Monthly anomalies are derived by subtraction of a deterministic signal model (bias, trend, annual and semi-annual variations) from the monthly solutions. The signal model is fitted to the monthly means of all time-series in the common period 2004-2010. The accuracy assessment (errors) of the combined solutions is derived empirically from the differences to the individual contributions.

month	anomalies (60)	anomalies (90)	formal errors (90)
04/2002
05/2002
08/2002
09/2002
10/2002
11/2002
12/2002
01/2003
02/2003
03/2003
04/2003
05/2003
07/2003
08/2003
09/2003
10/2003
11/2003
12/2003
01/2004
02/2004
03/2004
04/2004
05/2004
06/2004
07/2004
08/2004
09/2004
10/2004
11/2004
12/2004
01/2005
02/2005
03/2005
04/2005
05/2005
06/2005
07/2005
08/2005
09/2005
10/2005
11/2005
12/2005
01/2006
02/2006
03/2006
04/2006
05/2006
06/2006
07/2006
08/2006
09/2006
10/2006
11/2006
12/2006
01/2007
02/2007
03/2007
04/2007
05/2007
06/2007
07/2007
08/2007
09/2007
10/2007
11/2007
12/2007
01/2008
02/2008
03/2008
04/2008
05/2008
06/2008
07/2008
08/2008
09/2008
10/2008
11/2008
12/2008
01/2009
02/2009
03/2009
04/2009
05/2009
06/2009
07/2009
08/2009
09/2009
10/2009
11/2009
12/2009
01/2010
02/2010
03/2010
04/2010
05/2010
06/2010
07/2010
08/2010
09/2010
10/2010
11/2010
12/2010
02/2011
03/2011
04/2011
05/2011
07/2011
08/2011
09/2011
10/2011
11/2011
12/2011
01/2012
02/2012
03/2012
04/2012
06/2012
07/2012
08/2012
09/2012
11/2012
12/2012
01/2013
02/2013
04/2013
05/2013
06/2013
07/2013
10/2013
11/2013
12/2013
01/2014
03/2014
04/2014
05/2014
06/2014
08/2014
09/2014
10/2014
11/2014
01/2015
02/2015
03/2015
04/2015
05/2015
07/2015
08/2015
09/2015
12/2015
01/2016
02/2016
03/2016
05/2016
06/2016
07/2016
08/2016
11/2016
12/2016
01/2017
03/2017
04/2017