I have just published an article, together with my colleague Ramesh Krishnamurthy who is a linguist. We analysed full text coverage of newspaper coverage on climate change in the USA, the UK, France and Germany over a 20 year period, using special software. We found some interesting results, for example, that different terms invoke different associations. Key concepts like 'global warming' and 'climate change' have different collocates in different countries. Some countries are emphasizing the scientific dimension whereas others are stressing political or moral aspects. You can read the full article here
Bear in mind that this is a pilot study based on uncleaned data downloaded from Nexis-Lexis, Our dataset stops in 2007. We are working on an updated and cleaned dataset, with a much more refined analysis. Watch this space!