The freezing level height (HFL) and the radar bright band height (BBH) are the two important parameters pertaining to cloud
physics and precipitation study. The present paper investigates these two parameters over the Indian Ocean over the
latitudinal range 36S-8N and the longitudinal range 45E-110E. For this purpose, the freezing level height and the radar bright
band height data have been obtained from the data product 2A23 of the precipitation radar (PR) onboard the Tropical
Rainfall Measuring Mission satellite (TRMM). The period of study is 1999-2002; 2007-2008.
Over a location, the HFL and the BBH show monthly and yearly variations. At a particular location over the Indian Ocean,
the HFLmax/min occurs mostly in the same month throughout the period of study. However, at a particular location, the
maximum BBH (BBHmax) does not occur in the same month, so also the minimum BBH (BBHmin). The study shows that the
BBHmin mostly occurs around 35S, while the location of the BBHmax shows strong seasonal dependence.
In individual months, the longitudinally averaged HFL and the BBH show very strong correlations with the latitude, more
significant correlations being with the HFL than with the BBH. The HFL also shows excellent correlations with the latitude
at a fixed longitude. However, at a fixed longitude, the BBH at times, shows, but not always, correlations with the latitude.
The study also shows that over the Indian Ocean, as the latitude increases, the % of times BBH<HFL also increases.