Medieval Warm Period
E675173
The Medieval Warm Period was a climatic interval from roughly the 9th to 14th centuries characterized by relatively mild temperatures in parts of the Northern Hemisphere, preceding the cooler conditions of the Little Ice Age.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Medieval Warm Period canonical | 3 |
| Medieval Climate Anomaly | 1 |
| Medieval Warm Epoch | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7581550 — 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: Medieval Warm Period Context triple: [Little Ice Age, follows, Medieval Warm Period]
-
A.
Little Ice Age
The Little Ice Age was a period of cooler global temperatures and glacial expansion, roughly from the 14th to the mid-19th century, that significantly affected climate, agriculture, and societies, especially in the Northern Hemisphere.
-
B.
Holocene climatic optimum
The Holocene climatic optimum was a warm period roughly 9,000–5,000 years ago when global temperatures, especially in the Northern Hemisphere, were higher than today, influencing the spread of forests and early human civilizations.
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C.
Viking Age
The Viking Age was a period from the late 8th to the 11th century marked by Scandinavian seafaring expansion, raids, trade, and settlement across wide areas of Europe and beyond.
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D.
Camelot era
The Camelot era refers to the idealized, nostalgic view of John F. Kennedy’s presidency as a brief, glamorous, and hopeful period in American history.
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E.
Middle Ages
The Middle Ages was a period of European history from roughly the 5th to the late 15th century, marked by feudalism, the rise of Christianity, and the formation of many modern European cultures and languages.
- 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: Medieval Warm Period Target entity description: The Medieval Warm Period was a climatic interval from roughly the 9th to 14th centuries characterized by relatively mild temperatures in parts of the Northern Hemisphere, preceding the cooler conditions of the Little Ice Age.
-
A.
Little Ice Age
The Little Ice Age was a period of cooler global temperatures and glacial expansion, roughly from the 14th to the mid-19th century, that significantly affected climate, agriculture, and societies, especially in the Northern Hemisphere.
-
B.
Holocene climatic optimum
The Holocene climatic optimum was a warm period roughly 9,000–5,000 years ago when global temperatures, especially in the Northern Hemisphere, were higher than today, influencing the spread of forests and early human civilizations.
-
C.
Viking Age
The Viking Age was a period from the late 8th to the 11th century marked by Scandinavian seafaring expansion, raids, trade, and settlement across wide areas of Europe and beyond.
-
D.
Camelot era
The Camelot era refers to the idealized, nostalgic view of John F. Kennedy’s presidency as a brief, glamorous, and hopeful period in American history.
-
E.
Middle Ages
The Middle Ages was a period of European history from roughly the 5th to the late 15th century, marked by feudalism, the rise of Christianity, and the formation of many modern European cultures and languages.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
climatic period
ⓘ
paleoclimatic interval ⓘ |
| affects |
Europe
ⓘ
Greenland ⓘ North America ⓘ North Atlantic region ⓘ
linked to:
North Atlantic biogeographic region
Northern Hemisphere climate ⓘ |
| alternateName |
Medieval Climate Anomaly
ⓘ
linked to:
Medieval Warm Period
Medieval Warm Epoch ⓘ
linked to:
Medieval Warm Period
|
| characterizedBy |
changes in precipitation patterns
ⓘ
regional climatic variability ⓘ relatively mild temperatures in many mid-latitude regions ⓘ shifts in atmospheric circulation ⓘ |
| comparedTo | 20th century warming ⓘ |
| endTime | 14th century ⓘ |
| followedBy | Little Ice Age ⓘ |
| follows |
Dark Ages Cold Period
ⓘ
linked to:
Little Ice Age
|
| hasCauseHypothesis |
North Atlantic Oscillation variability
ⓘ
changes in ocean circulation ⓘ changes in solar irradiance ⓘ internal variability of the climate system ⓘ reduced volcanic activity ⓘ |
| hasDuration | approximately 400–500 years ⓘ |
| hasKeyRegion |
Central Europe
ⓘ
North Atlantic sector ⓘ
linked to:
North Atlantic biogeographic region
Western Europe ⓘ parts of East Asia ⓘ parts of North America ⓘ |
| hasRelativeTemperature |
warmer than preceding centuries in parts of the Northern Hemisphere
ⓘ
warmer than subsequent Little Ice Age in many regions ⓘ |
| hasScientificConsensus |
modern late-20th and early-21st century warming exceeds its global mean temperature
ⓘ
was not globally synchronous or uniformly warm everywhere ⓘ |
| hasUncertainty |
magnitude of warming varies by proxy record
ⓘ
timing varies by region ⓘ |
| influenced |
Norse expansion into North Atlantic islands
ⓘ
Norse settlement in Greenland ⓘ agricultural practices in parts of Europe ⓘ |
| precededBy | generally cooler early medieval conditions ⓘ |
| startTime | 9th century ⓘ |
| studiedUsing |
glacier advance and retreat records
ⓘ
historical documentary records ⓘ ice cores ⓘ lake sediments ⓘ marine sediments ⓘ tree-ring data ⓘ |
| succeededBy | prolonged cooling of the Little Ice Age ⓘ |
| temporalRelation | occurs during the High Middle Ages ⓘ |
| usedIn | climate change public debates ⓘ |
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: Medieval Warm Period Description of subject: The Medieval Warm Period was a climatic interval from roughly the 9th to 14th centuries characterized by relatively mild temperatures in parts of the Northern Hemisphere, preceding the cooler conditions of the Little Ice Age.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Medieval Warm Period
linked to: Medieval Warm Period