Radiosonde comparison of ERA5 and ERA-Interim reanalysis datasets over tropical oceans

After the release of ERA-Interim reanalysis, many changes have been made to Integrated Forecasting System model and data-assimilation system, resulting in an improved ERA5. One allows version ERA5 represent moisture sensitivity deep convection more realistically than ERA-Interim. A previous modeling study showed that this change alone representation tropical atmosphere, e.g. variability precipitation distribution. Here we compare vertical structures average temperature over oceans ERA5, radiosonde observations see whether is also closer for those regions variables. Our results reveal at levels, relative humidity differ from observations, however generally low-to-midtroposphere. Most notably, stations, on colder ∼550-800 hPa. Large gradients occur profile mean difference between ∼700-900 hPa, but are absent Relative differences not as robust differences, stations moister ∼650-800 hPa while there. Below ∼950 hPa-level observations.Our indicate deviates It seems plausible deviation is, least partly, due newer formulation organised entrainment associated mechanism sensitivity. However, extensive evaluation needed understand reasons reanalyses observations.