講演情報
[AAS08-P30]Evaluation of black carbon and carbon monoxide over East Asia using E3SM model and long-term observations
*ANKAN SARKAR1、Yugo Kanaya1、Takuma Miyakawa1、Chunmao Zhu1、Hitoshi Irie2、Shaocheng Xie3、Qi Tang3、Peter Andrew Bogenschutz3、Seong Soo Yum4 (1.Japan Agency for Marine-Earth Science and Technology、2.Chiba University、3.Lawrence Livermore National Laboratory、4.Korea Institute of Science and Technology)
キーワード：
Aerosols、E3SM、Black Carbon (BC)、Carbon monoxide (CO)、Aerosol optical depth (AOD)、East Asia
In the recent times, East Asia has undergone pronounced changes in atmospheric composition driven by emission controls, economic transitions, and natural variability. This rapid regional emission shifts is also reflected in the long-term measurements of aerosol and trace gases at Fukue Island, a remote receptor site in western Japan which is influenced predominantly by the East Asian outflow in winter-spring. In this context, a trilateral collaborative study is conducted among Lawrence Livermore National Laboratory (USA), Japan Agency for Marine-Earth Science and Technology (Japan), and Korea Institute of Science and Technology (South Korea), aiming to improve modeling framework and advance understanding of the evolving aerosol and trace gas burdens and their climatic implications over East Asia by integrating in-situ observations at Fukue Island and Jeju Island (South Korea) with high-resolution simulations from the Energy Exascale Earth System model (E3SM). Within E3SM, the East Asia Regionally Refined Mesh (EA-RRM) configuration (centered at these two island locations) provides enhanced spatial resolutions over the key outflow areas through a transition from a ~100 km global grid to refined meshes of 12.5 km and 3 km (i.e., a convection-permitting resolution). Overall, the comparison of meteorological parameters between the decadal-scale (2005-2015) E3SM simulations and observations by the Japan Meteorological Agency at Fukue Island indicates generally good agreement, particularly for temperature and relative humidity. Evaluation against the SKYNET aerosol optical depth (AOD) observations (under clear-sky conditions) also suggests that the model performed reasonably well in reproducing AOD at Fukue Island. In addition, long-term measurements of black carbon (BC) and carbon monoxide (CO) at Fukue Island were incorporated to further improve and evaluate the model representation of aerosols and the relevant trace gases. Preliminary results emphasized the need to scale the emissions from CMIP6 in order to achieve improved agreement with the observations. After implementing these emission adjustments, the E3SM model simulations have the potential to obtain a better understanding on how the changing aerosol burden can influence the radiative forcing, clouds and the regional climate over East Asia.