Chris Bowen, Australia's climate minister and president of negotiations for COP31, said every fraction of a degree above 1.5°C hits the Pacific, and that the Antalya conference is the chance to turn ambition into action. [1] H.E. Murat Kurum, COP31 president-designate, said exceeding 1.5°C should not be treated as a new destination. The conference, he said, must electrify, cut methane from waste, harden cities, and protect coasts. [1] Those are named owners of an overshoot pathway. They are not a thermometer reading today.
Wednesday's file held UN News's "fight for 1.5" against Climate Home's 1.8°C peak condition and a 2.8°C path under funded policy. Thursday's usable advance is the COP31 handoff plus UNEP's own explainer, now fetchable, which tells governments to approach 1.5 from above. Do not rerun "1.5 is dead" as a first-time scoop. The slogan is still not current law.
UNEP's press release, dated Nairobi, September 2, puts the best-case peak at 1.8°C above pre-industrial levels. Most other scenarios sit over 2°C. [1] "Overshoot, peak and decline" is "the best remaining option" to keep the exceedance small and short and try to return below 1.5°C. [1] Inger Andersen, UNEP's executive director, said there are no good outcomes if temperatures remain above 1.5°C consistently. "A return to 1.5C is not assured." [1] [4] That sentence is a condition. It is not a measurement of today's global mean.
The explainer is blunter about the calendar. 2024 was the first year the average global temperature exceeded 1.5°C above pre-industrial levels. Scientists still assess climate over decades, not one year. [2] If all climate commitments and policies are implemented, warming is projected to reach 1.8°C at a minimum. [2] Mirey Atallah, who coordinates the report at UNEP, said decisions and mindsets "need to shift to seeing 1.5°C as a goal we'll be approaching from above rather than below." [2] The pathway the authors describe has four stages: exceedance, a peak ideally kept below 2°C, decline, then stabilization. The downward side is not given. It depends on cuts made now. [2] Carbon dioxide removal "is not a substitute for rapid emission reduction." Models give it only a few tenths of a degree of reversal this century. [2] Conventional CDR needs land and can lose stored carbon to fire and drought. Novel CDR is unproven and expensive. [2] Those are stages on a curve. They are not a durable annual-mean breach printed this morning.
Kurum's COP31 list is the diplomatic translation of that curve: accelerate electrification, cut waste methane, strengthen urban climate resilience, and harden marine and coastal ecosystems, with mitigation and adaptation moving together. [1] Bowen put the Pacific on the front line of every extra fraction of a degree and called the recent energy crisis a reminder to cut fossil-fuel dependence. [1] That is a conference agenda. It is not a finding that 1.5°C has already been measured as a lasting global mean this week.
Climate Home, working the same report on Wednesday, printed the number that decides whether the slogan is law. A return below 1.5°C by 2100 appears only if governments deliver their full national climate plans and then meet additional net-zero targets. [4] Current measures that are funded and in force still point to about 2.8°C by 2100, a figure UNEP previously published in its 2025 emissions-gap report. [4] The path back is an optimistic NDC-plus-net-zero case. It is not the statute book.
UN News still sells the older frame. António Guterres called the fight for 1.5 "the fight for humanity" and said the world is "set to breach the 1.5°C limit within the next few years." [3] He wants the overshoot "as small and short as possible," which "demands an overshoot of ambition." [1] [3] A reader of only that headline would think Thursday restored 1.5 as operating law. A reader of Bowen and Kurum would see COP31 already writing the script for a world that arrives at the goal from above. Collapse accounts will call Paris dead. Denial accounts will call the report a sermon. Neither side has to read the 2.8. The paper's job is the ownership. The negotiating object is now overshoot. Funded policy is still the hotter path.
-- KENJI NAKAMURA, Tokyo