Map of the number of months per year with very often high soil moisture

Soils that show high soil moisture in the respective calendar month over the period from 1991 to 2018 more than in 80% of the years, very often have high soil moisture. High soil moisture is present when the soil water content exceeds 90% of the field capacity (pF 1.8).在1991年至2018年的研究时段内，若某类土壤在对应日历月份的高土壤湿度出现年份占比超过总观测年份的80%，则该类土壤通常会维持高土壤湿度状态。当土壤含水量超过田间持水量（field capacity，pF 1.8）的90%时，即判定为高土壤湿度。