“2019 years”. climate-lab-book.ac.uk (30 January 2020). 2 February 2020時点のオリジナルよりアーカイブ。2 February 2020閲覧。 ("The data show that the modern period is very different to what occurred in the past. The often quoted Medieval Warm Period and Little Ice Age are real phenomena, but small compared to the recent changes.")
“2019 years”. climate-lab-book.ac.uk (30 January 2020). 2 February 2020時点のオリジナルよりアーカイブ。2 February 2020閲覧。 ("The data show that the modern period is very different to what occurred in the past. The often quoted Medieval Warm Period and Little Ice Age are real phenomena, but small compared to the recent changes.")
