Periodic Review

The long-term global goal is to hold the increase in the global average temperature to well below 2°C above pre-industrial levels, and to pursue efforts to limit the temperature increase to 1.5°C above pre-industrial levels, recognizing that this would significantly reduce the risks and impacts of climate change.


This long-term global goal was agreed by the COP in December 2015 (see paragraph 4 of Decision 10/CP.21 on the 2013-2015 review). It is also reflected in Article 2.1(a) of the Paris Agreement (see Decision 1/CP.21 and its annex). The outcome of the 2013-2015 review was a contributing factor to Parties' strengthening of the long-term global goal.

The periodic review

In 2010, Parties had agreed on a long-term global goal to reduce GHG emissions so as to hold the increase in global average temperature below 2°C above pre-industrial levels. The COP also decided to periodically review: (1) the adequacy of the long-term global goal in the light of the ultimate objective of the Convention, and (2) overall progress toward achieving the long-term global goal, including a consideration of the implementation of the commitments under the Convention. See decision 1/CP.16, paragraphs 138-140 for more information. One year later, the COP decided to establish a structured expert dialogue (SED) to support the review and to ensure scientific integrity through a focused exchange of views, information and ideas. The final report on the SED is contained in FCCC/SB/2015/INF.1. The first periodic review was the 2013-2015 review. It led to the decision (10/CP.21) on the new long-term global goal that was agreed in 2015.

Current status of discussions

COP 23 requested the SBs to resume their consideration of this matter at SB 50 in June 2019, with a view to forwarding a recommendation to COP 25 (November 2019) (see decision 18/CP.23 in addendum 2 of the COP 23 report, FCCC/CP/2017/11/Add.2). This was to allow for the consideration of this agenda item to take into account the relevant work on the global stocktake under the Ad Hoc Working Group on the Paris Agreement, and the Talanoa Dialogue, which will take place in 2018, as well as the technical examination processes.