Ocean acidification metrics (pH and aragonite saturation state) in the western North Pacific in August 2018

Total hydrogen ion scale pH and aragonite saturation state along the 147°E (21-39°N) section in the western North Pacific in August 2018. Seawater aragonite saturation state and total hydrogen ion scale pH values were calculated from the concentrations of dissolved inorganic carbon, total alkalinity, temperature, salinity, phosphate, silicate and pressure data using the CO2SYS.xls program (Version 24). The anthropogenic CO2 value in subsurface water below 100 m was calculated using the TrOCA method (Touratier et al., 2007).2018年8月北太平洋西部147°E（21°N至39°N）断面的总氢离子标度pH值与文石饱和状态。海水文石饱和状态及总氢离子标度pH值，通过溶解无机碳、总碱度、温度、盐度、磷酸盐、硅酸盐与压力数据，利用CO2SYS.xls程序（版本24）计算得到。100米以深次表层海水中的人为二氧化碳（anthropogenic CO₂）含量，采用TrOCA方法（Touratier等，2007）计算得到。