Update The Oreskes abstracts Naomi Oreskes claims to have analysed 928 abstracts she found listed on the ISI Web of Knowledge database 1993 2003 using the keywords global climate change However this claim is incorrect while the ISI database includes a total of 929 documents for the period in question it lists only 905 abstracts It is thus impossible that Oreskes analysed 928 abstracts In my original critique I used the same ISI database and the same key words as Oreskes but used all documents listed therein While Oreskes did not specify the method she applied in her study she later confirmed that she had limited her search to articles while I included all document types in my initial assessment This difference appears to explain the discrepancy between the 928 abstracts Oreskes claims to have analysed and the 1117 documents I found and considered although her figures don t add up one way or another Some commentators have argued that these differences undermine my main criticism while they validate Oreskes claim However as I have stressed repeatedly Oreskes entire argument is flawed as the whole ISI data set includes just 13 abstracts less than 2 that explicitly endorse what she has called the consensus view In fact the vast majority of abstracts do not mention anthropogenic climate change I have posted all documents and abstracts listed in the ISI database under the key words global climate change for the period 1993 2003 below arranged by year Check for yourself Make sure you differentiate between implicit and explicit endorsement of the IPCC consensus M ost of the observed warming over the last 50 years is likely to have been due to the increase in greenhouse gas concentrations 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003