Linear regression model of monthly rainfall based on observed data and model (n = number of months, a₁ = trend, a₀ = intercept (mm), and R² = determination coefficient).

Linear regression model of monthly rainfall based on observed data and model (n = number of months, a1 = trend, a0 = intercept (mm), and R2 = determination coefficient).基于观测数据与对应模型构建的月降雨量线性回归模型（其中n代表月份数，a₁为趋势项，a₀为截距项，单位为毫米(mm)，R²为决定系数）。