New Metrics of the Tropospheric Biennial Oscillation in the East Asian Summer Monsoon and Its Interdecadal Shift
DAI Zhi-Xiu
Figure 1 Leadlag correlation coefficients between the East Asian Summer Monsoon index known as EASMI LZ , which includes area-averaged seasonally dynamical normalized seasonality DNS at 850 hPa within the East Asian monsoon domain 10-40¡ãN, 110-140¡ãE, and the equatorial sea surface temperature SST anomalies 5¡ãS-5¡ãN from September -1 to April 1 for a 1958-2010, b 1958-79, and c 1980-2010. The thick horizontal line represents July 0, which is the reference month of EASMI. Here, the -1, 0, and 1 in parenthesis indicate previous, current, and following years, respectively. The green purple areas represent significantly negative positive correlation areas, exceeding the 95% confidence level. This information was obtained from Fig. 6 of Li et al. 2010 .