It is worth noting that on the IPCC website http://.ipcc.ch (see Organization link on the left ) it states that
“The IPCC is a scientific body. It reviews and assesses the most recent scientific, technical and socio-economic information produced worldwide relevant to the understanding of climate change. It does NOT conduct any research NOR does it monitor climate related data or parameters. Thousands of scientists from all over the world contribute to the work of the IPCC on a voluntary basis. Review is an essential part of the IPCC process, to ensure an objective and complete assessment of current information. Differing viewpoints existing within the scientific community are reflected in the IPCC reports.”
Comment: Garbage in-Garbage out

The disclaimer on not monitoring “climate related data or parameters” is a fairly recent change, which until the other day could be determined by going to the way-back machine http://www.archive.org/ and looking up the ipcc web site. However, now all the links I tried returned “Not in Archive”.
This looks like a coverup. Unless you try it, don’t come back and say that it is not.