]Worse still, some of the emails suggest efforts to prevent the publication of work by climate sceptics, or to keep it out of a report by the Intergovernmental Panel on Climate Change. I believe that the head of the unit, Phil Jones, should now resign. Some of the data discussed in the emails should be re-analysed.

Structurally, the IPCC must:

 

Adopt procedures by which scientific reviewers formally approve both the Chapters and the Summary Report for Policymakers. Government delegates should not be part of the approval process. Limit the authority of lead authors and the Chair to introduce changes after approval by the reviewers. Create an ombudsman for each Chapter. These ombudsmen should consult with reviewers who believe valid issues are not being addressed, and disseminate a report for reviewers prior to final approval which is made part of the final document. Institute procedures to ensure that an adequate cross-section of qualified scientists wishing to participate in the process is selected based on unbiased criteria. The ombudsmen should review complaints of bias in the selection process.

There are many specific issues that the IPCC must address as well. For instance, the IPCC must:

 

Ensure that uncertainties in the state of knowledge are clearly expressed in the Summary for Policymakers. Provide highly defensible ranges of the costs of controlling greenhouse gas emissions. Defensibly assess the effects of land-use changes in causing observed temperature increases. Provide highly defensible ranges of the benefits of global warming. Examine the costs and benefits of an adaption strategy versus a mitigation strategy. Adequately examine studies finding a cooling trend of the Continental Antarctic for the last 40 years, as well as increases in the Antarctic ice mass. Adequately explain why the models predict greater warming than has been observed, avoiding use of selective data sets. Ensure an unbiased assessment of the literature on hurricanes. Ensure adequate review of malaria predictions by a range of specialists in the field, ensuring all views are expressed.