GRIB2 - CODE TABLE 4.7

DERIVED FORECAST

In Section 4, Octet 35 - for product templates 2-4 and 12-14

Revised 11/19/2013
Red text depicts changes made since 12/21/2011



Code Figure Meaning
0
Unweighted Mean of All Members
1
Weighted Mean of All Members
2
Standard Deviation with respect to Cluster Mean
3
Standard Deviation with respect to Cluster Mean, Normalized
4
Spread of All Members
5
Large Anomaly Index of All Members (see Note 1)
6
Unweighted Mean of the Cluster Members
7
Interquartile Range (Range between the 25th and 75th quantile)
8 Minimum Of All Ensemble Members (see Note 2)
9 Maximum Of All Ensemble Members (see Note 2)
7-191
Reserved
192-254
Reserved for Local Use
192
Unweighted Mode of All Members
193
Percentile value (10%) of All Members
194
Percentile value (50%) of All Members
195
Percentile value (90%) of All Members
196
Statistically decided weights for each ensemble member
197
Climate Percentile (percentile values from climate distribution)
255 Missing


Notes:

1.  Large anomaly index is defined as {(number of members whose anomaly is higher than 0.5*SD) - (number of members whose anomaly is lower than -0.5*SD)}/(number of members) at each grid point.  SD is the observed climatological standard deviation.

2.  It should be noted that the reference for "minimum of all ensemble members" and "maximum of all ensemble members" is the set of ensemble members and not a time interval and should not be confused with the maximum and minimum described by Product Definition Template 4.8.


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