At COP31, ‘overshoot’ narrative cannot replace climate action

1. At a Glance

• Core issue: COP31 opens as the world prepares to officially accept that warming will exceed 1.5°C. The authors argue that the "overshoot" label is replacing scrutiny of options and trade-offs [1].
• Authors' position (opinion, not settled fact): COP31 should focus on accountability for emissions and fulfilment of finance commitments [1].
• Why it matters for UPSC: it links climate science (carbon budget, overshoot, carbon dioxide removal) with climate justice (who used the budget, who pays) [1][2][4].
• Coverage limit: the article text available stops mid-sentence, and no source on COP31 proceedings, India's position or finance figures was retrieved. Those points are marked as gaps, not filled from memory.

2. Why in the News

• COP31, the 31st Conference of the Parties to the UNFCCC, began in Antalya, Türkiye, on Monday, 9 November 2026 [1].
• The backdrop is a year of extreme weather events, human tragedy and a severe energy crisis [1].
• An op-ed by Ankita Ranjan and Tejal Kanitkar (The Hindu, Chennai print edition, 10 November 2026, p. 24) critiques the "overshoot" narrative [1].

3. Background & Evolution

• Origin of the term: "overshoot" emerged in the climate modelling literature and is now being imported into political discussions [1].
• IPCC SR15 (Global Warming of 1.5°C): most 1.5°C-consistent pathways assessed were overshoot pathways [4].
• SR15 rationale: gross CO2 emissions usually exceed the remaining budget by several hundred GtCO2, while carbon dioxide removal is limited before 2050 [4].
• UNEP Emissions Gap Report 2022: full implementation of unconditional NDCs left a gap to the 1.5°C scenario of 23 GtCO2e (range 20–24) [5].
• IPCC AR6 Synthesis Report (2023): found a substantial emissions gap between 2030 emissions implied by NDCs and modelled pathways limiting warming to 1.5°C with no or limited overshoot [3].
• Authors' critique: buzzwords and narratives have obscured legitimate scientific discussion at successive COPs [1].

4. Core Static Facts

• Not retrieved: the Indian nodal ministry, COP31 presidency arrangements, party count, and India's NDC or finance figures.

5. Multi-Dimensional Analysis

Analytical bullets without citations are inferences from the cited facts.

Scientific / Technological

• Budget accounting and overshoot answer different questions. The first asks how much CO2 can still be emitted, and the second describes a temperature path over time [1][4].
• Returning to 1.5°C by 2100 implies removing CO2 after the peak, yet SR15 notes limited removal before 2050 [1][4].
• Research prompt: whether impacts during an overshoot period are reversible was not covered by the retrieved sources.

Environmental

• The authors' preferred objective is to keep warming as little above 1.5°C, and as far below 2°C, as possible [1].
• A focus on returning to 1.5°C later could reduce attention to near-term peak warming.

Geopolitical / Strategic

• The authors say no COP decision has cited the quantitative value of the total or remaining carbon budget, or discussed which countries have spent the most [1].
• Who bears the burden of late-century removals is a distributional question that the term "overshoot" does not itself answer.

Ethical / Governance

• Bringing a modelling term into negotiations can present a political choice as a technical outcome [1].
• Accountability requires attributing emissions to parties, which the authors argue COPs have avoided [1].

Economic

• The authors link credible climate action to fulfilment of finance commitments [1].
• An energy crisis raises the near-term cost of transition choices and sharpens trade-offs for developing economies [1].

6. Recent Developments (last 12-18 months)

• 9 November 2026: COP31 opened in Antalya, Türkiye [1].
• 2026: the year saw extreme weather, human tragedy and a severe energy crisis, while the world prepared to officially accept exceeding 1.5°C [1].
• Gap: no dated 2025–26 negotiating outcomes were retrieved, so none are listed.

