Study on the Evolution of a Northeast China Cold Vortex during the Spring of 2010
FU Shen-Ming1, SUN Jian-Hua2, QI Lin-Lin3
Figure 2 Streamline field and vorticity shaded, units: 10 -5 s -1 at 500 hPa: a 1800 UTC 17 May; b 0000 UTC 18 May; c 0600 UTC 18 May; d 1200 UTC 18 May; e 1800 UTC 18 May; f 0000 UTC 19 May; g 0600 UTC 19 May; h 1200 UTC 19 May; i 1800 UTC 19 May; and j 0000 UTC 20 May 2010.