September 5, 2008
-----------------

Version 1 of the Level 2, 3, and 4 files for the Howland Forest Main site
(US-Ho1) was posted.


February 5, 2010
----------------

Version 2 for the L2 files was posted.  Version 2 contains updates
through 2008 but also reflects a re-processing over the entire period of
record using the u-star correction methods of FLUXNET Canada (specifically
Alan Barr).  


December 21, 2010
-----------------

Version 3 (V003) of the US-Ho1 Level 2 (L2) files was posted.  V003
contains updates through 2009 but again reflects a re-processing over
the entire 1996-2009 period of record and thus replaces all previous
US-Ho1 data.


March 14, 2016
--------------

Version 4 (V004) of the Level 2 (L2) files for the Howland Forest Main
site (US-Ho1) was posted.  V004 contains updates through 2014 but again
reflects a re-processing over the entire 1996-2014 period of record and
thus replaces all previous US-Ho1 data.

Details on the changes made by CDIAC during processing from the original
Level 1 files provided by Holly Hughes and Dave Hollinger to the V004
L2 posted today are provided in

ftp://cdiac.ornl.gov/pub/ameriflux/data/Level2/Sites_ByName/Howland_Forest_Main/with_gaps/report_Howland_Forest_Main.html