Datasets used in the article "Impact of the Initial Stratospheric Polar Vortex State on East Asian Spring Rainfall Prediction in Seasonal Forecast Models"

The seasonal forecast model, National (Beijing) Climate Center (BCC) of China Meteorological Administration (CMA) (http://s2s.cma.cn/centers?mo=babj_CMA_37) has performed large ensemble forecasts from 2001–2021. The ensemble means of the seasonal forecasts in the first three months are publicly available here. The forecasts begin from late February, and the forecasts in the following three months are analyzed in our submitted paper (22 years, 3 months for per year)