A02-K107 Quantitative understanding of the supply processes for trace metals in the subtropical North Pacific

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A02-K107

Principal Investigator

TAKANO Shotaro

Kyoto U.

Research Collaborators

HASHIHAMA Fuminori	Tokyo University of Marine Science and Technology, Co-I of A02-4
NAGAI Takeyoshi	Tokyo University of Marine Science and Technology, Co-I of A02-4
IWAMOTO Yoko	Hiroshima U., PI of A02-5

Trace metals in seawater affect primary production and nitrogen fixation in the ocean as essential nutrients or toxins for phytoplankton. This study observes the concentration and stable isotope ratio distributions of trace metals in the western North Pacific and combines these with physical oceanographic observations to estimate fluxes of trace metals to the ocean surface. By comparing these fluxes with biological indicators such as chlorophyll concentrations, the biological response to trace metal supply will be quantitatively elucidated.

Estimate the sources of trace metals supplied to the oceans by analyzing atmospheric aerosols in the western North Pacific.
Determine trace metal concentrations and isotope ratio distributions in the surface ocean of the western North Pacific and estimate fluxes of trace metals supplied to the ocean.
Compare trace metal fluxes with biological indicators such as chlorophyll concentrations and granular carbon concentrations to determine the impact of trace metals on primary production.Identify the processes that shape the probability distribution of temperatures in Japan.