This enhanced Ural blocking–East Asian climate relationship amplifies the
impact of Ural blocking on East Asia and, with the background of decreasing Ural blocking, contributes to the higher
frequency of warm winters in this region. Further analyses suggest that the NAM-related stratospheric polar vortex strength
and its modulation on the propagation of atmospheric stationary waves can account for this change, with the key area
being located in the North Atlantic region. Copyright 2009 Royal Meteorological Society
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