7. Prelims Hooks (high-density factual bullets)

• COP31 is being held in Antalya, Türkiye [1].
• COP31 began on 9 November 2026 [1].
• COP31 is the 31st Conference of the Parties to the UNFCCC [1].
• In "1.5°C overshoot", temperature passes 1.5°C in the near term and returns to it by the end of the century [1].
• The term "overshoot" originated in climate modelling literature [1].
• IPCC SR15 found that most 1.5°C-consistent pathways it assessed were overshoot pathways [4].
• SR15 defines the remaining carbon budget as running from the start of 2018 until net-zero global emissions [4].
• SR15's remaining budget is about 420 GtCO2 for a two-thirds chance of 1.5°C [4].
• AR6's best estimate is 500 GtCO2 for a 50% likelihood of 1.5°C, from the beginning of 2020 [2].
• Per SR15, carbon dioxide removal is limited before 2050 in these pathways [4].
• UNEP's 2022 report put the unconditional-NDC gap to 1.5°C at 23 GtCO2e (range 20–24) [5].
• AR6 identifies an "emissions gap" between 2030 NDC-implied emissions and modelled 1.5°C pathways [3].

8. Why Coming Back to 1.5°C Does Not Undo the Damage

• Some harm stays even after the temperature falls
• The IPCC says overshoot brings harm, and some of it is irreversible (cannot be undone) [3].
• The risk grows with two things: how far temperature goes above the limit, and how long it stays there [3].

• So a return to 1.5°C by 2100 restores the temperature number. It does not restore what was lost.

• Fragile places lose first

• The IPCC says overshooting 1.5°C will cause irreversible harm to low-resilience ecosystems (those least able to recover) [3].

• It names polar, mountain and coastal ecosystems [3].

• The hot period can make the return harder

• Overshoot can bring wildfires, mass tree deaths and the drying of peatlands (wet lands that store huge amounts of old carbon) [3].
• These weaken carbon sinks (forests and soils that absorb CO2) and release more greenhouse gases [3].

• So the hot years themselves add to the CO2 that must later be taken out.

• Falling temperature does not bring quick repair

• A 2024 study in Nature says that, for a range of climate impacts, immediate reversal after overshoot should not be expected [10].
• This answers the question that the note's science section left open.

9. Why the Return Trip Is a Promise, Not a Plan

• The promise is very large
• Carbon dioxide removal, or CDR, means taking CO2 out of the air and storing it.
• UNEP's 2026 report says even the lowest-overshoot scenario still available relies on storing about 320 GtCO2 (billion tonnes of CO2) over this century [6].
• The AR6 estimate of the entire remaining budget was 500 GtCO2 from 2020, at a 50% likelihood [2].

• So the removal needed is nearly two-thirds of that figure. This comparison shows scale only, because the two numbers measure different things.

• The methods are doubtful

• UNEP calls the methods needed for a return by 2100 uncertain, risky and costly [7].

• The Nature study says technical, economic and sustainability limits may stop CDR from reaching such a scale [10].

• A bigger overshoot asks for even more removal

• The IPCC says pathways with overshoot need more CDR than pathways without it, which raises more doubts about whether it can be done and what it will harm [3].

• If the removal fails, nobody can take back the emissions

• The emitting happens first and the removal comes decades later.
• If the removal falls short, temperature simply does not come back. The benefit of emitting has already been enjoyed.

10. Why Better Pledge Numbers Have Not Meant Much Less Warming

• Most of the improvement did not come from stronger pledges
• An NDC (Nationally Determined Contribution) is each country's own climate pledge under the Paris Agreement.
• UNEP's 2025 report projected 2.3–2.5°C of warming this century if NDCs are fully carried out, down from 2.6–2.8°C in the previous edition [7].
• Of that 0.3°C fall, 0.1°C came only from changes in the calculation method [8].
• The expected US exit from the Paris Agreement will cancel another 0.1°C [8].

• That leaves about 0.1°C of real gain from the new pledges.

• A 2100 promise is hard to check today

• A pledge for 2030 or 2035 can be checked against actual emissions.
• A promise to return to 1.5°C by 2100 cannot be checked by anyone now, and the leaders making it will be long gone.

• This is why the authors' demand for accountability clashes with a target that is so far away.

• Exam caution: these temperature figures are from the 2025 edition. The 2026 edition's projection was not retrieved, so check it before quoting.

11. Why the Word 'Overshoot' Cannot Say Who Spent the Budget

• One word, one global line
• Overshoot describes a single temperature curve for the whole world. It names no country.
• A carbon budget can be divided, so it invites the question: whose share was used?

• This is why the choice of word has political effects.

