November 4, 2007
----------------

The first version of the Level 2 files for the Fermi Agricultural site
(US-IB1) were posted.


September 3, 2008
-----------------

New L2 files (Version 2) were posted for US-IB1 that contain a modified
header record.  The new header is consistent with the header provided
on all other L2 files.  The initial batch of L3 and L4 files were
also posted.


January 15, 2009
----------------

Version 3 L2 files were posted with data through October 2008.  Data from Nov
2006 - Mar 2007 were revised to remove contamination of the fluxes by
snow on the CO2/H2O sensor.

June 21, 2010
-------------

Version 4 L2 files for US-IB1 were posted.  The new files contain data through
October 2009 and include CO2 concentration data for the first time.

Details on CDIAC's processing of the original files submitted by Roser
Matamala and David Cook in order to produce the Level 2 standardized files may
be found at

ftp://cdiac.ornl.gov/pub/ameriflux/data/Level2/Sites_ByName/Fermi_Agricultural/with_gaps/report_Fermi_Agricultural.html