1·After reanalysis, analysts removed all but 14 columns.
经过重新分析，分析员保留了14个字段。
1·Using the NCEP/NCAR reanalysis monthly data of SLP, the seasonal difference of Arctic Oscillation(AO) is studied with the emphasis on the temporal and spatial features of the summer AO.
运用NCEP/NCAR SLP再分析月资料，分析研究了北极涛动的季节性差异，着重讨论了夏季北极涛动的时空特征。