Daarin wordt uitgelegd dat er een grotere opwarming is waargenomen boven land dan boven zee.
"A global warming of 1.5°C implies warmer mean temperatures compared to pre-industrial times in almost all locations on both land and oceans (high confidence) (Figure 3.3). In addition, differences resulting from 1.5°C and 2°C global warming are detectable in mean temperatures in almost all locations on both land and ocean (high confidence). The land-sea contrast in temperature warming is important and implies particularly large changes in temperature over land, with larger mean warming than 1.5°C in most land regions (high confidence; see Section 3.3.2 for more details). The highest warming of the mean temperature is found in the northern high latitudes (high confidence; Figure 3.3, see Section 3.3.2 for more details)."
Quote van hoofdstuk 3.3, IPCC rapport SR15: http://report.ipcc.ch/sr15/pdf/sr15_chapter3.pdf