“Holding the increase in the global average temperature to well below 2°C above pre-industrial levels and pursuing efforts to limit the temperature increase to 1.5°C above pre-industrial levels…” (Article 2.1(a))
But, from where did this language come?
All through the ADP’s final year of negotiations, from Lima to Geneva to Bonn and back to Bonn, it never appeared in the successive drafts. The “well below 2°C” finally emerged in brackets at the last negotiating session before COP21, on the final day of ADP2-11.
The likely source? Something called the structured expert dialogue (SED).
The story begins back at COP16 in 2010, when Parties agreed to reduce emissions so that global temperature would not exceed 2°C above pre-industrial levels. They also agreed to periodically review this goal to determine whether it was sufficient to meet the UNFCCC’s objective, and whether the Parties were achieving it. Importantly, the Parties decided at COP16 to consider strengthening the 2°C goal, “including in relation to a global average temperature rise of 1.5°C.”
This mandated review happened between June 2013 and February 2015 at a Joint SBSTA/SBI meeting. It was supported by a structured expert dialogue (SED) to “ensure the scientific integrity of the review through a focused exchange of views, information and ideas.” The SED involved more than 70 experts and Parties over 4 sessions. The group released its final report last May for all UNFCCC Parties to consider it at the 42nd session of the subsidiary bodies in June.
Two of the SED’s key messages were:
- “The world is not on track to achieve the long-term global goal, but successful mitigation policies are known and must be scaled up urgently.” (Message 8)
- “While science on the 1.5°C warming limit is less robust [making it difficult to compare differences between 2°C and 1.5°C], efforts should be made to push the defence line as low as possible.” (Message 10)
Message 10 also suggested that Parties consider a precautionary path: “aiming for limiting global warming as far below 2°C as possible, reaffirming the notion of a defence line or even a buffer zone keeping warming well below 2°C.”
While not offering the exact language on 1.5°C found in Article 2 of the Paris Agreement, the SED report clearly articulates climate change impacts already being experienced, limits to adaptation, and certain and non-linear increases in those impacts expected between 1.5 and 2°C.
Both IISD’s Earth Negotiations Bulletin (ENB) and the Third World Network (TWN) reported strong differences at the June UNFCCC meeting about what action Parties should take on the Review and SED report. AOSIS, the LDCs and others pushed for sending a draft decision to COP21 for a new long-term global temperature goal of “limiting warming to below 1.5°C above pre-industrial levels.” Saudi Arabia and China were both firmly against changing the long-term goal, and sought language simply acknowledging and appreciating the work/report. Though most Parties supported crafting a substantive conclusion and decision, the lack of consensus on content meant postponement to the SB43 (December 1-4) meeting in Paris. With Saudi Arabia and China (joined by Oman) continuing to block action at SB43, the COP Presidency was ultimately called on to shepherd its direct consideration by the COP.
On the ADP front, the Review and SED report found no apparent foothold in June. By Paris, though, its “well below 2°C” was in the draft and part of the hot debate on long-term temperature goal. The LDCs, AOSIS, the Africa Group and the 40+ country-strong Climate Vulnerable Forum (on which we’ve reported), fought hard for the goal to reference only 1.5°C. The “High Ambition Coalition” (on which we reported here), which included the EU and the U.S., offered strong support. The Saudis, backed by India and China, and unchallenged by the rest of OPEC, firmly blocked it, along with any reference to the SED report. The final compromise language was, in the end, a big step toward acknowledging the climate change dangers already present and the peril posed by a 2°C change.
COP21 did close with a decision (10/CP.21 para 4) that referenced the Review, “took note of the work of the structured expert dialogue,” and offered appreciation for those who participated in it. It also stated the new long-term temperature goal utilized in the Paris Agreement’s Article 2.1(a). “Well below 2°C” is well beyond what could have been.