Ocean acidification and changes in biological production in the western subarctic region of the North Pacific over the quarter century, 1999–2023
Masahide Wakita·Irene Cionni·Tsuneo Ono·Tetsuichi Fujiki·Kana Nagashima·Fumikazu Taketani·Masahito Shigemitsu·Maki Noguchi-Aita·Akira Nagano·Hiroshi Uchida·Yoshiyuki Nakano·Katsunori Kimoto·Kosei Sasaoka
Abstract Changes in the physical and biogeochemical conditions of the ocean over time can affect marine ecosystems. In this study, we use biogeochemical observational data for the past 25 years (1999–2023) to investigate ocean acidification and changes in biological production at site K2 (47˚ N, 160˚ E) in the western subarctic region of the North Pacific Ocean. During this period, satellite-derived sea surface temperatures increased at a rate of 0.056 °C yr –1 , while the surface mixed-layer sa