月指数 meaning in Chinese

monthly index

In addition , the ao index released by american climate prediction center ( cpc aoi ) fails to reflect the summer ao mode . in this paper , the time series of the leading principal component of the summertime ( june - september ) surface level pressure anomaly field over the domain poleward of 20 n is defined as the summertime ao index
此外，美国气候预测中心发布的全年北极涛动月指数不能表现夏季北极涛动型，本文将北半球热带外地区( 20 n以北)夏季( 6 - 9月)海平面气压场eof主模态的时间序列定义为夏季北极涛动指数。