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How was the Graphcast Small 1.0 degree Reanalysis made? #72

Closed tvonich closed 4 months ago

tvonich commented 5 months ago

Hello, Was it simply e quarter degree reanalysis values pulled from whole number lat/lon positions or were the values actually averaged over the 1.0 degree region?

alvarosg commented 4 months ago

Thanks for your message.

It was done by bilinear interpolation, which for this grid is indeed equivalent to pulling the values at the whole lat/lon positions.

It was done this way so the 1 deg values would match the statistics of the 0.25 deg values, and the metrics could be compared across resolutions.

Hope this helps!