Fourth Assessment Report

E37073

IPCC assessment report climate change report scientific assessment

The Fourth Assessment Report is a major 2007 synthesis by the Intergovernmental Panel on Climate Change that comprehensively evaluated the scientific evidence for climate change, its impacts, and mitigation options, and strongly influenced global climate policy discussions.

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All labels observed (9)

Label	Occurrences
IPCC Fourth Assessment Report	8
Fourth Assessment Report canonical	5
Climate Change 2007: Synthesis Report	2
Fourth Assessment Report of the Intergovernmental Panel on Climate Change	2
The Physical Science Basis	2
Climate Change 2014: Impacts, Adaptation, and Vulnerability	1
Climate Change 2014: Mitigation of Climate Change	1
IPCC Fourth Assessment Synthesis Report	1
IPCC TAR Synthesis Report	1

How this entity was disambiguated

This entity first appeared as the object of triple T283620 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Fourth Assessment Report
Context triple: [Intergovernmental Panel on Climate Change, notableWork, Fourth Assessment Report]

A. Second Assessment Report
The Second Assessment Report is a major 1995 IPCC publication that comprehensively evaluated the scientific evidence for human-induced climate change and significantly influenced international climate policy, including the Kyoto Protocol negotiations.
B. Special Report on Global Warming of 1.5 °C
The Special Report on Global Warming of 1.5 °C is a landmark IPCC assessment outlining the impacts of global warming of 1.5°C above pre-industrial levels and the pathways needed to limit temperature rise to this threshold.
C. Special Report on Climate Change and Land
The Special Report on Climate Change and Land is a landmark IPCC assessment examining how climate change affects land systems and how land use, agriculture, and forestry can contribute to both mitigation and adaptation.
D. First Assessment Report
The First Assessment Report is the inaugural comprehensive scientific evaluation of climate change produced by the Intergovernmental Panel on Climate Change, which laid the foundation for global climate policy discussions in the early 1990s.
E. Task Force on National Greenhouse Gas Inventories
The Task Force on National Greenhouse Gas Inventories is an expert body that develops internationally accepted methodologies and guidelines for countries to estimate and report their greenhouse gas emissions and removals.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Fourth Assessment Report
Target entity description: The Fourth Assessment Report is a major 2007 synthesis by the Intergovernmental Panel on Climate Change that comprehensively evaluated the scientific evidence for climate change, its impacts, and mitigation options, and strongly influenced global climate policy discussions.

A. Second Assessment Report
The Second Assessment Report is a major 1995 IPCC publication that comprehensively evaluated the scientific evidence for human-induced climate change and significantly influenced international climate policy, including the Kyoto Protocol negotiations.
B. Special Report on Global Warming of 1.5 °C
The Special Report on Global Warming of 1.5 °C is a landmark IPCC assessment outlining the impacts of global warming of 1.5°C above pre-industrial levels and the pathways needed to limit temperature rise to this threshold.
C. Special Report on Climate Change and Land
The Special Report on Climate Change and Land is a landmark IPCC assessment examining how climate change affects land systems and how land use, agriculture, and forestry can contribute to both mitigation and adaptation.
D. First Assessment Report
The First Assessment Report is the inaugural comprehensive scientific evaluation of climate change produced by the Intergovernmental Panel on Climate Change, which laid the foundation for global climate policy discussions in the early 1990s.
E. Task Force on National Greenhouse Gas Inventories
The Task Force on National Greenhouse Gas Inventories is an expert body that develops internationally accepted methodologies and guidelines for countries to estimate and report their greenhouse gas emissions and removals.
F. None of above. chosen

Statements (52)

Predicate	Object
instanceOf	IPCC assessment report ⓘ climate change report ⓘ scientific assessment ⓘ
assesses	adaptation options ⓘ future climate projections ⓘ greenhouse gas emissions scenarios ⓘ mitigation options ⓘ regional climate impacts ⓘ
citedIn	Bali Action Plan ⓘ
concludes	most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations ⓘ warming of the climate system is unequivocal ⓘ
coordinatedBy	IPCC Working Group I ⓘ IPCC Working Group II ⓘ linked to: Working Group II IPCC Working Group III ⓘ linked to: Working Group III
endorsedBy	IPCC Plenary ⓘ
focusesOn	impacts of climate change ⓘ mitigation of climate change ⓘ scientific basis of climate change ⓘ vulnerability to climate change ⓘ
followedBy	Fifth Assessment Report ⓘ
follows	Third Assessment Report ⓘ
geographicScope	global ⓘ
hasComponent	Synthesis Report ⓘ Working Group I contribution ⓘ Working Group II contribution ⓘ Working Group III contribution ⓘ
influenced	United Nations Framework Convention on Climate Change negotiations ⓘ linked to: United Nations Framework Convention on Climate Change global climate policy discussions ⓘ
language	English ⓘ
methodology	assessment of peer-reviewed scientific literature ⓘ
officialName	Fourth Assessment Report of the Intergovernmental Panel on Climate Change ⓘ linked to: Fourth Assessment Report
partOfSeries	IPCC Assessment Reports ⓘ
precededBy	Third Assessment Report ⓘ
publicationYear	2007 ⓘ
publishedBy	Intergovernmental Panel on Climate Change ⓘ
publisher	IPCC ⓘ linked to: Intergovernmental Panel on Climate Change
shortName	AR4 ⓘ
startYearOfRelease	2007 ⓘ
statesLikelihoodTerm	very likely corresponds to probability greater than 90 percent ⓘ
subject	climate change ⓘ climate change adaptation ⓘ climate change impacts ⓘ climate change mitigation ⓘ global warming ⓘ
targetAudience	general public ⓘ policymakers ⓘ scientific community ⓘ
usedAsScientificBasisFor	international climate agreements ⓘ national climate policies ⓘ
workingGroupIContributionTitle	The Physical Science Basis ⓘ linked to: Fourth Assessment Report
workingGroupIIContributionTitle	Impacts, Adaptation and Vulnerability ⓘ
workingGroupIIIContributionTitle	Mitigation of Climate Change ⓘ

How these facts were elicited