- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences
- Laboratory of Aquatic Biology and Environmental Science
- University of Tokyo
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences
- Tokyo
- 113-8657
- Japan
- +813 5841 5290
Research Profile
Research Interests
My research interests include biological and chemical interaction between trace metals such as iron and marine phytoplankton, biogeochemical cycle of silicon and processes regulating primary productivity in the ocean. - Interaction between biological oceanographic processes and trace metals - Effects of iron and other micronutrients on phytoplankton physiology and ecology - Roles of phytoplankton in marine biogeochemical cycles of carbon, nitrogen, phosphorus and silicon.Current projects
Bioavailability and biogeochemical process of trace metals in the surface ocean (W-PASS, SOLAS-Japan): To investigate the speciation and bioavailability of trace metals supplied from the atmosphere to the ocean surface, we are studying the dissolution rate of trace metals from the atmospheric mineral dust and their speciation in seawater.Development of underway sampling system for determination of
dissolved and particulate trace metals in oceanic surface waters
(BIOCARBON, GEOSS): We developed an underway-sampling system as
a means of sample collection for near real-time measurements of
dissolved and particulate trace metals in surface waters. The
underway-sampling system was designed using a Teflon bellows
pump, Teflon tubing, and an epoxy-coated “fish”.
Balance between biogenic silica production and silica
dissolution in the surface ocean: In the subarctic North Pacific
Ocean, rates of production and dissolution of biogenic silica
in the surface water were determined using 29Si or 30Si as a
tracer. Precise determination of the isotopic composition of
dissolved and particulate Si was performed by HR-ICP-MS.