The accelerated rate of climate change in the Arctic Ocean occurs in conjunction with a system known for its extreme seasonal variability. Here, we present 2 years of continuous pH, salinity, and temperature data from the north Arctic coast of Alaska from instruments deployed in a kelp bed at 4.5–6 m depths in Stefansson Sound. At the innermost site, which receives freshwater runoff from the nearby Sagavanirktok River, short-term pH variability in late spring and summer produced pH values up to 8.67. The pH values of the deeper offshore site were less affected by freshwater input, although biological (heterotrophy) and physiochemical (ice formation) processes dominated during the winter months, driving pH down to 7.47 during the 8-month period of ice cover. These long-term physicochemical measurements reveal the natural but critical influence of changing river inputs on the pH of Arctic nearshore waters which support highly productive communities and subsistence fisheries.

中文翻译：

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高频 pH 时间序列揭示了北极沿海水域的明显季节性

北冰洋气候变化的加速发生与一个以其极端季节性变化而闻名的系统有关。在这里，我们展示了来自阿拉斯加北部北极海岸的 2 年连续 pH、盐度和温度数据，这些数据来自部署在斯蒂芬森海峡 4.5-6 m 深度的海藻床上的仪器。在最内层，从附近的 Sagavanirktok 河接收淡水径流，春末和夏季的短期 pH 变化产生高达 8.67 的 pH 值。尽管生物（异养）和物理化学（冰形成）过程在冬季占主导地位，但较深的近海站点的 pH 值受淡水输入的影响较小，在 8 个月的冰盖期间将 pH 值降至 7.47。