辽宁省温带气旋龙卷的环境参数特征

图  3  龙卷相对温带气旋中心分布

(黑色等值线为900 hPa位势高度，单位：dagpm；风羽为900 hPa风场；填色为900 hPa相对涡度；蓝色标记为龙卷；蓝色等值线为龙卷分布的核密度估计，最内圈为90%，最外圈为10%；气旋中心位于(0, 0))

Fig. 3  Spatial distribution of tornado relative to the center of extratropical cyclone

(the black isoline denotes the height at 900 hPa, unit:dagpm;the barb denotes wind at 900 hPa; the shaded denotes relative vorticity at 900 hPa; the blue mark denotes tornado;the blue isoline denotes the kernel density estimation of tornadoes, the innermost(outermost) circle is 90%(10%); the center of extratropical cyclone is located at (0, 0))