Spatial distribution of radar bright band intensity

A radar bright band is a region of enhanced reflectivity in the echo. During precipitation, falling snowflakes start melting when they encounter warmer layer below freezing. The snowflakes' refractive index and diameter are higher than snow above. Below layer, where over, these become raindrops that fall faster. So, number drops/volume reduces. Since back-scattered power from target directly proportional to 6th its diameter, above it. paper investigates Bright Band Intensity (BBI) derived 2A23 V6 Precipitation Radar (PR) onboard Tropical Rainfall Measuring (TRMM) 35N-35S 180E – 180W 1999-2002, 2007, 2008. study shows band's occurrence more over ocean (mainly Pacific) on continent. Thus, Pacific Ocean plays crucial role weather climate. It substantial seasonal variations. BBI minima, particular, show prominent belts across two hemispheres North-South migration with season direction opposite Inter Convergence Zone (ITCZ) solar movement. longitudinally averaged minima occur latitudes both hemispheres. maxima Northern Hemisphere (NH) at low latitudes, Southern (SH), high latitudes. (rainfall) winter (summer) hemisphere. as also rainfall Over location, daily maximum does not necessarily correspond rainfall. But same hemisphere, so minima.