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PNNL-TES / rcq10

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Could compare daytime and nighttime Q10s #10

Open bpbond opened 5 years ago

bpbond commented 5 years ago

From continuous Rs data! That might provide an estimate of photosynthesis-contributed Q10.

bpbond commented 5 years ago

E.g. https://www.nature.com/articles/srep37864 - Q10 higher at night than day 🤔

Another: Chang, S.X., Shi, Z., Thomas, B.R., 2016. Soil respiration and its temperature sensitivity in agricultural and afforested poplar plantation systems in northern Alberta. Biol. Fert. Soils 52, 629-641.

bpbond commented 5 years ago

FLUXNET is another possibility, but the concern is the towers are measuring NEE and then modeling, basically, Re. Might not be the strongest evidence.

See also http://dx.doi.org/10.1038/s41559-019-0809-2

jinshijian commented 5 years ago

Hello Ben,

After our talk, I went back and got an idea that I can use the global hourly Rs database to test the night time and day time Q10. The results do support that night Q10 is higher than day time Q10!! Please see the attached figures.

bpbond commented 5 years ago

@jinshijian Huh interesting!

global hourly Rs database

I'm a little confused–which database is this?

jinshijian commented 5 years ago

Oh, sorry for the confusion. I mean the dataset I used for the Rs diurnal pattern analysis https://www.sciencedirect.com/science/article/pii/S0038071718302311 When I collected the data, I also integrated soil temperature when reported, so, for example, each site should have at least one-day continuous measurement (from 1 to 24), then I set 7:00 to 18:00 as daytime, and 19:00 to 6:00 as night time (same as above SBB paper), whenever one site has more than 6 measurements (both Rs and Tsoil), I simulated the relationship: Rs=aexp(bTsoil), if p-value for b < 0.1, then I calculated Q10 = exp(b*10). Then I got above results (Q10=2.39 for daytime, and Q10 = 2.61 for nighttime). Thanks

jinshijian commented 5 years ago

More specific, should be more than 6 Rs~Tsoil data for daytime and night time.

jinshijian commented 5 years ago

Bello Ben @bpbond, di you also created a repo for Will's model evaluation analysis? It is not in my repo list, can you share that with me? Thanks

bpbond commented 5 years ago

https://github.com/PNNL-TES/landmodels