Fig.2. Scatter plots of SST and CSST anomalies at Ishigakijima(Station i).(a)CSST versus uncorrected SST in the period of 1912 to 1941.(b)As in(a)but for corrected SST.(c)As in(a)but for in the period of 1942 to 1971.Closed circle with vertical and horizontal bars denotes mean deviation of the anomalies with standard deviations.The inclined straight line is the linear regression line.Numerals in brackets of the upper left corner are mean deviations of SST anomalies(left)and CSST anomalies(right).The coeffilcients(a and b)of the linear regression line and correlation coefficient(r)are also denoted in the lower right corner.SST anomalies for theperiod of 1912-1941,respectively.