Temporal changes in water properties of abyssal water in the western North Pacific

The objective of this study is to clarify temporal changes in water properties of abyssal water in the western North Pacific by means of moored CTD/O2 observations. The time series data will be used to evaluate sampling error caused by short-term temperature fluctuation for the estimation of bottom water warming in recent decades derived from land-to-land repeat hydrographic data, and to monitor long-term fluctuation of water properties of the abyssal water.