Intergovernmental Panel on Climate Change

Also called: IPCC · Topic: Climate Change: Causes, Evidence and the Global Response · NCERT: Beyond NCERT

Meaning

The Intergovernmental Panel on Climate Change (IPCC) is a UN body, set up in 1988 by WMO and UNEP. It reads and judges the climate science that has already been published, and sums it up for governments. It does no research of its own.

It matters because its reports are the agreed scientific base for every COP negotiation. Its AR6 found that human influence has "unequivocally" warmed the atmosphere, ocean and land.

Explanation

Who set it up and what it does

• Founded in 1988 by two UN bodies:
• WMO (World Meteorological Organization): the UN agency for weather, climate and water.

• UNEP (United Nations Environment Programme).

• What it does not do: it runs no labs and takes no measurements of its own.

• What it does:
• Thousands of scientists study papers that are already published.
• They write assessment reports (ARs), which are big reviews of all the known science.
• The reports are written for policymakers, so governments can use them in climate talks.

How a report is built: Working Groups and the Synthesis Report

• Each AR is written in three parts, one by each Working Group (WG):
• WG I: the physical science (how and why the climate is changing).
• WG II: impacts and adaptation (how people and nature are affected, and how they can adjust).

• WG III: mitigation (cutting emissions).

• A Synthesis Report then joins all three parts into one summary.

• Special reports look at one theme in depth. The sixth cycle had three:
• Global Warming of 1.5 °C (2018): what a world 1.5 °C warmer than pre-industrial times looks like, and the emission paths that keep warming within that limit.
• Ocean and Cryosphere in a Changing Climate (2019): cryosphere means the frozen parts of Earth, such as glaciers, ice sheets, sea ice and permafrost (ground that stays frozen all year).
• Climate Change and Land (2019): land degradation, desertification and food security.

The key assessment reports and how science shaped policy

Report	Year	Why it matters
AR1	1990	Showed warming is a real risk, so countries negotiated the UNFCCC (1992)
AR4	2007	The IPCC shared the Nobel Peace Prize (2007) with Al Gore
AR6	WG reports 2021–22; Synthesis Report March 2023	Said human influence has "unequivocally" warmed the atmosphere, ocean and land

• Why "unequivocally" is a big step:
• The word means "with no doubt at all".
• Earlier reports used words of likelihood, such as "likely" and "very likely".

• AR6 was the first report to state human-caused warming as plain fact.

• Science leading to treaties:

• AR1 fed into the UNFCCC.
• The 1.5 °C special report (SR1.5) drove the push for a 1.5 °C goal.

The seventh cycle (AR7): work now under way

• Chair: Jim Skea (United Kingdom), elected in 2023.
• Special Report on Climate Change and Cities:
• The Panel chose this report at its 43rd Session (Nairobi, Kenya, 11–13 April 2016), when it decided which products the sixth cycle would leave for the seventh [2].
• Its outline was agreed at the 61st Plenary Session in Sofia, Bulgaria (2024). It was one of the first two reports of the seventh cycle to have its outline agreed [1].
• Approval and publication are scheduled for March 2027 [1].
• Unlike most reports, its scientific leadership is shared by all three Working Groups [2].

• Planned content: trends, challenges and opportunities for cities; actions to cut urban risks and emissions; ways to speed up change in cities; and solutions by city type and region [1].

• Why cities: most people live in cities, and cities produce a large share of emissions.

Where it occurs

• Global reach: the IPCC serves governments around the world. Its reports feed the yearly COP (Conference of the Parties) meetings under the UNFCCC, whose secretariat is in Bonn, Germany.
• Who runs it: the Panel of governments, set up in 1988 by WMO and UNEP. In the seventh cycle it is chaired by Jim Skea (United Kingdom).
• Key session venues:
• Nairobi, Kenya (43rd Session, April 2016): chose the Cities report for the seventh cycle [2].

• Sofia, Bulgaria (61st Session, 2024): agreed the Cities report outline [1].

• Link to the Rio Earth Summit: AR1 (1990) led to the UNFCCC, which opened for signature at Rio de Janeiro, Brazil, in June 1992.

• India:
• IPCC findings support India's case in COP talks for equity and climate justice.
• The coming Cities report (2027) matters for Indian cities, which face heat waves, floods and sea-level rise.

Don't confuse with

• UNFCCC: a treaty (1992, in force 1994) where countries negotiate who must act. The IPCC is a science-assessment body. It signs no treaty and sets no targets.
• WMO and UNEP: the two parent UN bodies that set up the IPCC in 1988. They are not the IPCC itself.
• A research institute: the IPCC does no original research. It only assesses science that is already published. "IPCC conducts climate research" is a common false statement.
• Assessment Report vs Special Report: an AR covers all climate science in three WG parts plus a Synthesis Report. A Special Report covers one theme, such as 1.5 °C, the ocean and cryosphere, land, or cities.

Prelims Hooks

• IPCC: set up in 1988 by WMO + UNEP. It does no research of its own.
• AR4 (2007) led to the Nobel Peace Prize 2007, shared with Al Gore.
• AR6 Synthesis Report: March 2023. It was the first to call human-caused warming "unequivocal".
• Working Groups: WG I = physical science; WG II = impacts and adaptation; WG III = mitigation.
• Sixth-cycle special reports: Global Warming of 1.5 °C (2018); Ocean and Cryosphere (2019); Climate Change and Land (2019).
• AR7: chaired by Jim Skea (UK). The Special Report on Climate Change and Cities had its outline agreed at IPCC-61, Sofia (2024). It is due in March 2027 and is led jointly by all three Working Groups [1][2].

Mains Points

• Science shapes climate policy (GS-III):
• Each IPCC cycle has driven a treaty step: AR1 led to the UNFCCC (1992), and SR1.5 drove the push for 1.5 °C.

• AR6's "unequivocal" finding removed doubt about human-caused warming, which makes delay harder to defend at COPs.

• Use for India's negotiating position:

• IPCC evidence on historical emissions supports India's anchor principle, CBDR-RC (common but differentiated responsibilities and respective capabilities).

• India uses it to argue for equity, climate justice, and finance and technology transfer from developed countries.

• Cities report and urban India:

• The Special Report on Climate Change and Cities (due March 2027) will cover urban risks, emission cuts and solutions by city type and region [1].
• It is directly useful for India's fast-growing cities, which face heat waves, floods and sea-level rise.

Related concepts

• United Nations Framework Convention on Climate Change
• Common but differentiated responsibilities
• Kyoto Protocol

Read more

• The international regime: UNFCCC, CBDR, Kyoto and the IPCC