Quasi-10-day wave and semi-diurnal tide nonlinear interactions during the southern hemispheric SSW 2019 observed in the northern hemispheric mesosphere
<|begin_of_text|><|start_header_id|>system<|end_header_id|> You are a research archivist expert in dataset metadata. Answer the question truthfully.  <|eot_id|><|start_header_id|>user<|end_header_id|> Here is the Description of a dataset. Description:'Sudden stratospheric warming events occur typically over the winter Arctic and are well-known for being accompanied by diverse waves. A rare SSW occurred in the southern hemisphere in September 2019. Here, we combine mesospheric observations from the northern hemisphere to study the wave activities before and during the warming event. A dual-station approach is implemented on high-frequency-resolved spectral peaks to diagnose the horizontal scales of the dominant waves. Diagnosed are multiple tidal components, multiple Rossby normal modes, and two secondary waves arising from nonlinear interactions between a tide and a Rossby wave. Most of these waves do not occur in a climatological sense and occur around the warming onset. Furthermore, the evolution of these waves can be explained using theoretical energy arguments' . Please return only a json list of at most 3 Keywords corresponding to the Description:.<|eot_id|><|start_header_id|>assistant<|end_header_id|> {"Answer" : ["tide, stratospheric sudden warming (SSW), mesosphere, specular meteor radar, wave number"]} <|eot_id|>
 Here is the Description of a dataset. Description:'Sudden stratospheric warming events occur typically over the winter Arctic and are well-known for being accompanied by diverse waves. A rare SSW occurred in the southern hemisphere in September 2019. Here, we combine mesospheric observations from the northern hemisphere to study the wave activities before and during the warming event. A dual-station approach is implemented on high-frequency-resolved spectral peaks to diagnose the horizontal scales of the dominant waves. Diagnosed are multiple tidal components, multiple Rossby normal modes, and two secondary waves arising from nonlinear interactions between a tide and a Rossby wave. Most of these waves do not occur in a climatological sense and occur around the warming onset. Furthermore, the evolution of these waves can be explained using theoretical energy arguments' . Please return only a json list of at most 3 Keywords corresponding to the Description:.
Sudden stratospheric warming events occur typically over the winter Arctic and are well-known for being accompanied by diverse waves. A rare SSW occurred in the southern hemisphere in September 2019. Here, we combine mesospheric observations from the northern hemisphere to study the wave activities before and during the warming event. A dual-station approach is implemented on high-frequency-resolved spectral peaks to diagnose the horizontal scales of the dominant waves. Diagnosed are multiple tidal components, multiple Rossby normal modes, and two secondary waves arising from nonlinear interactions between a tide and a Rossby wave. Most of these waves do not occur in a climatological sense and occur around the warming onset. Furthermore, the evolution of these waves can be explained using theoretical energy arguments
tide, stratospheric sudden warming (SSW), mesosphere, specular meteor radar, wave number