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I have hourly-observed gross primary production data with the unit as µmol m-2 s-1, how can I convert it to daily data with unit of gC/m2/day? The data is like this:

2011-01-01 02:00:00        -0.0
2011-01-01 05:00:00        -0.0
2011-01-01 06:00:00        -0.0
2011-01-01 07:00:00        -0.0
2011-01-01 08:00:00        -0.0
2011-01-01 10:00:00   -0.019085
2011-01-01 13:00:00        -0.0
2011-01-01 15:00:00        -0.0

I guess I need to convert µmol to mol by dividing 106, then multiply by the molecular weight of carbon (12). After that, I need to convert the s-1 to per day by multiplying 3600*24, but do I need to sum over all data in 2011-01-01 or take the mean value because GPP is a flux data?

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