September 4, 2008
---------------------

Version 1 files were archived and Version 2 L2 files were posted.
The new Version 2 files contain a modified header reflecting minor
changes to the AmeriFlux fair-use data policy and include 2007 data.


October 13, 2008
-----------------------

Version 2 L3 and L4 files were posted including data for 2007.


August 24, 2009
-----------------------

Version 3 L2 files were posted including data for 2008.  Pre-2008 data
did not change.


April 1, 2010
-------------

Version 4 of the L2 files for Tonzi Ranch (US-Ton) were posted including
data for 2009.  Pre-2009 data did not change from Version 3.


October 18, 2011
----------------

Version 5 (V5) of the L2 files for Tonzi Ranch (US-Ton) were posted
including data through 2010.  Latent heat fluxes and soil heat fluxes
have been corrected (e.g., the soil heat fluxes were adjusted due to
litter accumulation over the soil heat flux plate) and replace all
previous values.  Details on the processing of original files by CDIAC
to produce the V5 Level 2 files may be found at

/pub/ameriflux/data/Level2/Sites_ByName/Tonzi_Ranch/with_gaps/Tonzi_Ranch_SummaryReport.htm