The maximum likelihood method used in current GEV
fitting may not be the best approach, as a number
of studies show that the probability weighted moment
(L-moment) technique may produce better results for a
short data record (Hosking 1990; Hosking and Wallis
1997; Katz et al. 2002; Gilleland and Katz 2006). In addition,
regional statistics, rather than single grid statistics,
will be incorporated to alleviate sporadic behavior
in the short data record (Burn 1990; Hosking and Wallis
1997; Endreny and Imbeah 2009). The characteristics
and uncertainty of satellite estimates of extreme precipitation,
and the way these uncertainties propagate
into ARI, will be further investigated.
With the launch of the Global Precipitation Measurement
(GPM) mission (Hou et al. 2014), a new Integrated
Multisatellite Retrievals for GPM (IMERG)
will become available at an even higher resolution and
accuracy (0.18 and 1 h; Huffman et al. 2014). The new
GPM IMERG data will replace 3B42RT in the future
with their increased capability for monitoring extreme
precipitation events. As the TRMM–GPM data record
length grows, these ARI products will be more robust
and become increasingly important for research and
hazard management.
The maximum likelihood method used in current GEVfitting may not be the best approach, as a numberof studies show that the probability weighted moment(L-moment) technique may produce better results for ashort data record (Hosking 1990; Hosking and Wallis1997; Katz et al. 2002; Gilleland and Katz 2006). In addition,regional statistics, rather than single grid statistics,will be incorporated to alleviate sporadic behaviorin the short data record (Burn 1990; Hosking and Wallis1997; Endreny and Imbeah 2009). The characteristicsand uncertainty of satellite estimates of extreme precipitation,and the way these uncertainties propagateinto ARI, will be further investigated.With the launch of the Global Precipitation Measurement(GPM) mission (Hou et al. 2014), a new IntegratedMultisatellite Retrievals for GPM (IMERG)will become available at an even higher resolution andaccuracy (0.18 and 1 h; Huffman et al. 2014). The newGPM IMERG data will replace 3B42RT in the futurewith their increased capability for monitoring extremeprecipitation events. As the TRMM–GPM data recordlength grows, these ARI products will be more robustand become increasingly important for research andhazard management.
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