Image talk:Solar variation and global warming.gif
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I don't believe the solar avtivity data on this graph (thick grey) William M. Connolley 14:00, 26 March 2007 (UTC)
- The data presented as "Solar Data" in the graph is a solar proxy in the form of 14C. More importantly the timescale used for "Solar Data" is the time-scale of 14C which lags 60 behind changes in solar activity (that is, if solar activity increases in 1900, we can expect to see corresponding changes in 14C around 1960), thus misrepresenting solar activity changes as occuring 60 years later than they actually do. Furthermore, by using proxy data rather than actual raw solar data (e.g sunspot number, for which there are very detailed records this century) more errors are introduced: 14C records are unreliable after 1950 due to nuclear testing, and post-1950 provide a poor proxy for solar data (which means solar data from 1890 onward is no longer well recorded in 14C).
- For a comparison of actual solar data with temperature see Image:Temp-sunspot-co2.svg. -- Leland McInnes 16:12, 26 March 2007 (UTC)
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- OK, thats what I thought. On that basis I've delted the graph as its wrong William M. Connolley 16:59, 26 March 2007 (UTC)
