The paper Constraining DALEC v2 using multiple data streams and ecological constraints: analysis and application” by Sylvain Delahaies, Ian Roulstone, and Nancy Nichols (Reading) has just been published in the journal Geoscientific Model Development, published by the European Geophysical Union.  The paper uses a variational method to assimilate multiple data streams into the terrestrial ecosystem carbon cycle model DALEC v2.  The paper is open access and can be downloaded here.