Evaluation of TRMM 3B42V7 product on extreme precipitation measurements over peninsular Malaysia
2017
Climate variability has become a matter worth our attention as this issue has unveiled to the extreme water-related
disasters such as flood and drought. Increments in heavy precipitation have happened over the past century and future
climate scenarios show that it may alter the recurrence, timing, force, and length of these occasions. Satellite
precipitation products (SPPs) could be used as representation of precipitation over a large region. This could be useful
for the monitoring of the precipitation pattern as well as extreme events. Nevertheless, application of these products in
monitoring extreme precipitation is still limited because insufficiency of quality assessment. This study aims to evaluate
the performance of the Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA)
3B42V7 product in capturing the behavior of extreme precipitation events over Peninsular Malaysia from 2000 to 2015.
Four extreme precipitation indices, in two general categories of absolute threshold (R10mm, R20mm and R50mm) and
maximum (Rx1d) indices that recommended by the Expert Team on Climate Change Detection and Indices (ETCCDI)
were used. General evaluation has shown that the TRMM 3B42V7 product performed good on the measurements of
monthly and annual precipitation. In the respect of extreme precipitation measurements, weak to moderate positive
correlations were found between the TRMM 3B42 product and rain gauges over Peninsular Malaysia. The TRMM
3B42V7 product overestimated the R10mm and R20mm indices, while an underestimation was found for the R50mm
and Rx1d indices.
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