GEUS-Glaciology-and-Climate / mass_balance

Greenland ice sheet mass balance from 1840 through next week
https://doi.org/10.5194/essd-13-5001-2021
GNU Lesser General Public License v3.0
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SMB uncertainty is not fixed at 9 % #21

Open mankoff opened 2 years ago

mankoff commented 2 years ago

SMB uncertainty is 9 % when taking the mean of three RCMs each with 15 % uncertainty.

unumpy.uarray([1,1,1], [15,15,15]).mean()
> 1.0+/-8.660254037844387

But when there are only two RCMs, uncertainty grows to 11 %:

unumpy.uarray([1,1], [15,15]).mean()
> 1.0+/-10.606601717798213

And the full 15 % when only using 1 RCM.