November 6, 2007
----------------

The first version of the Level 2 files for the Fermi Prairie site
(US-IB2) were posted.


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

New L2 files (Version 2) were posted for US-IB2 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 (V004) L2 files for US-IB2 were posted.  The new files contain
data through October 2009 and include CO2 concentration data for the
first time.


March 5, 2014
-------------

Posted Version 5 (V005) of the Level 2 (L2) files for the Fermi
Prairie site (US-IB2).  V005 offers data for the period 2004 to 2011.
Besides the addition of 2010 and 2011 data, changes from V004 include
minor corrections to precipitation and screening on FC in 2008, a new
UST-filtering on flux terms in the gap-filled files for 2008, and a
revision of soil temperature (TS) in 2005.  


June 6, 2014
------------

Posted Version 6 (V006) of the Level 2 (L2) files for the Fermi
Prairie site (US-IB2).  V006 offers data for the period 2004 to 2011.
V006 differs from V005 for select periods (Nov-Dec 2004; Jan-May 2005;
June-Aug 2010; and Nov 2010) due to reprocessing by the PI (David Cook).

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

ftp://cdiac.ornl.gov/pub/ameriflux/data/Level2/Sites_ByName/Fermi_Prairie/with_gaps/report_Fermi_Prairie.html