In climate circles, the so - called «hockey stick» curve of rising temperatures is well known. (environmentalresearchweb.org)
It's likely that some foreign dignitaries have politely talked about climate change in their congratulatory phone calls, according to people in international climate circles. (scientificamerican.com)
Over the last several years, there has been quite a bit of debate in climate circles over historical temperature reconstructions from various «proxies» like ice cores and tree ring widths. (climate-skeptic.com)