The Earth System Modeling Center (ESMC) of Nanjing University of Information Science & Technology (NUIST) was initiated in the summer of 2012 and formally established in May 2013. The ESMC aims at developing a world-class climate and earth system model to meet the multiple needs for 1) seamless climate prediction from subseasonal to decadal time scale, 2) future projection of the Earth’s climate and environmental changes, and 3) modeling and prediction of highly- impact weather and climate events, and 4) better understanding of underlying physical processes of the complex climate variability. The ESMC serves as an international scientific research platform to promote frontier research on global changes and interdisciplinary research on Earth System Science, as well as to cultivate a team of young generation talents.
The ESMC currently consists of 9 research groups: 1) Model Development, 2) Modeling of Disastrous Events, 3) Ocean and Polar Processes, 4) Climate Prediction and Predictability, 5) Climate Variability and Climate Change, 6) Land Surface and East Asian Monsoon, 7) Aerosol-cloud-radiation Interaction, 8) Atmospheric Chemistry, and 9) Paleoclimate Modeling. Currently about 40 faculty members and postdoctoral fellows are engaging in active research in these areas. In near future a new group, Ocean Biogeochemistry, will be set up.
The first version of the NUIST model, NUIST-CSM V1 was released in October 2014, which is a climate system model that couples the atmosphere, land, ocean, and sea ice components based on Nemo 3.4 ocean model, ECHAM 5.3 atmospheric and land model and CICE 4.1 sea ice model.
The NUIST-CSM V2 version was developed on the basis of CSM V1 and released in December 2015. In V2 version, improved physical parameterizations were incorporated in the atmosphere, land and sea ice components of the coupled model for better climate simulations. Comprehensive and quantitative metrics are set up for evaluation of the model performance against observations and in comparison with the CMIP 5 models. These assessment metrics include more than 85 characteristic variables describing climatology and modes of climate variability in the Earth’s climate system. The NUIST-CSM V2 will be used to conduct retrospective experiments for subseasonal to seasonal prediction and predictability study.
In order to participate in IPCC AR6 experiments, a new version NUIST-ESM V3 is developed recently, in which ECHAM 6.1 and associated JASBACH land model were used to upgrade the atmospheric and land surface models in the V2 version. Modifications were made in cumulus parameterization scheme to improve the precipitation climatology, monsoon and MJO, including a relative humidity-dependent entrainment rate, a refined convective triggering function and convective downdraft scheme, and a new shallow convection scheme based on turbulent kinetic energy. This V3 version is being tested for climate sensitivity and will be used to perform the DECK runs for CMIP6.