polar westerlies meaning in English

极地西风带

For this reason , the aao index ( aaoi ) is defined as the normalized zonal mean slp difference between 30 s and 65 s . the result indicates that when aao is stronger in boreal summer , both the antarctic vortex ( av ) and the polar westerly jet ( pwj ) are stronger while the subtropical westerly jet ( stwj ) is weaker , and vice versa
研究发现，当夏季南极涛动偏强时，南极极涡和高纬度的西风急流强度都偏强，但中低纬度西风急流的强度偏弱;反之，当南极涛动偏弱时，南极极涡和高纬度西风急流强度将偏弱，中低纬度西风急流强度将偏强。