K2・S1

We have conducted research concerned with the interactions between climate variability and changes in marine ecosystem dynamics and biogeochemical cycles. The focus of the research was an area in the Western North Pacific where the circulation of deep-sea water terminates.
In this area we established two time-series stations, one in the western subarctic gyre (station K2: 47oN, 160oE) and the other in the subtropical gyre (station S1: 30oN, 145oE). In 2010 we began using the R/V Mirai to conduct a time-series comparative study of stations K2 and S1.

Activity in 2016

• （３）Carbon budget at the Western Pacific subarctic station (K2) and subtropical station (S1) based on time-series biological and biogeochemical observation

Activity in 2015

• Long-term trend of chlorophyll in the northwestern Pacific Ocean
• K2S1 project・seasonal variation of primary productivity

Activity in 2014

• Hakuho-maru cruise (May 2014) : Recovery of sediment trap at K2
• Publication 2: Light limitation of Primary Productivity in the western subarctic gyre
• Publication 3: Factors controlling phytoplankton variation and seasonal bloom onset