The remarkable transition of circulation type from winter to summer in middle stratosphere is from cyclonic type to anticyclone type . this is also the notable characteristic which is different from the transition in low stratosphere and troposphere 因此，在由冬到夏或由夏到冬的某个阶段，该层环流流型出现由气旋向反气旋或由反气旋向气旋型环流转变的过程。
