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Research
Atmospheric and hydrospheric sciences
202011202011
Development of Integrated Land Simulator
Tomoko Nitta, Takashi Arakawa, Misako Hatono, Akira Takeshima and Kei Yoshimura
Land model, Earth system modeling, General-purpose coupler, Energy and water cycle, Climate simulation
Concept of Integrated Land Simulator
Accurate simulations of land processes are crucial for many purposes, such as climate simulation, weather, flood, and drought prediction, and climate change impact assessment studies. In this paper, we present a new land simulator called the Integrated Land Simulator (ILS). The ILS consists of multiple models that represent processes related to land (hereafter, referred to as “land models”). They are coupled by a general-purpose coupler, Jcup, and executed using the Multiple Program Multiple Data approach. Currently, ILS includes a physical land surface model, the Minimal Advanced Treatments of Surface Interaction and Runoff model, and a hydrodynamic model, the Catchment-based Macro-scale Floodplain model, and the inclusion of additional land models is planned. We conducted several test simulations to evaluate the computational speed and scalability and the basic physical performance of the ILS. The results will become a benchmark for further development.
