Appendix B. A description of how matrix elements were modified to allow for variation among years in the 11 different types of disturbance matrices.

A description of how matrix elements were modified to allow for variation among years in the 11 different types of disturbance matrices.关于11种不同类型的干扰矩阵（disturbance matrices）中的矩阵元素（matrix elements）如何被修改以实现其随年份产生变化的说明。