Figure 7
(a) 500 hPa atmospheric circulation characteristics and distribution diagram of the volcanic dust curtain and aerosol layer in the mid-high latitudes of the Northern Hemisphere in August 2009; (b) schematic diagram of the atmospheric circulation characteristics of the hPa layer from 40 to 90° N and distribution of the volcanic dust curtain and aerosol layer in December 2009; (° ) atmospheric circulation characteristics of the 500 hPa layer from 30 to 90° N in February 2010; (d) potential height field anomaly distribution of the 500 hPa from 30 to 90° N in February 2010.
