The EAWJS (blue lines, contours are 25 and 30 m/s) and WPSH (red lines, contour values are 5,860 and 5,880 gpm) during 1980-1999 (dashed lines) and 2000-2010 (solid lines), in Expctl (dashed lines in b and c), ExpPsst (solid lines in b), ExpAsst (solid lines in c). d-f represent the differences in the meridional-vertical wind (vectors) and the zonal wind (dashed lines) in the reanalysis data, ExpPsst -Expctl, and ExpAsst-Expctl. Shadings show the significant difference in zonal wind at 90% confidence level. (Zhu et al, 2015)
These studies on the late 1990s’ interdecadal change reveal that the PDO phase transition is important for the interdecadal changes of summer rainfall in East China and the EAWJS is a key in linking them. The findings are significant for understanding the mechanisms of the interdecadal climate change in East China.
References
(1) Zhu, Y. L., H. J. Wang, J. H. Ma, T. Wang, and J. Q. Sun, 2015: Contribution of the phase transition of Pacific decadal oscillation to the late 1990s’ shift in East China summer rainfall, Journal of Geophysical Research, DOI: 10.1002/2015JD023545.
(2) Zhu, Y. L., H. J. Wang, W. Zhou, and J. H. Ma, 2011: Recent changes in the summer precipitation pattern in East China and the background circulation, Climate Dynamics, 36, 1463-1473. DOI: 10.1007/s00382-010-0852-9.
Contact: Dr. ZHU Yali, zhuyl@mail.iap.ac.cn