From that same quoted article.
“The paper has been criticised for not being peer reviewed and other climate scientists have refuted the conclusions reached by Kauppinen and Malmi. Critics have said that in addition to not being peer reviewed, Malmi and Kauppinen fail to provide correct physical explanation, have not linked to- or sited to enough sources to support their claims and although they denounce climate models, they use one themselves to prove their own points.”