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Bias Monthly Rain Rate Difference

Bias graph

Figure C. Histogram of monthly rain rate differences from gauge rain rate for TRMM and GPCC rain rates (unit: mm/day) for Oklahoma from January 1998 to November 2003.
*Monthly rain rate difference=Algorithm_rain_rate-Gauge_rain_rate

AlgorithmAverage_bias from the gauge (mm/day)RMSE
3B420.811.41
3B43-0.280.65
TMI0.62.22
TPR0.822.01
TCI0.781.84

Table 4. TRMM algorithms biases and root mean square error (RMSE) against CD rain rates (unit: mm/day).

 3B423B43TMITPRTCIGPCC
Annual33.4-11.424.93432.1-17.5
MAM42.9-8.935.451.846.8-17.8
JJA47.1-12.788.548.938.2-18.9
SON6.8-19.51.113.115-14.9
DJF36.2-1.6-52.611.122.2-18.9

Table 5. Percent bias to CD rain rate for TRMM algorithms and GPCC rain rates.

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Last updated: Oct 09, 2009 03:53 PM ET
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