Figure 3
(a−f) Mean monthly variations within the blank-rectangle region (see Fig. 1) of (a) phosphate (JMA, 1970−2015); (b) chlorophyll-a (JMA, 1970−2015); (c) U-component of current (NCEP, 2009−2014); (d) total mass flux (this study, 2009−2014); (e) δ15N (this study, 2009−2014); and (f) aerosol optical thickness (MODIS, 2009−2014). All available JMA data during the given period were used to better construct the seasonal variations in phosphate and chlorophyll-a. Nonetheless, there were still no data for March, September, and December.
