Assessment Reports: IPCC Full Assessment Reports compile the knowledge on climate processes, impact, adaptation and mitigation.
The reports are compiled over a range of five to seven years. More than thousand scientists around the world are involved as authors or reviewers. The reports consist of several volumes of about 1000 pages each.
Special Reports: IPCC Special Reports and technical papers compile the scientific knowledge on specific climate related topics. The reports are compiled by key scientists around the world who act as authors or reviewers.