For evapotranspiration we have written a recent analysis paper focussing on boreal forests.. Using most of the long term eddy data available.  It is here under:https://www.researchgate.net/publication/262817262_Latent_heat_exchange_in_the_boreal_and_arctic_biomes

You can convert latent heat exchange  to evapotranspiration by multiplying it with the latent heart of evaporation.

Article Latent heat exchange in the boreal and arctic biomes

https://www2.cgd.ucar.edu/sites/default/files/asp-colloquium/files/Bonan-2008.pdf

For temperate forests of Mexico's northern forest ecosystems, I had calculated NPP values of between 2.5 and 4.0 Mg ha-1 y-1 (See Návar-Cháidez and González-Elizondo, 2009; Polibotanica), with Evapotranspiration values of between 400 and 700 mm (See Návar, 2015 Ecohydrology). The variance of these evaluations is explained partially by Precipitation depth, frequency, and intensity as well as by temperature. Low NPP and high Et values are usually associated with low annual precipitation depth and above normal daily or monthly temperatures.

Hope these sources of information are helpful for your research projects.

Regards

Sincerely

Jose Navar, Ph.D OSU 

For Europe, you can see model simulations compared with MODIS and field data in Dury, M., Hambuckers, A., Warnant, P., Henrot, A., Favre, E., Ouberdous, M., & Francois, L. (2011). Responses of European forest ecosystems to 21st century climate: assessing changes in interannual variability and fire intensity. Iforest-Biogeosciences and Forestry, 4, 82-99. doi:10.3832/ifor0572-004.

Article Responses of European forest ecosystems to 21st century clim...