Technical description of version 4.5 of the Community Land Model (CLM)

The purpose of this technical note is to describe the biogeophysical and biogeochemical parameterizations and numerical implementation of version 4.5 of the Community Land Model (CLM4.5). Scientific justification and evaluation of these parameterizations can be found in the referenced scientific papers (Chapter 27). This technical note and the CLM4.5 User’s Guide together provide the user with the scientific description and operating instructions for CLM.