Assessment of radar reflectivity-rainfall rate, Z-R relationships for a convective event in Malaysia
Abstract— Various relationships between radar reflectivity Z and rainfall rate R commonly identified as Z-R relationships have been derived in order to provide better accuracy for rainfall rate estimation using weather radar. It is critical for the air traffic management at the airport to accur...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
ETPub
2013
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/34370/ http://irep.iium.edu.my/34370/ http://irep.iium.edu.my/34370/ http://irep.iium.edu.my/34370/3/20131006021818775.pdf |
| Summary: | Abstract— Various relationships between radar reflectivity
Z and rainfall rate R commonly identified as Z-R
relationships have been derived in order to provide better
accuracy for rainfall rate estimation using weather radar. It
is critical for the air traffic management at the airport to
accurately detect existence of potential microburst and wind
shear. There are numerous factors that can certainly affect
the accuracy of Z-R relationships including poor hardware
calibration. However, the inaccuracy of Z-R relationships
also might be due to the differences between the
precipitation at the ground level and the precipitation aloft
because radar does not scan all the way down except at close
range. Several Z-R relationships had also been proposed in
the attempt to achieve better accuracy for rainfall estimates
by radar system in the tropical region. Nonetheless, the most
accurate Z-R relationship for Malaysia weather radar is yet
to be investigated and to be identified within the study
period. This paper presents the preliminary analyses of
previously proposed Z-R relationships for Malaysia weather
using new radar data and ground rainfall rate.
Comparisons were made between values obtained from the
previously proposed relationships for radar and the ground
truth measurements. It was identified that the previously
proposed relationships estimations are significantly lower
than the rain gauge data. |
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