Arctic CO2 vs NH sea-ice area (detail)

showing daily, northern hemisphere, sea-ice area compared to atmospheric CO2 in the Arctic ( Alert station, Canada ).

CO2 is scaled by a factor of 0.444 to match the annual variation and has a fixed rate of change of 0.824 ppmv / year subtracted.

The long term correlation with this rate of change subtracted can be seen here:
https://climategrog.wordpress.com/?attachment_id=997

data sources:

http://scrippsco2.ucsd.edu/data/atmospheric_co2.html

http://arctic.atmos.uiuc.edu/cryosphere/timeseries.anom.1979-2008