• India's case in numbers

• A PIB release says India contributed only about 4% of cumulative global emissions (all emissions added together over time) from 1850 to 2019 [11].
• India has about one-sixth of humanity [11].

• From this, India concludes it has used far less than its fair share of the global carbon budget [11].

• A return path can squeeze latecomers

• India argues that its emissions can keep growing and that it can peak after the global peak, because poverty removal and development come first [11].
• A return to 1.5°C needs the world to remove more CO2 than it emits after the peak.
• The steeper that fall has to be, the less room remains for a country whose emissions are still rising.

12. Why Money Now Matters More Than Removal Later

• Early cuts need cash today
• Overshoot moves part of the effort into later decades.

• Finance is the part of the deal that can be counted right now. Without it, developing countries cannot make the early cuts that keep the overshoot small.

• India rejected the finance deal on grounds of fairness

• The New Collective Quantified Goal, or NCQG, is the climate finance target agreed at COP29.
• India says it was adopted despite India's objection [13].
• India says the goal goes against equity and CBDR-RC (Common But Differentiated Responsibilities and Respective Capabilities: those who polluted more and can afford more should do more) [13].

• India's Economic Survey says the goal puts climate burdens on countries that did not historically cause the crisis [12].

• India joins the budget argument to the money argument

• In its submission on the Baku to Belém Roadmap to 1.3T (a plan to raise climate finance towards 1.3 trillion dollars), India makes a specific demand [13].
• It asks that developed countries' finance should reflect their share of cumulative global emissions [13].
• So the same history decides both questions: who used the budget and who should pay.

13. The Best Case for Saying 'Overshoot' Out Loud

• The strongest objection: the word is simply honest
• UNEP's 2026 report says the chance of limiting warming to 1.5°C with no or limited overshoot has been lost [6].
• UNEP's 2025 report said a multi-decade average above 1.5°C is very likely within the next decade [7].

• Refusing the word will not remove one tonne of CO2.

• The word can also be used to demand more action

• UNEP says cuts of 26% by 2030 and 46% by 2035 would hold the overshoot to about 0.3°C [7].

• Here, overshoot is the reason for faster cuts, not an excuse for delay.

• Where the authors are still right

• One UNEP scenario peaks near 1.8°C and falls below 1.5°C by the end of the century [9].
• That curve looks reassuring, but it depends on the uncertain and costly removal methods described above [7].

• So the danger is not the word. The danger is a smooth curve that hides its hardest condition.

• The fair-share argument has a limit too

• India's low historical share is a strong claim about who owes what [11].

• But the atmosphere counts every new tonne, whoever emits it. History settles responsibility, not physics.

• Fair conclusion for an answer

• Accept that 1.5°C will be crossed. Contest what is attached to that fact: how high, how long, who removes and who pays.
• The article text available is cut off, so the authors' full reply to this objection is unknown.

14. What COP31 and India Should Actually Push For

• COP31 parties should fix a limit on how high and how long
• The IPCC says risks grow with both the size and the length of overshoot [3].

• UNEP's figure of about 0.3°C gives negotiators a number to start from [7].

• Parties should report removals separately from emission cuts in their NDCs

• If the two are added together, a doubtful future removal can stand in for a real cut today.

• Separate reporting matters because UNEP calls the removal methods uncertain, risky and costly [7].

• The next Global Stocktake should show the budget and who used it

• The Global Stocktake is the Paris Agreement's review of collective progress.

• It should state a clear budget figure, such as the IPCC's [2], next to each country's share of past emissions, as India does for itself [11].

• India's negotiators should keep the budget and finance demands together

• India's roadmap submission already links finance to historical emissions [13].
• India should also explain how its growing emissions serve development, because its fair-share claim will be tested on that point.

