Replication Data for: Predominant mesospheric transient Rossby normal modes prior to stratospheric sudden warming events detected through a phase differencing technique

This study investigates Rossy normal modes with a constraint of both wavenumber and period using two ground-based zonally-separated radars at polar latitude. Detected are predominant 10- and 16-day oscillations before SSW onsets 2009 and 2010, respectively. These oscillations lasted for few tens of days and are associated with a westward traveling zonal wavenumber 1 structure. These results suggest occurrences of predominant Rossy normal modes before the SSW onsets.

本研究借助两台布设于极区纬度的地面纬向分离雷达，在波数与周期双重约束条件下，针对罗斯比正规模（Rossby normal modes）开展研究。研究分别在2009年与2010年的平流层爆发性增温（Stratospheric Sudden Warming, SSW）爆发前，探测到占主导地位的10天尺度与16天尺度振荡。此类振荡持续时长约数十天，且与西传纬向波数1的大气结构密切相关。上述结果表明，平流层爆发性增温爆发前存在占主导地位的罗斯比正规模。