The representation of the stratosphere in reanalyses is crucial for various issues such as atmospheric transport, sudden stratospheric warmings, the polar vortex, and understanding the impact of climate change. The high-top and latest reanalyses are designed with the aim of being able to reproduce the high stratosphere better than the previous generation of low-top reanalyses, thus being better equipped to capture issues such as elevated stratopause events. JRA-3Q is a last generation reanalysis that has been designed as an improvement over its predecessor, JRA-55. In this study, we examine how temperature, geopotential height, and ozone mixing ratio behave in both reanalyses, showing notable differences when comparing various parameters such as correlations and trends. We show that JRA-3Q exhibits substantial differences in its representation of the middle and upper stratosphere compared to JRA-55. Global and tropical latitudes are compared, and negative correlations in stratopause height are observed in the subtropical zone between both reanalyses. Moreover, negative correlations with JRA-3Q and high correlations with JRA-55 have been observed when compared with observational data from MLS, on board of the AURA satellite. Also, we compare our results to SABER data.
Souto et al. (Thu,) studied this question.
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