Characteristics and Development Mechanisms of Northeast Cold Vortices

Figure 7

Distribution of wind fields at 200 hPa (unit: m·s⁻¹). Areas with wind speed greater than 20 m·s⁻¹ during NCV processes (a) in May to September, (b) late spring (May), and (c) early autumn (September), and MCV processes (d) in May to September and (e) summer. The areas of the black box are the typical locations of NCVs in (a)–(c) and MCVs in (d)-(e).