15. Anchors for Answers

• Data: India contributed about 4% of cumulative global emissions from 1850 to 2019, with about one-sixth of humanity [11]
• Data: The lowest-overshoot scenario still available relies on storing about 320 GtCO2 over this century [6]
• Data: Full NDC delivery leads to 2.3–2.5°C of warming, as per the 2025 estimate [7]
• Data: Cuts of 26% by 2030 and 46% by 2035 would hold overshoot to about 0.3°C [7]
• Report/Committee: UNEP Emissions Gap Report 2026, The Point of Return: no or limited overshoot of 1.5°C is no longer possible [6]
• Report/Committee: IPCC AR6 Synthesis Report, 2023: overshoot brings harm, some of it irreversible, growing with its size and length [3]
• Report/Committee: Overconfidence in climate overshoot, Nature, 2024: reversal of impacts and large-scale CDR cannot be assumed [10]
• Law/Case: CBDR-RC under the UNFCCC, India's ground for objecting to the NCQG adopted at COP29 [13]

16. Mains Relevance

• GS-III: Conservation, environmental pollution and degradation, environmental impact assessment.
• GS-II: Important international institutions, agencies and fora; global groupings and agreements affecting India's interests.
• Possible question stems:
• "The acceptance of a 1.5°C 'overshoot' is as much a political choice as a scientific conclusion." Critically examine.
• Discuss the significance of the carbon budget approach for climate justice. Why has it remained marginal in multilateral climate negotiations?
• "Without accountability for emissions and delivery of finance, climate summits risk becoming exercises in narrative-building." Discuss with reference to India's interests.

17. Related Topics to Study Next

Study pointers only; these were not sourced for this note.

• Common But Differentiated Responsibilities: the equity principle behind the question of who used the budget.
• Global Stocktake: the Paris Agreement mechanism for assessing collective progress.
• Nationally Determined Contributions: the source of the emissions gap.
• New Collective Quantified Goal on finance: the key reference point for finance commitments.
• Carbon dioxide removal: the technical condition for any return from overshoot.
• Loss and damage: the cost of impacts during higher-temperature periods.
• Net zero and per-capita emissions: central to fair-share arguments.
• Article 6 carbon markets: relevant to accounting integrity and accountability.

18. NCERT Concepts to Revise

• Carbon budget (Economy): The article's central idea: how much CO2 can still be emitted, and who has already used it.
• United Nations Framework Convention on Climate Change (Geography): COP31 is a meeting under this treaty, which is the base of all climate negotiations.
• Conference of the Parties (Geography): COP31 is the 31st meeting of this decision-making body, so you need to know how it works.
• Paris Agreement (Geography): Sets the 1.5°C and 2°C temperature goals that overshoot is measured against.
• Intergovernmental Panel on Climate Change (Geography): Its SR15 and AR6 reports supply the overshoot pathways and carbon budget figures used.
• Nationally determined contributions (Economy): Country pledges whose shortfall creates the emissions gap to the 1.5°C path.
• Common but differentiated responsibilities (Economy): Equity principle behind asking which countries used the most carbon budget and should act more.
• New collective quantified goal (Economy): The key climate finance target against which fulfilment of finance commitments is judged.
• Climate finance (Economy): Money for mitigation and adaptation in developing countries, which the authors say must be delivered.
• Global Stocktake (Geography): Paris Agreement review of collective progress, where carbon budget and 1.5°C ambition are discussed.
• Net zero (Economy): Carbon budget is counted until net-zero emissions, and removals after the peak depend on it.
• Loss and damage (Economy): Covers the cost of harm from higher temperatures during an overshoot period.
• Article 6 carbon markets (Geography): Carbon trading rules that affect how emissions are accounted for and who is held accountable.
• Global warming (Economy): Basic concept behind the debate on exceeding 1.5°C of warming.

19. Common Errors / Trap Areas

• Comparing the budgets directly: 420 GtCO2 and 500 GtCO2 use different probabilities and start years, so the difference is not simply a revision [2][4].
• Reading "overshoot" in its everyday sense: it does not mean a brief or accidental passing here, but a planned exceedance followed by a return by 2100 [1].
• Treating opinion as fact: the critique of the narrative is the authors' argument in an op-ed [1].
• Absolute claim about COP decisions: the authors' statement on carbon budgets needs checking [1]. From memory, and not retrieved here, the first Global Stocktake decision (CMA5, Dubai) expressed historical emissions as about four-fifths of the 1.5°C budget. Verify against the UNFCCC text, noting that a share differs from a quantitative value and a CMA decision differs from a COP decision.
• Using a dated gap figure: 23 GtCO2e comes from the 2022 edition, so check the latest report before quoting it [5].