Figure 2 (IMAGE)

Science China Press

Figure 2

Caption

Climatological mean of vertical vorticity (d) and its decomposition: (a) vertical vorticity of horizontal circulation, (b) vertical vorticity of meridional and zonal circulations, (c) vertical vorticity of horizontal, meridional and zonal circulations at 850 hPa (1979-2013) for DJF. e~h, i~l and m~p same as a~d, but for 500 hPa, 200 hPa and the vertical mean surface, respectively.

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