Extra-seasonal prediction of summer 500-hPa height field in the area of cold vortices over East Asia with a dynamical-statistical method<xref ref-type="fn" rid="cpb141993fn1">*</xref>

Extra-seasonal prediction of summer 500-hPa height field in the area of cold vortices over East Asia with a dynamical-statistical method*

Zhao Jun-Hu^a)†, Yang Liu^a),^b), Hou Wei^a), Liu Gang^a),^c), Zeng Yu-Xing^a),^c)

Change of returned 11-year average ACC with the number of similar years. (i)–(vi) are the six factors shown in Table 1 .