 2019 revealed that the model tended to underestimate CO2 over land while overestimating CO2 over the ocean. This discrepancy suggests that INVERSE-KOREA may have overestimated anthropogenic emissions while underestimating external CO2 inflows.
In this study, we investigated the spatial distribution of greenhouse gases (GHGs) over the Korean Peninsula based on in-situ measurements of CO2 and CH4 concentrations using a Cavity Ring-Down Spectroscopy (CRDS) analyzer onboard the King Air 350 HW research aircraft. Additionally, we evaluated and validated the CO2 and CH4 concentrations simulated by the INVERSE-KOREA model.
Our results showed that CO2 concentrations decreased with increasing altitude at a consistent rate, whereas CH4 concentrations initially decreased but began to increase above 4.5 km. Among data below 1.5 km of flight altitude, which represents surface-level concentrations, high CO2 levels were observed over Yongin (Gyeonggi Province) and Gwangju. In contrast, CH4 concentrations were highest in the southwestern part of Korea, likely due to livestock emissions.
A comparison between INVERSE-KOREA simulations and observed CO2 concentrations in 2019 revealed that the model tended to underestimate CO2 over land while overestimating CO2 over the ocean. This discrepancy suggests that INVERSE-KOREA may have overestimated anthropogenic emissions while underestimating external CO2 inflows.