April 13, 2007
--------------

The first version of the Level 2 files for the Santa Rita Mesquite
Savanna, Arizona site (US-SRM) was posted and provides data from 2004
through 2006.


November 15, 2007
-----------------

Version 1 of the Level 3 and 4 files for US-SRM was posted.


March 10, 2008
--------------

Version 2 (V002) of the Level 2 files for US-SRM was posted.  The new files
contain 2007 data and revisions to the longwave and net radiation fluxes
for 2005 and 2006.  Data for 2004 are unchanged from Version 1.


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

Version 2 of the L3 and L4 files for US-SRM was posted.


December 4, 2008
----------------

Version 3 of the Level 2 files for US-SRM was posted.  The new files
contain revisions to the soil heat fluxes for 2004-2007. The new files
are presented and reported in the AmeriFlux network-wide conventions
for variable names and units, and time reporting intervals.


June 7, 2010
------------

Version 4 (V004) of the Level 2 files for US-SRM was posted.  The new
files contain updates through 2009.  Data prior to 2008 did not change
from version 3 in the L2 files.


March 25, 2011
--------------

Version 5 (V005) of the Level 2 (L2) files for US-SRM was posted.
The new files provide data through 2010.  Fc values for 2004-2009
were revised from previous versions of the L2 files.  Specifically,
new Fc values were re-computed after adjusting the WPL water vapor term
resulting in very small changes in Fc flux.


January 4, 2013
---------------

Version 6 (V006) of the L2 files for the US-SRM site was posted and
provides data through 2011.  Flux terms, including Fc, H, and LE,
for all previous years (i.e., 2004-2010) were re-processed to account
for frequency response corrections after multi-year comparison with
closed-path analyzer systems.  For 2004 through 2007, ground heat flux
values were re-calculated to reflect an improved heat storage term.


April 2, 2013
-------------

Version 7 (V007) of the L2 files for the US-SRM site was posted and
provides data through 2012.  The CO2 storage term estimates for 2010
and 2011 were modified and replace the estimates provided in previous
versions.  


November 12, 2013
-----------------

Version 8 (V008) of the L2 files for the US-SRM site was posted and
provides data through 2012.  The major difference from V007 was the
refinement and recalculation of PAR and PAR_out values from 2004-2010.


March 20, 2014
--------------

Version 9 (V009) of the L2 files for the US-SRM site was posted and
provides data through 2013.  Pre-2013 data did not change from V008.


June 3, 2014
------------

Version 10 (V010) of the Level 2 (L2) files for the Santa Rita Mesquite
Savanna site in Arizona (US-SRM) have been posted.  V010 files cover the
period 2004 to 2013.  The main change from V009 is a revision of Rg for
August 2007.


May 28, 2015
------------

Version 11 (V011) of the Level 2 (L2) files for the Santa Rita Mesquite
Savanna site (US-SRM) have been posted and cover the period 2004 to 2014.


December 22, 2015
-----------------

Version 12 (V012) of the Level 2 (L2) files for US-SRM was posted
and provides data from 2004 through 2014. V012 replaces all previous
versions and reflects a correction on the time stamp across the entire
period of record.  Measurement values and estimates in V012 did not
change from V011.

Details on the processing of the orginal Level 1 files provided by Russ
Scott by CDIAC to produce these V012 L2 files are provided at

ftp://cdiac.ornl.gov/pub/ameriflux/data/Level2/Sites_ByName/Santa_Rita_Mesquite_Savanna/with_gaps/report_Santa_Rita_Mesquite_Savanna.html