Despite the reduction in S and N emissions, acid deposition continues to be a problem for the inland water in Northeast Asia. However, catchment-scale studies on acid deposition in the Asian part of Russia are limited. Based on the long-term data of the Acid Deposition Monitoring Network in East Asia (EANET), we evaluated the effects of acid deposition on the stream water (SW) chemistry in a catchment of the Komarovka River (KMR) located in the Far East of Russia for the period 2005–2019. The SW pH has been decreasing over the last decade, with an increase in acidifying agents, such as SO₄^2– and NO₃^–. The N/S ratio increased in SW due to a rise in NO₃^–, which plays a key role in acidification. In contrast, the rainwater pH has been rising at the nearby EANET site. There were transition periods from a decreasing trend to an increasing trend of S and dissolved inorganic nitrogen (DIN) in 2011 and 2014, respectively. Moreover, because of changing precipitation patterns, the contribution of warm season deposition to acidification has increased, which may accelerate the leaching of S and DIN from the forested catchment. The recent increase in S and DIN deposition and increased warm-season precipitation appeared to cause acidification of SW at KMR. The N leaching at KMR was largely influenced by the precipitation patterns, while DIN deposition and forest conditions should be taken into consideration. An interlinkage between air pollution and climate change should be carefully assessed to understand the forested catchment.

尽管硫和氮排放量有所减少，但酸沉降仍然是东北亚内陆水域的一个问题。然而，对俄罗斯亚洲部分酸沉降的流域规模研究是有限的。基于东亚酸沉降监测网络 (EANET) 的长期数据，我们评估了酸沉降对远东科马罗夫卡河 (KMR) 流域河流水 (SW) 化学的影响2005-2019 年期间的俄罗斯。在过去十年中，随着酸化剂（如 SO ₄ ^2–和 NO ₃ ^– ）的增加，SW pH 值一直在下降。由于 NO _{3的增加，SW 的 N/S 比增加}^–，在酸化中起关键作用。相比之下，附近 EANET 站点的雨水 pH 值一直在上升。2011年和2014年分别存在S和溶解无机氮（DIN）从下降趋势到上升趋势的过渡期。此外，由于降水模式的变化，暖季沉降对酸化的贡献增加，这可能会加速 S 和 DIN 从森林集水区的浸出。最近 S 和 DIN 沉积的增加以及暖季降水的增加似乎导致 KMR 的 SW 酸化。KMR 的 N 浸出很大程度上受降水模式的影响，而 DIN 沉积和森林条件应考虑在内。