This document contains details on the forcings used for the CMIP5 historicalMisc simulations (downloaded on 2016-01-28 from https://cmip.llnl.gov/cmip5/docs/historical_Misc_forcing.pdf ).
The CMIP5 experiment identified as "historicalMisc" calls for simulations forced by various combinations of anthropogenic or natural agents. These simulations are meant to be less realistic than the "historical" runs, which include all forcings thought to be important. The "historicalMisc" simulations provide information about the relative importance of different forcings during the historical period.