If we force some parts of our Earth system to change too much they will pass a “tipping point” where a future change to a new, unnatural state is unavoidable and irreversible .
There is little agreement about whether any tipping points will be crossed before 2100  due to a lack of data and the difficulty climate models face in representing these processes . Therefore, a prediction of a particular tipping point being crossed contains a lot of uncertainty .
Although the best climate models nowadays can consider many abrupt changes in climate , some processes are still unexplained . For example, some models do not include the feedbacks causing the collapse of ice sheets [7,8] or those causing damage to vegetation .
Ice sheet and vegetation feedbacks are likely to have a more significant impact on tipping points in future centuries because their response is quite slow so we don’t see their results immediately . Their exclusion from models means there could be even more land-based tipping points .
 https://www.ipcc.ch/sr15/chapter/glossary/ (Tipping Points and Irreversibility)
 https://www.ipcc.ch/site/assets/uploads/2018/02/WG1AR5_TS_FINAL.pdf (TFE.5 Paragraph 2)
 https://www.pnas.org/content/106/13/5041 (Introduction Paragraph 1)
 https://www.pnas.org/content/pnas/112/43/E5777.full.pdf (Discussion Paragraph 4)
 https://www.pnas.org/content/pnas/112/43/E5777.full.pdf (Discussion Paragraph 1)
 https://www.nature.com/articles/d41586-019-03595-0 (Global Cascade Paragraph 7)
 https://www.ipcc.ch/sr15/chapter/glossary/ (Ice Sheets)
 https://www.uu.nl/sites/default/files/lenton_2011.pdf (Page 202 Paragraph 2)
 https://www.pnas.org/content/pnas/112/43/E5777.full.pdf (Discussion Paragraph 3)
 https://www.ipcc.ch/site/assets/uploads/2018/02/WG1AR5_TS_FINAL.pdf (Page 84 Paragraph 2)
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