Articles | Volume 22, issue 6
Research article
28 Mar 2022
Research article |  | 28 Mar 2022

An assessment of tropopause characteristics of the ERA5 and ERA-Interim meteorological reanalyses

Lars Hoffmann and Reinhold Spang

Data sets

Reanalysis Tropopause Data Repository Lars Hoffmann and Reinhold Spang

ECMWF Reanalysis v5 (ERA5) ECMWF

ECMWF Reanalysis - Interim (ERA-Interim) ECMWF

COSMIC Data Analysis and Archive Center CDAAC

US High Vertical Resolution Radiosonde Data SPARC

Short summary
We present an intercomparison of 2009–2018 lapse rate tropopause characteristics as derived from ECMWF's ERA5 and ERA-Interim reanalyses. Large-scale features are similar, but ERA5 shows notably larger variability, which we mainly attribute to UTLS temperature fluctuations due to gravity waves being better resolved by ECMWF's IFS forecast model. Following evaluation with radiosondes and GPS data, we conclude ERA5 will be a more suitable asset for tropopause-related studies in future work.
Final-revised paper