セクションアウトライン

    • Chlorophyll concentration (right chart): Chlorophyll concentration increased rapidly in all layers from February to March. This is because of the spring bloom of diatoms. The high concentration of chlorophyll found at the deepest bottom layer is due to the sedimentation of aggregates of diatom grown on the surface.

      Isoprene concentration (left chart): Isoprene concentration increased in the mixed layer from February to March. This is due to the release of isoprene by photosynthesis of phytoplankton in the diatom bloom. Isoprene concentration increased even in the dark bottom layer For the first time, we could observe the production of isoprene in the dark.