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Arctic Sea Ice Extent (Annual Average)

Observations of annual average Arctic sea ice extent for the period 1900 to 2008. The gray shading indicates less confidence in the data before 1953. Image References: Johannessen1; Fetterer et al.2
References
- 1. [135] Johannessen, O. M.. "Decreasing Arctic Sea Ice Mirrors Increasing CO2 on Decadal Time Scale." Atmospheric and Oceanic Science Letters 1, no. 1 (2008): 51-56.
- 2. [139] Fetterer, F., K. Knowles, W. Meier, and M. Savoie. Sea Ice Index - National Snow and Ice Data Center. Boulder, CO, 2002.
Summary
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