Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s

Figure 8

Regression maps of 850 hPa wind and 500 hPa GPH in (a) 1948–1990 and (c) 1991–2016 with regard to the APOI. Shaded area/vectors indicate that the GPH/wind anomalies are significant at the 90% confidence level based on Student’s t-test. (b) and (d) are same are as for (a) and (c), but for the NPSSTI.

(a)

(b)

(c)

(d)