5:15 PM - 6:30 PM
[AAS11-P05] Changes in the lower stratospheric residual circulation in JRA-55
Keywords:JRA-55, Brewer-Dobson circulation, lower stratosphere
Recently, Sakazaki et al (2015) found zonally uniform tidal signals in the tropical stratosphere. The vertical wind diurnal amplitudes in the lower stratosphere is not a negligible amount compared with climatological upwelling.
The BDC trend in JRA-55 linked with the representation of the tidal signals change related to the observing system changes in the reanalysis. Comparison of the relation among the JRA-55 family members is discussed in the presentation.