help with enabling hourly plotting and analysis in JULES/FLUXNET suite, for CSSP/PORCELAIN

[pmcguire]

Patrick

Can you help with enabling hourly plotting and analysis in the JULES/FLUXNET suite u-al752 (Python post-processing), for the CSSP/PORCELAIN project? We want to do the RSME of the difference between the FLUXNET observations (ignoring the night-time data) and the JULES models for the 10 China FLUXNET sites. Currently, the daily averages are being plotted and analyzed instead of the hourly data.

Chris H

[pmcguire]

From ChrisH (chuntingford): [edited for this ticket]
Chris & Karina talked about Lina's idea of only looking at daytime values, in the optimisation. That is, ignoring invariant night or twilight values. This might give strong clues to the true optimum.

Changing all the existing RMSE code with a sub-daily mask might take some time, and Karina has a better way. This is to adapt code below, that explicitly looks at the diurnal cycle. Here:

​https://code.metoffice.gov.uk/trac/roses-u/browser/a/l/7/5/2/u-al752-jpegpaper/bin/plot_diurnal.py

Sample plots attached. One is for one month, all days of FLUXNET. The simpler plot is the diurnal cycle.

So if we can make some plots similar to "FR_Puediurnal_GPP.PNG", we will be in a strong position to really get at good parameters.

In summary, this builds on what we've been doing in Reading, but gets more directly at looking at sub-diurnal features. More "by eye" checking.

[pmcguire]

The plot_diurnal.py code has been adapted for JASMIN, and the hourly data for the Chinese FLUXNET sites has been obtained from Karina.
Patrick