反环流 meaning in Chinese

counter circulation
counter-circulation

The analysis for the evolution of the upper westerly field , north - south wind field show that the upper jet stream is a good indication to sandstorm - occurring areas , the strong sandstorm appears at the right side of the entry domain of the jet stream and the ascension domain of secondary circulation
对高空东西风场、南北风场的演变进行分析，发现高空急流对沙尘暴发生区有很好的指示作用，强沙尘暴位于200hpa高空急流入口区右侧、 500hpa正涡度中心下风方和次级反环流的上升区域内。