Identifying ocean acidification and its controlling mechanisms is an important priority within the broader question of understanding how sustained anthropogenic CO₂ emissions are harming the health of the ocean. Through extensive analysis of observational data products for ocean inorganic carbon, here we quantify the rate at which acidification is proceeding in the western tropical Pacific Warm Pool, revealing −0.0013 ± 0.0001 year⁻¹ for pH and −0.0083 ± 0.0007 year⁻¹ for the saturation index of aragonite for the years 1985–2016. However, the mean rate of total dissolved inorganic carbon increase (+0.81 ± 0.06 μmol · kg⁻¹ · year⁻¹) sustaining acidification was ~20% slower than what would be expected if it were simply controlled by the rate of atmospheric CO₂ increase and transmitted through local air‐sea CO₂ equilibration. Joint Lagrangian and Eulerian model diagnostics indicate that the acidification of the Warm Pool occurs primarily through the anthropogenic CO₂ that invades the ocean in the extra‐tropics is transported to the tropics through the thermocline shallow overturning circulation and then re‐emerges into surface waters within the tropics through the Equatorial Undercurrent from below. An interior residence time of several years to decades, acting in conjunction with the accelerating CO₂ growth in the atmosphere, can be expected to contribute to modulating the rate of Warm Pool acidification.

中文翻译：

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在热带太平洋中从下面进行海洋酸化

在更广泛的问题中，识别海洋酸化及其控制机制是理解人类持续产生的CO ₂排放如何损害海洋健康的一个重要优先事项。通过对海洋无机碳观测数据产物的广泛分析，在此我们量化了西部热带太平洋暖池中酸化的速率，揭示了pH值为-0.0013± 0. 0001年^-1，pH为-0.0083±0.0007年^-1。 1985-2016年文石的饱和指数。但是，平均总溶解无机碳增加率（+0.81±0.06μmol·kg ^-1  ·年^-1）如果仅通过大气CO _2的增加速率来控制并通过本地海气CO ₂平衡传递，则维持酸化的速度要比预期慢20％。拉格朗日和欧拉联合模型诊断表明，暖池的酸化主要是通过人为CO ₂发生的，该CO ₂侵入了温带海洋，并通过温跃层浅倾环流被输送到热带，然后在该区域内重新涌入地表水。热带从下面穿过赤道暗流。内部居住时间为数年至数十年，与加速的CO ₂共同作用 在大气中的生长，可以预期有助于调节温池酸化的速率。