8.2 kiloyear event
E87434
The 8.2 kiloyear event was a sudden, short-lived global cooling episode during the early Holocene, likely triggered by massive meltwater outbursts disrupting North Atlantic ocean circulation.
All labels observed (2)
| Label | Occurrences |
|---|---|
| 8.2 kiloyear event canonical | 1 |
| 8.2 kyr event | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T742184 — 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: 8.2 kiloyear event Context triple: [Holocene, containsEvent, 8.2 kiloyear event]
-
A.
Holocene
The Holocene is the current geological epoch, beginning around 11,700 years ago, characterized by relatively stable climate conditions and the development of human civilizations.
-
B.
Cretaceous–Paleogene boundary
The Cretaceous–Paleogene boundary marks the geological transition 66 million years ago associated with a mass extinction event that wiped out non-avian dinosaurs and many other species, likely triggered by a large asteroid impact.
-
C.
Wisconsin glaciation
The Wisconsin glaciation was the last major advance of continental ice sheets in North America during the Pleistocene, profoundly reshaping the continent’s landscapes and drainage systems.
-
D.
Eocene–Oligocene climate transition
The Eocene–Oligocene climate transition was a major global cooling event around 34 million years ago that marked the shift from a greenhouse to an icehouse Earth, including the formation of large Antarctic ice sheets.
-
E.
Permian–Triassic mass extinction
The Permian–Triassic mass extinction was the most severe biodiversity crisis in Earth's history, wiping out the majority of marine and terrestrial species around 252 million years ago and marking the boundary between the Paleozoic and Mesozoic eras.
- 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: 8.2 kiloyear event Target entity description: The 8.2 kiloyear event was a sudden, short-lived global cooling episode during the early Holocene, likely triggered by massive meltwater outbursts disrupting North Atlantic ocean circulation.
-
A.
Holocene
The Holocene is the current geological epoch, beginning around 11,700 years ago, characterized by relatively stable climate conditions and the development of human civilizations.
-
B.
Cretaceous–Paleogene boundary
The Cretaceous–Paleogene boundary marks the geological transition 66 million years ago associated with a mass extinction event that wiped out non-avian dinosaurs and many other species, likely triggered by a large asteroid impact.
-
C.
Wisconsin glaciation
The Wisconsin glaciation was the last major advance of continental ice sheets in North America during the Pleistocene, profoundly reshaping the continent’s landscapes and drainage systems.
-
D.
Eocene–Oligocene climate transition
The Eocene–Oligocene climate transition was a major global cooling event around 34 million years ago that marked the shift from a greenhouse to an icehouse Earth, including the formation of large Antarctic ice sheets.
-
E.
Permian–Triassic mass extinction
The Permian–Triassic mass extinction was the most severe biodiversity crisis in Earth's history, wiping out the majority of marine and terrestrial species around 252 million years ago and marking the boundary between the Paleozoic and Mesozoic eras.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Holocene cooling event
ⓘ
abrupt climate change event ⓘ climatic event ⓘ paleoclimatic anomaly ⓘ |
| alsoKnownAs |
8.2 ka event
ⓘ
8.2 kiloyear event ⓘ
surface form:
8.2 kyr event
8.2 thousand years ago cooling event ⓘ |
| approximateAgeBeforePresent | 8200 years ⓘ |
| associatedWith |
Laurentide Ice Sheet decay
ⓘ
drainage of proglacial lakes Agassiz and Ojibway ⓘ |
| cause |
disruption of North Atlantic thermohaline circulation
ⓘ
freshwater influx into North Atlantic Ocean ⓘ massive meltwater outburst ⓘ |
| characteristic |
global or near-global impact
ⓘ
short-lived cooling ⓘ sudden onset ⓘ |
| chronologicalPosition | approximately 6200 BCE ⓘ |
| duration | about 100 to 200 years ⓘ |
| effect |
changes in atmospheric circulation patterns
ⓘ
changes in monsoon systems ⓘ cooling in North Atlantic region ⓘ hydrological changes in many regions ⓘ reduction in Northern Hemisphere temperatures ⓘ |
| evidenceFrom |
Greenland ice cores
ⓘ
lake sediment records ⓘ marine sediment cores ⓘ pollen records ⓘ speleothem records ⓘ |
| follows |
Younger Dryas cold event
ⓘ
surface form:
Younger Dryas termination
|
| geographicExtent |
Northern Hemisphere
ⓘ
global climate system ⓘ primarily North Atlantic region ⓘ |
| impactOn |
agricultural development in the Near East
ⓘ
early Neolithic societies in some regions ⓘ |
| linkedTo | temporary weakening of North Atlantic Deep Water formation ⓘ |
| partOf |
Holocene climatic optimum
ⓘ
surface form:
Holocene climate variability
|
| precedes | 4.2 kiloyear event ⓘ |
| relatedTo |
Atlantic Meridional Overturning Circulation
ⓘ
freshwater forcing experiments in climate models ⓘ |
| significance |
constraint on climate model sensitivity to freshwater input
ⓘ
natural analogue for abrupt climate change ⓘ |
| studiedIn |
Holocene climate research
ⓘ
Quaternary science ⓘ paleoclimatology ⓘ |
| temperatureAnomaly | cooling of about 1 to 3 degrees Celsius in some regions ⓘ |
| timePeriod | early Holocene ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: 8.2 kiloyear event Description of subject: The 8.2 kiloyear event was a sudden, short-lived global cooling episode during the early Holocene, likely triggered by massive meltwater outbursts disrupting North Atlantic ocean circulation.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
8.2 kyr event