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TeachMeFinance.com - explain Tropical Rainfall Measuring Mission (TRMM) Tropical Rainfall Measuring Mission (TRMM) The term 'Tropical Rainfall Measuring Mission (TRMM)' as it applies to the area of Earth observation can be defined as ' A joint NASA/NASDA mission launched in November 1997. The goal of TRMM is to obtain a minimum of 3 years of climatologically significant observations of rainfall in the tropics. Because rainfall is such a variable phenomenon, adequate sampling is a difficult problem. By averaging the instantaneous rainfall rates for 30 days over a 5 degrees by 5 degrees grid, TRMM will obtain observations that meet climatological requirements. TRMM measurements, used together with cloud models, also will provide accurate estimates of vertical distributions of latent heating in the atmosphere. The present uncertainty about the quantity and distribution of precipitation, especially in the tropics, prohibits definition of the mass and energy exchange between the tropical ocean and atmosphere. Since the tropical atmosphere and oceans are closely coupled, cloud radiation and rainfall are likely to have significant effects on ocean circulation and marine biomass'. About the author
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