ERA5 vs ERA5-Land Temp differences

Datasets and Usage C3S - Datasets and Usage
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Hi,

I’m comparing ERA5 vs ERA5-Land T2m temperatures and finding some (a lot) of significant differences,

In many cases as much as 5 deg K

Is there an explanation for such significant differences, I was expecting some but not to this extent.

e.g., at Lat 47, Lon 1.0 on 2024-12-27 16:00

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Thanks

Mark