Antarctic ozone hole
E729843
The Antarctic ozone hole is a region of severely depleted ozone in the stratosphere above Antarctica that forms each spring due to chemical reactions involving human-made pollutants like chlorofluorocarbons (CFCs).
All labels observed (1)
| Label | Occurrences |
|---|---|
| Antarctic ozone hole canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8379074 — 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: Antarctic ozone hole Context triple: [OMPS, monitors, Antarctic ozone hole]
-
A.
Dome A
Dome A is the highest ice feature on the Antarctic Plateau, known as one of the coldest and most remote places on Earth and a prime site for glaciological and astronomical research.
-
B.
Άρειος Πάγος
Άρειος Πάγος is the highest court in Greece for civil and criminal cases, serving as the country’s supreme judicial authority in these matters.
-
C.
Kaus Australis
Kaus Australis is a prominent blue-white giant star in the constellation Sagittarius, notable as one of its brightest and most easily visible members.
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D.
McMurdo Dry Valleys
McMurdo Dry Valleys are a polar desert region of Antarctica known as one of the driest and most Mars-like environments on Earth, hosting unique cold-adapted ecosystems.
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E.
Doomsday Glacier
Doomsday Glacier is the ominous nickname for Antarctica’s Thwaites Glacier, a massive and rapidly melting ice sheet whose potential collapse could significantly raise global sea levels.
- 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: Antarctic ozone hole Target entity description: The Antarctic ozone hole is a region of severely depleted ozone in the stratosphere above Antarctica that forms each spring due to chemical reactions involving human-made pollutants like chlorofluorocarbons (CFCs).
-
A.
Dome A
Dome A is the highest ice feature on the Antarctic Plateau, known as one of the coldest and most remote places on Earth and a prime site for glaciological and astronomical research.
-
B.
Άρειος Πάγος
Άρειος Πάγος is the highest court in Greece for civil and criminal cases, serving as the country’s supreme judicial authority in these matters.
-
C.
Kaus Australis
Kaus Australis is a prominent blue-white giant star in the constellation Sagittarius, notable as one of its brightest and most easily visible members.
-
D.
McMurdo Dry Valleys
McMurdo Dry Valleys are a polar desert region of Antarctica known as one of the driest and most Mars-like environments on Earth, hosting unique cold-adapted ecosystems.
-
E.
Doomsday Glacier
Doomsday Glacier is the ominous nickname for Antarctica’s Thwaites Glacier, a massive and rapidly melting ice sheet whose potential collapse could significantly raise global sea levels.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
atmospheric phenomenon
ⓘ
ozone depletion region ⓘ |
| affects |
southern high-latitude ecosystems
ⓘ
ultraviolet radiation levels over Antarctica ⓘ |
| causedBy |
CFCs
ⓘ
linked to:
Freon
chlorofluorocarbons ⓘ halons ⓘ human-made pollutants ⓘ other ozone-depleting substances ⓘ |
| dependsOn |
Antarctic polar vortex
ⓘ
very low stratospheric temperatures ⓘ |
| discoveredIn | 1980s ⓘ |
| expectedRecovery | mid-21st century or later ⓘ |
| firstMajorPublicationYear | 1985 ⓘ |
| firstReportedBy | British Antarctic Survey ⓘ |
| hasArea | up to about 25 million square kilometers ⓘ |
| hasCause |
catalytic destruction of ozone by bromine radicals
ⓘ
catalytic destruction of ozone by chlorine radicals ⓘ |
| hasConsequence |
increased risk of eye damage from UV exposure
ⓘ
increased risk of skin cancer from UV exposure ⓘ |
| hasMechanism |
activation of chlorine from reservoir species
ⓘ
formation of polar stratospheric clouds ⓘ heterogeneous chemistry on polar stratospheric cloud particles ⓘ springtime sunlight-driven photochemistry ⓘ |
| hasPart | severely depleted ozone layer ⓘ |
| hasPeakExtentMonth |
October
ⓘ
September ⓘ |
| hasProperty |
enhanced ultraviolet radiation at surface
ⓘ
recurring annually ⓘ seasonal ⓘ severe ozone depletion ⓘ |
| locatedAbove |
Antarctic continent
ⓘ
linked to:
Antarctica
|
| locatedIn | stratosphere ⓘ |
| location | Antarctica ⓘ |
| measuredInUnits | Dobson Units ⓘ |
| mitigatedBy |
Montreal Protocol
ⓘ
phase-out of CFCs ⓘ |
| observedBy |
balloon-borne instruments
ⓘ
ground-based Dobson spectrophotometers ⓘ satellite instruments ⓘ |
| occursInMonth |
October
ⓘ
September ⓘ early November ⓘ |
| occursInSeason | austral spring ⓘ |
| relatedTo |
Arctic ozone depletion
ⓘ
global ozone depletion ⓘ |
| trend | signs of gradual recovery in early 21st century ⓘ |
| typicalMinimumOzoneColumn | less than 100 Dobson Units ⓘ |
| typicalUndisturbedOzoneColumn | about 300 Dobson Units ⓘ |
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: Antarctic ozone hole Description of subject: The Antarctic ozone hole is a region of severely depleted ozone in the stratosphere above Antarctica that forms each spring due to chemical reactions involving human-made pollutants like chlorofluorocarbons (CFCs).
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.