1. Working Group I Contribution to the IPCC Fifth Assessment Report Climate Change 2013:
The Physical Science Basis:
SPM
Jose A. Marengo
RE, Chapter 2 WGI

5. (IPCC 2013, Fig. SPM.1a)

8. Annual mean Arctic summer sea ice
start of satellite data
(IPCC 2013, Fig. SPM.2)
Annual mean Arctic summer sea ice extent decreased very likely with a rate of % per decade in 1979 – decrease was most rapid in summer (high confidence).
Data normalized to the satellite measured sea ice extent in 1979

20. (IPCC 2013, Fig. SPM.Table.1)

27. (IPCC 2013, Fig. SPM.10)