We have incorporated minor atmospheric constituents of the troposphere and stratosphere and associated chemical reactions into climate models. We have been developing a chemical climate model, CHASER (MIROC), that can precisely simulate the atmospheric oxidation of BVOCs, the associated SOA generation, and its effects on tropospheric ozone, OH, and methane. Based on this chemical climate model, we also built a data assimilation method (CHASER-DAS). However, these models do not fully incorporate the contribution of plants. This improvement is necessary to understand the climate.

Therefore, we use the chemical climate model CHASER (MIROC) framework. We will implement and improve the representation of gene-plant-climate interaction mechanisms. First, we express the quantity of BVOCs released as a function of the environmental response of plant genes and introduce it into CHASER. Regarding the emission intensity of BVOCs, in addition to methods for estimating VOC emissions from continuous and direct observations of VOCs and satellite observations, we will verify and adjust from multiple angles using various remote sensing observations by satellites, such as that of formaldehyde and aerosol, which are intermediates in BVOC oxidation, as well as data assimilation and inverse estimation of VOC emissions based on this. Furthermore, we will conduct past reproduction and future prediction experiments in compliance with IPCC/CMIP and reproduction experiments targeting flowering time. Specifically, we aim to quantify the environmental responses of plants to long-term and short-term changes in temperature, precipitation, and solar radiation caused by global warming and aerosol changes and, conversely, the effects of changes in plants and BVOCs on the meteorological field.