Abstract
Comment
-
Poster
-
IAMAS
-
JCMP10 - The atmosphere, cryosphere and oceans in Earth System Models
-
Development of KACEv2 and its Stabilization
-
1. Hyomee Lee, National Institute of Meteorological Sciences
2. Jisun Kim, National Institute of Meteorological Sciences
3. Jae-Hee Lee, National Institute of Meteorological Sciences
4. Hyun Min Sung, National Institute of Meteorological Sciences
5. Pil-Hun Chang*, National Institute of Meteorological Sciences
6. Kyung-On Boo, National Institute of Meteorological Sciences
7. Byung-Kwon Moon, Jeonbuk National University
8. Semin Yoon, Jeonbuk National University
9. Sungbo Shim, Korea Meteorological Administration
10. Young-Hwa Byun, Yonsei University
*Presenting Author
-
The National Institute of Meteorological Sciences (NIMS) and the Korea Meteorological Administration (KMA) have participated in Climate Model Intercomparison projects (CMIP6). In CMIP6, they contributed by submitting scenarios using the UK Earth System Model (UKESM) and the KMA Advanced Community Earth-System Model (K-ACE). Currently, K-ACE version2 (KACEv2) is under development in preparation for CMIP7. In this study, we present the development details of KACEv2 and analyze the results of sensitivity tests conducted for model stabilizations. KACEv2 is based on UKESM1 with modifications to enhance Earth system feedback. Notably, the ocean biogeochemical module has been replaced with the Tracers of Ocean Phytoplankton with Allometric Zooplankton (TOPAZ), along with improvements in cloud-aerosol processes. To assess the stability of KACEv2, we conducted four experiments: (1) a control run using KACEv2 with the same configuration as UKESM1 but incorporating the TOPAZ ocean biogeochemical module (CTRL), (2) modifications to the parameterizations of ice nucleation particles (DMT), (3) adopting of heterogeneous hygroscopicity parameters for sulfate aerosols (LO), and a combined experiment incorporating both DMT and LO processes (DMT_LO). The analysis focuses on key climate variables, including global mean temperature, precipitation, cloud amount, chlorophyll concentration, and carbon fluxes. The results revealed the level of spin-up stability and will contribute to a better understanding of the Earth system feedbacks simulated in the KACEv2 model. [This research was funded by the Korea Meteorological Administration Research and Development Program Development and Assessment of Climate Change Scenario under Grant (KMA2018-00321). The main calculations were performed by using the supercomputing resource of the Korea Meteorological Administration (National Center for Meteorological Supercomputer).]