(See detailed analysis)

poemDifferent precipitation systems

Precipitation systems over tropics contributes the two-thirds of the global rainfall and are a major source of latent heating for the atmosphere. These systems include single cumulonimbus clouds, warm rain showers, large, long-lives mesoscale convective systems (MCS) etc. Different types of precipitation systems contributes different proportion of the total rainfall over various regions. For example, a large amount of rainfall over Argentina are from some of the largest MCSs, and shallow warm raining systems are the major contributers to the only limited amount of rainfall over some part of oceans,

With a decade of TRMM observations, more than 28 millions of precipitation systems have been found. Their contribution to the total rainfall, seasonal and diurnal cycles are analyzed and listed below:

 

PFs Population fractionRainfall contribution Geo DistributionSeasonal loop Diurnal loopAnnual loop
Size range 75-500 km^2 20.0% 13.5% see picture seasonal diurnal annual
Size range 500-2000 km^2 2.5% 12.8% see picture seasonal diurnal annual
Size range > 2000 km^2 1.0% 68.5% see picture seasonal diurnal annual
Volumetric rainfall > 1000 mm/hr*km^2 4.3% 84.3% see picture seasonal diurnal annual
Volumetric rainfall > 10000 mm/hr*km^2 0.7% 65.8% see picture seasonal diurnal annual
Volumetric rainfall > 50000 mm/hr*km^2 0.2% 46.2% see picture seasonal diurnal annual
No lightning 99.4% 74.8% see picture seasonal diurnal annual
Flashrate 0-10 flash/minute 0.5% 16.8% see picture seasonal diurnal annual
Flashrate > 10 flash/minute 0.1% 8.4% see picture seasonal diurnal annual
Maximum height of 20 dBZ > 0 km 89.9% 99.9% see picture seasonal diurnal annual
Maximum height of 20 dBZ > 5 km 16.7% 85.1% see picture seasonal diurnal annual
Maximum height of 20 dBZ > 10 km 1.1% 43.3% see picture seasonal diurnal annual
Maximum height of 40 dBZ > 0 km 4.5% 80.0% see picture seasonal diurnal annual
Maximum height of 40 dBZ > 5 km 0.8% 37.8% see picture seasonal diurnal annual
Maximum height of 40 dBZ > 10 km 0.0% 1.9% see picture seasonal diurnal annual
Minimum 85 GHz PCT < 250 K 3.4% 75.0% see picture seasonal diurnal annual
Minimum 85 GHz PCT < 200 K 0.7% 45.8% see picture seasonal diurnal annual
Minimum 85 GHz PCT < 150 K 0.1% 17.7% see picture seasonal diurnal annual
Minimum infrared TB < 210 K 2.7% 45.2% see picture seasonal diurnal annual
Minimum infrared TB < 235 K 15.1% 76.4% see picture seasonal diurnal annual
More detailed 10x10 degree global analysis can be accessed here.

TRMM 3B42 Rainfall plots

Following tool allows you to generate a plot of rainfall from 3B42 for a given time and region .

Start Date&time: Z
Variable:
Latitude: From to
Longitude: From to
 
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