Information for pair0078:

Light Response Data

Taken at a flux tower at site DE-Hai
latitude: 51.08?N
longitude: 10.45?E

The filtered version of the data is taken from:

Moffat A.M. (2012): Assessing competing semi-empirical equations:
Light response curve (Chapter 7). In: /A new methodology to interpret
high resolution measurements of net carbon fluxes between terrestrial
ecosystems and the atmosphere/. pp. 68-80. Doctoral thesis, Friedrich
Schiller University, Jena.

- Response of NEP on total PPFD

First column (x): PPFD (Photosynthetic Photon Flux Density)
- a measure of light intensity in terms of photons, that are available for photosynthesis
- i.e. the number of photons falling on a 1 meter square area per second
- only the photons with a wavelength of 400-700nm (visible light) are available for photosynthesis
- unit [?mol/(m?s)]
PPFD(total) = PPFDdif + PPFDdir


Second column (y): NEP (Net Ecosystem Productivity)
- a measure of the carbon flux
- calculated by photosynthetic uptake MINUS release by respiration
- is known to be driven by PPFD
- unit: [?mol/(m?s)]


ground truth

x -> y