High-quality data of
total inorganic carbon (TCO2)
and other oceanographic parameters have been acquired repeatedly between 1994 and
2003 along 137ºE (WOCE P9) in the western North Pacific. They indicate the significant
increase in TCO2,
apparent oxygen utilization (AOU) and preformed TCO2
in the water columns between 20ºN and 30ºN, in particular, in the North Pacific
Subtropical Mode Water (NPSTMW). The increase in the preformed TCO2 suggests the 0.9 to 1.1 mol m-2
yr-1 accumulation of the anthropogenic CO2 in this region.
However, the change in the preformed TCO2
associated with the change in the formation region and/or advection of NPSTMW
is also suggested.
Author: M.Ishii, S.Saito, S.Masuda, A.Nakadate, et al (mishii at mri-jma dot go dot jp)
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