Editing IPCC:AR6/SRCCL/Chapter-2 (section)

==== Future terrestrial carbon source/sink ====

AR5 projected with ''high confidence'' that tropical ecosystems will uptake less carbon and with medium confidence that at high latitudes, land carbon sink will increase in a warmer climate. Thawing permafrost in the high latitudes is potentially a large carbon source in warmer climate conditions, however the magnitude of CO <sub>2</sub> and CH <sub>4</sub> emissions due to permafrost thawing is still uncertain. The SR15 further indicates that constraining warming to 1.5°C would prevent the melting of an estimated permafrost area of 2 million km <sup>2</sup> over the next centuries compared to 2°C. Updates to these assessments are found in Section 2.3.

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