One of the main goals of the Tropical Rainfall Measuring Mission (TRMM) has been to accurately define the climatological surface rainfall in the tropics. This TRMM Composite Climatology (TCC) consists of a merger of selected TRMM rainfall products over both land and ocean to give a "TRMM-best" climatological estimate. There are 78 data files in this TCC product suite: 13 each (annual and month-of-year) for TRMM data products 2A12, 2A25, 2B31, 3B43, TCC, and standard deviation of TCC.
A beta visualization and analysis tool has been developed to provide the user community with a user friendly interface to do quick analyses and generate visualization of this data collection without downloading any data. Please see the TRMM Composite Climatology Visualization Tool
Figure 1. Indian monsoon rainfall map (averaged during the peak months between June and August) showing the orographically induced precipitation on the west coast of India, at the foothills of the Himalaya mountains, and the west coast of Burma (also known as Myanmar). The map also shows very little precipitation in Sri Lanka and its surrounding area, except the windward southwest. Click on the image to view it full-size.
Figure 2. Similar to Figure 1, except for the time period, which is now the peak rainfall months in Sri Lanka between October and December. As winds shift from southwest to northeast, the orographically induced rains visible in Figure 1 disappear, and heavy rains appear in the windward area in the NE extending SW across Sri Lanka.
Project information page:
Adler, R. F., J.-J. Wang, G. Gu, and George J. Huffman, 2009: A ten-year tropical rainfall climatology based on a composite of TRMM products. J. Meteorol. Soc. Japan, 87A, 281-293. [Abstract
The Tropical Rainfall Measuring Mission (TRMM) is a joint mission between NASA and the Japan Aerospace Exploration Agency (JAXA)
designed to monitor and study tropical rainfall.
Text and images by Dr. Zhong Liu. Reviewed by Steve Kempler, Bill Teng, and Dana Ostrenga, editing and Web formatting by James Acker.
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