Suggested caption:

Global average temperatures show that the Medieval Warm Period was not a planet-wide phenomenon, and that the Little Ice Age was not a distinct planet-wide time period but rather the end of a long temperature decline that preceded recent global warming.<ref name=Hawkins_20200130>{{cite web |last1=Hawkins |first1=Ed |title=2019 years |url=https://www.climate-lab-book.ac.uk/2020/2019-years/ |website=climate-lab-book.ac.uk |archiveurl=https://web.archive.org/web/20200202220240/https://www.climate-lab-book.ac.uk/2020/2019-years/ |archivedate=February 2, 2020 |date=January 30, 2020 |url-status=live }} ("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.")</ref>

Source: derived from graphic by:

• Hawkins, Ed, 2019 years. climate-lab-book.ac.uk (January 30, 2020). Archived from the original on February 2, 2020.
• Hawkins cites data sources: "PAGES2k (and HadCRUT4.6 for 2001—2019")
• Bottom of Ed Hawkins' professional blog page states: "These blog pages & images are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License."
• Archive link to Hawkins original PNG image: https://web.archive.org/web/20200302051704/http://blogs.reading.ac.uk/climate-lab-book/files/2020/01/lia_mwp-1.png

Graphics notes:

1. Version 1 SVG includes two invisible layers:

- a bitmap image of the black trace and gray area

- a bitmap imate of the entire Ed Hawkins graphic, used to properly align graph & axes etc.

1. To reduce file size, Version 2 will exclude these two invisible layers.