Figure 7

Simulation using meteorological observation data of JMA (a) Simulated QYs from late November to February in the 1950 and 2020 seasons. The blue dashed line and red line indicate simulated values for the 1950 and 2020 seasons, respectively. (b) Simulation of seasonal minimum QYs in Tsukuba from 1950 to 2020. Open plots indicate seasonal minimum QYs predicted by the established model. The red line, blue lines, and blue dashed lines indicate linear regression lines, 95% confidence intervals, and 95% prediction intervals, respectively. (c–e) Simulations of the seasonal minimum in 1950, 2021, 2090 were shown in (c–e), respectively. The red and blue plots show the predicted QY seasonal minimums below 0.20 and above 0.20, respectively. Red lines indicated decision boundaries calculated by the SVM model. The based map was drawn with ‘map’ package of R software under GPL2 licenses.