Nitrate leaching as a confounding factor in chemical recovery from acidification in UK upland waters.

摘要: Over the period 1988-2002, data from 18 of 22 lakes and streams in UK Acid Waters Monitoring Network (AWMN) show clear trends declining excess sulphate concentrations response to reductions sulphur deposition, but fewer increasing pH or alkalinity. There has been no significant decline deposition total nitrogen over same period, sites a trend nitrate concentration. Peak have already surpassed on occasion half AWMN sites. Furthermore, current understanding terrestrial N saturation processes suggests that leaching soils may increase, even under constant load. Best-case projections indicate will overtake as major acid anion many within 10 years, while worst-case predictions with steady-state models suggest longer-term, could become dominant most UK.