[gradsusr] Averaging Multiple Data sets with Different Temporal Resolutions

[Perry, Aaron]

I have a hypothetical question...


If you were to blend multiple data sets together with varying temporal resolutions, (and after lterp'ing them all to the same grid) what would happen with one of the data sets if it's data time ran out before the others did?


Ex.


ND = No Data


TAU     0       6       12      18      24      30      36      42      48      54      60      66      72      78      84      90      96      102     108     114     120     126     132     138     144     150     156     162     168     174     180     186     192     198     204     210     216     222     228     234     240
GFS     -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -
CMC     -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -
ECM     -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -
NAM3    -       -       -       -       -       -       -       -       -       -       -       ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND
NAM12   -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND      ND


'define blend = (GFS+CMC+ECM+NAM3+NAM12)/5.0'


Would the sudden data drop-out in the average result in 0s being introduced into the average? How would you keep the data (last valid timestep) that runs out included in the overall average?


Cheers,


Aaron D. Perry
Class of 2016
Lyndon State College
Lyndonville, VT 05851
Twitter: @arnpry<https://twitter.com/arnpry>
Email: Aaron.Perry at lyndonstate.edu<http://Aaron.Perry@lyndonstate.edu/>
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