摘要
In the original publication of this article,the blue lines(PCC skill of 500-hPa geopotential height over mid-high latit-udes between the observation and ECWMF)in Fig.8a was misplaced.The correct Fig.8 is shown below.The associated description of“other than in P2−P3”should be“other than in P2”in section 3.3.Neither the abstract nor the conclusions are impacted.