As the United Nations Climate Change Conference is taking place in Cancun, Mexico as I type; from 29 November to 10 December 2010, I though I would look at some historical data.
The chart below shows the min temperatures for November from 1914 to 2008, as recorded at Valley, Anglesey. The raw data is available on the Met Office website. The red line is the trend line (linear), which shows the min temp decreasing over time (less cold in other words).
I’m not claiming that this alone proves global warming, it most likely shows a change in the seasons, we do experience milder autumns. But if that is the effect, then maybe global warming is the cause.
The chart below shows the min temperatures for November from 1914 to 2008, as recorded at Valley, Anglesey. The raw data is available on the Met Office website. The red line is the trend line (linear), which shows the min temp decreasing over time (less cold in other words).
I’m not claiming that this alone proves global warming, it most likely shows a change in the seasons, we do experience milder autumns. But if that is the effect, then maybe global warming is the cause.
Also remember the earth's wobble, and its constantly changing path around the sun. The chart below (data from Redshift) shows the nearest distance the earth gets to the sun (perihelion), as you can see we are in the current cycle where we are moving further away from the Sun during winter and conversely closer during summer. You would think therefore our summers should be warmer and our winters colder . The perihelion-aphelion distance will be equal sometime after 38,000 AC.
The reason why this winter is so cold could be explained by the perihelion chart below, and why next winter it could be even colder, before it starts to warm up again.
