Ed release notes

Work in Progress for ED2.2

ED2.2 currently looks to be a more incremental change compared to the 2.0 -> 2.1 transition

This release will include:

• A number of bug fixes in the land surface model
• Greater flexibility in specifying soil texture

Changes in ED2.1

ED2.1 includes a considerable amount of work conducted in the Moorcroft Lab.

A number of new features were added to ED2.1. An quick but incomplete list includes:

• Coupling to BRAMS
• The addition of a sub-grid scheme to capture landscape-scale environmental heterogeneity
• Refinement of the biophysics / land-surface model
• Addition of a finite-canopy-radius radiation scheme

Major implementation changes included a complete re-write of the original C code into FORTRAN 90 and a change in the memory structures from linked lists to vector format.

Changes in ED2.0

This code was never publicly released but served as the basis of David Medvigy's dissertation research (Medvigy 2006) and a number of his publications on New England forests (Medvigy et al 2009, 2010).

ED2.0 included a large number changes from the original ED framework. Most striking was the addition of a biophysical land surface model and the coupling of ED to RAMS (the Regional Atmospheric Modeling System). While the original ED model was written in C, most of this new code was written in Fortran 90. ED2.0 also incorporates later changes that were made within the ED1.0 framework but not in the original code release. Most notable among these was Marco Albani's land use change code and his initial parameterization for temperate forest.