Well-known climate scientist Michael Mann made good on his threat to sue the National Review and columnist Mark Steyn for defamation based on statements made online questioning Mann’s global warming research. In response, the defendants filed a special motion to dismiss under D.C.’s anti-SLAPP statute, arguing that the online statements were made in furtherance of the right of advocacy on an issue of public interest. The court found that the anti-SLAPP statute did apply but nevertheless denied the motion.
Mann is a professor of meteorology and the Director of the Early System Science Center at Penn State. He is well known for his research on global warming and has published papers and books on the subject. The University of East Anglia’s Climate Research Unit (CRU) exchanged emails with Mann which were later misappropriated. In one email, a CRU scientist referred to Mann’s “nature trick” of adding in real temperatures for the last twenty years and from 1961 to “hide the decline.” Upon discovery of the emails, the University of East Anglia investigated the matter and concluded that the honesty and rigor of the CRU scientists was not in doubt but that the email referencing Mann’s “nature trick” was misleading.
In 2010, Penn State initiated an investigation of Mann and the CRU emails. The investigatory committee was comprised entirely of Penn State faculty members. Based on an interview with Mann, the committee cleared Mann of three of four charges against him. The last charge involved an allegation that Mann’s research might deviate from accepted norms. The committee interviewed an MIT professor who was critical of Mann’s work and later expressed dismay with the scope of the investigation and the committee’s analysis of the CRU emails.