Interactive comment on “Climatology and Interannual Variability of Dynamic Variables in Multiple Reanalyses Evaluated by the SPARC Reanalysis Intercomparison Project (S-RIP)” by

This study provides a comprehensive overview of the temperature and zonal wind biases in eight reanalysis data products, with a focus on stratospheric levels. The study identifies biases in each reanalysis from the “reanalysis mean” (defined as the mean of the MERRA, ERA-Interim, and JRA-55 reanalyses). It then examines reanalysis temperature biases with respect to HIRDLS (an independent satellite measurement) and MSU/AMSU/SSU satellite data products. The authors identify systematic biases and notable change points in the reanalyses associated with discontinuities in data sources, such as the transition from TOVS to ATOVS around 1998-1999. One of the key conclusions of the study is the pervasive uncertainty in zonal winds in the tropical