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Monthly/Seasonal Averages

Seasonally Averaged Field

CO2 Volume Mixing Ratio at 510.9 hPa

2011

Apr - May Apr - May 11
Jun - Aug Jun - Aug 11

2010-2011

Apr - May Apr - May 10-11
Jun - Aug Jun - Aug 10-11
Sep, Nov Sep, Nov 10-11
Dec - Feb Dec - Feb 10-11

2009

Apr - May Apr - May 09
Jun - Aug Jun - Aug 09
Sep - Nov Sep - Nov 09
Dec - Feb Dec - Feb 09

2008-2009

Apr - May Apr - May 08-09
Jun - Aug Jun - Aug 08-09
Sep - Nov Sep - Nov 08-09
Dec - Feb Dec - Feb 08-09

2007-2008

Apr - May Apr - May 07-08
Jun - Aug Jun - Aug 07-08
Sep - Nov Sep - Nov 07-08
Dec - Feb Dec - Feb 07-08

2006-2007

Apr - May Apr - May 06-07
Jun - Aug Jun - Aug 06-07
Sep - Nov Sep - Nov 06-07
Dec - Feb Dec - Feb 06-07

2005-2006

Apr - May Apr - May 05-06
Jun - Aug Jun - Aug 05-06
Sep - Nov Sep - Nov 05-06
Dec - Feb Dec - Feb 05-06

2004-2005

Sep - Nov Sep - Nov 04-05
Dec - Feb Dec - Feb 04-05
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