Road salt (NaCl) and acid deposition co-occur across much of North America and Europe. One such region is the Adirondack Park (AP) in New York, USA, where the effects of acid deposition have been widely studied and the effects of road salt have not. Road salt delivers 3560 Mmol_c of Na to AP roads each year, which has significant potential to displace soil base cations and exacerbate ecosystem recovery from acidification. Our objective was to estimate the effect of road salt on soil base cation export for the AP. We used a simple steady state model based on estimated runoff and cation concentrations from lakes in watersheds with (n=84) and without (n=68) paved roads to estimate watershed export of Ca, Mg, K, and Na. Road salting resulted in significantly higher export for all cations, with 28, 15, 2, and 83 mmol_c/m²/year more of Ca, Mg, K, and Na released, respectively, compared to watersheds without paved roads. Mineral weathering rates are insufficient to replace these lost cations and thus watershed recovery from acidification will be slower in the presence of road salt. Road salt should be included as a co-occurring stressor when assessing the impacts of pollutants on ecosystem health, not only in the AP but wherever road salt is applied.

北美和欧洲大部分地区同时发生路盐（NaCl）和酸沉积。这样的地区之一就是美国纽约的阿迪朗达克公园（AP），该地区对酸沉积的影响已得到广泛研究，而路盐的影响尚未得到研究。路盐提供3560毫摩尔_Ç娜每年AP的道路，它具有以取代土基阳离子和酸化加剧生态系统的恢复显著的潜力。我们的目标是评估路用盐对AP的土壤基础阳离子出口的影响。我们根据（n = 84）和不使用（n= 68）铺了道路，以估算钙，镁，钾和钠的分水岭出口。道路盐化导致所有阳离子的出口量显着增加，与没有铺路的流域相比，每年分别释放出28、15、2和83 mmol _c / m ² /年的Ca，Mg，K和Na。矿物的风化速率不足以替代这些丢失的阳离子，因此，在存在路盐的情况下，从酸化中分水岭的恢复将变慢。在评估污染物对生态系统健康的影响时，不仅在亚太地区而且在使用路盐的任何地方，都应将路盐作为共同出现的压力源。