Assessment of vertical air motion among reanalyses and qualitative comparison with very-high-frequency radar measurements over two tropical stations

Abstract. Vertical wind (w) is one of the most important meteorological parameters for understanding a range different atmospheric phenomena. Very few direct measurements w are available so that time must depend on reanalysis products. In present study, assessment among selected reanalyses (ERA-Interim, ERAi; ERA fifth generation, ERA5; Modern-Era Retrospective analysis Research and Applications, version 2, MERRA-2; National Center Atmospheric Depart- ment Energy reanalysis, NCEP–DOE (R-2); Japanese 55-year JRA-55) qualitative comparison those datasets with VHF radar over convectively active regions Gadanki, India (13.5∘ N, 79.2∘ E), Kototabang, Indonesia (0∘ S, 100.2∘ presented first in troposphere lower stratosphere. The magnitude derived from 10 %–50 % less than observations. Radar show downdrafts below 8 km updrafts above 8–10 both locations. Intercomparison between ensemble respect to individual shows ERAi, MERRA-2 JRA-55 compare well compared ERA5 (R-2). There no significant improvement due effect spatial sampling data around Gadanki station. Directional tendency percentage captured reasonably good, but not by all reanalyses. Thus, caution advised when using